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 | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 180 | if (LHS.isInvalid()) return move(LHS); |
| 181 | |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 182 | return ParseRHSOfBinaryExpression(move(LHS), prec::Comma); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 183 | } |
| 184 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 185 | /// This routine is called when the '@' is seen and consumed. |
Fariborz Jahanian | 397fcc1 | 2007-09-19 19:14:32 +0000 | [diff] [blame] | 186 | /// Current token is an Identifier and is not a 'try'. This |
Chris Lattner | c97c204 | 2007-10-03 22:03:06 +0000 | [diff] [blame] | 187 | /// routine is necessary to disambiguate @try-statement from, |
| 188 | /// for example, @encode-expression. |
Fariborz Jahanian | 397fcc1 | 2007-09-19 19:14:32 +0000 | [diff] [blame] | 189 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 190 | ExprResult |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 191 | Parser::ParseExpressionWithLeadingAt(SourceLocation AtLoc) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 192 | ExprResult LHS(ParseObjCAtExpression(AtLoc)); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 193 | if (LHS.isInvalid()) return move(LHS); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 194 | |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 195 | return ParseRHSOfBinaryExpression(move(LHS), prec::Comma); |
Fariborz Jahanian | 397fcc1 | 2007-09-19 19:14:32 +0000 | [diff] [blame] | 196 | } |
| 197 | |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 198 | /// This routine is called when a leading '__extension__' is seen and |
| 199 | /// consumed. This is necessary because the token gets consumed in the |
| 200 | /// process of disambiguating between an expression and a declaration. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 201 | ExprResult |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 202 | Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 203 | ExprResult LHS(true); |
Eli Friedman | bc6c848 | 2009-05-16 23:40:44 +0000 | [diff] [blame] | 204 | { |
| 205 | // Silence extension warnings in the sub-expression |
| 206 | ExtensionRAIIObject O(Diags); |
| 207 | |
| 208 | LHS = ParseCastExpression(false); |
| 209 | if (LHS.isInvalid()) return move(LHS); |
| 210 | } |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 211 | |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 212 | LHS = Actions.ActOnUnaryOp(getCurScope(), ExtLoc, tok::kw___extension__, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 213 | LHS.take()); |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 214 | if (LHS.isInvalid()) return move(LHS); |
| 215 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 216 | return ParseRHSOfBinaryExpression(LHS.take(), prec::Comma); |
Eli Friedman | adf077f | 2009-01-27 08:43:38 +0000 | [diff] [blame] | 217 | } |
| 218 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 219 | /// ParseAssignmentExpression - Parse an expr that doesn't include commas. |
| 220 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 221 | ExprResult Parser::ParseAssignmentExpression() { |
Douglas Gregor | 01dfea0 | 2010-01-10 23:08:15 +0000 | [diff] [blame] | 222 | if (Tok.is(tok::code_completion)) { |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 223 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Expression); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 224 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 01dfea0 | 2010-01-10 23:08:15 +0000 | [diff] [blame] | 225 | } |
| 226 | |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 227 | if (Tok.is(tok::kw_throw)) |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 228 | return ParseThrowExpression(); |
Chris Lattner | 50dd289 | 2008-02-26 00:51:44 +0000 | [diff] [blame] | 229 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 230 | ExprResult LHS(ParseCastExpression(false)); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 231 | if (LHS.isInvalid()) return move(LHS); |
| 232 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 233 | return ParseRHSOfBinaryExpression(LHS.take(), prec::Assignment); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 234 | } |
| 235 | |
Chris Lattner | b93fb49 | 2008-06-02 21:31:07 +0000 | [diff] [blame] | 236 | /// ParseAssignmentExprWithObjCMessageExprStart - Parse an assignment expression |
| 237 | /// where part of an objc message send has already been parsed. In this case |
| 238 | /// LBracLoc indicates the location of the '[' of the message send, and either |
| 239 | /// ReceiverName or ReceiverExpr is non-null indicating the receiver of the |
| 240 | /// message. |
| 241 | /// |
| 242 | /// Since this handles full assignment-expression's, it handles postfix |
| 243 | /// expressions and other binary operators for these expressions as well. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 244 | ExprResult |
Chris Lattner | b93fb49 | 2008-06-02 21:31:07 +0000 | [diff] [blame] | 245 | Parser::ParseAssignmentExprWithObjCMessageExprStart(SourceLocation LBracLoc, |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 246 | SourceLocation SuperLoc, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 247 | ParsedType ReceiverType, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 248 | Expr *ReceiverExpr) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 249 | ExprResult R |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 250 | = ParseObjCMessageExpressionBody(LBracLoc, SuperLoc, |
| 251 | ReceiverType, ReceiverExpr); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 252 | if (R.isInvalid()) return move(R); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 253 | R = ParsePostfixExpressionSuffix(R.take()); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 254 | if (R.isInvalid()) return move(R); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 255 | return ParseRHSOfBinaryExpression(R.take(), prec::Assignment); |
Chris Lattner | b93fb49 | 2008-06-02 21:31:07 +0000 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 259 | ExprResult Parser::ParseConstantExpression() { |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 260 | // C++ [basic.def.odr]p2: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 261 | // An expression is potentially evaluated unless it appears where an |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 262 | // integral constant expression is required (see 5.19) [...]. |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 263 | EnterExpressionEvaluationContext Unevaluated(Actions, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 264 | Sema::Unevaluated); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 265 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 266 | ExprResult LHS(ParseCastExpression(false)); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 267 | if (LHS.isInvalid()) return move(LHS); |
| 268 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 269 | return ParseRHSOfBinaryExpression(LHS.take(), prec::Conditional); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 270 | } |
| 271 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 272 | /// ParseRHSOfBinaryExpression - Parse a binary expression that starts with |
| 273 | /// LHS and has a precedence of at least MinPrec. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 274 | ExprResult |
| 275 | Parser::ParseRHSOfBinaryExpression(ExprResult LHS, prec::Level MinPrec) { |
Douglas Gregor | 6aa14d8 | 2010-04-21 22:36:40 +0000 | [diff] [blame] | 276 | prec::Level NextTokPrec = getBinOpPrecedence(Tok.getKind(), |
| 277 | GreaterThanIsOperator, |
| 278 | getLang().CPlusPlus0x); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 279 | SourceLocation ColonLoc; |
| 280 | |
| 281 | while (1) { |
| 282 | // If this token has a lower precedence than we are allowed to parse (e.g. |
| 283 | // because we are called recursively, or because the token is not a binop), |
| 284 | // then we are done! |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 285 | if (NextTokPrec < MinPrec) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 286 | return move(LHS); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 287 | |
| 288 | // Consume the operator, saving the operator token for error reporting. |
Chris Lattner | d217773 | 2007-07-20 16:59:19 +0000 | [diff] [blame] | 289 | Token OpToken = Tok; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 290 | ConsumeToken(); |
Sebastian Redl | 2246050 | 2009-02-07 00:15:38 +0000 | [diff] [blame] | 291 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 292 | // Special case handling for the ternary operator. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 293 | ExprResult TernaryMiddle(true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 294 | if (NextTokPrec == prec::Conditional) { |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 295 | if (Tok.isNot(tok::colon)) { |
Chris Lattner | a69d0ed | 2009-12-10 02:02:58 +0000 | [diff] [blame] | 296 | // Don't parse FOO:BAR as if it were a typo for FOO::BAR. |
| 297 | ColonProtectionRAIIObject X(*this); |
| 298 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 299 | // Handle this production specially: |
| 300 | // logical-OR-expression '?' expression ':' conditional-expression |
| 301 | // In particular, the RHS of the '?' is 'expression', not |
| 302 | // 'logical-OR-expression' as we might expect. |
| 303 | TernaryMiddle = ParseExpression(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 304 | if (TernaryMiddle.isInvalid()) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 305 | return move(TernaryMiddle); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 306 | } else { |
| 307 | // Special case handling of "X ? Y : Z" where Y is empty: |
| 308 | // logical-OR-expression '?' ':' conditional-expression [GNU] |
Sebastian Redl | 15faa7f | 2008-12-09 20:22:58 +0000 | [diff] [blame] | 309 | TernaryMiddle = 0; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 310 | Diag(Tok, diag::ext_gnu_conditional_expr); |
| 311 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 312 | |
Chris Lattner | e5deae9 | 2010-04-20 21:33:39 +0000 | [diff] [blame] | 313 | if (Tok.is(tok::colon)) { |
| 314 | // Eat the colon. |
| 315 | ColonLoc = ConsumeToken(); |
| 316 | } else { |
Chris Lattner | 2472882 | 2010-05-24 22:31:37 +0000 | [diff] [blame] | 317 | // Otherwise, we're missing a ':'. Assume that this was a typo that the |
| 318 | // user forgot. If we're not in a macro instantion, we can suggest a |
| 319 | // fixit hint. If there were two spaces before the current token, |
| 320 | // suggest inserting the colon in between them, otherwise insert ": ". |
| 321 | SourceLocation FILoc = Tok.getLocation(); |
| 322 | const char *FIText = ": "; |
| 323 | if (FILoc.isFileID()) { |
| 324 | const SourceManager &SM = PP.getSourceManager(); |
| 325 | bool IsInvalid = false; |
| 326 | const char *SourcePtr = |
| 327 | SM.getCharacterData(FILoc.getFileLocWithOffset(-1), &IsInvalid); |
| 328 | if (!IsInvalid && *SourcePtr == ' ') { |
| 329 | SourcePtr = |
| 330 | SM.getCharacterData(FILoc.getFileLocWithOffset(-2), &IsInvalid); |
| 331 | if (!IsInvalid && *SourcePtr == ' ') { |
| 332 | FILoc = FILoc.getFileLocWithOffset(-1); |
| 333 | FIText = ":"; |
| 334 | } |
| 335 | } |
| 336 | } |
| 337 | |
Ted Kremenek | 987aa87 | 2010-04-12 22:10:35 +0000 | [diff] [blame] | 338 | Diag(Tok, diag::err_expected_colon) |
Chris Lattner | 2472882 | 2010-05-24 22:31:37 +0000 | [diff] [blame] | 339 | << FixItHint::CreateInsertion(FILoc, FIText); |
Chris Lattner | 28eb7e9 | 2008-11-23 23:17:07 +0000 | [diff] [blame] | 340 | Diag(OpToken, diag::note_matching) << "?"; |
Chris Lattner | e5deae9 | 2010-04-20 21:33:39 +0000 | [diff] [blame] | 341 | ColonLoc = Tok.getLocation(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 342 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 343 | } |
Fariborz Jahanian | f071e9b | 2009-10-23 21:01:39 +0000 | [diff] [blame] | 344 | |
Douglas Gregor | 5ac3bdb | 2010-05-30 01:49:25 +0000 | [diff] [blame] | 345 | // Code completion for the right-hand side of an assignment expression |
| 346 | // goes through a special hook that takes the left-hand side into account. |
| 347 | if (Tok.is(tok::code_completion) && NextTokPrec == prec::Assignment) { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 348 | Actions.CodeCompleteAssignmentRHS(getCurScope(), LHS.get()); |
Douglas Gregor | 5ac3bdb | 2010-05-30 01:49:25 +0000 | [diff] [blame] | 349 | ConsumeCodeCompletionToken(); |
| 350 | return ExprError(); |
| 351 | } |
| 352 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 353 | // Parse another leaf here for the RHS of the operator. |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 354 | // ParseCastExpression works here because all RHS expressions in C have it |
| 355 | // as a prefix, at least. However, in C++, an assignment-expression could |
| 356 | // be a throw-expression, which is not a valid cast-expression. |
| 357 | // Therefore we need some special-casing here. |
| 358 | // Also note that the third operand of the conditional operator is |
| 359 | // an assignment-expression in C++. |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 360 | ExprResult RHS; |
Sebastian Redl | 3201f6b | 2009-04-16 17:51:27 +0000 | [diff] [blame] | 361 | if (getLang().CPlusPlus && NextTokPrec <= prec::Conditional) |
| 362 | RHS = ParseAssignmentExpression(); |
| 363 | else |
| 364 | RHS = ParseCastExpression(false); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 365 | if (RHS.isInvalid()) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 366 | return move(RHS); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 367 | |
| 368 | // Remember the precedence of this operator and get the precedence of the |
