Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1 | //===--- ParseExpr.cpp - Expression Parsing -------------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
Chris Lattner | 0bc735f | 2007-12-29 19:59:25 +0000 | [diff] [blame] | 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | // |
| 10 | // This file implements the Expression parsing implementation. Expressions in |
| 11 | // C99 basically consist of a bunch of binary operators with unary operators and |
| 12 | // other random stuff at the leaves. |
| 13 | // |
| 14 | // In the C99 grammar, these unary operators bind tightest and are represented |
| 15 | // as the 'cast-expression' production. Everything else is either a binary |
| 16 | // operator (e.g. '/') or a ternary operator ("?:"). The unary leaves are |
| 17 | // handled by ParseCastExpression, the higher level pieces are handled by |
| 18 | // ParseBinaryExpression. |
| 19 | // |
| 20 | //===----------------------------------------------------------------------===// |
| 21 | |
| 22 | #include "clang/Parse/Parser.h" |
John McCall | 1951085 | 2010-08-20 18:27:03 +0000 | [diff] [blame] | 23 | #include "clang/Sema/DeclSpec.h" |
| 24 | #include "clang/Sema/Scope.h" |
| 25 | #include "clang/Sema/ParsedTemplate.h" |
Chris Lattner | 6b91f00 | 2009-03-05 07:32:12 +0000 | [diff] [blame] | 26 | #include "clang/Basic/PrettyStackTrace.h" |
Chris Lattner | d167ca0 | 2009-12-10 00:21:05 +0000 | [diff] [blame] | 27 | #include "RAIIObjectsForParser.h" |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 28 | #include "llvm/ADT/SmallVector.h" |
| 29 | #include "llvm/ADT/SmallString.h" |
| 30 | using namespace clang; |
| 31 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 32 | /// getBinOpPrecedence - Return the precedence of the specified binary operator |
Chris Lattner | dfe503e | 2010-07-19 05:07:24 +0000 | [diff] [blame] | 33 | /// token. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 34 | static prec::Level getBinOpPrecedence(tok::TokenKind Kind, |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 35 | bool GreaterThanIsOperator, |
| 36 | bool CPlusPlus0x) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 37 | switch (Kind) { |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 38 | case tok::greater: |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 39 | // C++ [temp.names]p3: |
| 40 | // [...] When parsing a template-argument-list, the first |
| 41 | // non-nested > is taken as the ending delimiter rather than a |
| 42 | // greater-than operator. [...] |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 43 | if (GreaterThanIsOperator) |
| 44 | return prec::Relational; |
| 45 | return prec::Unknown; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 46 | |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 47 | case tok::greatergreater: |
| 48 | // C++0x [temp.names]p3: |
| 49 | // |
| 50 | // [...] Similarly, the first non-nested >> is treated as two |
| 51 | // consecutive but distinct > tokens, the first of which is |
| 52 | // taken as the end of the template-argument-list and completes |
| 53 | // the template-id. [...] |
| 54 | if (GreaterThanIsOperator || !CPlusPlus0x) |
| 55 | return prec::Shift; |
| 56 | return prec::Unknown; |
| 57 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 58 | default: return prec::Unknown; |
| 59 | case tok::comma: return prec::Comma; |
| 60 | case tok::equal: |
| 61 | case tok::starequal: |
| 62 | case tok::slashequal: |
| 63 | case tok::percentequal: |
| 64 | case tok::plusequal: |
| 65 | case tok::minusequal: |
| 66 | case tok::lesslessequal: |
| 67 | case tok::greatergreaterequal: |
| 68 | case tok::ampequal: |
| 69 | case tok::caretequal: |
| 70 | case tok::pipeequal: return prec::Assignment; |
| 71 | case tok::question: return prec::Conditional; |
| 72 | case tok::pipepipe: return prec::LogicalOr; |
| 73 | case tok::ampamp: return prec::LogicalAnd; |
| 74 | case tok::pipe: return prec::InclusiveOr; |
| 75 | case tok::caret: return prec::ExclusiveOr; |
| 76 | case tok::amp: return prec::And; |
| 77 | case tok::exclaimequal: |
| 78 | case tok::equalequal: return prec::Equality; |
| 79 | case tok::lessequal: |
| 80 | case tok::less: |
Douglas Gregor | 55f6b14 | 2009-02-09 18:46:07 +0000 | [diff] [blame] | 81 | case tok::greaterequal: return prec::Relational; |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 82 | case tok::lessless: return prec::Shift; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 83 | case tok::plus: |
| 84 | case tok::minus: return prec::Additive; |
| 85 | case tok::percent: |
| 86 | case tok::slash: |
| 87 | case tok::star: return prec::Multiplicative; |
Sebastian Redl | 2246050 | 2009-02-07 00:15:38 +0000 | [diff] [blame] | 88 | case tok::periodstar: |
| 89 | case tok::arrowstar: return prec::PointerToMember; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 90 | } |
| 91 | } |
| 92 | |
| 93 | |
| 94 | /// ParseExpression - Simple precedence-based parser for binary/ternary |
| 95 | /// operators. |
| 96 | /// |
| 97 | /// Note: we diverge from the C99 grammar when parsing the assignment-expression |
| 98 | /// production. C99 specifies that the LHS of an assignment operator should be |
| 99 | /// parsed as a unary-expression, but consistency dictates that it be a |
| 100 | /// conditional-expession. In practice, the important thing here is that the |
| 101 | /// LHS of an assignment has to be an l-value, which productions between |
| 102 | /// unary-expression and conditional-expression don't produce. Because we want |
| 103 | /// consistency, we parse the LHS as a conditional-expression, then check for |
| 104 | /// l-value-ness in semantic analysis stages. |
| 105 | /// |
Sebastian Redl | 2246050 | 2009-02-07 00:15:38 +0000 | [diff] [blame] | 106 | /// pm-expression: [C++ 5.5] |
| 107 | /// cast-expression |
| 108 | /// pm-expression '.*' cast-expression |
| 109 | /// pm-expression '->*' cast-expression |
| 110 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 111 | /// multiplicative-expression: [C99 6.5.5] |
Sebastian Redl | 2246050 | 2009-02-07 00:15:38 +0000 | [diff] [blame] | 112 | /// Note: in C++, apply pm-expression instead of cast-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 113 | /// cast-expression |
| 114 | /// multiplicative-expression '*' cast-expression |
| 115 | /// multiplicative-expression '/' cast-expression |
| 116 | /// multiplicative-expression '%' cast-expression |
| 117 | /// |
| 118 | /// additive-expression: [C99 6.5.6] |
| 119 | /// multiplicative-expression |
| 120 | /// additive-expression '+' multiplicative-expression |
| 121 | /// additive-expression '-' multiplicative-expression |
| 122 | /// |
| 123 | /// shift-expression: [C99 6.5.7] |
| 124 | /// additive-expression |
| 125 | /// shift-expression '<<' additive-expression |
| 126 | /// shift-expression '>>' additive-expression |
| 127 | /// |
| 128 | /// relational-expression: [C99 6.5.8] |
| 129 | /// shift-expression |
| 130 | /// relational-expression '<' shift-expression |
| 131 | /// relational-expression '>' shift-expression |
| 132 | /// relational-expression '<=' shift-expression |
| 133 | /// relational-expression '>=' shift-expression |
| 134 | /// |
| 135 | /// equality-expression: [C99 6.5.9] |
| 136 | /// relational-expression |
| 137 | /// equality-expression '==' relational-expression |
| 138 | /// equality-expression '!=' relational-expression |
| 139 | /// |
| 140 | /// AND-expression: [C99 6.5.10] |
| 141 | /// equality-expression |
| 142 | /// AND-expression '&' equality-expression |
| 143 | /// |
| 144 | /// exclusive-OR-expression: [C99 6.5.11] |
| 145 | /// AND-expression |
| 146 | /// exclusive-OR-expression '^' AND-expression |
| 147 | /// |
| 148 | /// inclusive-OR-expression: [C99 6.5.12] |
| 149 | /// exclusive-OR-expression |
| 150 | /// inclusive-OR-expression '|' exclusive-OR-expression |
| 151 | /// |
| 152 | /// logical-AND-expression: [C99 6.5.13] |
| 153 | /// inclusive-OR-expression |
| 154 | /// logical-AND-expression '&&' inclusive-OR-expression |
| 155 | /// |
| 156 | /// logical-OR-expression: [C99 6.5.14] |
| 157 | /// logical-AND-expression |
| 158 | /// logical-OR-expression '||' logical-AND-expression |
| 159 | /// |
| 160 | /// conditional-expression: [C99 6.5.15] |
| 161 | /// logical-OR-expression |
| 162 | /// logical-OR-expression '?' expression ':' conditional-expression |
| 163 | /// [GNU] logical-OR-expression '?' ':' conditional-expression |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 164 | /// [C++] the third operand is an assignment-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 165 | /// |
| 166 | /// assignment-expression: [C99 6.5.16] |
| 167 | /// conditional-expression |
| 168 | /// unary-expression assignment-operator assignment-expression |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 169 | /// [C++] throw-expression [C++ 15] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 170 | /// |
| 171 | /// assignment-operator: one of |
| 172 | /// = *= /= %= += -= <<= >>= &= ^= |= |
| 173 | /// |
| 174 | /// expression: [C99 6.5.17] |
| 175 | /// assignment-expression |
| 176 | /// expression ',' assignment-expression |
| 177 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 178 | ExprResult Parser::ParseExpression() { |
| 179 | ExprResult LHS(ParseAssignmentExpression()); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 180 | return ParseRHSOfBinaryExpression(move(LHS), prec::Comma); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 181 | } |
| 182 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 183 | /// This routine is called when the '@' is seen and consumed. |
Fariborz Jahanian | 397fcc1 | 2007-09-19 19:14:32 +0000 | [diff] [blame] | 184 | /// Current token is an Identifier and is not a 'try'. This |
Chris Lattner | c97c204 | 2007-10-03 22:03:06 +0000 | [diff] [blame] | 185 | /// routine is necessary to disambiguate @try-statement from, |
| 186 | /// for example, @encode-expression. |
Fariborz Jahanian | 397fcc1 | 2007-09-19 19:14:32 +0000 | [diff] [blame] | 187 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 188 | ExprResult |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 189 | Parser::ParseExpressionWithLeadingAt(SourceLocation AtLoc) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 190 | ExprResult LHS(ParseObjCAtExpression(AtLoc)); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 191 | return ParseRHSOfBinaryExpression(move(LHS), prec::Comma); |
Fariborz Jahanian | 397fcc1 | 2007-09-19 19:14:32 +0000 | [diff] [blame] | 192 | } |
| 193 | |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 194 | /// This routine is called when a leading '__extension__' is seen and |
| 195 | /// consumed. This is necessary because the token gets consumed in the |
| 196 | /// process of disambiguating between an expression and a declaration. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 197 | ExprResult |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 198 | Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 199 | ExprResult LHS(true); |
Eli Friedman | bc6c848 | 2009-05-16 23:40:44 +0000 | [diff] [blame] | 200 | { |
| 201 | // Silence extension warnings in the sub-expression |
| 202 | ExtensionRAIIObject O(Diags); |
| 203 | |
| 204 | LHS = ParseCastExpression(false); |
Eli Friedman | bc6c848 | 2009-05-16 23:40:44 +0000 | [diff] [blame] | 205 | } |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 206 | |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 207 | if (!LHS.isInvalid()) |
| 208 | LHS = Actions.ActOnUnaryOp(getCurScope(), ExtLoc, tok::kw___extension__, |
| 209 | LHS.take()); |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 210 | |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 211 | return ParseRHSOfBinaryExpression(move(LHS), prec::Comma); |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 212 | } |
| 213 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 214 | /// ParseAssignmentExpression - Parse an expr that doesn't include commas. |
| 215 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 216 | ExprResult Parser::ParseAssignmentExpression() { |
Douglas Gregor | 01dfea0 | 2010-01-10 23:08:15 +0000 | [diff] [blame] | 217 | if (Tok.is(tok::code_completion)) { |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 218 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Expression); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 219 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 01dfea0 | 2010-01-10 23:08:15 +0000 | [diff] [blame] | 220 | } |
| 221 | |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 222 | if (Tok.is(tok::kw_throw)) |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 223 | return ParseThrowExpression(); |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 224 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 225 | ExprResult LHS(ParseCastExpression(false)); |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 226 | return ParseRHSOfBinaryExpression(move(LHS), prec::Assignment); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 227 | } |
| 228 | |
Chris Lattner | b93fb49 | 2008-06-02 21:31:07 +0000 | [diff] [blame] | 229 | /// ParseAssignmentExprWithObjCMessageExprStart - Parse an assignment expression |
| 230 | /// where part of an objc message send has already been parsed. In this case |
| 231 | /// LBracLoc indicates the location of the '[' of the message send, and either |
| 232 | /// ReceiverName or ReceiverExpr is non-null indicating the receiver of the |
| 233 | /// message. |
| 234 | /// |
| 235 | /// Since this handles full assignment-expression's, it handles postfix |
| 236 | /// expressions and other binary operators for these expressions as well. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 237 | ExprResult |
Chris Lattner | b93fb49 | 2008-06-02 21:31:07 +0000 | [diff] [blame] | 238 | Parser::ParseAssignmentExprWithObjCMessageExprStart(SourceLocation LBracLoc, |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 239 | SourceLocation SuperLoc, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 240 | ParsedType ReceiverType, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 241 | Expr *ReceiverExpr) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 242 | ExprResult R |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 243 | = ParseObjCMessageExpressionBody(LBracLoc, SuperLoc, |
| 244 | ReceiverType, ReceiverExpr); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 245 | if (R.isInvalid()) return move(R); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 246 | R = ParsePostfixExpressionSuffix(R.take()); |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 247 | return ParseRHSOfBinaryExpression(R, prec::Assignment); |
Chris Lattner | b93fb49 | 2008-06-02 21:31:07 +0000 | [diff] [blame] | 248 | } |
| 249 | |
| 250 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 251 | ExprResult Parser::ParseConstantExpression() { |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 252 | // C++ [basic.def.odr]p2: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 253 | // An expression is potentially evaluated unless it appears where an |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 254 | // integral constant expression is required (see 5.19) [...]. |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 255 | EnterExpressionEvaluationContext Unevaluated(Actions, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 256 | Sema::Unevaluated); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 257 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 258 | ExprResult LHS(ParseCastExpression(false)); |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 259 | return ParseRHSOfBinaryExpression(LHS, prec::Conditional); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 260 | } |
| 261 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 262 | /// ParseRHSOfBinaryExpression - Parse a binary expression that starts with |
| 263 | /// LHS and has a precedence of at least MinPrec. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 264 | ExprResult |
| 265 | Parser::ParseRHSOfBinaryExpression(ExprResult LHS, prec::Level MinPrec) { |
Douglas Gregor | 6aa14d8 | 2010-04-21 22:36:40 +0000 | [diff] [blame] | 266 | prec::Level NextTokPrec = getBinOpPrecedence(Tok.getKind(), |
| 267 | GreaterThanIsOperator, |
| 268 | getLang().CPlusPlus0x); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 269 | SourceLocation ColonLoc; |
| 270 | |
| 271 | while (1) { |
| 272 | // If this token has a lower precedence than we are allowed to parse (e.g. |
| 273 | // because we are called recursively, or because the token is not a binop), |
| 274 | // then we are done! |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 275 | if (NextTokPrec < MinPrec) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 276 | return move(LHS); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 277 | |
| 278 | // Consume the operator, saving the operator token for error reporting. |
Chris Lattner | d217773 | 2007-07-20 16:59:19 +0000 | [diff] [blame] | 279 | Token OpToken = Tok; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 280 | ConsumeToken(); |
Sebastian Redl | 2246050 | 2009-02-07 00:15:38 +0000 | [diff] [blame] | 281 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 282 | // Special case handling for the ternary operator. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 283 | ExprResult TernaryMiddle(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 284 | if (NextTokPrec == prec::Conditional) { |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 285 | if (Tok.isNot(tok::colon)) { |
Chris Lattner | a69d0ed | 2009-12-10 02:02:58 +0000 | [diff] [blame] | 286 | // Don't parse FOO:BAR as if it were a typo for FOO::BAR. |
| 287 | ColonProtectionRAIIObject X(*this); |
| 288 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 289 | // Handle this production specially: |
| 290 | // logical-OR-expression '?' expression ':' conditional-expression |
| 291 | // In particular, the RHS of the '?' is 'expression', not |
| 292 | // 'logical-OR-expression' as we might expect. |
| 293 | TernaryMiddle = ParseExpression(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 294 | if (TernaryMiddle.isInvalid()) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 295 | return move(TernaryMiddle); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 296 | } else { |
| 297 | // Special case handling of "X ? Y : Z" where Y is empty: |
| 298 | // logical-OR-expression '?' ':' conditional-expression [GNU] |
Sebastian Redl | 15faa7f | 2008-12-09 20:22:58 +0000 | [diff] [blame] | 299 | TernaryMiddle = 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 300 | Diag(Tok, diag::ext_gnu_conditional_expr); |
| 301 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 302 | |
Chris Lattner | e5deae9 | 2010-04-20 21:33:39 +0000 | [diff] [blame] | 303 | if (Tok.is(tok::colon)) { |
| 304 | // Eat the colon. |
| 305 | ColonLoc = ConsumeToken(); |
| 306 | } else { |
Chris Lattner | 2472882 | 2010-05-24 22:31:37 +0000 | [diff] [blame] | 307 | // Otherwise, we're missing a ':'. Assume that this was a typo that the |
| 308 | // user forgot. If we're not in a macro instantion, we can suggest a |
| 309 | // fixit hint. If there were two spaces before the current token, |
| 310 | // suggest inserting the colon in between them, otherwise insert ": ". |
| 311 | SourceLocation FILoc = Tok.getLocation(); |
| 312 | const char *FIText = ": "; |
| 313 | if (FILoc.isFileID()) { |
| 314 | const SourceManager &SM = PP.getSourceManager(); |
| 315 | bool IsInvalid = false; |
| 316 | const char *SourcePtr = |
| 317 | SM.getCharacterData(FILoc.getFileLocWithOffset(-1), &IsInvalid); |
| 318 | if (!IsInvalid && *SourcePtr == ' ') { |
| 319 | SourcePtr = |
| 320 | SM.getCharacterData(FILoc.getFileLocWithOffset(-2), &IsInvalid); |
| 321 | if (!IsInvalid && *SourcePtr == ' ') { |
| 322 | FILoc = FILoc.getFileLocWithOffset(-1); |
| 323 | FIText = ":"; |
| 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
Ted Kremenek | 987aa87 | 2010-04-12 22:10:35 +0000 | [diff] [blame] | 328 | Diag(Tok, diag::err_expected_colon) |
Chris Lattner | 2472882 | 2010-05-24 22:31:37 +0000 | [diff] [blame] | 329 | << FixItHint::CreateInsertion(FILoc, FIText); |
Chris Lattner | 28eb7e9 | 2008-11-23 23:17:07 +0000 | [diff] [blame] | 330 | Diag(OpToken, diag::note_matching) << "?"; |
Chris Lattner | e5deae9 | 2010-04-20 21:33:39 +0000 | [diff] [blame] | 331 | ColonLoc = Tok.getLocation(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 332 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 333 | } |
Fariborz Jahanian | f071e9b | 2009-10-23 21:01:39 +0000 | [diff] [blame] | 334 | |
Douglas Gregor | 5ac3bdb | 2010-05-30 01:49:25 +0000 | [diff] [blame] | 335 | // Code completion for the right-hand side of an assignment expression |
| 336 | // goes through a special hook that takes the left-hand side into account. |
| 337 | if (Tok.is(tok::code_completion) && NextTokPrec == prec::Assignment) { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 338 | Actions.CodeCompleteAssignmentRHS(getCurScope(), LHS.get()); |
Douglas Gregor | 5ac3bdb | 2010-05-30 01:49:25 +0000 | [diff] [blame] | 339 | ConsumeCodeCompletionToken(); |
| 340 | return ExprError(); |
| 341 | } |
| 342 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 343 | // Parse another leaf here for the RHS of the operator. |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 344 | // ParseCastExpression works here because all RHS expressions in C have it |
| 345 | // as a prefix, at least. However, in C++, an assignment-expression could |
| 346 | // be a throw-expression, which is not a valid cast-expression. |
| 347 | // Therefore we need some special-casing here. |
| 348 | // Also note that the third operand of the conditional operator is |
| 349 | // an assignment-expression in C++. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 350 | ExprResult RHS; |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 351 | if (getLang().CPlusPlus && NextTokPrec <= prec::Conditional) |
| 352 | RHS = ParseAssignmentExpression(); |
| 353 | else |
| 354 | RHS = ParseCastExpression(false); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 355 | |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 356 | if (RHS.isInvalid()) |
| 357 | LHS = ExprError(); |
| 358 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 359 | // Remember the precedence of this operator and get the precedence of the |
| 360 | // operator immediately to the right of the RHS. |
Douglas Gregor | 6aa14d8 | 2010-04-21 22:36:40 +0000 | [diff] [blame] | 361 | prec::Level ThisPrec = NextTokPrec; |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 362 | NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 363 | getLang().CPlusPlus0x); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 364 | |
| 365 | // Assignment and conditional expressions are right-associative. |
Chris Lattner | d7d860d | 2007-12-18 06:06:23 +0000 | [diff] [blame] | 366 | bool isRightAssoc = ThisPrec == prec::Conditional || |
| 367 | ThisPrec == prec::Assignment; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 368 | |
| 369 | // Get the precedence of the operator to the right of the RHS. If it binds |
| 370 | // more tightly with RHS than we do, evaluate it completely first. |
| 371 | if (ThisPrec < NextTokPrec || |
| 372 | (ThisPrec == NextTokPrec && isRightAssoc)) { |
| 373 | // If this is left-associative, only parse things on the RHS that bind |
| 374 | // more tightly than the current operator. If it is left-associative, it |
| 375 | // is okay, to bind exactly as tightly. For example, compile A=B=C=D as |
| 376 | // A=(B=(C=D)), where each paren is a level of recursion here. |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 377 | // The function takes ownership of the RHS. |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 378 | RHS = ParseRHSOfBinaryExpression(RHS, |
Douglas Gregor | 6aa14d8 | 2010-04-21 22:36:40 +0000 | [diff] [blame] | 379 | static_cast<prec::Level>(ThisPrec + !isRightAssoc)); |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 380 | |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 381 | if (RHS.isInvalid()) |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 382 | LHS = ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 383 | |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 384 | NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 385 | getLang().CPlusPlus0x); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 386 | } |
| 387 | assert(NextTokPrec <= ThisPrec && "Recursion didn't work!"); |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 388 | |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 389 | if (!LHS.isInvalid()) { |
Chris Lattner | d56d6b6 | 2007-08-31 05:01:50 +0000 | [diff] [blame] | 390 | // Combine the LHS and RHS into the LHS (e.g. build AST). |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 391 | if (TernaryMiddle.isInvalid()) { |
| 392 | // If we're using '>>' as an operator within a template |
| 393 | // argument list (in C++98), suggest the addition of |
| 394 | // parentheses so that the code remains well-formed in C++0x. |
| 395 | if (!GreaterThanIsOperator && OpToken.is(tok::greatergreater)) |
| 396 | SuggestParentheses(OpToken.getLocation(), |
| 397 | diag::warn_cxx0x_right_shift_in_template_arg, |
| 398 | SourceRange(Actions.getExprRange(LHS.get()).getBegin(), |
| 399 | Actions.getExprRange(RHS.get()).getEnd())); |
| 400 | |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 401 | LHS = Actions.ActOnBinOp(getCurScope(), OpToken.getLocation(), |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 402 | OpToken.getKind(), LHS.take(), RHS.take()); |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 403 | } else |
Steve Naroff | f69936d | 2007-09-16 03:34:24 +0000 | [diff] [blame] | 404 | LHS = Actions.ActOnConditionalOp(OpToken.getLocation(), ColonLoc, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 405 | LHS.take(), TernaryMiddle.take(), |
| 406 | RHS.take()); |
Chris Lattner | d56d6b6 | 2007-08-31 05:01:50 +0000 | [diff] [blame] | 407 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 408 | } |
| 409 | } |
| 410 | |
| 411 | /// ParseCastExpression - Parse a cast-expression, or, if isUnaryExpression is |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 412 | /// true, parse a unary-expression. isAddressOfOperand exists because an |
| 413 | /// id-expression that is the operand of address-of gets special treatment |
| 414 | /// due to member pointers. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 415 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 416 | ExprResult Parser::ParseCastExpression(bool isUnaryExpression, |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 417 | bool isAddressOfOperand, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 418 | ParsedType TypeOfCast) { |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 419 | bool NotCastExpr; |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 420 | ExprResult Res = ParseCastExpression(isUnaryExpression, |
Douglas Gregor | 200b292 | 2010-09-17 22:25:06 +0000 | [diff] [blame^] | 421 | isAddressOfOperand, |
| 422 | NotCastExpr, |
| 423 | TypeOfCast); |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 424 | if (NotCastExpr) |
| 425 | Diag(Tok, diag::err_expected_expression); |
| 426 | return move(Res); |
| 427 | } |
| 428 | |
| 429 | /// ParseCastExpression - Parse a cast-expression, or, if isUnaryExpression is |
| 430 | /// true, parse a unary-expression. isAddressOfOperand exists because an |
| 431 | /// id-expression that is the operand of address-of gets special treatment |
| 432 | /// due to member pointers. NotCastExpr is set to true if the token is not the |
| 433 | /// start of a cast-expression, and no diagnostic is emitted in this case. |
| 434 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 435 | /// cast-expression: [C99 6.5.4] |
| 436 | /// unary-expression |
| 437 | /// '(' type-name ')' cast-expression |
| 438 | /// |
| 439 | /// unary-expression: [C99 6.5.3] |
| 440 | /// postfix-expression |
| 441 | /// '++' unary-expression |
| 442 | /// '--' unary-expression |
| 443 | /// unary-operator cast-expression |
| 444 | /// 'sizeof' unary-expression |
| 445 | /// 'sizeof' '(' type-name ')' |
| 446 | /// [GNU] '__alignof' unary-expression |
| 447 | /// [GNU] '__alignof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 448 | /// [C++0x] 'alignof' '(' type-id ')' |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 449 | /// [GNU] '&&' identifier |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 450 | /// [C++] new-expression |
| 451 | /// [C++] delete-expression |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 452 | /// [C++0x] 'noexcept' '(' expression ')' |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 453 | /// |
| 454 | /// unary-operator: one of |
| 455 | /// '&' '*' '+' '-' '~' '!' |
| 456 | /// [GNU] '__extension__' '__real' '__imag' |
| 457 | /// |
| 458 | /// primary-expression: [C99 6.5.1] |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 459 | /// [C99] identifier |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 460 | /// [C++] id-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 461 | /// constant |
| 462 | /// string-literal |
| 463 | /// [C++] boolean-literal [C++ 2.13.5] |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 464 | /// [C++0x] 'nullptr' [C++0x 2.14.7] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 465 | /// '(' expression ')' |
| 466 | /// '__func__' [C99 6.4.2.2] |
| 467 | /// [GNU] '__FUNCTION__' |
| 468 | /// [GNU] '__PRETTY_FUNCTION__' |
| 469 | /// [GNU] '(' compound-statement ')' |
| 470 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
| 471 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
| 472 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
| 473 | /// assign-expr ')' |
| 474 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