| 369 | // operator immediately to the right of the RHS. |
Douglas Gregor | 6aa14d8 | 2010-04-21 22:36:40 +0000 | [diff] [blame] | 370 | prec::Level ThisPrec = NextTokPrec; |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 371 | NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 372 | getLang().CPlusPlus0x); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 373 | |
| 374 | // Assignment and conditional expressions are right-associative. |
Chris Lattner | d7d860d | 2007-12-18 06:06:23 +0000 | [diff] [blame] | 375 | bool isRightAssoc = ThisPrec == prec::Conditional || |
| 376 | ThisPrec == prec::Assignment; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 377 | |
| 378 | // Get the precedence of the operator to the right of the RHS. If it binds |
| 379 | // more tightly with RHS than we do, evaluate it completely first. |
| 380 | if (ThisPrec < NextTokPrec || |
| 381 | (ThisPrec == NextTokPrec && isRightAssoc)) { |
| 382 | // If this is left-associative, only parse things on the RHS that bind |
| 383 | // more tightly than the current operator. If it is left-associative, it |
| 384 | // is okay, to bind exactly as tightly. For example, compile A=B=C=D as |
| 385 | // 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] | 386 | // The function takes ownership of the RHS. |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 387 | RHS = ParseRHSOfBinaryExpression(RHS.get(), |
Douglas Gregor | 6aa14d8 | 2010-04-21 22:36:40 +0000 | [diff] [blame] | 388 | static_cast<prec::Level>(ThisPrec + !isRightAssoc)); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 389 | if (RHS.isInvalid()) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 390 | return move(RHS); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 391 | |
Douglas Gregor | 3965b7b | 2009-02-25 23:02:36 +0000 | [diff] [blame] | 392 | NextTokPrec = getBinOpPrecedence(Tok.getKind(), GreaterThanIsOperator, |
| 393 | getLang().CPlusPlus0x); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 394 | } |
| 395 | assert(NextTokPrec <= ThisPrec && "Recursion didn't work!"); |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 396 | |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 397 | if (!LHS.isInvalid()) { |
Chris Lattner | d56d6b6 | 2007-08-31 05:01:50 +0000 | [diff] [blame] | 398 | // Combine the LHS and RHS into the LHS (e.g. build AST). |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 399 | if (TernaryMiddle.isInvalid()) { |
| 400 | // If we're using '>>' as an operator within a template |
| 401 | // argument list (in C++98), suggest the addition of |
| 402 | // parentheses so that the code remains well-formed in C++0x. |
| 403 | if (!GreaterThanIsOperator && OpToken.is(tok::greatergreater)) |
| 404 | SuggestParentheses(OpToken.getLocation(), |
| 405 | diag::warn_cxx0x_right_shift_in_template_arg, |
| 406 | SourceRange(Actions.getExprRange(LHS.get()).getBegin(), |
| 407 | Actions.getExprRange(RHS.get()).getEnd())); |
| 408 | |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 409 | LHS = Actions.ActOnBinOp(getCurScope(), OpToken.getLocation(), |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 410 | OpToken.getKind(), LHS.take(), RHS.take()); |
Douglas Gregor | 4b2d3f7 | 2009-02-26 21:00:50 +0000 | [diff] [blame] | 411 | } else |
Steve Naroff | f69936d | 2007-09-16 03:34:24 +0000 | [diff] [blame] | 412 | LHS = Actions.ActOnConditionalOp(OpToken.getLocation(), ColonLoc, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 413 | LHS.take(), TernaryMiddle.take(), |
| 414 | RHS.take()); |
Chris Lattner | d56d6b6 | 2007-08-31 05:01:50 +0000 | [diff] [blame] | 415 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 416 | } |
| 417 | } |
| 418 | |
| 419 | /// ParseCastExpression - Parse a cast-expression, or, if isUnaryExpression is |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 420 | /// true, parse a unary-expression. isAddressOfOperand exists because an |
| 421 | /// id-expression that is the operand of address-of gets special treatment |
| 422 | /// due to member pointers. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 423 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 424 | ExprResult Parser::ParseCastExpression(bool isUnaryExpression, |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 425 | bool isAddressOfOperand, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 426 | ParsedType TypeOfCast) { |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 427 | bool NotCastExpr; |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 428 | ExprResult Res = ParseCastExpression(isUnaryExpression, |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 429 | isAddressOfOperand, |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 430 | NotCastExpr, |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 431 | TypeOfCast); |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 432 | if (NotCastExpr) |
| 433 | Diag(Tok, diag::err_expected_expression); |
| 434 | return move(Res); |
| 435 | } |
| 436 | |
| 437 | /// ParseCastExpression - Parse a cast-expression, or, if isUnaryExpression is |
| 438 | /// true, parse a unary-expression. isAddressOfOperand exists because an |
| 439 | /// id-expression that is the operand of address-of gets special treatment |
| 440 | /// due to member pointers. NotCastExpr is set to true if the token is not the |
| 441 | /// start of a cast-expression, and no diagnostic is emitted in this case. |
| 442 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 443 | /// cast-expression: [C99 6.5.4] |
| 444 | /// unary-expression |
| 445 | /// '(' type-name ')' cast-expression |
| 446 | /// |
| 447 | /// unary-expression: [C99 6.5.3] |
| 448 | /// postfix-expression |
| 449 | /// '++' unary-expression |
| 450 | /// '--' unary-expression |
| 451 | /// unary-operator cast-expression |
| 452 | /// 'sizeof' unary-expression |
| 453 | /// 'sizeof' '(' type-name ')' |
| 454 | /// [GNU] '__alignof' unary-expression |
| 455 | /// [GNU] '__alignof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 456 | /// [C++0x] 'alignof' '(' type-id ')' |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 457 | /// [GNU] '&&' identifier |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 458 | /// [C++] new-expression |
| 459 | /// [C++] delete-expression |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 460 | /// [C++0x] 'noexcept' '(' expression ')' |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 461 | /// |
| 462 | /// unary-operator: one of |
| 463 | /// '&' '*' '+' '-' '~' '!' |
| 464 | /// [GNU] '__extension__' '__real' '__imag' |
| 465 | /// |
| 466 | /// primary-expression: [C99 6.5.1] |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 467 | /// [C99] identifier |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 468 | /// [C++] id-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 469 | /// constant |
| 470 | /// string-literal |
| 471 | /// [C++] boolean-literal [C++ 2.13.5] |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 472 | /// [C++0x] 'nullptr' [C++0x 2.14.7] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 473 | /// '(' expression ')' |
| 474 | /// '__func__' [C99 6.4.2.2] |
| 475 | /// [GNU] '__FUNCTION__' |
| 476 | /// [GNU] '__PRETTY_FUNCTION__' |
| 477 | /// [GNU] '(' compound-statement ')' |
| 478 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
| 479 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
| 480 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
| 481 | /// assign-expr ')' |
| 482 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
Douglas Gregor | 2d8b273 | 2008-11-29 04:51:27 +0000 | [diff] [blame] | 483 | /// [GNU] '__null' |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 484 | /// [OBJC] '[' objc-message-expr ']' |
Chris Lattner | 5ac87ed | 2008-01-25 18:58:06 +0000 | [diff] [blame] | 485 | /// [OBJC] '@selector' '(' objc-selector-arg ')' |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 486 | /// [OBJC] '@protocol' '(' identifier ')' |
| 487 | /// [OBJC] '@encode' '(' type-name ')' |
Fariborz Jahanian | 0ccb27d | 2007-09-05 19:52:07 +0000 | [diff] [blame] | 488 | /// [OBJC] objc-string-literal |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 489 | /// [C++] simple-type-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 490 | /// [C++] typename-specifier '(' expression-list[opt] ')' [C++ 5.2.3] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 491 | /// [C++] 'const_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 492 | /// [C++] 'dynamic_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 493 | /// [C++] 'reinterpret_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
| 494 | /// [C++] 'static_cast' '<' type-name '>' '(' expression ')' [C++ 5.2p1] |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 495 | /// [C++] 'typeid' '(' expression ')' [C++ 5.2p1] |
| 496 | /// [C++] 'typeid' '(' type-id ')' [C++ 5.2p1] |
Argyrios Kyrtzidis | d7464be | 2008-07-16 07:23:27 +0000 | [diff] [blame] | 497 | /// [C++] 'this' [C++ 9.3.2] |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 498 | /// [G++] unary-type-trait '(' type-id ')' |
| 499 | /// [G++] binary-type-trait '(' type-id ',' type-id ')' [TODO] |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 500 | /// [clang] '^' block-literal |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 501 | /// |
| 502 | /// constant: [C99 6.4.4] |
| 503 | /// integer-constant |
| 504 | /// floating-constant |
| 505 | /// enumeration-constant -> identifier |
| 506 | /// character-constant |
| 507 | /// |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 508 | /// id-expression: [C++ 5.1] |
| 509 | /// unqualified-id |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 510 | /// qualified-id |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 511 | /// |
| 512 | /// unqualified-id: [C++ 5.1] |
| 513 | /// identifier |
| 514 | /// operator-function-id |
Douglas Gregor | 2725ca8 | 2010-04-21 19:57:20 +0000 | [diff] [blame] | 515 | /// conversion-function-id |
| 516 | /// '~' class-name |
| 517 | /// template-id |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 518 | /// |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 519 | /// new-expression: [C++ 5.3.4] |
| 520 | /// '::'[opt] 'new' new-placement[opt] new-type-id |
| 521 | /// new-initializer[opt] |
| 522 | /// '::'[opt] 'new' new-placement[opt] '(' type-id ')' |
| 523 | /// new-initializer[opt] |
| 524 | /// |
| 525 | /// delete-expression: [C++ 5.3.5] |
| 526 | /// '::'[opt] 'delete' cast-expression |
| 527 | /// '::'[opt] 'delete' '[' ']' cast-expression |
| 528 | /// |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 529 | /// [GNU] unary-type-trait: |
Sebastian Redl | c238f09 | 2010-08-31 04:59:00 +0000 | [diff] [blame] | 530 | /// '__has_nothrow_assign' |
| 531 | /// '__has_nothrow_copy' |
| 532 | /// '__has_nothrow_constructor' |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 533 | /// '__has_trivial_assign' [TODO] |
| 534 | /// '__has_trivial_copy' [TODO] |
Anders Carlsson | 347ba89 | 2009-04-16 00:08:20 +0000 | [diff] [blame] | 535 | /// '__has_trivial_constructor' |
Anders Carlsson | 072abef | 2009-04-17 02:34:54 +0000 | [diff] [blame] | 536 | /// '__has_trivial_destructor' |
Sebastian Redl | d4b25cb | 2010-09-02 23:19:42 +0000 | [diff] [blame] | 537 | /// '__has_virtual_destructor' |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 538 | /// '__is_abstract' [TODO] |
| 539 | /// '__is_class' |
| 540 | /// '__is_empty' [TODO] |
| 541 | /// '__is_enum' |
| 542 | /// '__is_pod' |
| 543 | /// '__is_polymorphic' |
| 544 | /// '__is_union' |
| 545 | /// |
| 546 | /// [GNU] binary-type-trait: |
| 547 | /// '__is_base_of' [TODO] |
| 548 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 549 | ExprResult Parser::ParseCastExpression(bool isUnaryExpression, |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 550 | bool isAddressOfOperand, |
| 551 | bool &NotCastExpr, |
| 552 | ParsedType TypeOfCast) { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 553 | ExprResult Res; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 554 | tok::TokenKind SavedKind = Tok.getKind(); |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 555 | NotCastExpr = false; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 556 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 557 | // This handles all of cast-expression, unary-expression, postfix-expression, |
| 558 | // and primary-expression. We handle them together like this for efficiency |
| 559 | // and to simplify handling of an expression starting with a '(' token: which |
| 560 | // may be one of a parenthesized expression, cast-expression, compound literal |
| 561 | // expression, or statement expression. |
| 562 | // |
| 563 | // If the parsed tokens consist of a primary-expression, the cases below |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 564 | // break out of the switch; at the end we call ParsePostfixExpressionSuffix |
| 565 | // to handle the postfix expression suffixes. Cases that cannot be followed |
| 566 | // by postfix exprs should return without invoking |
| 567 | // ParsePostfixExpressionSuffix. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 568 | switch (SavedKind) { |
| 569 | case tok::l_paren: { |
| 570 | // If this expression is limited to being a unary-expression, the parent can |
| 571 | // not start a cast expression. |
| 572 | ParenParseOption ParenExprType = |
Douglas Gregor | d420663 | 2010-08-06 14:50:36 +0000 | [diff] [blame] | 573 | (isUnaryExpression && !getLang().CPlusPlus)? CompoundLiteral : CastExpr; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 574 | ParsedType CastTy; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 575 | SourceLocation LParenLoc = Tok.getLocation(); |
| 576 | SourceLocation RParenLoc; |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 577 | |