Douglas Gregor | 2d8b273 | 2008-11-29 04:51:27 +0000 | [diff] [blame] | 475 | /// [GNU] '__null' |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 476 | /// [OBJC] '[' objc-message-expr ']' |
Chris Lattner | 5ac87ed | 2008-01-25 18:58:06 +0000 | [diff] [blame] | 477 | /// [OBJC] '@selector' '(' objc-selector-arg ')' |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 478 | /// [OBJC] '@protocol' '(' identifier ')' |
| 479 | /// [OBJC] '@encode' '(' type-name ')' |
Fariborz Jahanian | 0ccb27d | 2007-09-05 19:52:07 +0000 | [diff] [blame] | 480 | /// [OBJC] objc-string-literal |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 481 | /// [C++] simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 482 | /// [C++] typename-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 483 | /// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 484 | /// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 485 | /// [C++] 'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 486 | /// [C++] 'static_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 487 | /// [C++] 'typeid' '(' expression ')' [C++ 5.2p1] |
| 488 | /// [C++] 'typeid' '(' type-id ')' [C++ 5.2p1] |
Argyrios Kyrtzidis | d7464be | 2008-07-16 07:23:27 +0000 | [diff] [blame] | 489 | /// [C++] 'this' [C++ 9.3.2] |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 490 | /// [G++] unary-type-trait '(' type-id ')' |
| 491 | /// [G++] binary-type-trait '(' type-id ',' type-id ')' [TODO] |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 492 | /// [clang] '^' block-literal |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 493 | /// |
| 494 | /// constant: [C99 6.4.4] |
| 495 | /// integer-constant |
| 496 | /// floating-constant |
| 497 | /// enumeration-constant -> identifier |
| 498 | /// character-constant |
| 499 | /// |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 500 | /// id-expression: [C++ 5.1] |
| 501 | /// unqualified-id |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 502 | /// qualified-id |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 503 | /// |
| 504 | /// unqualified-id: [C++ 5.1] |
| 505 | /// identifier |
| 506 | /// operator-function-id |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 507 | /// conversion-function-id |
| 508 | /// '~' class-name |
| 509 | /// template-id |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 510 | /// |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 511 | /// new-expression: [C++ 5.3.4] |
| 512 | /// '::'[opt] 'new' new-placement[opt] new-type-id |
| 513 | /// new-initializer[opt] |
| 514 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' |
| 515 | /// new-initializer[opt] |
| 516 | /// |
| 517 | /// delete-expression: [C++ 5.3.5] |
| 518 | /// '::'[opt] 'delete' cast-expression |
| 519 | /// '::'[opt] 'delete' '[' ']' cast-expression |
| 520 | /// |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 521 | /// [GNU] unary-type-trait: |
Sebastian Redl | c238f09 | 2010-08-31 04:59:00 +0000 | [diff] [blame] | 522 | /// '__has_nothrow_assign' |
| 523 | /// '__has_nothrow_copy' |
| 524 | /// '__has_nothrow_constructor' |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 525 | /// '__has_trivial_assign' [TODO] |
| 526 | /// '__has_trivial_copy' [TODO] |
Anders Carlsson | 347ba89 | 2009-04-16 00:08:20 +0000 | [diff] [blame] | 527 | /// '__has_trivial_constructor' |
Anders Carlsson | 072abef | 2009-04-17 02:34:54 +0000 | [diff] [blame] | 528 | /// '__has_trivial_destructor' |
Sebastian Redl | d4b25cb | 2010-09-02 23:19:42 +0000 | [diff] [blame] | 529 | /// '__has_virtual_destructor' |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 530 | /// '__is_abstract' [TODO] |
| 531 | /// '__is_class' |
| 532 | /// '__is_empty' [TODO] |
| 533 | /// '__is_enum' |
| 534 | /// '__is_pod' |
| 535 | /// '__is_polymorphic' |
| 536 | /// '__is_union' |
| 537 | /// |
| 538 | /// [GNU] binary-type-trait: |
| 539 | /// '__is_base_of' [TODO] |
| 540 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 541 | ExprResult Parser::ParseCastExpression(bool isUnaryExpression, |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 542 | bool isAddressOfOperand, |
| 543 | bool &NotCastExpr, |
| 544 | ParsedType TypeOfCast) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 545 | ExprResult Res; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 546 | tok::TokenKind SavedKind = Tok.getKind(); |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 547 | NotCastExpr = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 548 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 549 | // This handles all of cast-expression, unary-expression, postfix-expression, |
| 550 | // and primary-expression. We handle them together like this for efficiency |
| 551 | // and to simplify handling of an expression starting with a '(' token: which |
| 552 | // may be one of a parenthesized expression, cast-expression, compound literal |
| 553 | // expression, or statement expression. |
| 554 | // |
| 555 | // If the parsed tokens consist of a primary-expression, the cases below |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 556 | // break out of the switch; at the end we call ParsePostfixExpressionSuffix |
| 557 | // to handle the postfix expression suffixes. Cases that cannot be followed |
| 558 | // by postfix exprs should return without invoking |
| 559 | // ParsePostfixExpressionSuffix. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 560 | switch (SavedKind) { |
| 561 | case tok::l_paren: { |
| 562 | // If this expression is limited to being a unary-expression, the parent can |
| 563 | // not start a cast expression. |
| 564 | ParenParseOption ParenExprType = |
Douglas Gregor | d420663 | 2010-08-06 14:50:36 +0000 | [diff] [blame] | 565 | (isUnaryExpression && !getLang().CPlusPlus)? CompoundLiteral : CastExpr; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 566 | ParsedType CastTy; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 567 | SourceLocation LParenLoc = Tok.getLocation(); |
| 568 | SourceLocation RParenLoc; |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 569 | |
| 570 | { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 571 | // The inside of the parens don't need to be a colon protected scope, and |
| 572 | // isn't immediately a message send. |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 573 | ColonProtectionRAIIObject X(*this, false); |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 574 | |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 575 | Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/, |
| 576 | TypeOfCast, CastTy, RParenLoc); |
Douglas Gregor | bd6c76f | 2010-05-30 22:23:08 +0000 | [diff] [blame] | 577 | if (Res.isInvalid()) |
| 578 | return move(Res); |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 579 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 580 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 581 | switch (ParenExprType) { |
| 582 | case SimpleExpr: break; // Nothing else to do. |
| 583 | case CompoundStmt: break; // Nothing else to do. |
| 584 | case CompoundLiteral: |
| 585 | // We parsed '(' type-name ')' '{' ... '}'. If any suffixes of |
| 586 | // postfix-expression exist, parse them now. |
| 587 | break; |
| 588 | case CastExpr: |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 589 | // We have parsed the cast-expression and no postfix-expr pieces are |
| 590 | // following. |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 591 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 592 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 593 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 594 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 595 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 596 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 597 | // primary-expression |
| 598 | case tok::numeric_constant: |
| 599 | // constant: integer-constant |
| 600 | // constant: floating-constant |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 601 | |
Steve Naroff | f69936d | 2007-09-16 03:34:24 +0000 | [diff] [blame] | 602 | Res = Actions.ActOnNumericConstant(Tok); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 603 | ConsumeToken(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 604 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 605 | |
| 606 | case tok::kw_true: |
| 607 | case tok::kw_false: |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 608 | return ParseCXXBoolLiteral(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 609 | |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 610 | case tok::kw_nullptr: |
| 611 | return Actions.ActOnCXXNullPtrLiteral(ConsumeToken()); |
| 612 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 613 | case tok::identifier: { // primary-expression: identifier |
| 614 | // unqualified-id: identifier |
| 615 | // constant: enumeration-constant |
Chris Lattner | b31757b | 2009-01-06 05:06:21 +0000 | [diff] [blame] | 616 | // Turn a potentially qualified name into a annot_typename or |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 617 | // annot_cxxscope if it would be valid. This handles things like x::y, etc. |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 618 | if (getLang().CPlusPlus) { |
John McCall | b672707 | 2010-01-07 19:29:58 +0000 | [diff] [blame] | 619 | // Avoid the unnecessary parse-time lookup in the common case |
| 620 | // where the syntax forbids a type. |
| 621 | const Token &Next = NextToken(); |
| 622 | if (Next.is(tok::coloncolon) || |
| 623 | (!ColonIsSacred && Next.is(tok::colon)) || |
| 624 | Next.is(tok::less) || |
| 625 | Next.is(tok::l_paren)) { |
| 626 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
| 627 | if (TryAnnotateTypeOrScopeToken()) |
John McCall | 9ba6166 | 2010-02-26 08:45:28 +0000 | [diff] [blame] | 628 | return ExprError(); |
| 629 | if (!Tok.is(tok::identifier)) |
John McCall | b672707 | 2010-01-07 19:29:58 +0000 | [diff] [blame] | 630 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand); |
| 631 | } |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 632 | } |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 633 | |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 634 | // Consume the identifier so that we can see if it is followed by a '(' or |
| 635 | // '.'. |
| 636 | IdentifierInfo &II = *Tok.getIdentifierInfo(); |
| 637 | SourceLocation ILoc = ConsumeToken(); |
| 638 | |
Chris Lattner | eb483eb | 2010-04-11 08:28:14 +0000 | [diff] [blame] | 639 | // Support 'Class.property' and 'super.property' notation. |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 640 | if (getLang().ObjC1 && Tok.is(tok::period) && |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 641 | (Actions.getTypeName(II, ILoc, getCurScope()) || |
Chris Lattner | 236beab | 2010-04-12 06:20:33 +0000 | [diff] [blame] | 642 | // Allow the base to be 'super' if in an objc-method. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 643 | (&II == Ident_super && getCurScope()->isInObjcMethodScope()))) { |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 644 | SourceLocation DotLoc = ConsumeToken(); |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 645 | |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 646 | if (Tok.isNot(tok::identifier)) { |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 647 | Diag(Tok, diag::err_expected_property_name); |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 648 | return ExprError(); |
| 649 | } |
| 650 | IdentifierInfo &PropertyName = *Tok.getIdentifierInfo(); |
| 651 | SourceLocation PropertyLoc = ConsumeToken(); |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 652 | |
| 653 | Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName, |
| 654 | ILoc, PropertyLoc); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 655 | break; |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 656 | } |
John McCall | 9c72c60 | 2010-08-27 09:08:28 +0000 | [diff] [blame] | 657 | |
Douglas Gregor | fa885c1 | 2010-09-15 15:09:43 +0000 | [diff] [blame] | 658 | // In an Objective-C method, if we have "super" followed by an identifier, |
Douglas Gregor | 78edf51 | 2010-09-15 16:23:04 +0000 | [diff] [blame] | 659 | // the token sequence is ill-formed. However, if there's a ':' or ']' after |
Douglas Gregor | fa885c1 | 2010-09-15 15:09:43 +0000 | [diff] [blame] | 660 | // that identifier, this is probably a message send with a missing open |
Douglas Gregor | 78edf51 | 2010-09-15 16:23:04 +0000 | [diff] [blame] | 661 | // bracket. Treat it as such. |
| 662 | if (getLang().ObjC1 && &II == Ident_super && !InMessageExpression && |
Douglas Gregor | fa885c1 | 2010-09-15 15:09:43 +0000 | [diff] [blame] | 663 | getCurScope()->isInObjcMethodScope() && |
Douglas Gregor | 78edf51 | 2010-09-15 16:23:04 +0000 | [diff] [blame] | 664 | ((Tok.is(tok::identifier) && |
| 665 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) || |
| 666 | Tok.is(tok::code_completion))) { |
Douglas Gregor | fa885c1 | 2010-09-15 15:09:43 +0000 | [diff] [blame] | 667 | Res = ParseObjCMessageExpressionBody(SourceLocation(), ILoc, ParsedType(), |
| 668 | 0); |
| 669 | break; |
| 670 | } |
| 671 | |
Douglas Gregor | 9497a73 | 2010-09-16 01:51:54 +0000 | [diff] [blame] | 672 | // If we have an Objective-C class name followed by an identifier and |
| 673 | // either ':' or ']', this is an Objective-C class message send that's |
| 674 | // missing the opening '['. Recovery appropriately. |
| 675 | if (getLang().ObjC1 && Tok.is(tok::identifier)) { |
| 676 | const Token& Next = NextToken(); |
| 677 | if (Next.is(tok::colon) || Next.is(tok::r_square)) |
Gabor Greif | 9fe871a | 2010-09-17 10:21:45 +0000 | [diff] [blame] | 678 | if (ParsedType Typ = Actions.getTypeName(II, ILoc, getCurScope())) |
| 679 | if (Typ.get()->isObjCObjectOrInterfaceType()) { |
Douglas Gregor | 9497a73 | 2010-09-16 01:51:54 +0000 | [diff] [blame] | 680 | // Fake up a Declarator to use with ActOnTypeName. |
| 681 | DeclSpec DS; |
| 682 | DS.SetRangeStart(ILoc); |
| 683 | DS.SetRangeEnd(ILoc); |
| 684 | const char *PrevSpec = 0; |
| 685 | unsigned DiagID; |
Gabor Greif | 9fe871a | 2010-09-17 10:21:45 +0000 | [diff] [blame] | 686 | DS.SetTypeSpecType(TST_typename, ILoc, PrevSpec, DiagID, Typ); |
Douglas Gregor | 9497a73 | 2010-09-16 01:51:54 +0000 | [diff] [blame] | 687 | |
| 688 | Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| 689 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), |
| 690 | DeclaratorInfo); |
| 691 | if (Ty.isInvalid()) |
| 692 | break; |
| 693 | |
| 694 | Res = ParseObjCMessageExpressionBody(SourceLocation(), |
| 695 | SourceLocation(), |
| 696 | Ty.get(), 0); |
| 697 | break; |
| 698 | } |
| 699 | } |
| 700 | |
John McCall | 9c72c60 | 2010-08-27 09:08:28 +0000 | [diff] [blame] | 701 | // Make sure to pass down the right value for isAddressOfOperand. |
| 702 | if (isAddressOfOperand && isPostfixExpressionSuffixStart()) |