| 578 | { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 579 | // The inside of the parens don't need to be a colon protected scope, and |
| 580 | // isn't immediately a message send. |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 581 | ColonProtectionRAIIObject X(*this, false); |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 582 | |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 583 | Res = ParseParenExpression(ParenExprType, false/*stopIfCastExr*/, |
| 584 | TypeOfCast, CastTy, RParenLoc); |
Douglas Gregor | bd6c76f | 2010-05-30 22:23:08 +0000 | [diff] [blame] | 585 | if (Res.isInvalid()) |
| 586 | return move(Res); |
Chris Lattner | 932dff7 | 2009-12-10 02:08:07 +0000 | [diff] [blame] | 587 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 588 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 589 | switch (ParenExprType) { |
| 590 | case SimpleExpr: break; // Nothing else to do. |
| 591 | case CompoundStmt: break; // Nothing else to do. |
| 592 | case CompoundLiteral: |
| 593 | // We parsed '(' type-name ')' '{' ... '}'. If any suffixes of |
| 594 | // postfix-expression exist, parse them now. |
| 595 | break; |
| 596 | case CastExpr: |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 597 | // We have parsed the cast-expression and no postfix-expr pieces are |
| 598 | // following. |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 599 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 600 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 601 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 602 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 603 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 604 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 605 | // primary-expression |
| 606 | case tok::numeric_constant: |
| 607 | // constant: integer-constant |
| 608 | // constant: floating-constant |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 609 | |
Steve Naroff | f69936d | 2007-09-16 03:34:24 +0000 | [diff] [blame] | 610 | Res = Actions.ActOnNumericConstant(Tok); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 611 | ConsumeToken(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 612 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 613 | |
| 614 | case tok::kw_true: |
| 615 | case tok::kw_false: |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 616 | return ParseCXXBoolLiteral(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 617 | |
Sebastian Redl | 6e8ed16 | 2009-05-10 18:38:11 +0000 | [diff] [blame] | 618 | case tok::kw_nullptr: |
| 619 | return Actions.ActOnCXXNullPtrLiteral(ConsumeToken()); |
| 620 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 621 | case tok::identifier: { // primary-expression: identifier |
| 622 | // unqualified-id: identifier |
| 623 | // constant: enumeration-constant |
Chris Lattner | b31757b | 2009-01-06 05:06:21 +0000 | [diff] [blame] | 624 | // Turn a potentially qualified name into a annot_typename or |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 625 | // 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] | 626 | if (getLang().CPlusPlus) { |
John McCall | b672707 | 2010-01-07 19:29:58 +0000 | [diff] [blame] | 627 | // Avoid the unnecessary parse-time lookup in the common case |
| 628 | // where the syntax forbids a type. |
| 629 | const Token &Next = NextToken(); |
| 630 | if (Next.is(tok::coloncolon) || |
| 631 | (!ColonIsSacred && Next.is(tok::colon)) || |
| 632 | Next.is(tok::less) || |
| 633 | Next.is(tok::l_paren)) { |
| 634 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
| 635 | if (TryAnnotateTypeOrScopeToken()) |
John McCall | 9ba6166 | 2010-02-26 08:45:28 +0000 | [diff] [blame] | 636 | return ExprError(); |
| 637 | if (!Tok.is(tok::identifier)) |
John McCall | b672707 | 2010-01-07 19:29:58 +0000 | [diff] [blame] | 638 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand); |
| 639 | } |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 640 | } |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 641 | |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 642 | // Consume the identifier so that we can see if it is followed by a '(' or |
| 643 | // '.'. |
| 644 | IdentifierInfo &II = *Tok.getIdentifierInfo(); |
| 645 | SourceLocation ILoc = ConsumeToken(); |
| 646 | |
Chris Lattner | eb483eb | 2010-04-11 08:28:14 +0000 | [diff] [blame] | 647 | // Support 'Class.property' and 'super.property' notation. |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 648 | if (getLang().ObjC1 && Tok.is(tok::period) && |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 649 | (Actions.getTypeName(II, ILoc, getCurScope()) || |
Chris Lattner | 236beab | 2010-04-12 06:20:33 +0000 | [diff] [blame] | 650 | // Allow the base to be 'super' if in an objc-method. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 651 | (&II == Ident_super && getCurScope()->isInObjcMethodScope()))) { |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 652 | SourceLocation DotLoc = ConsumeToken(); |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 653 | |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 654 | if (Tok.isNot(tok::identifier)) { |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 655 | Diag(Tok, diag::err_expected_property_name); |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 656 | return ExprError(); |
| 657 | } |
| 658 | IdentifierInfo &PropertyName = *Tok.getIdentifierInfo(); |
| 659 | SourceLocation PropertyLoc = ConsumeToken(); |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 660 | |
| 661 | Res = Actions.ActOnClassPropertyRefExpr(II, PropertyName, |
| 662 | ILoc, PropertyLoc); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 663 | break; |
Steve Naroff | 61f72cb | 2009-03-09 21:12:44 +0000 | [diff] [blame] | 664 | } |
John McCall | 9c72c60 | 2010-08-27 09:08:28 +0000 | [diff] [blame] | 665 | |
| 666 | // Make sure to pass down the right value for isAddressOfOperand. |
| 667 | if (isAddressOfOperand && isPostfixExpressionSuffixStart()) |
| 668 | isAddressOfOperand = false; |
Chris Lattner | b7c3fd7 | 2009-10-25 17:04:48 +0000 | [diff] [blame] | 669 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 670 | // Function designators are allowed to be undeclared (C99 6.5.1p2), so we |
| 671 | // need to know whether or not this identifier is a function designator or |
| 672 | // not. |
Douglas Gregor | 02a24ee | 2009-11-03 16:56:39 +0000 | [diff] [blame] | 673 | UnqualifiedId Name; |
| 674 | CXXScopeSpec ScopeSpec; |
| 675 | Name.setIdentifier(&II, ILoc); |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 676 | Res = Actions.ActOnIdExpression(getCurScope(), ScopeSpec, Name, |
John McCall | 9c72c60 | 2010-08-27 09:08:28 +0000 | [diff] [blame] | 677 | Tok.is(tok::l_paren), isAddressOfOperand); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 678 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 679 | } |
| 680 | case tok::char_constant: // constant: character-constant |
Steve Naroff | f69936d | 2007-09-16 03:34:24 +0000 | [diff] [blame] | 681 | Res = Actions.ActOnCharacterConstant(Tok); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 682 | ConsumeToken(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 683 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 684 | case tok::kw___func__: // primary-expression: __func__ [C99 6.4.2.2] |
| 685 | case tok::kw___FUNCTION__: // primary-expression: __FUNCTION__ [GNU] |
| 686 | case tok::kw___PRETTY_FUNCTION__: // primary-expression: __P..Y_F..N__ [GNU] |
Chris Lattner | d9f6910 | 2008-08-10 01:53:14 +0000 | [diff] [blame] | 687 | Res = Actions.ActOnPredefinedExpr(Tok.getLocation(), SavedKind); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 688 | ConsumeToken(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 689 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 690 | case tok::string_literal: // primary-expression: string-literal |
| 691 | case tok::wide_string_literal: |
| 692 | Res = ParseStringLiteralExpression(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 693 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 694 | case tok::kw___builtin_va_arg: |
| 695 | case tok::kw___builtin_offsetof: |
| 696 | case tok::kw___builtin_choose_expr: |
| 697 | case tok::kw___builtin_types_compatible_p: |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 698 | return ParseBuiltinPrimaryExpression(); |
Douglas Gregor | 2d8b273 | 2008-11-29 04:51:27 +0000 | [diff] [blame] | 699 | case tok::kw___null: |
Sebastian Redl | f53597f | 2009-03-15 17:47:39 +0000 | [diff] [blame] | 700 | return Actions.ActOnGNUNullExpr(ConsumeToken()); |
Douglas Gregor | 2d8b273 | 2008-11-29 04:51:27 +0000 | [diff] [blame] | 701 | break; |
Douglas Gregor | d420663 | 2010-08-06 14:50:36 +0000 | [diff] [blame] | 702 | case tok::plusplus: // unary-expression: '++' unary-expression [C99] |
| 703 | case tok::minusminus: { // unary-expression: '--' unary-expression [C99] |
| 704 | // C++ [expr.unary] has: |
| 705 | // unary-expression: |
| 706 | // ++ cast-expression |
| 707 | // -- cast-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 708 | SourceLocation SavedLoc = ConsumeToken(); |
Douglas Gregor | d420663 | 2010-08-06 14:50:36 +0000 | [diff] [blame] | 709 | Res = ParseCastExpression(!getLang().CPlusPlus); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 710 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 711 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 712 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 713 | } |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 714 | case tok::amp: { // unary-expression: '&' cast-expression |
| 715 | // Special treatment because of member pointers |
| 716 | SourceLocation SavedLoc = ConsumeToken(); |
| 717 | Res = ParseCastExpression(false, true); |
| 718 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 719 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 720 | return move(Res); |
| 721 | } |
| 722 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 723 | case tok::star: // unary-expression: '*' cast-expression |
| 724 | case tok::plus: // unary-expression: '+' cast-expression |
| 725 | case tok::minus: // unary-expression: '-' cast-expression |
| 726 | case tok::tilde: // unary-expression: '~' cast-expression |
| 727 | case tok::exclaim: // unary-expression: '!' cast-expression |
| 728 | case tok::kw___real: // unary-expression: '__real' cast-expression [GNU] |
Chris Lattner | 3508084 | 2008-02-02 20:20:10 +0000 | [diff] [blame] | 729 | case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU] |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 730 | SourceLocation SavedLoc = ConsumeToken(); |
| 731 | Res = ParseCastExpression(false); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 732 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 733 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 734 | return move(Res); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 735 | } |
| 736 | |
Chris Lattner | 3508084 | 2008-02-02 20:20:10 +0000 | [diff] [blame] | 737 | case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU] |
| 738 | // __extension__ silences extension warnings in the subexpression. |
Chris Lattner | c46d1a1 | 2008-10-20 06:45:43 +0000 | [diff] [blame] | 739 | ExtensionRAIIObject O(Diags); // Use RAII to do this. |
Chris Lattner | 3508084 | 2008-02-02 20:20:10 +0000 | [diff] [blame] | 740 | SourceLocation SavedLoc = ConsumeToken(); |
| 741 | Res = ParseCastExpression(false); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 742 | if (!Res.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 743 | Res = Actions.ActOnUnaryOp(getCurScope(), SavedLoc, SavedKind, Res.get()); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 744 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 745 | } |
| 746 | case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression |
| 747 | // unary-expression: 'sizeof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 748 | case tok::kw_alignof: |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 749 | case tok::kw___alignof: // unary-expression: '__alignof' unary-expression |
| 750 | // unary-expression: '__alignof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 751 | // unary-expression: 'alignof' '(' type-id ')' |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 752 | return ParseSizeofAlignofExpression(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 753 | case tok::ampamp: { // unary-expression: '&&' identifier |
| 754 | SourceLocation AmpAmpLoc = ConsumeToken(); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 755 | if (Tok.isNot(tok::identifier)) |
| 756 | return ExprError(Diag(Tok, diag::err_expected_ident)); |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 757 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 758 | Diag(AmpAmpLoc, diag::ext_gnu_address_of_label); |
Steve Naroff | 1b273c4 | 2007-09-16 14:56:35 +0000 | [diff] [blame] | 759 | Res = Actions.ActOnAddrLabel(AmpAmpLoc, Tok.getLocation(), |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 760 | Tok.getIdentifierInfo()); |
| 761 | ConsumeToken(); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 762 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 763 | } |
| 764 | case tok::kw_const_cast: |
| 765 | case tok::kw_dynamic_cast: |
| 766 | case tok::kw_reinterpret_cast: |
| 767 | case tok::kw_static_cast: |
Argyrios Kyrtzidis | b348b81 | 2008-08-16 19:45:32 +0000 | [diff] [blame] | 768 | Res = ParseCXXCasts(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 769 | break; |
Sebastian Redl | c42e118 | 2008-11-11 11:37:55 +0000 | [diff] [blame] | 770 | case tok::kw_typeid: |
| 771 | Res = ParseCXXTypeid(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 772 | break; |
Francois Pichet | 01b7c30 | 2010-09-08 12:20:18 +0000 | [diff] [blame] | 773 | case tok::kw___uuidof: |
| 774 | Res = ParseCXXUuidof(); |
| 775 | break; |
Argyrios Kyrtzidis | 4cc18a4 | 2008-06-24 22:12:16 +0000 | [diff] [blame] | 776 | case tok::kw_this: |
Argyrios Kyrtzidis | 289d773 | 2008-08-16 19:34:46 +0000 | [diff] [blame] | 777 | Res = ParseCXXThis(); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 778 | break; |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 779 | |
| 780 | case tok::kw_char: |
| 781 | case tok::kw_wchar_t: |
Alisdair Meredith | f5c209d | 2009-07-14 06:30:34 +0000 | [diff] [blame] | 782 | case tok::kw_char16_t: |
| 783 | case tok::kw_char32_t: |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 784 | case tok::kw_bool: |
| 785 | case tok::kw_short: |
| 786 | case tok::kw_int: |
| 787 | case tok::kw_long: |
| 788 | case tok::kw_signed: |
| 789 | case tok::kw_unsigned: |
| 790 | case tok::kw_float: |
| 791 | case tok::kw_double: |
| 792 | case tok::kw_void: |
Douglas Gregor | d57959a | 2009-03-27 23:10:48 +0000 | [diff] [blame] | 793 | case tok::kw_typename: |
Chris Lattner | 2dcaab3 | 2009-01-04 22:28:21 +0000 | [diff] [blame] | 794 | case tok::kw_typeof: |
John Thompson | 82287d1 | 2010-02-05 00:12:22 +0000 | [diff] [blame] | 795 | case tok::kw___vector: |
Chris Lattner | b31757b | 2009-01-06 05:06:21 +0000 | [diff] [blame] | 796 | case tok::annot_typename: { |
Chris Lattner | 2dcaab3 | 2009-01-04 22:28:21 +0000 | [diff] [blame] | 797 | if (!getLang().CPlusPlus) { |
| 798 | Diag(Tok, diag::err_expected_expression); |
| 799 | return ExprError(); |
| 800 | } |
Eli Friedman | 2e0cdb4 | 2009-06-11 00:33:41 +0000 | [diff] [blame] | 801 | |
| 802 | if (SavedKind == tok::kw_typename) { |
| 803 | // postfix-expression: typename-specifier '(' expression-list[opt] ')' |
John McCall | 9ba6166 | 2010-02-26 08:45:28 +0000 | [diff] [blame] | 804 | if (TryAnnotateTypeOrScopeToken()) |
Eli Friedman | 2e0cdb4 | 2009-06-11 00:33:41 +0000 | [diff] [blame] | 805 | return ExprError(); |
| 806 | } |
| 807 | |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 808 | // postfix-expression: simple-type-specifier '(' expression-list[opt] ')' |
| 809 | // |
| 810 | DeclSpec DS; |
| 811 | ParseCXXSimpleTypeSpecifier(DS); |
| 812 | if (Tok.isNot(tok::l_paren)) |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 813 | return ExprError(Diag(Tok, diag::err_expected_lparen_after_type) |
| 814 | << DS.getSourceRange()); |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 815 | |
| 816 | Res = ParseCXXTypeConstructExpression(DS); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 817 | break; |
Argyrios Kyrtzidis | 987a14b | 2008-08-22 15:38:55 +0000 | [diff] [blame] | 818 | } |
| 819 | |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 820 | case tok::annot_cxxscope: { // [C++] id-expression: qualified-id |
Douglas Gregor | 4074eef | 2010-04-23 02:08:13 +0000 | [diff] [blame] | 821 | // If TryAnnotateTypeOrScopeToken annotates the token, tail recurse. |
| 822 | // (We can end up in this situation after tentative parsing.) |
| 823 | if (TryAnnotateTypeOrScopeToken()) |
| 824 | return ExprError(); |
| 825 | if (!Tok.is(tok::annot_cxxscope)) |
| 826 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 827 | NotCastExpr, TypeOfCast); |
| 828 | |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 829 | Token Next = NextToken(); |
| 830 | if (Next.is(tok::annot_template_id)) { |
| 831 | TemplateIdAnnotation *TemplateId |
| 832 | = static_cast<TemplateIdAnnotation *>(Next.getAnnotationValue()); |
| 833 | if (TemplateId->Kind == TNK_Type_template) { |
| 834 | // We have a qualified template-id that we know refers to a |
| 835 | // type, translate it into a type and continue parsing as a |
| 836 | // cast expression. |
| 837 | CXXScopeSpec SS; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 838 | ParseOptionalCXXScopeSpecifier(SS, ParsedType(), false); |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 839 | AnnotateTemplateIdTokenAsType(&SS); |
| 840 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 841 | NotCastExpr, TypeOfCast); |
| 842 | } |
| 843 | } |
| 844 | |
| 845 | // Parse as an id-expression. |
| 846 | Res = ParseCXXIdExpression(isAddressOfOperand); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 847 | break; |
Douglas Gregor | ae4c77d | 2010-02-05 19:11:37 +0000 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | case tok::annot_template_id: { // [C++] template-id |
| 851 | TemplateIdAnnotation *TemplateId |
| 852 | = static_cast<TemplateIdAnnotation *>(Tok.getAnnotationValue()); |
| 853 | if (TemplateId->Kind == TNK_Type_template) { |
| 854 | // We have a template-id that we know refers to a type, |
| 855 | // translate it into a type and continue parsing as a cast |
| 856 | // expression. |
| 857 | AnnotateTemplateIdTokenAsType(); |
| 858 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 859 | NotCastExpr, TypeOfCast); |
| 860 | } |
| 861 | |
| 862 | // Fall through to treat the template-id as an id-expression. |
| 863 | } |
| 864 | |
Argyrios Kyrtzidis | eb83ecd | 2008-11-08 16:45:02 +0000 | [diff] [blame] | 865 | case tok::kw_operator: // [C++] id-expression: operator/conversion-function-id |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 866 | Res = ParseCXXIdExpression(isAddressOfOperand); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 867 | break; |
Douglas Gregor | 1cd1b1e | 2008-11-06 22:13:31 +0000 | [diff] [blame] | 868 | |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 869 | case tok::coloncolon: { |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 870 | // ::foo::bar -> global qualified name etc. If TryAnnotateTypeOrScopeToken |
| 871 | // annotates the token, tail recurse. |
| 872 | if (TryAnnotateTypeOrScopeToken()) |
John McCall | 9ba6166 | 2010-02-26 08:45:28 +0000 | [diff] [blame] | 873 | return ExprError(); |
| 874 | if (!Tok.is(tok::coloncolon)) |
Sebastian Redl | ebc07d5 | 2009-02-03 20:19:35 +0000 | [diff] [blame] | 875 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand); |
| 876 | |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 877 | // ::new -> [C++] new-expression |
| 878 | // ::delete -> [C++] delete-expression |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 879 | SourceLocation CCLoc = ConsumeToken(); |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 880 | if (Tok.is(tok::kw_new)) |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 881 | return ParseCXXNewExpression(true, CCLoc); |
Chris Lattner | 74ba410 | 2009-01-04 22:52:14 +0000 | [diff] [blame] | 882 | if (Tok.is(tok::kw_delete)) |
Chris Lattner | 5b45473 | 2009-01-05 03:55:46 +0000 | [diff] [blame] | 883 | return ParseCXXDeleteExpression(true, CCLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 884 | |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 885 | // 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] | 886 | Diag(CCLoc, diag::err_expected_expression); |
Chris Lattner | a7bc7c8 | 2009-01-04 23:23:14 +0000 | [diff] [blame] | 887 | return ExprError(); |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 888 | } |
Sebastian Redl | fb4ccd7 | 2008-12-02 16:35:44 +0000 | [diff] [blame] | 889 | |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 890 | case tok::kw_new: // [C++] new-expression |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 891 | return ParseCXXNewExpression(false, Tok.getLocation()); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 892 | |
| 893 | case tok::kw_delete: // [C++] delete-expression |
Chris Lattner | 59232d3 | 2009-01-04 21:25:24 +0000 | [diff] [blame] | 894 | return ParseCXXDeleteExpression(false, Tok.getLocation()); |
Sebastian Redl | 4c5d320 | 2008-11-21 19:14:01 +0000 | [diff] [blame] | 895 | |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 896 | case tok::kw_noexcept: { // [C++0x] 'noexcept' '(' expression ')' |
| 897 | SourceLocation KeyLoc = ConsumeToken(); |
| 898 | SourceLocation LParen = Tok.getLocation(); |
| 899 | if (ExpectAndConsume(tok::l_paren, |
| 900 | diag::err_expected_lparen_after, "noexcept")) |
| 901 | return ExprError(); |
Sebastian Redl | bd7c849 | 2010-09-10 21:57:27 +0000 | [diff] [blame] | 902 | // C++ [expr.unary.noexcept]p1: |
| 903 | // The noexcept operator determines whether the evaluation of its operand, |
| 904 | // which is an unevaluated operand, can throw an exception. |
| 905 | EnterExpressionEvaluationContext Unevaluated(Actions, Sema::Unevaluated); |
Sebastian Redl | 02bc21a | 2010-09-10 20:55:37 +0000 | [diff] [blame] | 906 | ExprResult Result = ParseExpression(); |
| 907 | SourceLocation RParen = MatchRHSPunctuation(tok::r_paren, LParen); |
| 908 | if (!Result.isInvalid()) |
| 909 | Result = Actions.ActOnNoexceptExpr(KeyLoc, LParen, Result.take(), RParen); |
| 910 | return move(Result); |
| 911 | } |
| 912 | |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 913 | case tok::kw___is_pod: // [GNU] unary-type-trait |
| 914 | case tok::kw___is_class: |
| 915 | case tok::kw___is_enum: |
| 916 | case tok::kw___is_union: |
Eli Friedman | 1d954f6 | 2009-08-15 21:55:26 +0000 | [diff] [blame] | 917 | case tok::kw___is_empty: |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 918 | case tok::kw___is_polymorphic: |
Anders Carlsson | 67e4dd2 | 2009-03-22 01:52:17 +0000 | [diff] [blame] | 919 | case tok::kw___is_abstract: |
Sebastian Redl | ccf4350 | 2009-12-03 00:13:20 +0000 | [diff] [blame] | 920 | case tok::kw___is_literal: |
Anders Carlsson | 347ba89 | 2009-04-16 00:08:20 +0000 | [diff] [blame] | 921 | case tok::kw___has_trivial_constructor: |
Douglas Gregor | 5e03f9e | 2009-07-23 23:49:00 +0000 | [diff] [blame] | 922 | case tok::kw___has_trivial_copy: |
| 923 | case tok::kw___has_trivial_assign: |
Anders Carlsson | 072abef | 2009-04-17 02:34:54 +0000 | [diff] [blame] | 924 | case tok::kw___has_trivial_destructor: |
Sebastian Redl | c238f09 | 2010-08-31 04:59:00 +0000 | [diff] [blame] | 925 | case tok::kw___has_nothrow_assign: |
| 926 | case tok::kw___has_nothrow_copy: |
| 927 | case tok::kw___has_nothrow_constructor: |
Sebastian Redl | d4b25cb | 2010-09-02 23:19:42 +0000 | [diff] [blame] | 928 | case tok::kw___has_virtual_destructor: |
Sebastian Redl | 64b45f7 | 2009-01-05 20:52:13 +0000 | [diff] [blame] | 929 | return ParseUnaryTypeTrait(); |
| 930 | |
Chris Lattner | c97c204 | 2007-10-03 22:03:06 +0000 | [diff] [blame] | 931 | case tok::at: { |
| 932 | SourceLocation AtLoc = ConsumeToken(); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 933 | return ParseObjCAtExpression(AtLoc); |
Chris Lattner | c97c204 | 2007-10-03 22:03:06 +0000 | [diff] [blame] | 934 | } |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 935 | case tok::caret: |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 936 | return ParsePostfixExpressionSuffix(ParseBlockLiteralExpression()); |
Douglas Gregor | 64538cf | 2010-04-06 15:09:27 +0000 | [diff] [blame] | 937 | case tok::code_completion: |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 938 | Actions.CodeCompleteOrdinaryName(getCurScope(), Sema::PCC_Expression); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 939 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 64538cf | 2010-04-06 15:09:27 +0000 | [diff] [blame] | 940 | return ParseCastExpression(isUnaryExpression, isAddressOfOperand, |
| 941 | NotCastExpr, TypeOfCast); |
Chris Lattner | fdb548e | 2008-12-12 19:20:14 +0000 | [diff] [blame] | 942 | case tok::l_square: |
| 943 | // These can be followed by postfix-expr pieces. |
| 944 | if (getLang().ObjC1) |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 945 | return ParsePostfixExpressionSuffix(ParseObjCMessageExpression()); |
Douglas Gregor | 64538cf | 2010-04-06 15:09:27 +0000 | [diff] [blame] | 946 | // FALL THROUGH. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 947 | default: |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 948 | NotCastExpr = true; |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 949 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 950 | } |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 951 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 952 | // These can be followed by postfix-expr pieces. |
| 953 | if (Res.isInvalid()) return move(Res); |
| 954 | return ParsePostfixExpressionSuffix(Res.get()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 955 | } |
| 956 | |
| 957 | /// ParsePostfixExpressionSuffix - Once the leading part of a postfix-expression |
| 958 | /// is parsed, this method parses any suffixes that apply. |
| 959 | /// |
| 960 | /// postfix-expression: [C99 6.5.2] |
| 961 | /// primary-expression |
| 962 | /// postfix-expression '[' expression ']' |
| 963 | /// postfix-expression '(' argument-expression-list[opt] ')' |
| 964 | /// postfix-expression '.' identifier |
| 965 | /// postfix-expression '->' identifier |
| 966 | /// postfix-expression '++' |
| 967 | /// postfix-expression '--' |
| 968 | /// '(' type-name ')' '{' initializer-list '}' |
| 969 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 970 | /// |
| 971 | /// argument-expression-list: [C99 6.5.2] |
| 972 | /// argument-expression |
| 973 | /// argument-expression-list ',' assignment-expression |
| 974 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 975 | ExprResult |
| 976 | Parser::ParsePostfixExpressionSuffix(ExprResult LHS) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 977 | // Now that the primary-expression piece of the postfix-expression has been |
| 978 | // parsed, see if there are any postfix-expression pieces here. |
| 979 | SourceLocation Loc; |
| 980 | while (1) { |
| 981 | switch (Tok.getKind()) { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 982 | case tok::identifier: |
| 983 | // If we see identifier: after an expression, and we're not already in a |
| 984 | // message send, then this is probably a message send with a missing |