| 703 | isAddressOfOperand = false; |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 704 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 705 | // Function designators are allowed to be undeclared (C99 6.5.1p2), so we |
| 706 | // need to know whether or not this identifier is a function designator or |
| 707 | // not. |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 708 | UnqualifiedId Name; |
| 709 | CXXScopeSpec ScopeSpec; |
| 710 | Name.setIdentifier(&II, ILoc); |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 711 | Res = Actions.ActOnIdExpression(getCurScope(), ScopeSpec, Name, |
John McCall | 9c72c60 | 2010-08-27 09:08:28 +0000 | [diff] [blame] | 712 | Tok.is(tok::l_paren), isAddressOfOperand); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 713 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 714 | } |
| 715 | case tok::char_constant: // constant: character-constant |
Steve Naroff | f69936d | 2007-09-16 03:34:24 +0000 | [diff] [blame] | 716 | Res = Actions.ActOnCharacterConstant(Tok); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 717 | ConsumeToken(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 718 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 719 | case tok::kw___func__: // primary-expression: __func__ [C99 6.4.2.2] |
| 720 | case tok::kw___FUNCTION__: // primary-expression: __FUNCTION__ [GNU] |
| 721 | case tok::kw___PRETTY_FUNCTION__: // primary-expression: __P..Y_F..N__ [GNU] |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 722 | Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 723 | ConsumeToken(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 724 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 725 | case tok::string_literal: // primary-expression: string-literal |
| 726 | case tok::wide_string_literal: |
| 727 | Res = ParseStringLiteralExpression(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 728 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 729 | case tok::kw___builtin_va_arg: |
| 730 | case tok::kw___builtin_offsetof: |
| 731 | case tok::kw___builtin_choose_expr: |
| 732 | case tok::kw___builtin_types_compatible_p: |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 733 | return ParseBuiltinPrimaryExpression(); |
Douglas Gregor | 2d8b273 | 2008-11-29 04:51:27 +0000 | [diff] [blame] | 734 | case tok::kw___null: |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 735 | return Actions.ActOnGNUNullExpr(ConsumeToken()); |
Douglas Gregor | 2d8b273 | 2008-11-29 04:51:27 +0000 | [diff] [blame] | 736 | break; |
Douglas Gregor | d420663 | 2010-08-06 14:50:36 +0000 | [diff] [blame] | 737 | case tok::plusplus: // unary-expression: '++' unary-expression [C99] |
| 738 | case tok::minusminus: { // unary-expression: '--' unary-expression [C99] |
| 739 | // C++ [expr.unary] has: |
| 740 | // unary-expression: |
| 741 | // ++ cast-expression |
| 742 | // -- cast-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 743 | SourceLocation SavedLoc = ConsumeToken(); |
Douglas Gregor | d420663 | 2010-08-06 14:50:36 +0000 | [diff] [blame] | 744 | Res = ParseCastExpression(!getLang().CPlusPlus); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 745 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 746 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 747 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 748 | } |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 749 | case tok::amp: { // unary-expression: '&' cast-expression |
| 750 | // Special treatment because of member pointers |
| 751 | SourceLocation SavedLoc = ConsumeToken(); |
| 752 | Res = ParseCastExpression(false, true); |
| 753 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 754 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 755 | return move(Res); |
| 756 | } |
| 757 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 758 | case tok::star: // unary-expression: '*' cast-expression |
| 759 | case tok::plus: // unary-expression: '+' cast-expression |
| 760 | case tok::minus: // unary-expression: '-' cast-expression |
| 761 | case tok::tilde: // unary-expression: '~' cast-expression |
| 762 | case tok::exclaim: // unary-expression: '!' cast-expression |
| 763 | case tok::kw___real: // unary-expression: '__real' cast-expression [GNU] |
Chris Lattner | 3508084 | 2008-02-02 20:20:10 +0000 | [diff] [blame] | 764 | case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 765 | SourceLocation SavedLoc = ConsumeToken(); |
| 766 | Res = ParseCastExpression(false); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 767 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 768 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 769 | return move(Res); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 770 | } |
| 771 | |
Chris Lattner | 3508084 | 2008-02-02 20:20:10 +0000 | [diff] [blame] | 772 | case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU] |
| 773 | // __extension__ silences extension warnings in the subexpression. |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 774 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
Chris Lattner | 3508084 | 2008-02-02 20:20:10 +0000 | [diff] [blame] | 775 | SourceLocation SavedLoc = ConsumeToken(); |
| 776 | Res = ParseCastExpression(false); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 777 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 778 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 779 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 780 | } |
| 781 | case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression |
| 782 | // unary-expression: 'sizeof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 783 | case tok::kw_alignof: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 784 | case tok::kw___alignof: // unary-expression: '__alignof' unary-expression |
| 785 | // unary-expression: '__alignof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 786 | // unary-expression: 'alignof' '(' type-id ')' |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 787 | return ParseSizeofAlignofExpression(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 788 | case tok::ampamp: { // unary-expression: '&&' identifier |
| 789 | SourceLocation AmpAmpLoc = ConsumeToken(); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 790 | if (Tok.isNot(tok::identifier)) |
| 791 | return ExprError(Diag(Tok, diag::err_expected_ident)); |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 792 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 793 | Diag(AmpAmpLoc, diag::ext_gnu_address_of_label); |
Steve Naroff | 1b273c4 | 2007-09-16 14:56:35 +0000 | [diff] [blame] | 794 | Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 795 | Tok.getIdentifierInfo()); |
| 796 | ConsumeToken(); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 797 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 798 | } |
| 799 | case tok::kw_const_cast: |
| 800 | case tok::kw_dynamic_cast: |
| 801 | case tok::kw_reinterpret_cast: |
| 802 | case tok::kw_static_cast: |
Argyrios Kyrtzidis | b348b81 | 2008-08-16 19:45:32 +0000 | [diff] [blame] | 803 | Res = ParseCXXCasts(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 804 | break; |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 805 | case tok::kw_typeid: |
| 806 | Res = ParseCXXTypeid(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 807 | break; |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 808 | case tok::kw___uuidof: |
| 809 | Res = ParseCXXUuidof(); |
| 810 | break; |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 811 | case tok::kw_this: |
Argyrios Kyrtzidis | 289d773 | 2008-08-16 19:34:46 +0000 | [diff] [blame] | 812 | Res = ParseCXXThis(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 813 | break; |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 814 | |
Douglas Gregor | 9497a73 | 2010-09-16 01:51:54 +0000 | [diff] [blame] | 815 | case tok::annot_typename: |
| 816 | if (isStartOfObjCClassMessageMissingOpenBracket()) { |
| 817 | ParsedType Type = getTypeAnnotation(Tok); |
| 818 | |
| 819 | // Fake up a Declarator to use with ActOnTypeName. |
| 820 | DeclSpec DS; |
| 821 | DS.SetRangeStart(Tok.getLocation()); |
| 822 | DS.SetRangeEnd(Tok.getLastLoc()); |
| 823 | |
| 824 | const char *PrevSpec = 0; |
| 825 | unsigned DiagID; |
| 826 | DS.SetTypeSpecType(TST_typename, Tok.getLocation(), PrevSpec, DiagID, |
| 827 | Type); |
| 828 | |
| 829 | Declarator DeclaratorInfo(DS, Declarator::TypeNameContext); |
| 830 | TypeResult Ty = Actions.ActOnTypeName(getCurScope(), DeclaratorInfo); |
| 831 | if (Ty.isInvalid()) |
| 832 | break; |
| 833 | |
| 834 | ConsumeToken(); |
| 835 | Res = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
| 836 | Ty.get(), 0); |
| 837 | break; |
| 838 | } |
| 839 | // Fall through |
| 840 | |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 841 | case tok::kw_char: |
| 842 | case tok::kw_wchar_t: |
Alisdair Meredith | f5c209d | 2009-07-14 06:30:34 +0000 | [diff] [blame] | 843 | case tok::kw_char16_t: |
| 844 | case tok::kw_char32_t: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 845 | case tok::kw_bool: |
| 846 | case tok::kw_short: |
| 847 | case tok::kw_int: |
| 848 | case tok::kw_long: |
| 849 | case tok::kw_signed: |
| 850 | case tok::kw_unsigned: |
| 851 | case tok::kw_float: |
| 852 | case tok::kw_double: |
| 853 | case tok::kw_void: |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 854 | case tok::kw_typename: |
Chris Lattner | 2dcaab3 | 2009-01-04 22:28:21 +0000 | [diff] [blame] | 855 | case tok::kw_typeof: |
Douglas Gregor | 9497a73 | 2010-09-16 01:51:54 +0000 | [diff] [blame] | 856 | case tok::kw___vector: { |
Chris Lattner | 2dcaab3 | 2009-01-04 22:28:21 +0000 | [diff] [blame] | 857 | if (!getLang().CPlusPlus) { |
| 858 | Diag(Tok, diag::err_expected_expression); |
| 859 | return ExprError(); |
| 860 | } |
Eli Friedman | 2e0cdb4 | 2009-06-11 00:33:41 +0000 | [diff] [blame] | 861 | |
| 862 | if (SavedKind == tok::kw_typename) { |
| 863 | // postfix-expression: typename-specifier '(' expression-list[opt] ')' |
John McCall | 9ba6166 | 2010-02-26 08:45:28 +0000 | [diff] [blame] | 864 | if (TryAnnotateTypeOrScopeToken()) |
Eli Friedman | 2e0cdb4 | 2009-06-11 00:33:41 +0000 | [diff] [blame] | 865 | return ExprError(); |
| 866 | } |
| 867 | |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 868 | // postfix-expression: simple-type-specifier '(' expression-list[opt] ')' |
| 869 | // |
| 870 | DeclSpec DS; |
| 871 | ParseCXXSimpleTypeSpecifier(DS); |
| 872 | if (Tok.isNot(tok::l_paren)) |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 873 | return ExprError(Diag(Tok, diag::err_expected_lparen_after_type) |
| 874 | << DS.getSourceRange()); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 875 | |
| 876 | Res = ParseCXXTypeConstructExpression(DS); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 877 | break; |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 878 | } |
| 879 | |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 880 | case tok::annot_cxxscope: { // [C++] id-expression: qualified-id |
Douglas Gregor | 4074eef | 2010-04-23 02:08:13 +0000 | [diff] [blame] | 881 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
| 882 | // (We can end up in this situation after tentative parsing.) |
| 883 | if (TryAnnotateTypeOrScopeToken()) |
| 884 | return ExprError(); |
| 885 | if (!Tok.is(tok::annot_cxxscope)) |
| 886 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 887 | NotCastExpr, TypeOfCast); |
| 888 | |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 889 | Token Next = NextToken(); |
| 890 | if (Next.is(tok::annot_template_id)) { |
| 891 | TemplateIdAnnotation *TemplateId |
| 892 | = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); |
| 893 | if (TemplateId->Kind == TNK_Type_template) { |
| 894 | // We have a qualified template-id that we know refers to a |
| 895 | // type, translate it into a type and continue parsing as a |
| 896 | // cast expression. |
| 897 | CXXScopeSpec SS; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 898 | ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 899 | AnnotateTemplateIdTokenAsType(&SS); |
| 900 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 901 | NotCastExpr, TypeOfCast); |
| 902 | } |
| 903 | } |
| 904 | |
| 905 | // Parse as an id-expression. |
| 906 | Res = ParseCXXIdExpression(isAddressOfOperand); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 907 | break; |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 908 | } |
| 909 | |
| 910 | case tok::annot_template_id: { // [C++] template-id |
| 911 | TemplateIdAnnotation *TemplateId |
| 912 | = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| 913 | if (TemplateId->Kind == TNK_Type_template) { |
| 914 | // We have a template-id that we know refers to a type, |
| 915 | // translate it into a type and continue parsing as a cast |
| 916 | // expression. |
| 917 | AnnotateTemplateIdTokenAsType(); |
| 918 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 919 | NotCastExpr, TypeOfCast); |
| 920 | } |
| 921 | |
| 922 | // Fall through to treat the template-id as an id-expression. |
| 923 | } |
| 924 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 925 | case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 926 | Res = ParseCXXIdExpression(isAddressOfOperand); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 927 | break; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 928 | |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 929 | case tok::coloncolon: { |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 930 | // ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken |
| 931 | // annotates the token, tail recurse. |
| 932 | if (TryAnnotateTypeOrScopeToken()) |
John McCall | 9ba6166 | 2010-02-26 08:45:28 +0000 | [diff] [blame] | 933 | return ExprError(); |
| 934 | if (!Tok.is(tok::coloncolon)) |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 935 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand); |
| 936 | |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 937 | // ::new -> [C++] new-expression |
| 938 | // ::delete -> [C++] delete-expression |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 939 | SourceLocation CCLoc = ConsumeToken(); |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 940 | if (Tok.is(tok::kw_new)) |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 941 | return ParseCXXNewExpression(true, CCLoc); |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 942 | if (Tok.is(tok::kw_delete)) |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 943 | return ParseCXXDeleteExpression(true, CCLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 944 | |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 945 | // This is not a type name or scope specifier, it is an invalid expression. |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 946 | Diag(CCLoc, diag::err_expected_expression); |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 947 | return ExprError(); |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 948 | } |
Sebastian Redl | fb4ccd7 | 2008-12-02 16:35:44 +0000 | [diff] [blame] | 949 | |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 950 | case tok::kw_new: // [C++] new-expression |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 951 | return ParseCXXNewExpression(false, Tok.getLocation()); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 952 | |
| 953 | case tok::kw_delete: // [C++] delete-expression |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 954 | return ParseCXXDeleteExpression(false, Tok.getLocation()); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 955 | |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 956 | case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')' |
| 957 | SourceLocation KeyLoc = ConsumeToken(); |
| 958 | SourceLocation LParen = Tok.getLocation(); |
| 959 | if (ExpectAndConsume(tok::l_paren, |
| 960 | diag::err_expected_lparen_after, "noexcept")) |
| 961 | return ExprError(); |
Sebastian Redl | bd7c849 | 2010-09-10 21:57:27 +0000 | [diff] [blame] | 962 | // C++ [expr.unary.noexcept]p1: |
| 963 | // The noexcept operator determines whether the evaluation of its operand, |
| 964 | // which is an unevaluated operand, can throw an exception. |
| 965 | EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated); |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 966 | ExprResult Result = ParseExpression(); |
| 967 | SourceLocation RParen = MatchRHSPunctuation(tok::r_paren, LParen); |
| 968 | if (!Result.isInvalid()) |
| 969 | Result = Actions.ActOnNoexceptExpr(KeyLoc, LParen, Result.take(), RParen); |
| 970 | return move(Result); |
| 971 | } |
| 972 | |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 973 | case tok::kw___is_pod: // [GNU] unary-type-trait |
| 974 | case tok::kw___is_class: |
| 975 | case tok::kw___is_enum: |
| 976 | case tok::kw___is_union: |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 977 | case tok::kw___is_empty: |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 978 | case tok::kw___is_polymorphic: |
Anders Carlsson | 67e4dd2 | 2009-03-22 01:52:17 +0000 | [diff] [blame] | 979 | case tok::kw___is_abstract: |
Sebastian Redl | ccf4350 | 2009-12-03 00:13:20 +0000 | [diff] [blame] | 980 | case tok::kw___is_literal: |
Anders Carlsson | 347ba89 | 2009-04-16 00:08:20 +0000 | [diff] [blame] | 981 | case tok::kw___has_trivial_constructor: |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 982 | case tok::kw___has_trivial_copy: |
| 983 | case tok::kw___has_trivial_assign: |
Anders Carlsson | 072abef | 2009-04-17 02:34:54 +0000 | [diff] [blame] | 984 | case tok::kw___has_trivial_destructor: |
Sebastian Redl | c238f09 | 2010-08-31 04:59:00 +0000 | [diff] [blame] | 985 | case tok::kw___has_nothrow_assign: |
| 986 | case tok::kw___has_nothrow_copy: |
| 987 | case tok::kw___has_nothrow_constructor: |
Sebastian Redl | d4b25cb | 2010-09-02 23:19:42 +0000 | [diff] [blame] | 988 | case tok::kw___has_virtual_destructor: |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 989 | return ParseUnaryTypeTrait(); |
| 990 | |
Chris Lattner | c97c204 | 2007-10-03 22:03:06 +0000 | [diff] [blame] | 991 | case tok::at: { |
| 992 | SourceLocation AtLoc = ConsumeToken(); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 993 | return ParseObjCAtExpression(AtLoc); |
Chris Lattner | c97c204 | 2007-10-03 22:03:06 +0000 | [diff] [blame] | 994 | } |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 995 | case tok::caret: |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 996 | return ParsePostfixExpressionSuffix(ParseBlockLiteralExpression()); |
Douglas Gregor | 64538cf | 2010-04-06 15:09:27 +0000 | [diff] [blame] | 997 | case tok::code_completion: |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 998 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Expression); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 999 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 64538cf | 2010-04-06 15:09:27 +0000 | [diff] [blame] | 1000 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 1001 | NotCastExpr, TypeOfCast); |
Chris Lattner | fdb548e | 2008-12-12 19:20:14 +0000 | [diff] [blame] | 1002 | case tok::l_square: |
| 1003 | // These can be followed by postfix-expr pieces. |
| 1004 | if (getLang().ObjC1) |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1005 | return ParsePostfixExpressionSuffix(ParseObjCMessageExpression()); |
Douglas Gregor | 64538cf | 2010-04-06 15:09:27 +0000 | [diff] [blame] | 1006 | // FALL THROUGH. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1007 | default: |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1008 | NotCastExpr = true; |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1009 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1010 | } |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1011 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1012 | // These can be followed by postfix-expr pieces. |
| 1013 | if (Res.isInvalid()) return move(Res); |
| 1014 | return ParsePostfixExpressionSuffix(Res.get()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1015 | } |
| 1016 | |
| 1017 | /// ParsePostfixExpressionSuffix - Once the leading part of a postfix-expression |
| 1018 | /// is parsed, this method parses any suffixes that apply. |
| 1019 | /// |
| 1020 | /// postfix-expression: [C99 6.5.2] |
| 1021 | /// primary-expression |
| 1022 | /// postfix-expression '[' expression ']' |
| 1023 | /// postfix-expression '(' argument-expression-list[opt] ')' |
| 1024 | /// postfix-expression '.' identifier |
| 1025 | /// postfix-expression '->' identifier |
| 1026 | /// postfix-expression '++' |
| 1027 | /// postfix-expression '--' |
| 1028 | /// '(' type-name ')' '{' initializer-list '}' |
| 1029 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 1030 | /// |
| 1031 | /// argument-expression-list: [C99 6.5.2] |
| 1032 | /// argument-expression |
| 1033 | /// argument-expression-list ',' assignment-expression |
| 1034 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1035 | ExprResult |
| 1036 | Parser::ParsePostfixExpressionSuffix(ExprResult LHS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1037 | // Now that the primary-expression piece of the postfix-expression has been |
| 1038 | // parsed, see if there are any postfix-expression pieces here. |
| 1039 | SourceLocation Loc; |
| 1040 | while (1) { |
| 1041 | switch (Tok.getKind()) { |
Douglas Gregor | 78edf51 | 2010-09-15 16:23:04 +0000 | [diff] [blame] | 1042 | case tok::code_completion: |
| 1043 | if (InMessageExpression) |
| 1044 | return move(LHS); |
| 1045 | |
| 1046 | Actions.CodeCompletePostfixExpression(getCurScope(), LHS.take()); |
| 1047 | ConsumeCodeCompletionToken(); |
| 1048 | LHS = ExprError(); |
| 1049 | break; |
| 1050 | |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1051 | case tok::identifier: |
| 1052 | // If we see identifier: after an expression, and we're not already in a |
| 1053 | // message send, then this is probably a message send with a missing |
| 1054 | // opening bracket '['. |
| 1055 | if (getLang().ObjC1 && !InMessageExpression && |
Douglas Gregor | b65042d | 2010-09-15 14:54:45 +0000 | [diff] [blame] | 1056 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1057 | LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
| 1058 | ParsedType(), LHS.get()); |
| 1059 | break; |
| 1060 | } |
| 1061 | |
| 1062 | // Fall through; this isn't a message send. |
| 1063 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1064 | default: // Not a postfix-expression suffix. |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1065 | return move(LHS); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1066 | case tok::l_square: { // postfix-expression: p-e '[' expression ']' |
Chris Lattner | c59cb38 | 2010-05-31 18:18:22 +0000 | [diff] [blame] | 1067 | // If we have a array postfix expression that starts on a new line and |
| 1068 | // Objective-C is enabled, it is highly likely that the user forgot a |
| 1069 | // semicolon after the base expression and that the array postfix-expr is |
| 1070 | // actually another message send. In this case, do some look-ahead to see |
| 1071 | // if the contents of the square brackets are obviously not a valid |
| 1072 | // expression and recover by pretending there is no suffix. |
| 1073 | if (getLang().ObjC1 && Tok.isAtStartOfLine() && |
| 1074 | isSimpleObjCMessageExpression()) |
Douglas Gregor | 1b730e8 | 2010-05-31 14:40:22 +0000 | [diff] [blame] | 1075 | return move(LHS); |
| 1076 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1077 | Loc = ConsumeBracket(); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1078 | ExprResult Idx(ParseExpression()); |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1079 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1080 | SourceLocation RLoc = Tok.getLocation(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1081 | |
| 1082 | if (!LHS.isInvalid() && !Idx.isInvalid() && Tok.is(tok::r_square)) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1083 | LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.take(), Loc, |
| 1084 | Idx.take(), RLoc); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1085 | } else |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1086 | LHS = ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1087 | |
| 1088 | // Match the ']'. |
| 1089 | MatchRHSPunctuation(tok::r_square, Loc); |
| 1090 | break; |
| 1091 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1092 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1093 | case tok::l_paren: { // p-e: p-e '(' argument-expression-list[opt] ')' |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1094 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1095 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1096 | ExprVector ArgExprs(Actions); |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1097 | CommaLocsTy CommaLocs; |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1098 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1099 | Loc = ConsumeParen(); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1100 | |
Douglas Gregor | bd6c76f | 2010-05-30 22:23:08 +0000 | [diff] [blame] | 1101 | if (LHS.isInvalid()) { |
| 1102 | SkipUntil(tok::r_paren); |
| 1103 | return ExprError(); |
| 1104 | } |
| 1105 | |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1106 | if (Tok.is(tok::code_completion)) { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1107 | Actions.CodeCompleteCall(getCurScope(), LHS.get(), 0, 0); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 1108 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1109 | } |
| 1110 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1111 | if (Tok.isNot(tok::r_paren)) { |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1112 | if (ParseExpressionList(ArgExprs, CommaLocs, &Sema::CodeCompleteCall, |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1113 | LHS.get())) { |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1114 | SkipUntil(tok::r_paren); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1115 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1116 | } |
| 1117 | } |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1118 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1119 | // Match the ')'. |
Chris Lattner | 1721a2d | 2009-04-13 00:10:38 +0000 | [diff] [blame] | 1120 | if (Tok.isNot(tok::r_paren)) { |
| 1121 | MatchRHSPunctuation(tok::r_paren, Loc); |
| 1122 | return ExprError(); |
| 1123 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1124 | |
Chris Lattner | 1721a2d | 2009-04-13 00:10:38 +0000 | [diff] [blame] | 1125 | if (!LHS.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1126 | assert((ArgExprs.size() == 0 || ArgExprs.size()-1 == CommaLocs.size())&& |
| 1127 | "Unexpected number of commas!"); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1128 | LHS = Actions.ActOnCallExpr(getCurScope(), LHS.take(), Loc, |
Douglas Gregor | a1a0478 | 2010-09-09 16:33:13 +0000 | [diff] [blame] | 1129 | move_arg(ArgExprs), Tok.getLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1130 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1131 | |
Chris Lattner | 1721a2d | 2009-04-13 00:10:38 +0000 | [diff] [blame] | 1132 | ConsumeParen(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1133 | break; |
| 1134 | } |
Douglas Gregor | 3b6afbb | 2009-09-09 00:23:06 +0000 | [diff] [blame] | 1135 | case tok::arrow: |
| 1136 | case tok::period: { |
| 1137 | // postfix-expression: p-e '->' template[opt] id-expression |
| 1138 | // postfix-expression: p-e '.' template[opt] id-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1139 | tok::TokenKind OpKind = Tok.getKind(); |
| 1140 | SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token. |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1141 | |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1142 | CXXScopeSpec SS; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1143 | ParsedType ObjectType; |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1144 | bool MayBePseudoDestructor = false; |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1145 | if (getLang().CPlusPlus && !LHS.isInvalid()) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1146 | LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), LHS.take(), |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1147 | OpLoc, OpKind, ObjectType, |
| 1148 | MayBePseudoDestructor); |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1149 | if (LHS.isInvalid()) |
| 1150 | break; |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1151 | |
Douglas Gregor | edc9050 | 2010-02-25 04:46:04 +0000 | [diff] [blame] | 1152 | ParseOptionalCXXScopeSpecifier(SS, ObjectType, false, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1153 | &MayBePseudoDestructor); |
Douglas Gregor | 9f716e4 | 2010-05-27 15:25:59 +0000 | [diff] [blame] | 1154 | if (SS.isNotEmpty()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1155 | ObjectType = ParsedType(); |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1156 | } |
| 1157 | |
Douglas Gregor | 81b747b | 2009-09-17 21:32:03 +0000 | [diff] [blame] | 1158 | if (Tok.is(tok::code_completion)) { |
| 1159 | // Code completion for a member access expression. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1160 | Actions.CodeCompleteMemberReferenceExpr(getCurScope(), LHS.get(), |
Douglas Gregor | 81b747b | 2009-09-17 21:32:03 +0000 | [diff] [blame] | 1161 | OpLoc, OpKind == tok::arrow); |
| 1162 | |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 1163 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 81b747b | 2009-09-17 21:32:03 +0000 | [diff] [blame] | 1164 | } |
| 1165 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1166 | if (MayBePseudoDestructor && !LHS.isInvalid()) { |
| 1167 | LHS = ParseCXXPseudoDestructor(LHS.take(), OpLoc, OpKind, SS, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1168 | ObjectType); |
| 1169 | break; |
| 1170 | } |