| 985 | // opening bracket '['. |
| 986 | if (getLang().ObjC1 && !InMessageExpression && |
Douglas Gregor | b65042d | 2010-09-15 14:54:45 +0000 | [diff] [blame^] | 987 | (NextToken().is(tok::colon) || NextToken().is(tok::r_square))) { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 988 | LHS = ParseObjCMessageExpressionBody(SourceLocation(), SourceLocation(), |
| 989 | ParsedType(), LHS.get()); |
| 990 | break; |
| 991 | } |
| 992 | |
| 993 | // Fall through; this isn't a message send. |
| 994 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 995 | default: // Not a postfix-expression suffix. |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 996 | return move(LHS); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 997 | case tok::l_square: { // postfix-expression: p-e '[' expression ']' |
Chris Lattner | c59cb38 | 2010-05-31 18:18:22 +0000 | [diff] [blame] | 998 | // If we have a array postfix expression that starts on a new line and |
| 999 | // Objective-C is enabled, it is highly likely that the user forgot a |
| 1000 | // semicolon after the base expression and that the array postfix-expr is |
| 1001 | // actually another message send. In this case, do some look-ahead to see |
| 1002 | // if the contents of the square brackets are obviously not a valid |
| 1003 | // expression and recover by pretending there is no suffix. |
| 1004 | if (getLang().ObjC1 && Tok.isAtStartOfLine() && |
| 1005 | isSimpleObjCMessageExpression()) |
Douglas Gregor | 1b730e8 | 2010-05-31 14:40:22 +0000 | [diff] [blame] | 1006 | return move(LHS); |
| 1007 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1008 | Loc = ConsumeBracket(); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1009 | ExprResult Idx(ParseExpression()); |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1010 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1011 | SourceLocation RLoc = Tok.getLocation(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1012 | |
| 1013 | if (!LHS.isInvalid() && !Idx.isInvalid() && Tok.is(tok::r_square)) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1014 | LHS = Actions.ActOnArraySubscriptExpr(getCurScope(), LHS.take(), Loc, |
| 1015 | Idx.take(), RLoc); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1016 | } else |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1017 | LHS = ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1018 | |
| 1019 | // Match the ']'. |
| 1020 | MatchRHSPunctuation(tok::r_square, Loc); |
| 1021 | break; |
| 1022 | } |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1023 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1024 | case tok::l_paren: { // p-e: p-e '(' argument-expression-list[opt] ')' |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1025 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1026 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1027 | ExprVector ArgExprs(Actions); |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1028 | CommaLocsTy CommaLocs; |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1029 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1030 | Loc = ConsumeParen(); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1031 | |
Douglas Gregor | bd6c76f | 2010-05-30 22:23:08 +0000 | [diff] [blame] | 1032 | if (LHS.isInvalid()) { |
| 1033 | SkipUntil(tok::r_paren); |
| 1034 | return ExprError(); |
| 1035 | } |
| 1036 | |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1037 | if (Tok.is(tok::code_completion)) { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1038 | Actions.CodeCompleteCall(getCurScope(), LHS.get(), 0, 0); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 1039 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1040 | } |
| 1041 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1042 | if (Tok.isNot(tok::r_paren)) { |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1043 | if (ParseExpressionList(ArgExprs, CommaLocs, &Sema::CodeCompleteCall, |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1044 | LHS.get())) { |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1045 | SkipUntil(tok::r_paren); |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1046 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1047 | } |
| 1048 | } |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1049 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1050 | // Match the ')'. |
Chris Lattner | 1721a2d | 2009-04-13 00:10:38 +0000 | [diff] [blame] | 1051 | if (Tok.isNot(tok::r_paren)) { |
| 1052 | MatchRHSPunctuation(tok::r_paren, Loc); |
| 1053 | return ExprError(); |
| 1054 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1055 | |
Chris Lattner | 1721a2d | 2009-04-13 00:10:38 +0000 | [diff] [blame] | 1056 | if (!LHS.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1057 | assert((ArgExprs.size() == 0 || ArgExprs.size()-1 == CommaLocs.size())&& |
| 1058 | "Unexpected number of commas!"); |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1059 | LHS = Actions.ActOnCallExpr(getCurScope(), LHS.take(), Loc, |
Douglas Gregor | a1a0478 | 2010-09-09 16:33:13 +0000 | [diff] [blame] | 1060 | move_arg(ArgExprs), Tok.getLocation()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1061 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1062 | |
Chris Lattner | 1721a2d | 2009-04-13 00:10:38 +0000 | [diff] [blame] | 1063 | ConsumeParen(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1064 | break; |
| 1065 | } |
Douglas Gregor | 3b6afbb | 2009-09-09 00:23:06 +0000 | [diff] [blame] | 1066 | case tok::arrow: |
| 1067 | case tok::period: { |
| 1068 | // postfix-expression: p-e '->' template[opt] id-expression |
| 1069 | // postfix-expression: p-e '.' template[opt] id-expression |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1070 | tok::TokenKind OpKind = Tok.getKind(); |
| 1071 | SourceLocation OpLoc = ConsumeToken(); // Eat the "." or "->" token. |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1072 | |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1073 | CXXScopeSpec SS; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1074 | ParsedType ObjectType; |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1075 | bool MayBePseudoDestructor = false; |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1076 | if (getLang().CPlusPlus && !LHS.isInvalid()) { |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1077 | LHS = Actions.ActOnStartCXXMemberReference(getCurScope(), LHS.take(), |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1078 | OpLoc, OpKind, ObjectType, |
| 1079 | MayBePseudoDestructor); |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1080 | if (LHS.isInvalid()) |
| 1081 | break; |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1082 | |
Douglas Gregor | edc9050 | 2010-02-25 04:46:04 +0000 | [diff] [blame] | 1083 | ParseOptionalCXXScopeSpecifier(SS, ObjectType, false, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1084 | &MayBePseudoDestructor); |
Douglas Gregor | 9f716e4 | 2010-05-27 15:25:59 +0000 | [diff] [blame] | 1085 | if (SS.isNotEmpty()) |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1086 | ObjectType = ParsedType(); |
Douglas Gregor | fe85ced | 2009-08-06 03:17:00 +0000 | [diff] [blame] | 1087 | } |
| 1088 | |
Douglas Gregor | 81b747b | 2009-09-17 21:32:03 +0000 | [diff] [blame] | 1089 | if (Tok.is(tok::code_completion)) { |
| 1090 | // Code completion for a member access expression. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1091 | Actions.CodeCompleteMemberReferenceExpr(getCurScope(), LHS.get(), |
Douglas Gregor | 81b747b | 2009-09-17 21:32:03 +0000 | [diff] [blame] | 1092 | OpLoc, OpKind == tok::arrow); |
| 1093 | |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 1094 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 81b747b | 2009-09-17 21:32:03 +0000 | [diff] [blame] | 1095 | } |
| 1096 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1097 | if (MayBePseudoDestructor && !LHS.isInvalid()) { |
| 1098 | LHS = ParseCXXPseudoDestructor(LHS.take(), OpLoc, OpKind, SS, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1099 | ObjectType); |
| 1100 | break; |
| 1101 | } |
| 1102 | |
| 1103 | // Either the action has told is that this cannot be a |
| 1104 | // pseudo-destructor expression (based on the type of base |
| 1105 | // expression), or we didn't see a '~' in the right place. We |
| 1106 | // can still parse a destructor name here, but in that case it |
| 1107 | // names a real destructor. |
Douglas Gregor | 2d1c214 | 2009-11-03 19:44:04 +0000 | [diff] [blame] | 1108 | UnqualifiedId Name; |
| 1109 | if (ParseUnqualifiedId(SS, |
| 1110 | /*EnteringContext=*/false, |
| 1111 | /*AllowDestructorName=*/true, |
| 1112 | /*AllowConstructorName=*/false, |
| 1113 | ObjectType, |
| 1114 | Name)) |
| 1115 | return ExprError(); |
| 1116 | |
| 1117 | if (!LHS.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1118 | LHS = Actions.ActOnMemberAccessExpr(getCurScope(), LHS.take(), OpLoc, |
Douglas Gregor | d4dca08 | 2010-02-24 18:44:31 +0000 | [diff] [blame] | 1119 | OpKind, SS, Name, ObjCImpDecl, |
Douglas Gregor | 2d1c214 | 2009-11-03 19:44:04 +0000 | [diff] [blame] | 1120 | Tok.is(tok::l_paren)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1121 | break; |
| 1122 | } |
| 1123 | case tok::plusplus: // postfix-expression: postfix-expression '++' |
| 1124 | case tok::minusminus: // postfix-expression: postfix-expression '--' |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1125 | if (!LHS.isInvalid()) { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1126 | LHS = Actions.ActOnPostfixUnaryOp(getCurScope(), Tok.getLocation(), |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1127 | Tok.getKind(), LHS.take()); |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1128 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1129 | ConsumeToken(); |
| 1130 | break; |
| 1131 | } |
| 1132 | } |
| 1133 | } |
| 1134 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1135 | /// ParseExprAfterTypeofSizeofAlignof - We parsed a typeof/sizeof/alignof and |
| 1136 | /// we are at the start of an expression or a parenthesized type-id. |
| 1137 | /// OpTok is the operand token (typeof/sizeof/alignof). Returns the expression |
| 1138 | /// (isCastExpr == false) or the type (isCastExpr == true). |
| 1139 | /// |
| 1140 | /// unary-expression: [C99 6.5.3] |
| 1141 | /// 'sizeof' unary-expression |
| 1142 | /// 'sizeof' '(' type-name ')' |
| 1143 | /// [GNU] '__alignof' unary-expression |
| 1144 | /// [GNU] '__alignof' '(' type-name ')' |
| 1145 | /// [C++0x] 'alignof' '(' type-id ')' |
| 1146 | /// |
| 1147 | /// [GNU] typeof-specifier: |
| 1148 | /// typeof ( expressions ) |
| 1149 | /// typeof ( type-name ) |
| 1150 | /// [GNU/C++] typeof unary-expression |
| 1151 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1152 | ExprResult |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1153 | Parser::ParseExprAfterTypeofSizeofAlignof(const Token &OpTok, |
| 1154 | bool &isCastExpr, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1155 | ParsedType &CastTy, |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1156 | SourceRange &CastRange) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1157 | |
| 1158 | assert((OpTok.is(tok::kw_typeof) || OpTok.is(tok::kw_sizeof) || |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1159 | OpTok.is(tok::kw___alignof) || OpTok.is(tok::kw_alignof)) && |
| 1160 | "Not a typeof/sizeof/alignof expression!"); |
| 1161 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1162 | ExprResult Operand; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1163 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1164 | // If the operand doesn't start with an '(', it must be an expression. |
| 1165 | if (Tok.isNot(tok::l_paren)) { |
| 1166 | isCastExpr = false; |
| 1167 | if (OpTok.is(tok::kw_typeof) && !getLang().CPlusPlus) { |
| 1168 | Diag(Tok,diag::err_expected_lparen_after_id) << OpTok.getIdentifierInfo(); |
| 1169 | return ExprError(); |
| 1170 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1171 | |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1172 | // C++0x [expr.sizeof]p1: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1173 | // [...] The operand is either an expression, which is an unevaluated |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1174 | // operand (Clause 5) [...] |
| 1175 | // |
| 1176 | // The GNU typeof and alignof extensions also behave as unevaluated |
| 1177 | // operands. |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 1178 | EnterExpressionEvaluationContext Unevaluated(Actions, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1179 | Sema::Unevaluated); |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1180 | Operand = ParseCastExpression(true/*isUnaryExpression*/); |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1181 | } else { |
| 1182 | // If it starts with a '(', we know that it is either a parenthesized |
| 1183 | // type-name, or it is a unary-expression that starts with a compound |
| 1184 | // literal, or starts with a primary-expression that is a parenthesized |
| 1185 | // expression. |
| 1186 | ParenParseOption ExprType = CastExpr; |
| 1187 | SourceLocation LParenLoc = Tok.getLocation(), RParenLoc; |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1188 | |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1189 | // C++0x [expr.sizeof]p1: |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1190 | // [...] The operand is either an expression, which is an unevaluated |
Douglas Gregor | e0762c9 | 2009-06-19 23:52:42 +0000 | [diff] [blame] | 1191 | // operand (Clause 5) [...] |
| 1192 | // |
| 1193 | // The GNU typeof and alignof extensions also behave as unevaluated |
| 1194 | // operands. |