| 1171 | |
| 1172 | // Either the action has told is that this cannot be a |
| 1173 | // pseudo-destructor expression (based on the type of base |
| 1174 | // expression), or we didn't see a '~' in the right place. We |
| 1175 | // can still parse a destructor name here, but in that case it |
| 1176 | // names a real destructor. |
Douglas Gregor | 2d1c214 | 2009-11-03 19:44:04 +0000 | [diff] [blame] | 1177 | UnqualifiedId Name; |
| 1178 | if (ParseUnqualifiedId(SS, |
| 1179 | /*EnteringContext=*/false, |
| 1180 | /*AllowDestructorName=*/true, |
| 1181 | /*AllowConstructorName=*/false, |
| 1182 | ObjectType, |
| 1183 | Name)) |
| 1184 | return ExprError(); |
| 1185 | |
| 1186 | if (!LHS.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1187 | LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.take(), OpLoc, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1188 | OpKind, SS, Name, ObjCImpDecl, |
Douglas Gregor | 2d1c214 | 2009-11-03 19:44:04 +0000 | [diff] [blame] | 1189 | Tok.is(tok::l_paren)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1190 | break; |
| 1191 | } |
| 1192 | case tok::plusplus: // postfix-expression: postfix-expression '++' |
| 1193 | case tok::minusminus: // postfix-expression: postfix-expression '--' |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1194 | if (!LHS.isInvalid()) { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1195 | LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(), |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1196 | Tok.getKind(), LHS.take()); |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1197 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1198 | ConsumeToken(); |
| 1199 | break; |
| 1200 | } |
| 1201 | } |
| 1202 | } |
| 1203 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1204 | /// ParseExprAfterTypeofSizeofAlignof - We parsed a typeof/sizeof/alignof and |
| 1205 | /// we are at the start of an expression or a parenthesized type-id. |
| 1206 | /// OpTok is the operand token (typeof/sizeof/alignof). Returns the expression |
| 1207 | /// (isCastExpr == false) or the type (isCastExpr == true). |
| 1208 | /// |
| 1209 | /// unary-expression: [C99 6.5.3] |
| 1210 | /// 'sizeof' unary-expression |
| 1211 | /// 'sizeof' '(' type-name ')' |
| 1212 | /// [GNU] '__alignof' unary-expression |
| 1213 | /// [GNU] '__alignof' '(' type-name ')' |
| 1214 | /// [C++0x] 'alignof' '(' type-id ')' |
| 1215 | /// |
| 1216 | /// [GNU] typeof-specifier: |
| 1217 | /// typeof ( expressions ) |
| 1218 | /// typeof ( type-name ) |
| 1219 | /// [GNU/C++] typeof unary-expression |
| 1220 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1221 | ExprResult |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1222 | Parser::ParseExprAfterTypeofSizeofAlignof(const Token &OpTok, |
| 1223 | bool &isCastExpr, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1224 | ParsedType &CastTy, |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1225 | SourceRange &CastRange) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1226 | |
| 1227 | assert((OpTok.is(tok::kw_typeof) || OpTok.is(tok::kw_sizeof) || |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1228 | OpTok.is(tok::kw___alignof) || OpTok.is(tok::kw_alignof)) && |
| 1229 | "Not a typeof/sizeof/alignof expression!"); |
| 1230 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1231 | ExprResult Operand; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1232 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1233 | // If the operand doesn't start with an '(', it must be an expression. |
| 1234 | if (Tok.isNot(tok::l_paren)) { |
| 1235 | isCastExpr = false; |
| 1236 | if (OpTok.is(tok::kw_typeof) && !getLang().CPlusPlus) { |
| 1237 | Diag(Tok,diag::err_expected_lparen_after_id) << OpTok.getIdentifierInfo(); |
| 1238 | return ExprError(); |
| 1239 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1240 | |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1241 | // C++0x [expr.sizeof]p1: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1242 | // [...] The operand is either an expression, which is an unevaluated |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1243 | // operand (Clause 5) [...] |
| 1244 | // |
| 1245 | // The GNU typeof and alignof extensions also behave as unevaluated |
| 1246 | // operands. |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 1247 | EnterExpressionEvaluationContext Unevaluated(Actions, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1248 | Sema::Unevaluated); |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1249 | Operand = ParseCastExpression(true/*isUnaryExpression*/); |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1250 | } else { |
| 1251 | // If it starts with a '(', we know that it is either a parenthesized |
| 1252 | // type-name, or it is a unary-expression that starts with a compound |
| 1253 | // literal, or starts with a primary-expression that is a parenthesized |
| 1254 | // expression. |
| 1255 | ParenParseOption ExprType = CastExpr; |
| 1256 | SourceLocation LParenLoc = Tok.getLocation(), RParenLoc; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1257 | |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1258 | // C++0x [expr.sizeof]p1: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1259 | // [...] The operand is either an expression, which is an unevaluated |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1260 | // operand (Clause 5) [...] |
| 1261 | // |
| 1262 | // The GNU typeof and alignof extensions also behave as unevaluated |
| 1263 | // operands. |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 1264 | EnterExpressionEvaluationContext Unevaluated(Actions, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1265 | Sema::Unevaluated); |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1266 | Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1267 | ParsedType(), CastTy, RParenLoc); |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1268 | CastRange = SourceRange(LParenLoc, RParenLoc); |
| 1269 | |
| 1270 | // If ParseParenExpression parsed a '(typename)' sequence only, then this is |
| 1271 | // a type. |
| 1272 | if (ExprType == CastExpr) { |
| 1273 | isCastExpr = true; |
| 1274 | return ExprEmpty(); |
| 1275 | } |
| 1276 | |
Douglas Gregor | 2a3a1bd | 2010-07-28 18:22:12 +0000 | [diff] [blame] | 1277 | if (getLang().CPlusPlus || OpTok.isNot(tok::kw_typeof)) { |
| 1278 | // GNU typeof in C requires the expression to be parenthesized. Not so for |
| 1279 | // sizeof/alignof or in C++. Therefore, the parenthesized expression is |
| 1280 | // the start of a unary-expression, but doesn't include any postfix |
| 1281 | // pieces. Parse these now if present. |
John McCall | 124300e | 2010-08-24 23:41:43 +0000 | [diff] [blame] | 1282 | if (!Operand.isInvalid()) |
| 1283 | Operand = ParsePostfixExpressionSuffix(Operand.get()); |
Douglas Gregor | 2a3a1bd | 2010-07-28 18:22:12 +0000 | [diff] [blame] | 1284 | } |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1285 | } |
| 1286 | |
| 1287 | // If we get here, the operand to the typeof/sizeof/alignof was an expresion. |
| 1288 | isCastExpr = false; |
| 1289 | return move(Operand); |
| 1290 | } |
| 1291 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1292 | |
| 1293 | /// ParseSizeofAlignofExpression - Parse a sizeof or alignof expression. |
| 1294 | /// unary-expression: [C99 6.5.3] |
| 1295 | /// 'sizeof' unary-expression |
| 1296 | /// 'sizeof' '(' type-name ')' |
| 1297 | /// [GNU] '__alignof' unary-expression |
| 1298 | /// [GNU] '__alignof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 1299 | /// [C++0x] 'alignof' '(' type-id ')' |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1300 | ExprResult Parser::ParseSizeofAlignofExpression() { |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 1301 | assert((Tok.is(tok::kw_sizeof) || Tok.is(tok::kw___alignof) |
| 1302 | || Tok.is(tok::kw_alignof)) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1303 | "Not a sizeof/alignof expression!"); |
Chris Lattner | d217773 | 2007-07-20 16:59:19 +0000 | [diff] [blame] | 1304 | Token OpTok = Tok; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1305 | ConsumeToken(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1306 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1307 | bool isCastExpr; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1308 | ParsedType CastTy; |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1309 | SourceRange CastRange; |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1310 | ExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1311 | isCastExpr, |
| 1312 | CastTy, |
| 1313 | CastRange); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1314 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1315 | if (isCastExpr) |
| 1316 | return Actions.ActOnSizeOfAlignOfExpr(OpTok.getLocation(), |
| 1317 | OpTok.is(tok::kw_sizeof), |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1318 | /*isType=*/true, |
| 1319 | CastTy.getAsOpaquePtr(), |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1320 | CastRange); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1321 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1322 | // If we get here, the operand to the sizeof/alignof was an expresion. |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1323 | if (!Operand.isInvalid()) |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1324 | Operand = Actions.ActOnSizeOfAlignOfExpr(OpTok.getLocation(), |
| 1325 | OpTok.is(tok::kw_sizeof), |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 1326 | /*isType=*/false, |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1327 | Operand.release(), CastRange); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1328 | return move(Operand); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1329 | } |
| 1330 | |
| 1331 | /// ParseBuiltinPrimaryExpression |
| 1332 | /// |
| 1333 | /// primary-expression: [C99 6.5.1] |
| 1334 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
| 1335 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
| 1336 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
| 1337 | /// assign-expr ')' |
| 1338 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1339 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1340 | /// [GNU] offsetof-member-designator: |
| 1341 | /// [GNU] identifier |
| 1342 | /// [GNU] offsetof-member-designator '.' identifier |
| 1343 | /// [GNU] offsetof-member-designator '[' expression ']' |
| 1344 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1345 | ExprResult Parser::ParseBuiltinPrimaryExpression() { |
| 1346 | ExprResult Res; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1347 | const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo(); |
| 1348 | |
| 1349 | tok::TokenKind T = Tok.getKind(); |
| 1350 | SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier. |
| 1351 | |
| 1352 | // All of these start with an open paren. |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1353 | if (Tok.isNot(tok::l_paren)) |
| 1354 | return ExprError(Diag(Tok, diag::err_expected_lparen_after_id) |
| 1355 | << BuiltinII); |
| 1356 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1357 | SourceLocation LParenLoc = ConsumeParen(); |
| 1358 | // TODO: Build AST. |
| 1359 | |
| 1360 | switch (T) { |
| 1361 | default: assert(0 && "Not a builtin primary expression!"); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1362 | case tok::kw___builtin_va_arg: { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1363 | ExprResult Expr(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1364 | if (Expr.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1365 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1366 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1367 | } |
| 1368 | |
| 1369 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1370 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1371 | |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1372 | TypeResult Ty = ParseTypeName(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1373 | |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1374 | if (Tok.isNot(tok::r_paren)) { |
| 1375 | Diag(Tok, diag::err_expected_rparen); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1376 | return ExprError(); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1377 | } |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1378 | if (Ty.isInvalid()) |
| 1379 | Res = ExprError(); |
| 1380 | else |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1381 | Res = Actions.ActOnVAArg(StartLoc, Expr.take(), Ty.get(), ConsumeParen()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1382 | break; |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1383 | } |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1384 | case tok::kw___builtin_offsetof: { |
Chris Lattner | 9fddf0a | 2007-08-30 17:08:45 +0000 | [diff] [blame] | 1385 | SourceLocation TypeLoc = Tok.getLocation(); |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1386 | TypeResult Ty = ParseTypeName(); |
Chris Lattner | ca7102c | 2009-03-24 17:21:43 +0000 | [diff] [blame] | 1387 | if (Ty.isInvalid()) { |
| 1388 | SkipUntil(tok::r_paren); |
| 1389 | return ExprError(); |
| 1390 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1391 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1392 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1393 | return ExprError(); |
| 1394 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1395 | // We must have at least one identifier here. |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1396 | if (Tok.isNot(tok::identifier)) { |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1397 | Diag(Tok, diag::err_expected_ident); |
| 1398 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1399 | return ExprError(); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1400 | } |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1401 | |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1402 | // Keep track of the various subcomponents we see. |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1403 | llvm::SmallVector<Sema::OffsetOfComponent, 4> Comps; |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1404 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1405 | Comps.push_back(Sema::OffsetOfComponent()); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1406 | Comps.back().isBrackets = false; |
| 1407 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
| 1408 | Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1409 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1410 | // FIXME: This loop leaks the index expressions on error. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1411 | while (1) { |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1412 | if (Tok.is(tok::period)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1413 | // offsetof-member-designator: offsetof-member-designator '.' identifier |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1414 | Comps.push_back(Sema::OffsetOfComponent()); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1415 | Comps.back().isBrackets = false; |
| 1416 | Comps.back().LocStart = ConsumeToken(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1417 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1418 | if (Tok.isNot(tok::identifier)) { |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1419 | Diag(Tok, diag::err_expected_ident); |
| 1420 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1421 | return ExprError(); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1422 | } |
| 1423 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
| 1424 | Comps.back().LocEnd = ConsumeToken(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1425 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1426 | } else if (Tok.is(tok::l_square)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1427 | // offsetof-member-designator: offsetof-member-design '[' expression ']' |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1428 | Comps.push_back(Sema::OffsetOfComponent()); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1429 | Comps.back().isBrackets = true; |
| 1430 | Comps.back().LocStart = ConsumeBracket(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1431 | Res = ParseExpression(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1432 | if (Res.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1433 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1434 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1435 | } |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 1436 | Comps.back().U.E = Res.release(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1437 | |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1438 | Comps.back().LocEnd = |
| 1439 | MatchRHSPunctuation(tok::r_square, Comps.back().LocStart); |
Eli Friedman | 309fe0d | 2009-06-27 20:38:33 +0000 | [diff] [blame] | 1440 | } else { |
| 1441 | if (Tok.isNot(tok::r_paren)) { |
| 1442 | MatchRHSPunctuation(tok::r_paren, LParenLoc); |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1443 | Res = ExprError(); |
Eli Friedman | 309fe0d | 2009-06-27 20:38:33 +0000 | [diff] [blame] | 1444 | } else if (Ty.isInvalid()) { |
| 1445 | Res = ExprError(); |
| 1446 | } else { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1447 | Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1448 | Ty.get(), &Comps[0], |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1449 | Comps.size(), ConsumeParen()); |
Eli Friedman | 309fe0d | 2009-06-27 20:38:33 +0000 | [diff] [blame] | 1450 | } |
Chris Lattner | 6eb2109 | 2007-08-30 15:52:49 +0000 | [diff] [blame] | 1451 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1452 | } |
| 1453 | } |
| 1454 | break; |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1455 | } |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1456 | case tok::kw___builtin_choose_expr: { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1457 | ExprResult Cond(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1458 | if (Cond.isInvalid()) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1459 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1460 | return move(Cond); |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1461 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1462 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1463 | return ExprError(); |
| 1464 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1465 | ExprResult Expr1(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1466 | if (Expr1.isInvalid()) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1467 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1468 | return move(Expr1); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1469 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1470 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1471 | return ExprError(); |
| 1472 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1473 | ExprResult Expr2(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1474 | if (Expr2.isInvalid()) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1475 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1476 | return move(Expr2); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1477 | } |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1478 | if (Tok.isNot(tok::r_paren)) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1479 | Diag(Tok, diag::err_expected_rparen); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1480 | return ExprError(); |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1481 | } |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1482 | Res = Actions.ActOnChooseExpr(StartLoc, Cond.take(), Expr1.take(), |
| 1483 | Expr2.take(), ConsumeParen()); |
Chris Lattner | 6eb2109 | 2007-08-30 15:52:49 +0000 | [diff] [blame] | 1484 | break; |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1485 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1486 | case tok::kw___builtin_types_compatible_p: |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1487 | TypeResult Ty1 = ParseTypeName(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1488 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1489 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1490 | return ExprError(); |
| 1491 | |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1492 | TypeResult Ty2 = ParseTypeName(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1493 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1494 | if (Tok.isNot(tok::r_paren)) { |
Steve Naroff | 363bcff | 2007-08-01 23:45:51 +0000 | [diff] [blame] | 1495 | Diag(Tok, diag::err_expected_rparen); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1496 | return ExprError(); |
Steve Naroff | 363bcff | 2007-08-01 23:45:51 +0000 | [diff] [blame] | 1497 | } |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1498 | |
| 1499 | if (Ty1.isInvalid() || Ty2.isInvalid()) |
| 1500 | Res = ExprError(); |
| 1501 | else |
| 1502 | Res = Actions.ActOnTypesCompatibleExpr(StartLoc, Ty1.get(), Ty2.get(), |
| 1503 | ConsumeParen()); |
Chris Lattner | 6eb2109 | 2007-08-30 15:52:49 +0000 | [diff] [blame] | 1504 | break; |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1505 | } |
| 1506 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1507 | if (Res.isInvalid()) |
| 1508 | return ExprError(); |
| 1509 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1510 | // These can be followed by postfix-expr pieces because they are |
| 1511 | // primary-expressions. |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1512 | return ParsePostfixExpressionSuffix(Res.take()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1513 | } |
| 1514 | |
| 1515 | /// ParseParenExpression - This parses the unit that starts with a '(' token, |
| 1516 | /// based on what is allowed by ExprType. The actual thing parsed is returned |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1517 | /// in ExprType. If stopIfCastExpr is true, it will only return the parsed type, |
| 1518 | /// not the parsed cast-expression. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1519 | /// |
| 1520 | /// primary-expression: [C99 6.5.1] |
| 1521 | /// '(' expression ')' |
| 1522 | /// [GNU] '(' compound-statement ')' (if !ParenExprOnly) |
| 1523 | /// postfix-expression: [C99 6.5.2] |
| 1524 | /// '(' type-name ')' '{' initializer-list '}' |
| 1525 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 1526 | /// cast-expression: [C99 6.5.4] |
| 1527 | /// '(' type-name ')' cast-expression |
| 1528 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1529 | ExprResult |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1530 | Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1531 | ParsedType TypeOfCast, ParsedType &CastTy, |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1532 | SourceLocation &RParenLoc) { |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1533 | assert(Tok.is(tok::l_paren) && "Not a paren expr!"); |
Douglas Gregor | f02da89 | 2009-02-09 21:04:56 +0000 | [diff] [blame] | 1534 | GreaterThanIsOperatorScope G(GreaterThanIsOperator, true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1535 | SourceLocation OpenLoc = ConsumeParen(); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1536 | ExprResult Result(true); |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1537 | bool isAmbiguousTypeId; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1538 | CastTy = ParsedType(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1539 | |
Douglas Gregor | 0268810 | 2010-09-14 23:59:36 +0000 | [diff] [blame] | 1540 | if (Tok.is(tok::code_completion)) { |
| 1541 | Actions.CodeCompleteOrdinaryName(getCurScope(), |
| 1542 | ExprType >= CompoundLiteral? Sema::PCC_ParenthesizedExpression |
| 1543 | : Sema::PCC_Expression); |
| 1544 | ConsumeCodeCompletionToken(); |
| 1545 | return ExprError(); |
| 1546 | } |
| 1547 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1548 | if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1549 | Diag(Tok, diag::ext_gnu_statement_expr); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1550 | StmtResult Stmt(ParseCompoundStatement(0, true)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1551 | ExprType = CompoundStmt; |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1552 | |
Chris Lattner | ab18c4c | 2007-07-24 16:58:17 +0000 | [diff] [blame] | 1553 | // If the substmt parsed correctly, build the AST node. |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1554 | if (!Stmt.isInvalid() && Tok.is(tok::r_paren)) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1555 | Result = Actions.ActOnStmtExpr(OpenLoc, Stmt.take(), Tok.getLocation()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1556 | |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1557 | } else if (ExprType >= CompoundLiteral && |
| 1558 | isTypeIdInParens(isAmbiguousTypeId)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1559 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1560 | // Otherwise, this is a compound literal expression or cast expression. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1561 | |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1562 | // In C++, if the type-id is ambiguous we disambiguate based on context. |
| 1563 | // If stopIfCastExpr is true the context is a typeof/sizeof/alignof |
| 1564 | // in which case we should treat it as type-id. |
| 1565 | // if stopIfCastExpr is false, we need to determine the context past the |
| 1566 | // parens, so we defer to ParseCXXAmbiguousParenExpression for that. |
| 1567 | if (isAmbiguousTypeId && !stopIfCastExpr) |
| 1568 | return ParseCXXAmbiguousParenExpression(ExprType, CastTy, |
| 1569 | OpenLoc, RParenLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1570 | |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1571 | TypeResult Ty; |
| 1572 | |
| 1573 | { |
| 1574 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1575 | Ty = ParseTypeName(); |
| 1576 | } |
| 1577 | |
Douglas Gregor | 77328d1 | 2010-09-15 23:19:31 +0000 | [diff] [blame] | 1578 | // If our type is followed by an identifier and either ':' or ']', then |
| 1579 | // this is probably an Objective-C message send where the leading '[' is |
| 1580 | // missing. Recover as if that were the case. |
| 1581 | if (!Ty.isInvalid() && Tok.is(tok::identifier) && !InMessageExpression && |
| 1582 | getLang().ObjC1 && !Ty.get().get().isNull() && |
| 1583 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square)) && |
| 1584 | Ty.get().get()->isObjCObjectOrInterfaceType()) { |
| 1585 | Result = ParseObjCMessageExpressionBody(SourceLocation(), |
| 1586 | SourceLocation(), |
| 1587 | Ty.get(), 0); |
| 1588 | } else { |
| 1589 | // Match the ')'. |
| 1590 | if (Tok.is(tok::r_paren)) |
| 1591 | RParenLoc = ConsumeParen(); |
| 1592 | else |
| 1593 | MatchRHSPunctuation(tok::r_paren, OpenLoc); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1594 | |
Douglas Gregor | 77328d1 | 2010-09-15 23:19:31 +0000 | [diff] [blame] | 1595 | if (Tok.is(tok::l_brace)) { |
| 1596 | ExprType = CompoundLiteral; |
| 1597 | return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc); |
Chris Lattner | eb483eb | 2010-04-11 08:28:14 +0000 | [diff] [blame] | 1598 | } |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1599 | |
Douglas Gregor | 77328d1 | 2010-09-15 23:19:31 +0000 | [diff] [blame] | 1600 | if (ExprType == CastExpr) { |
| 1601 | // We parsed '(' type-name ')' and the thing after it wasn't a '{'. |
Sebastian Redl | b8a6aca | 2009-01-19 22:31:54 +0000 | [diff] [blame] | 1602 | |
Douglas Gregor | 77328d1 | 2010-09-15 23:19:31 +0000 | [diff] [blame] | 1603 | if (Ty.isInvalid()) |
| 1604 | return ExprError(); |
| 1605 | |
| 1606 | CastTy = Ty.get(); |
| 1607 | |
| 1608 | // Note that this doesn't parse the subsequent cast-expression, it just |
| 1609 | // returns the parsed type to the callee. |
| 1610 | if (stopIfCastExpr) |
| 1611 | return ExprResult(); |
| 1612 | |
| 1613 | // Reject the cast of super idiom in ObjC. |
| 1614 | if (Tok.is(tok::identifier) && getLang().ObjC1 && |
| 1615 | Tok.getIdentifierInfo() == Ident_super && |
| 1616 | getCurScope()->isInObjcMethodScope() && |
| 1617 | GetLookAheadToken(1).isNot(tok::period)) { |
| 1618 | Diag(Tok.getLocation(), diag::err_illegal_super_cast) |
| 1619 | << SourceRange(OpenLoc, RParenLoc); |
| 1620 | return ExprError(); |
| 1621 | } |
| 1622 | |
| 1623 | // Parse the cast-expression that follows it next. |
| 1624 | // TODO: For cast expression with CastTy. |
| 1625 | Result = ParseCastExpression(false, false, CastTy); |
| 1626 | if (!Result.isInvalid()) |
| 1627 | Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc, CastTy, |
| 1628 | RParenLoc, Result.take()); |
| 1629 | return move(Result); |
| 1630 | } |
| 1631 | |
| 1632 | Diag(Tok, diag::err_expected_lbrace_in_compound_literal); |
| 1633 | return ExprError(); |
| 1634 | } |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1635 | } else if (TypeOfCast) { |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1636 | // Parse the expression-list. |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1637 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1638 | |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1639 | ExprVector ArgExprs(Actions); |
| 1640 | CommaLocsTy CommaLocs; |
| 1641 | |
| 1642 | if (!ParseExpressionList(ArgExprs, CommaLocs)) { |
| 1643 | ExprType = SimpleExpr; |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1644 | Result = Actions.ActOnParenOrParenListExpr(OpenLoc, Tok.getLocation(), |
| 1645 | move_arg(ArgExprs), TypeOfCast); |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1646 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1647 | } else { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1648 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1649 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1650 | Result = ParseExpression(); |