Douglas Gregor | ac7610d | 2009-06-22 20:57:11 +0000 | [diff] [blame] | 1195 | EnterExpressionEvaluationContext Unevaluated(Actions, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1196 | Sema::Unevaluated); |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1197 | Operand = ParseParenExpression(ExprType, true/*stopIfCastExpr*/, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1198 | ParsedType(), CastTy, RParenLoc); |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1199 | CastRange = SourceRange(LParenLoc, RParenLoc); |
| 1200 | |
| 1201 | // If ParseParenExpression parsed a '(typename)' sequence only, then this is |
| 1202 | // a type. |
| 1203 | if (ExprType == CastExpr) { |
| 1204 | isCastExpr = true; |
| 1205 | return ExprEmpty(); |
| 1206 | } |
| 1207 | |
Douglas Gregor | 2a3a1bd | 2010-07-28 18:22:12 +0000 | [diff] [blame] | 1208 | if (getLang().CPlusPlus || OpTok.isNot(tok::kw_typeof)) { |
| 1209 | // GNU typeof in C requires the expression to be parenthesized. Not so for |
| 1210 | // sizeof/alignof or in C++. Therefore, the parenthesized expression is |
| 1211 | // the start of a unary-expression, but doesn't include any postfix |
| 1212 | // pieces. Parse these now if present. |
John McCall | 124300e | 2010-08-24 23:41:43 +0000 | [diff] [blame] | 1213 | if (!Operand.isInvalid()) |
| 1214 | Operand = ParsePostfixExpressionSuffix(Operand.get()); |
Douglas Gregor | 2a3a1bd | 2010-07-28 18:22:12 +0000 | [diff] [blame] | 1215 | } |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1216 | } |
| 1217 | |
| 1218 | // If we get here, the operand to the typeof/sizeof/alignof was an expresion. |
| 1219 | isCastExpr = false; |
| 1220 | return move(Operand); |
| 1221 | } |
| 1222 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1223 | |
| 1224 | /// ParseSizeofAlignofExpression - Parse a sizeof or alignof expression. |
| 1225 | /// unary-expression: [C99 6.5.3] |
| 1226 | /// 'sizeof' unary-expression |
| 1227 | /// 'sizeof' '(' type-name ')' |
| 1228 | /// [GNU] '__alignof' unary-expression |
| 1229 | /// [GNU] '__alignof' '(' type-name ')' |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 1230 | /// [C++0x] 'alignof' '(' type-id ')' |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1231 | ExprResult Parser::ParseSizeofAlignofExpression() { |
Douglas Gregor | 85bb3da | 2008-11-06 15:17:27 +0000 | [diff] [blame] | 1232 | assert((Tok.is(tok::kw_sizeof) || Tok.is(tok::kw___alignof) |
| 1233 | || Tok.is(tok::kw_alignof)) && |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1234 | "Not a sizeof/alignof expression!"); |
Chris Lattner | d217773 | 2007-07-20 16:59:19 +0000 | [diff] [blame] | 1235 | Token OpTok = Tok; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1236 | ConsumeToken(); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1237 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1238 | bool isCastExpr; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1239 | ParsedType CastTy; |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1240 | SourceRange CastRange; |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1241 | ExprResult Operand = ParseExprAfterTypeofSizeofAlignof(OpTok, |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1242 | isCastExpr, |
| 1243 | CastTy, |
| 1244 | CastRange); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1245 | |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1246 | if (isCastExpr) |
| 1247 | return Actions.ActOnSizeOfAlignOfExpr(OpTok.getLocation(), |
| 1248 | OpTok.is(tok::kw_sizeof), |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1249 | /*isType=*/true, |
| 1250 | CastTy.getAsOpaquePtr(), |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1251 | CastRange); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1252 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1253 | // 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] | 1254 | if (!Operand.isInvalid()) |
Sebastian Redl | 0518999 | 2008-11-11 17:56:53 +0000 | [diff] [blame] | 1255 | Operand = Actions.ActOnSizeOfAlignOfExpr(OpTok.getLocation(), |
| 1256 | OpTok.is(tok::kw_sizeof), |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 1257 | /*isType=*/false, |
Argyrios Kyrtzidis | 5ab0640 | 2009-05-22 10:22:50 +0000 | [diff] [blame] | 1258 | Operand.release(), CastRange); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1259 | return move(Operand); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1260 | } |
| 1261 | |
| 1262 | /// ParseBuiltinPrimaryExpression |
| 1263 | /// |
| 1264 | /// primary-expression: [C99 6.5.1] |
| 1265 | /// [GNU] '__builtin_va_arg' '(' assignment-expression ',' type-name ')' |
| 1266 | /// [GNU] '__builtin_offsetof' '(' type-name ',' offsetof-member-designator')' |
| 1267 | /// [GNU] '__builtin_choose_expr' '(' assign-expr ',' assign-expr ',' |
| 1268 | /// assign-expr ')' |
| 1269 | /// [GNU] '__builtin_types_compatible_p' '(' type-name ',' type-name ')' |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1270 | /// |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1271 | /// [GNU] offsetof-member-designator: |
| 1272 | /// [GNU] identifier |
| 1273 | /// [GNU] offsetof-member-designator '.' identifier |
| 1274 | /// [GNU] offsetof-member-designator '[' expression ']' |
| 1275 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1276 | ExprResult Parser::ParseBuiltinPrimaryExpression() { |
| 1277 | ExprResult Res; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1278 | const IdentifierInfo *BuiltinII = Tok.getIdentifierInfo(); |
| 1279 | |
| 1280 | tok::TokenKind T = Tok.getKind(); |
| 1281 | SourceLocation StartLoc = ConsumeToken(); // Eat the builtin identifier. |
| 1282 | |
| 1283 | // All of these start with an open paren. |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1284 | if (Tok.isNot(tok::l_paren)) |
| 1285 | return ExprError(Diag(Tok, diag::err_expected_lparen_after_id) |
| 1286 | << BuiltinII); |
| 1287 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1288 | SourceLocation LParenLoc = ConsumeParen(); |
| 1289 | // TODO: Build AST. |
| 1290 | |
| 1291 | switch (T) { |
| 1292 | default: assert(0 && "Not a builtin primary expression!"); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1293 | case tok::kw___builtin_va_arg: { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1294 | ExprResult Expr(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1295 | if (Expr.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1296 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1297 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1298 | } |
| 1299 | |
| 1300 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1301 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1302 | |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1303 | TypeResult Ty = ParseTypeName(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1304 | |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1305 | if (Tok.isNot(tok::r_paren)) { |
| 1306 | Diag(Tok, diag::err_expected_rparen); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1307 | return ExprError(); |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1308 | } |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1309 | if (Ty.isInvalid()) |
| 1310 | Res = ExprError(); |
| 1311 | else |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1312 | Res = Actions.ActOnVAArg(StartLoc, Expr.take(), Ty.get(), ConsumeParen()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1313 | break; |
Anders Carlsson | 7c50aca | 2007-10-15 20:28:48 +0000 | [diff] [blame] | 1314 | } |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1315 | case tok::kw___builtin_offsetof: { |
Chris Lattner | 9fddf0a | 2007-08-30 17:08:45 +0000 | [diff] [blame] | 1316 | SourceLocation TypeLoc = Tok.getLocation(); |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1317 | TypeResult Ty = ParseTypeName(); |
Chris Lattner | ca7102c | 2009-03-24 17:21:43 +0000 | [diff] [blame] | 1318 | if (Ty.isInvalid()) { |
| 1319 | SkipUntil(tok::r_paren); |
| 1320 | return ExprError(); |
| 1321 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1322 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1323 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1324 | return ExprError(); |
| 1325 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1326 | // We must have at least one identifier here. |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1327 | if (Tok.isNot(tok::identifier)) { |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1328 | Diag(Tok, diag::err_expected_ident); |
| 1329 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1330 | return ExprError(); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1331 | } |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1332 | |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1333 | // Keep track of the various subcomponents we see. |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1334 | llvm::SmallVector<Sema::OffsetOfComponent, 4> Comps; |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1335 | |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1336 | Comps.push_back(Sema::OffsetOfComponent()); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1337 | Comps.back().isBrackets = false; |
| 1338 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
| 1339 | Comps.back().LocStart = Comps.back().LocEnd = ConsumeToken(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1340 | |
Sebastian Redl | a55e52c | 2008-11-25 22:21:31 +0000 | [diff] [blame] | 1341 | // FIXME: This loop leaks the index expressions on error. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1342 | while (1) { |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1343 | if (Tok.is(tok::period)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1344 | // offsetof-member-designator: offsetof-member-designator '.' identifier |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1345 | Comps.push_back(Sema::OffsetOfComponent()); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1346 | Comps.back().isBrackets = false; |
| 1347 | Comps.back().LocStart = ConsumeToken(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1348 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1349 | if (Tok.isNot(tok::identifier)) { |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1350 | Diag(Tok, diag::err_expected_ident); |
| 1351 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1352 | return ExprError(); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1353 | } |
| 1354 | Comps.back().U.IdentInfo = Tok.getIdentifierInfo(); |
| 1355 | Comps.back().LocEnd = ConsumeToken(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1356 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1357 | } else if (Tok.is(tok::l_square)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1358 | // offsetof-member-designator: offsetof-member-design '[' expression ']' |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1359 | Comps.push_back(Sema::OffsetOfComponent()); |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1360 | Comps.back().isBrackets = true; |
| 1361 | Comps.back().LocStart = ConsumeBracket(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1362 | Res = ParseExpression(); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1363 | if (Res.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1364 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1365 | return move(Res); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1366 | } |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 1367 | Comps.back().U.E = Res.release(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1368 | |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1369 | Comps.back().LocEnd = |
| 1370 | MatchRHSPunctuation(tok::r_square, Comps.back().LocStart); |
Eli Friedman | 309fe0d | 2009-06-27 20:38:33 +0000 | [diff] [blame] | 1371 | } else { |
| 1372 | if (Tok.isNot(tok::r_paren)) { |
| 1373 | MatchRHSPunctuation(tok::r_paren, LParenLoc); |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1374 | Res = ExprError(); |
Eli Friedman | 309fe0d | 2009-06-27 20:38:33 +0000 | [diff] [blame] | 1375 | } else if (Ty.isInvalid()) { |
| 1376 | Res = ExprError(); |
| 1377 | } else { |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1378 | Res = Actions.ActOnBuiltinOffsetOf(getCurScope(), StartLoc, TypeLoc, |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1379 | Ty.get(), &Comps[0], |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1380 | Comps.size(), ConsumeParen()); |
Eli Friedman | 309fe0d | 2009-06-27 20:38:33 +0000 | [diff] [blame] | 1381 | } |
Chris Lattner | 6eb2109 | 2007-08-30 15:52:49 +0000 | [diff] [blame] | 1382 | break; |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1383 | } |
| 1384 | } |
| 1385 | break; |
Chris Lattner | f9aa3cb | 2007-08-30 15:51:11 +0000 | [diff] [blame] | 1386 | } |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1387 | case tok::kw___builtin_choose_expr: { |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1388 | ExprResult Cond(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1389 | if (Cond.isInvalid()) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1390 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1391 | return move(Cond); |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1392 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1393 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1394 | return ExprError(); |
| 1395 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1396 | ExprResult Expr1(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1397 | if (Expr1.isInvalid()) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1398 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1399 | return move(Expr1); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1400 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1401 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1402 | return ExprError(); |
| 1403 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1404 | ExprResult Expr2(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1405 | if (Expr2.isInvalid()) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1406 | SkipUntil(tok::r_paren); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1407 | return move(Expr2); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1408 | } |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1409 | if (Tok.isNot(tok::r_paren)) { |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1410 | Diag(Tok, diag::err_expected_rparen); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1411 | return ExprError(); |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1412 | } |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1413 | Res = Actions.ActOnChooseExpr(StartLoc, Cond.take(), Expr1.take(), |
| 1414 | Expr2.take(), ConsumeParen()); |
Chris Lattner | 6eb2109 | 2007-08-30 15:52:49 +0000 | [diff] [blame] | 1415 | break; |
Steve Naroff | d04fdd5 | 2007-08-03 21:21:27 +0000 | [diff] [blame] | 1416 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1417 | case tok::kw___builtin_types_compatible_p: |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1418 | TypeResult Ty1 = ParseTypeName(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1419 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1420 | if (ExpectAndConsume(tok::comma, diag::err_expected_comma, "",tok::r_paren)) |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1421 | return ExprError(); |
| 1422 | |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1423 | TypeResult Ty2 = ParseTypeName(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1424 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1425 | if (Tok.isNot(tok::r_paren)) { |
Steve Naroff | 363bcff | 2007-08-01 23:45:51 +0000 | [diff] [blame] | 1426 | Diag(Tok, diag::err_expected_rparen); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1427 | return ExprError(); |
Steve Naroff | 363bcff | 2007-08-01 23:45:51 +0000 | [diff] [blame] | 1428 | } |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1429 | |
| 1430 | if (Ty1.isInvalid() || Ty2.isInvalid()) |
| 1431 | Res = ExprError(); |
| 1432 | else |
| 1433 | Res = Actions.ActOnTypesCompatibleExpr(StartLoc, Ty1.get(), Ty2.get(), |
| 1434 | ConsumeParen()); |
Chris Lattner | 6eb2109 | 2007-08-30 15:52:49 +0000 | [diff] [blame] | 1435 | break; |
Sebastian Redl | 2f7ece7 | 2008-12-11 21:36:32 +0000 | [diff] [blame] | 1436 | } |
| 1437 | |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1438 | if (Res.isInvalid()) |
| 1439 | return ExprError(); |
| 1440 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1441 | // These can be followed by postfix-expr pieces because they are |
| 1442 | // primary-expressions. |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1443 | return ParsePostfixExpressionSuffix(Res.take()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1444 | } |
| 1445 | |
| 1446 | /// ParseParenExpression - This parses the unit that starts with a '(' token, |
| 1447 | /// 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] | 1448 | /// in ExprType. If stopIfCastExpr is true, it will only return the parsed type, |
| 1449 | /// not the parsed cast-expression. |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1450 | /// |
| 1451 | /// primary-expression: [C99 6.5.1] |
| 1452 | /// '(' expression ')' |
| 1453 | /// [GNU] '(' compound-statement ')' (if !ParenExprOnly) |
| 1454 | /// postfix-expression: [C99 6.5.2] |
| 1455 | /// '(' type-name ')' '{' initializer-list '}' |
| 1456 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 1457 | /// cast-expression: [C99 6.5.4] |
| 1458 | /// '(' type-name ')' cast-expression |
| 1459 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1460 | ExprResult |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1461 | Parser::ParseParenExpression(ParenParseOption &ExprType, bool stopIfCastExpr, |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1462 | ParsedType TypeOfCast, ParsedType &CastTy, |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1463 | SourceLocation &RParenLoc) { |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1464 | assert(Tok.is(tok::l_paren) && "Not a paren expr!"); |
Douglas Gregor | f02da89 | 2009-02-09 21:04:56 +0000 | [diff] [blame] | 1465 | GreaterThanIsOperatorScope G(GreaterThanIsOperator, true); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1466 | SourceLocation OpenLoc = ConsumeParen(); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1467 | ExprResult Result(true); |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1468 | bool isAmbiguousTypeId; |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1469 | CastTy = ParsedType(); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1470 | |
Douglas Gregor | 0268810 | 2010-09-14 23:59:36 +0000 | [diff] [blame] | 1471 | if (Tok.is(tok::code_completion)) { |
| 1472 | Actions.CodeCompleteOrdinaryName(getCurScope(), |
| 1473 | ExprType >= CompoundLiteral? Sema::PCC_ParenthesizedExpression |
| 1474 | : Sema::PCC_Expression); |
| 1475 | ConsumeCodeCompletionToken(); |
| 1476 | return ExprError(); |
| 1477 | } |
| 1478 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1479 | if (ExprType >= CompoundStmt && Tok.is(tok::l_brace)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1480 | Diag(Tok, diag::ext_gnu_statement_expr); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1481 | StmtResult Stmt(ParseCompoundStatement(0, true)); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1482 | ExprType = CompoundStmt; |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1483 | |
Chris Lattner | ab18c4c | 2007-07-24 16:58:17 +0000 | [diff] [blame] | 1484 | // If the substmt parsed correctly, build the AST node. |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1485 | if (!Stmt.isInvalid() && Tok.is(tok::r_paren)) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1486 | Result = Actions.ActOnStmtExpr(OpenLoc, Stmt.take(), Tok.getLocation()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1487 | |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1488 | } else if (ExprType >= CompoundLiteral && |
| 1489 | isTypeIdInParens(isAmbiguousTypeId)) { |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1490 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1491 | // Otherwise, this is a compound literal expression or cast expression. |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1492 | |
Argyrios Kyrtzidis | f58f45e | 2009-05-22 10:24:42 +0000 | [diff] [blame] | 1493 | // In C++, if the type-id is ambiguous we disambiguate based on context. |
| 1494 | // If stopIfCastExpr is true the context is a typeof/sizeof/alignof |
| 1495 | // in which case we should treat it as type-id. |
| 1496 | // if stopIfCastExpr is false, we need to determine the context past the |
| 1497 | // parens, so we defer to ParseCXXAmbiguousParenExpression for that. |
| 1498 | if (isAmbiguousTypeId && !stopIfCastExpr) |
| 1499 | return ParseCXXAmbiguousParenExpression(ExprType, CastTy, |
| 1500 | OpenLoc, RParenLoc); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1501 | |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1502 | TypeResult Ty; |
| 1503 | |
| 1504 | { |
| 1505 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1506 | Ty = ParseTypeName(); |
| 1507 | } |
| 1508 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1509 | // Match the ')'. |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1510 | if (Tok.is(tok::r_paren)) |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1511 | RParenLoc = ConsumeParen(); |
| 1512 | else |
| 1513 | MatchRHSPunctuation(tok::r_paren, OpenLoc); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1514 | |
Chris Lattner | 4e1d99a | 2007-10-09 17:41:39 +0000 | [diff] [blame] | 1515 | if (Tok.is(tok::l_brace)) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1516 | ExprType = CompoundLiteral; |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1517 | return ParseCompoundLiteralExpression(Ty.get(), OpenLoc, RParenLoc); |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1518 | } |
Sebastian Redl | b8a6aca | 2009-01-19 22:31:54 +0000 | [diff] [blame] | 1519 | |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1520 | if (ExprType == CastExpr) { |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1521 | // We parsed '(' type-name ')' and the thing after it wasn't a '{'. |
Douglas Gregor | 809070a | 2009-02-18 17:45:20 +0000 | [diff] [blame] | 1522 | |
| 1523 | if (Ty.isInvalid()) |
| 1524 | return ExprError(); |
| 1525 | |
| 1526 | CastTy = Ty.get(); |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1527 | |
Chris Lattner | a823d6a | 2010-04-12 06:27:57 +0000 | [diff] [blame] | 1528 | // Note that this doesn't parse the subsequent cast-expression, it just |
| 1529 | // returns the parsed type to the callee. |
| 1530 | if (stopIfCastExpr) |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1531 | return ExprResult(); |
Chris Lattner | eb483eb | 2010-04-11 08:28:14 +0000 | [diff] [blame] | 1532 | |
Chris Lattner | eb483eb | 2010-04-11 08:28:14 +0000 | [diff] [blame] | 1533 | // Reject the cast of super idiom in ObjC. |
| 1534 | if (Tok.is(tok::identifier) && getLang().ObjC1 && |
Chris Lattner | a823d6a | 2010-04-12 06:27:57 +0000 | [diff] [blame] | 1535 | Tok.getIdentifierInfo() == Ident_super && |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1536 | getCurScope()->isInObjcMethodScope() && |
Chris Lattner | 8b9f187 | 2010-04-12 17:09:27 +0000 | [diff] [blame] | 1537 | GetLookAheadToken(1).isNot(tok::period)) { |
Chris Lattner | eb483eb | 2010-04-11 08:28:14 +0000 | [diff] [blame] | 1538 | Diag(Tok.getLocation(), diag::err_illegal_super_cast) |
| 1539 | << SourceRange(OpenLoc, RParenLoc); |
| 1540 | return ExprError(); |
| 1541 | } |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1542 | |
| 1543 | // Parse the cast-expression that follows it next. |
| 1544 | // TODO: For cast expression with CastTy. |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1545 | Result = ParseCastExpression(false, false, CastTy); |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1546 | if (!Result.isInvalid()) |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1547 | Result = Actions.ActOnCastExpr(getCurScope(), OpenLoc, CastTy, RParenLoc, |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1548 | Result.take()); |
Argyrios Kyrtzidis | 0350ca5 | 2009-05-22 10:23:40 +0000 | [diff] [blame] | 1549 | return move(Result); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1550 | } |
Sebastian Redl | b8a6aca | 2009-01-19 22:31:54 +0000 | [diff] [blame] | 1551 | |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1552 | Diag(Tok, diag::err_expected_lbrace_in_compound_literal); |
| 1553 | return ExprError(); |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1554 | } else if (TypeOfCast) { |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1555 | // Parse the expression-list. |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1556 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1557 | |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1558 | ExprVector ArgExprs(Actions); |
| 1559 | CommaLocsTy CommaLocs; |
| 1560 | |
| 1561 | if (!ParseExpressionList(ArgExprs, CommaLocs)) { |
| 1562 | ExprType = SimpleExpr; |
Fariborz Jahanian | f88f7ab | 2009-11-25 01:26:41 +0000 | [diff] [blame] | 1563 | Result = Actions.ActOnParenOrParenListExpr(OpenLoc, Tok.getLocation(), |
| 1564 | move_arg(ArgExprs), TypeOfCast); |
Nate Begeman | 2ef13e5 | 2009-08-10 23:49:36 +0000 | [diff] [blame] | 1565 | } |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1566 | } else { |
Douglas Gregor | 0fbda68 | 2010-09-15 14:51:05 +0000 | [diff] [blame] | 1567 | InMessageExpressionRAIIObject InMessage(*this, false); |
| 1568 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1569 | Result = ParseExpression(); |
| 1570 | ExprType = SimpleExpr; |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1571 | if (!Result.isInvalid() && Tok.is(tok::r_paren)) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1572 | Result = Actions.ActOnParenExpr(OpenLoc, Tok.getLocation(), Result.take()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1573 | } |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1574 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1575 | // Match the ')'. |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1576 | if (Result.isInvalid()) { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1577 | SkipUntil(tok::r_paren); |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1578 | return ExprError(); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1579 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1580 | |
Chris Lattner | 42ece64 | 2008-12-12 06:00:12 +0000 | [diff] [blame] | 1581 | if (Tok.is(tok::r_paren)) |
| 1582 | RParenLoc = ConsumeParen(); |
| 1583 | else |
| 1584 | MatchRHSPunctuation(tok::r_paren, OpenLoc); |
Sebastian Redl | d8c4e15 | 2008-12-11 22:33:27 +0000 | [diff] [blame] | 1585 | |
| 1586 | return move(Result); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1587 | } |
| 1588 | |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1589 | /// ParseCompoundLiteralExpression - We have parsed the parenthesized type-name |
| 1590 | /// and we are at the left brace. |
| 1591 | /// |
| 1592 | /// postfix-expression: [C99 6.5.2] |
| 1593 | /// '(' type-name ')' '{' initializer-list '}' |
| 1594 | /// '(' type-name ')' '{' initializer-list ',' '}' |
| 1595 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1596 | ExprResult |
John McCall | b3d8748 | 2010-08-24 05:47:05 +0000 | [diff] [blame] | 1597 | Parser::ParseCompoundLiteralExpression(ParsedType Ty, |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1598 | SourceLocation LParenLoc, |
| 1599 | SourceLocation RParenLoc) { |