| 1651 | ExprType = SimpleExpr; |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1652 | if (!Result.isInvalid() && Tok.is(tok::r_paren)) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1653 | Result = Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.take()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1654 | } |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1655 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1656 | // Match the ')'. |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1657 | if (Result.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1658 | SkipUntil(tok::r_paren); |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1659 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1660 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1661 | |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1662 | if (Tok.is(tok::r_paren)) |
| 1663 | RParenLoc = ConsumeParen(); |
| 1664 | else |
| 1665 | MatchRHSPunctuation(tok::r_paren, OpenLoc); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1666 | |
| 1667 | return move(Result); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1668 | } |
| 1669 | |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1670 | /// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name |
| 1671 | /// and we are at the left brace. |
| 1672 | /// |
| 1673 | /// postfix-expression: [C99 6.5.2] |
| 1674 | /// '(' type-name ')' '{' initializer-list '}' |
| 1675 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 1676 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1677 | ExprResult |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1678 | Parser::ParseCompoundLiteralExpression(ParsedType Ty, |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1679 | SourceLocation LParenLoc, |
| 1680 | SourceLocation RParenLoc) { |
| 1681 | assert(Tok.is(tok::l_brace) && "Not a compound literal!"); |
| 1682 | if (!getLang().C99) // Compound literals don't exist in C90. |
| 1683 | Diag(LParenLoc, diag::ext_c99_compound_literal); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1684 | ExprResult Result = ParseInitializer(); |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1685 | if (!Result.isInvalid() && Ty) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1686 | return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.take()); |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1687 | return move(Result); |
| 1688 | } |
| 1689 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1690 | /// ParseStringLiteralExpression - This handles the various token types that |
| 1691 | /// form string literals, and also handles string concatenation [C99 5.1.1.2, |
| 1692 | /// translation phase #6]. |
| 1693 | /// |
| 1694 | /// primary-expression: [C99 6.5.1] |
| 1695 | /// string-literal |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1696 | ExprResult Parser::ParseStringLiteralExpression() { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1697 | assert(isTokenStringLiteral() && "Not a string literal!"); |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 1698 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1699 | // String concat. Note that keywords like __func__ and __FUNCTION__ are not |
| 1700 | // considered to be strings for concatenation purposes. |
Chris Lattner | d217773 | 2007-07-20 16:59:19 +0000 | [diff] [blame] | 1701 | llvm::SmallVector<Token, 4> StringToks; |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 1702 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1703 | do { |
| 1704 | StringToks.push_back(Tok); |
| 1705 | ConsumeStringToken(); |
| 1706 | } while (isTokenStringLiteral()); |
| 1707 | |
| 1708 | // Pass the set of string tokens, ready for concatenation, to the actions. |
Sean Hunt | 6cf7502 | 2010-08-30 17:47:05 +0000 | [diff] [blame] | 1709 | return Actions.ActOnStringLiteral(&StringToks[0], StringToks.size()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1710 | } |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1711 | |
| 1712 | /// ParseExpressionList - Used for C/C++ (argument-)expression-list. |
| 1713 | /// |
| 1714 | /// argument-expression-list: |
| 1715 | /// assignment-expression |
| 1716 | /// argument-expression-list , assignment-expression |
| 1717 | /// |
| 1718 | /// [C++] expression-list: |
| 1719 | /// [C++] assignment-expression |
| 1720 | /// [C++] expression-list , assignment-expression |
| 1721 | /// |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 1722 | bool Parser::ParseExpressionList(llvm::SmallVectorImpl<Expr*> &Exprs, |
| 1723 | llvm::SmallVectorImpl<SourceLocation> &CommaLocs, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1724 | void (Sema::*Completer)(Scope *S, |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 1725 | Expr *Data, |
| 1726 | Expr **Args, |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1727 | unsigned NumArgs), |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 1728 | Expr *Data) { |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1729 | while (1) { |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1730 | if (Tok.is(tok::code_completion)) { |
| 1731 | if (Completer) |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1732 | (Actions.*Completer)(getCurScope(), Data, Exprs.data(), Exprs.size()); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 1733 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1734 | } |
| 1735 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1736 | ExprResult Expr(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1737 | if (Expr.isInvalid()) |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1738 | return true; |
Argyrios Kyrtzidis | 4fdc1ca | 2008-08-18 22:49:40 +0000 | [diff] [blame] | 1739 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 1740 | Exprs.push_back(Expr.release()); |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1741 | |
| 1742 | if (Tok.isNot(tok::comma)) |
| 1743 | return false; |
| 1744 | // Move to the next argument, remember where the comma was. |
| 1745 | CommaLocs.push_back(ConsumeToken()); |
| 1746 | } |
| 1747 | } |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1748 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1749 | /// ParseBlockId - Parse a block-id, which roughly looks like int (int x). |
| 1750 | /// |
| 1751 | /// [clang] block-id: |
| 1752 | /// [clang] specifier-qualifier-list block-declarator |
| 1753 | /// |
| 1754 | void Parser::ParseBlockId() { |
| 1755 | // Parse the specifier-qualifier-list piece. |
| 1756 | DeclSpec DS; |
| 1757 | ParseSpecifierQualifierList(DS); |
| 1758 | |
| 1759 | // Parse the block-declarator. |
| 1760 | Declarator DeclaratorInfo(DS, Declarator::BlockLiteralContext); |
| 1761 | ParseDeclarator(DeclaratorInfo); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1762 | |
Mike Stump | 6c92fa7 | 2009-04-29 21:40:37 +0000 | [diff] [blame] | 1763 | // We do this for: ^ __attribute__((noreturn)) {, as DS has the attributes. |
| 1764 | DeclaratorInfo.AddAttributes(DS.TakeAttributes(), |
| 1765 | SourceLocation()); |
| 1766 | |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1767 | if (Tok.is(tok::kw___attribute)) { |
| 1768 | SourceLocation Loc; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 1769 | AttributeList *AttrList = ParseGNUAttributes(&Loc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1770 | DeclaratorInfo.AddAttributes(AttrList, Loc); |
| 1771 | } |
| 1772 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1773 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1774 | Actions.ActOnBlockArguments(DeclaratorInfo, getCurScope()); |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1775 | } |
| 1776 | |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1777 | /// ParseBlockLiteralExpression - Parse a block literal, which roughly looks |
Steve Naroff | 17dab4f | 2008-09-16 23:11:46 +0000 | [diff] [blame] | 1778 | /// like ^(int x){ return x+1; } |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1779 | /// |
| 1780 | /// block-literal: |
| 1781 | /// [clang] '^' block-args[opt] compound-statement |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1782 | /// [clang] '^' block-id compound-statement |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1783 | /// [clang] block-args: |
| 1784 | /// [clang] '(' parameter-list ')' |
| 1785 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1786 | ExprResult Parser::ParseBlockLiteralExpression() { |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1787 | assert(Tok.is(tok::caret) && "block literal starts with ^"); |
| 1788 | SourceLocation CaretLoc = ConsumeToken(); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1789 | |
Chris Lattner | 6b91f00 | 2009-03-05 07:32:12 +0000 | [diff] [blame] | 1790 | PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc, |
| 1791 | "block literal parsing"); |
| 1792 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1793 | // Enter a scope to hold everything within the block. This includes the |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1794 | // argument decls, decls within the compound expression, etc. This also |
| 1795 | // allows determining whether a variable reference inside the block is |
| 1796 | // within or outside of the block. |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1797 | ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope | |
| 1798 | Scope::BreakScope | Scope::ContinueScope | |
| 1799 | Scope::DeclScope); |
Steve Naroff | 090276f | 2008-10-10 01:28:17 +0000 | [diff] [blame] | 1800 | |
| 1801 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1802 | Actions.ActOnBlockStart(CaretLoc, getCurScope()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1803 | |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1804 | // Parse the return type if present. |
| 1805 | DeclSpec DS; |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1806 | Declarator ParamInfo(DS, Declarator::BlockLiteralContext); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1807 | // FIXME: Since the return type isn't actually parsed, it can't be used to |
| 1808 | // fill ParamInfo with an initial valid range, so do it manually. |
| 1809 | ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation())); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1810 | |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1811 | // If this block has arguments, parse them. There is no ambiguity here with |
| 1812 | // the expression case, because the expression case requires a parameter list. |
| 1813 | if (Tok.is(tok::l_paren)) { |
| 1814 | ParseParenDeclarator(ParamInfo); |
| 1815 | // Parse the pieces after the identifier as if we had "int(...)". |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1816 | // SetIdentifier sets the source range end, but in this case we're past |
| 1817 | // that location. |
| 1818 | SourceLocation Tmp = ParamInfo.getSourceRange().getEnd(); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1819 | ParamInfo.SetIdentifier(0, CaretLoc); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1820 | ParamInfo.SetRangeEnd(Tmp); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1821 | if (ParamInfo.isInvalidType()) { |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1822 | // If there was an error parsing the arguments, they may have |
| 1823 | // tried to use ^(x+y) which requires an argument list. Just |
| 1824 | // skip the whole block literal. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1825 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1826 | return ExprError(); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1827 | } |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1828 | |
| 1829 | if (Tok.is(tok::kw___attribute)) { |
| 1830 | SourceLocation Loc; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 1831 | AttributeList *AttrList = ParseGNUAttributes(&Loc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1832 | ParamInfo.AddAttributes(AttrList, Loc); |
| 1833 | } |
| 1834 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1835 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1836 | Actions.ActOnBlockArguments(ParamInfo, getCurScope()); |
Mike Stump | aa771a8 | 2009-04-14 18:24:37 +0000 | [diff] [blame] | 1837 | } else if (!Tok.is(tok::l_brace)) { |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1838 | ParseBlockId(); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1839 | } else { |
| 1840 | // Otherwise, pretend we saw (void). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1841 | ParamInfo.AddTypeInfo(DeclaratorChunk::getFunction(true, false, |
Douglas Gregor | 965acbb | 2009-02-18 07:07:28 +0000 | [diff] [blame] | 1842 | SourceLocation(), |
Sebastian Redl | 7dc8134 | 2009-04-29 17:30:04 +0000 | [diff] [blame] | 1843 | 0, 0, 0, |
Sebastian Redl | 3cc9726 | 2009-05-31 11:47:27 +0000 | [diff] [blame] | 1844 | false, SourceLocation(), |
| 1845 | false, 0, 0, 0, |
Argyrios Kyrtzidis | 82bf010 | 2009-08-19 23:14:54 +0000 | [diff] [blame] | 1846 | CaretLoc, CaretLoc, |
| 1847 | ParamInfo), |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1848 | CaretLoc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1849 | |
| 1850 | if (Tok.is(tok::kw___attribute)) { |
| 1851 | SourceLocation Loc; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 1852 | AttributeList *AttrList = ParseGNUAttributes(&Loc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1853 | ParamInfo.AddAttributes(AttrList, Loc); |
| 1854 | } |
| 1855 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1856 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1857 | Actions.ActOnBlockArguments(ParamInfo, getCurScope()); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1858 | } |
| 1859 | |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1860 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1861 | ExprResult Result(true); |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 1862 | if (!Tok.is(tok::l_brace)) { |
Fariborz Jahanian | ff03fbb | 2009-01-14 19:39:53 +0000 | [diff] [blame] | 1863 | // Saw something like: ^expr |
| 1864 | Diag(Tok, diag::err_expected_expression); |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1865 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
Fariborz Jahanian | ff03fbb | 2009-01-14 19:39:53 +0000 | [diff] [blame] | 1866 | return ExprError(); |
| 1867 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1868 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1869 | StmtResult Stmt(ParseCompoundStatementBody()); |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 1870 | if (!Stmt.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1871 | Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.take(), getCurScope()); |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 1872 | else |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1873 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1874 | return move(Result); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1875 | } |