| 1600 | assert(Tok.is(tok::l_brace) && "Not a compound literal!"); |
| 1601 | if (!getLang().C99) // Compound literals don't exist in C90. |
| 1602 | Diag(LParenLoc, diag::ext_c99_compound_literal); |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1603 | ExprResult Result = ParseInitializer(); |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1604 | if (!Result.isInvalid() && Ty) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1605 | return Actions.ActOnCompoundLiteral(LParenLoc, Ty, RParenLoc, Result.take()); |
Argyrios Kyrtzidis | d974a7b | 2009-05-22 10:24:05 +0000 | [diff] [blame] | 1606 | return move(Result); |
| 1607 | } |
| 1608 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1609 | /// ParseStringLiteralExpression - This handles the various token types that |
| 1610 | /// form string literals, and also handles string concatenation [C99 5.1.1.2, |
| 1611 | /// translation phase #6]. |
| 1612 | /// |
| 1613 | /// primary-expression: [C99 6.5.1] |
| 1614 | /// string-literal |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1615 | ExprResult Parser::ParseStringLiteralExpression() { |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1616 | assert(isTokenStringLiteral() && "Not a string literal!"); |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 1617 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1618 | // String concat. Note that keywords like __func__ and __FUNCTION__ are not |
| 1619 | // considered to be strings for concatenation purposes. |
Chris Lattner | d217773 | 2007-07-20 16:59:19 +0000 | [diff] [blame] | 1620 | llvm::SmallVector<Token, 4> StringToks; |
Sebastian Redl | 20df9b7 | 2008-12-11 22:51:44 +0000 | [diff] [blame] | 1621 | |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1622 | do { |
| 1623 | StringToks.push_back(Tok); |
| 1624 | ConsumeStringToken(); |
| 1625 | } while (isTokenStringLiteral()); |
| 1626 | |
| 1627 | // Pass the set of string tokens, ready for concatenation, to the actions. |
Sean Hunt | 6cf7502 | 2010-08-30 17:47:05 +0000 | [diff] [blame] | 1628 | return Actions.ActOnStringLiteral(&StringToks[0], StringToks.size()); |
Reid Spencer | 5f016e2 | 2007-07-11 17:01:13 +0000 | [diff] [blame] | 1629 | } |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1630 | |
| 1631 | /// ParseExpressionList - Used for C/C++ (argument-)expression-list. |
| 1632 | /// |
| 1633 | /// argument-expression-list: |
| 1634 | /// assignment-expression |
| 1635 | /// argument-expression-list , assignment-expression |
| 1636 | /// |
| 1637 | /// [C++] expression-list: |
| 1638 | /// [C++] assignment-expression |
| 1639 | /// [C++] expression-list , assignment-expression |
| 1640 | /// |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 1641 | bool Parser::ParseExpressionList(llvm::SmallVectorImpl<Expr*> &Exprs, |
| 1642 | llvm::SmallVectorImpl<SourceLocation> &CommaLocs, |
John McCall | f312b1e | 2010-08-26 23:41:50 +0000 | [diff] [blame] | 1643 | void (Sema::*Completer)(Scope *S, |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 1644 | Expr *Data, |
| 1645 | Expr **Args, |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1646 | unsigned NumArgs), |
John McCall | ca0408f | 2010-08-23 06:44:23 +0000 | [diff] [blame] | 1647 | Expr *Data) { |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1648 | while (1) { |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1649 | if (Tok.is(tok::code_completion)) { |
| 1650 | if (Completer) |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1651 | (Actions.*Completer)(getCurScope(), Data, Exprs.data(), Exprs.size()); |
Douglas Gregor | dc84534 | 2010-05-25 05:58:43 +0000 | [diff] [blame] | 1652 | ConsumeCodeCompletionToken(); |
Douglas Gregor | 9c6a0e9 | 2009-09-22 15:41:20 +0000 | [diff] [blame] | 1653 | } |
| 1654 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1655 | ExprResult Expr(ParseAssignmentExpression()); |
Sebastian Redl | 0e9eabc | 2008-12-09 13:15:23 +0000 | [diff] [blame] | 1656 | if (Expr.isInvalid()) |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1657 | return true; |
Argyrios Kyrtzidis | 4fdc1ca | 2008-08-18 22:49:40 +0000 | [diff] [blame] | 1658 | |
Sebastian Redl | effa8d1 | 2008-12-10 00:02:53 +0000 | [diff] [blame] | 1659 | Exprs.push_back(Expr.release()); |
Argyrios Kyrtzidis | 0cd5b42 | 2008-08-16 20:03:01 +0000 | [diff] [blame] | 1660 | |
| 1661 | if (Tok.isNot(tok::comma)) |
| 1662 | return false; |
| 1663 | // Move to the next argument, remember where the comma was. |
| 1664 | CommaLocs.push_back(ConsumeToken()); |
| 1665 | } |
| 1666 | } |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1667 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1668 | /// ParseBlockId - Parse a block-id, which roughly looks like int (int x). |
| 1669 | /// |
| 1670 | /// [clang] block-id: |
| 1671 | /// [clang] specifier-qualifier-list block-declarator |
| 1672 | /// |
| 1673 | void Parser::ParseBlockId() { |
| 1674 | // Parse the specifier-qualifier-list piece. |
| 1675 | DeclSpec DS; |
| 1676 | ParseSpecifierQualifierList(DS); |
| 1677 | |
| 1678 | // Parse the block-declarator. |
| 1679 | Declarator DeclaratorInfo(DS, Declarator::BlockLiteralContext); |
| 1680 | ParseDeclarator(DeclaratorInfo); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1681 | |
Mike Stump | 6c92fa7 | 2009-04-29 21:40:37 +0000 | [diff] [blame] | 1682 | // We do this for: ^ __attribute__((noreturn)) {, as DS has the attributes. |
| 1683 | DeclaratorInfo.AddAttributes(DS.TakeAttributes(), |
| 1684 | SourceLocation()); |
| 1685 | |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1686 | if (Tok.is(tok::kw___attribute)) { |
| 1687 | SourceLocation Loc; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 1688 | AttributeList *AttrList = ParseGNUAttributes(&Loc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1689 | DeclaratorInfo.AddAttributes(AttrList, Loc); |
| 1690 | } |
| 1691 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1692 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1693 | Actions.ActOnBlockArguments(DeclaratorInfo, getCurScope()); |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1694 | } |
| 1695 | |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1696 | /// ParseBlockLiteralExpression - Parse a block literal, which roughly looks |
Steve Naroff | 17dab4f | 2008-09-16 23:11:46 +0000 | [diff] [blame] | 1697 | /// like ^(int x){ return x+1; } |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1698 | /// |
| 1699 | /// block-literal: |
| 1700 | /// [clang] '^' block-args[opt] compound-statement |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1701 | /// [clang] '^' block-id compound-statement |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1702 | /// [clang] block-args: |
| 1703 | /// [clang] '(' parameter-list ')' |
| 1704 | /// |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1705 | ExprResult Parser::ParseBlockLiteralExpression() { |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1706 | assert(Tok.is(tok::caret) && "block literal starts with ^"); |
| 1707 | SourceLocation CaretLoc = ConsumeToken(); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1708 | |
Chris Lattner | 6b91f00 | 2009-03-05 07:32:12 +0000 | [diff] [blame] | 1709 | PrettyStackTraceLoc CrashInfo(PP.getSourceManager(), CaretLoc, |
| 1710 | "block literal parsing"); |
| 1711 | |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1712 | // Enter a scope to hold everything within the block. This includes the |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1713 | // argument decls, decls within the compound expression, etc. This also |
| 1714 | // allows determining whether a variable reference inside the block is |
| 1715 | // within or outside of the block. |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1716 | ParseScope BlockScope(this, Scope::BlockScope | Scope::FnScope | |
| 1717 | Scope::BreakScope | Scope::ContinueScope | |
| 1718 | Scope::DeclScope); |
Steve Naroff | 090276f | 2008-10-10 01:28:17 +0000 | [diff] [blame] | 1719 | |
| 1720 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1721 | Actions.ActOnBlockStart(CaretLoc, getCurScope()); |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1722 | |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1723 | // Parse the return type if present. |
| 1724 | DeclSpec DS; |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1725 | Declarator ParamInfo(DS, Declarator::BlockLiteralContext); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1726 | // FIXME: Since the return type isn't actually parsed, it can't be used to |
| 1727 | // fill ParamInfo with an initial valid range, so do it manually. |
| 1728 | ParamInfo.SetSourceRange(SourceRange(Tok.getLocation(), Tok.getLocation())); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1729 | |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1730 | // If this block has arguments, parse them. There is no ambiguity here with |
| 1731 | // the expression case, because the expression case requires a parameter list. |
| 1732 | if (Tok.is(tok::l_paren)) { |
| 1733 | ParseParenDeclarator(ParamInfo); |
| 1734 | // Parse the pieces after the identifier as if we had "int(...)". |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1735 | // SetIdentifier sets the source range end, but in this case we're past |
| 1736 | // that location. |
| 1737 | SourceLocation Tmp = ParamInfo.getSourceRange().getEnd(); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1738 | ParamInfo.SetIdentifier(0, CaretLoc); |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1739 | ParamInfo.SetRangeEnd(Tmp); |
Chris Lattner | eaaebc7 | 2009-04-25 08:06:05 +0000 | [diff] [blame] | 1740 | if (ParamInfo.isInvalidType()) { |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1741 | // If there was an error parsing the arguments, they may have |
| 1742 | // tried to use ^(x+y) which requires an argument list. Just |
| 1743 | // skip the whole block literal. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1744 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1745 | return ExprError(); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1746 | } |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1747 | |
| 1748 | if (Tok.is(tok::kw___attribute)) { |
| 1749 | SourceLocation Loc; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 1750 | AttributeList *AttrList = ParseGNUAttributes(&Loc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1751 | ParamInfo.AddAttributes(AttrList, Loc); |
| 1752 | } |
| 1753 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1754 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1755 | Actions.ActOnBlockArguments(ParamInfo, getCurScope()); |
Mike Stump | aa771a8 | 2009-04-14 18:24:37 +0000 | [diff] [blame] | 1756 | } else if (!Tok.is(tok::l_brace)) { |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1757 | ParseBlockId(); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1758 | } else { |
| 1759 | // Otherwise, pretend we saw (void). |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1760 | ParamInfo.AddTypeInfo(DeclaratorChunk::getFunction(true, false, |
Douglas Gregor | 965acbb | 2009-02-18 07:07:28 +0000 | [diff] [blame] | 1761 | SourceLocation(), |
Sebastian Redl | 7dc8134 | 2009-04-29 17:30:04 +0000 | [diff] [blame] | 1762 | 0, 0, 0, |
Sebastian Redl | 3cc9726 | 2009-05-31 11:47:27 +0000 | [diff] [blame] | 1763 | false, SourceLocation(), |
| 1764 | false, 0, 0, 0, |
Argyrios Kyrtzidis | 82bf010 | 2009-08-19 23:14:54 +0000 | [diff] [blame] | 1765 | CaretLoc, CaretLoc, |
| 1766 | ParamInfo), |
Sebastian Redl | ab197ba | 2009-02-09 18:23:29 +0000 | [diff] [blame] | 1767 | CaretLoc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1768 | |
| 1769 | if (Tok.is(tok::kw___attribute)) { |
| 1770 | SourceLocation Loc; |
Sean Hunt | bbd37c6 | 2009-11-21 08:43:09 +0000 | [diff] [blame] | 1771 | AttributeList *AttrList = ParseGNUAttributes(&Loc); |
Mike Stump | 19c30c0 | 2009-04-29 19:03:13 +0000 | [diff] [blame] | 1772 | ParamInfo.AddAttributes(AttrList, Loc); |
| 1773 | } |
| 1774 | |
Mike Stump | 98eb8a7 | 2009-02-04 22:31:32 +0000 | [diff] [blame] | 1775 | // Inform sema that we are starting a block. |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1776 | Actions.ActOnBlockArguments(ParamInfo, getCurScope()); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1777 | } |
| 1778 | |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1779 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1780 | ExprResult Result(true); |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 1781 | if (!Tok.is(tok::l_brace)) { |
Fariborz Jahanian | ff03fbb | 2009-01-14 19:39:53 +0000 | [diff] [blame] | 1782 | // Saw something like: ^expr |
| 1783 | Diag(Tok, diag::err_expected_expression); |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1784 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
Fariborz Jahanian | ff03fbb | 2009-01-14 19:39:53 +0000 | [diff] [blame] | 1785 | return ExprError(); |
| 1786 | } |
Mike Stump | 1eb4433 | 2009-09-09 15:08:12 +0000 | [diff] [blame] | 1787 | |
John McCall | 60d7b3a | 2010-08-24 06:29:42 +0000 | [diff] [blame] | 1788 | StmtResult Stmt(ParseCompoundStatementBody()); |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 1789 | if (!Stmt.isInvalid()) |
John McCall | 9ae2f07 | 2010-08-23 23:25:46 +0000 | [diff] [blame] | 1790 | Result = Actions.ActOnBlockStmtExpr(CaretLoc, Stmt.take(), getCurScope()); |
Chris Lattner | 9af5500 | 2009-03-27 04:18:06 +0000 | [diff] [blame] | 1791 | else |
Douglas Gregor | 23c94db | 2010-07-02 17:43:08 +0000 | [diff] [blame] | 1792 | Actions.ActOnBlockError(CaretLoc, getCurScope()); |
Sebastian Redl | 1d92296 | 2008-12-13 15:32:12 +0000 | [diff] [blame] | 1793 | return move(Result); |
Steve Naroff | 296e8d5 | 2008-08-28 19:20:44 +0000 | [diff] [blame] | 1794 | } |