Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 1 | //===--- TokenAnnotator.cpp - Format C++ code -----------------------------===// |
| 2 | // |
| 3 | // The LLVM Compiler Infrastructure |
| 4 | // |
| 5 | // This file is distributed under the University of Illinois Open Source |
| 6 | // License. See LICENSE.TXT for details. |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | /// |
| 10 | /// \file |
| 11 | /// \brief This file implements a token annotator, i.e. creates |
| 12 | /// \c AnnotatedTokens out of \c FormatTokens with required extra information. |
| 13 | /// |
| 14 | //===----------------------------------------------------------------------===// |
| 15 | |
| 16 | #include "TokenAnnotator.h" |
| 17 | #include "clang/Basic/SourceManager.h" |
| 18 | #include "clang/Lex/Lexer.h" |
| 19 | |
| 20 | namespace clang { |
| 21 | namespace format { |
| 22 | |
Nico Weber | ee0feec | 2013-02-05 16:21:00 +0000 | [diff] [blame] | 23 | static bool isUnaryOperator(const AnnotatedToken &Tok) { |
| 24 | switch (Tok.FormatTok.Tok.getKind()) { |
| 25 | case tok::plus: |
| 26 | case tok::plusplus: |
| 27 | case tok::minus: |
| 28 | case tok::minusminus: |
| 29 | case tok::exclaim: |
| 30 | case tok::tilde: |
| 31 | case tok::kw_sizeof: |
| 32 | case tok::kw_alignof: |
| 33 | return true; |
| 34 | default: |
| 35 | return false; |
| 36 | } |
| 37 | } |
| 38 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 39 | static bool isBinaryOperator(const AnnotatedToken &Tok) { |
| 40 | // Comma is a binary operator, but does not behave as such wrt. formatting. |
| 41 | return getPrecedence(Tok) > prec::Comma; |
| 42 | } |
| 43 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 44 | // Returns the previous token ignoring comments. |
Nico Weber | 4ed7f3e | 2013-02-06 16:54:35 +0000 | [diff] [blame^] | 45 | static AnnotatedToken *getPreviousToken(AnnotatedToken &Tok) { |
| 46 | AnnotatedToken *PrevToken = Tok.Parent; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 47 | while (PrevToken != NULL && PrevToken->is(tok::comment)) |
| 48 | PrevToken = PrevToken->Parent; |
| 49 | return PrevToken; |
| 50 | } |
Nico Weber | 4ed7f3e | 2013-02-06 16:54:35 +0000 | [diff] [blame^] | 51 | static const AnnotatedToken *getPreviousToken(const AnnotatedToken &Tok) { |
| 52 | return getPreviousToken(const_cast<AnnotatedToken &>(Tok)); |
| 53 | } |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 54 | |
| 55 | // Returns the next token ignoring comments. |
| 56 | static const AnnotatedToken *getNextToken(const AnnotatedToken &Tok) { |
| 57 | if (Tok.Children.empty()) |
| 58 | return NULL; |
| 59 | const AnnotatedToken *NextToken = &Tok.Children[0]; |
| 60 | while (NextToken->is(tok::comment)) { |
| 61 | if (NextToken->Children.empty()) |
| 62 | return NULL; |
| 63 | NextToken = &NextToken->Children[0]; |
| 64 | } |
| 65 | return NextToken; |
| 66 | } |
| 67 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 68 | /// \brief A parser that gathers additional information about tokens. |
| 69 | /// |
| 70 | /// The \c TokenAnnotator tries to matches parenthesis and square brakets and |
| 71 | /// store a parenthesis levels. It also tries to resolve matching "<" and ">" |
| 72 | /// into template parameter lists. |
| 73 | class AnnotatingParser { |
| 74 | public: |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 75 | AnnotatingParser(SourceManager &SourceMgr, Lexer &Lex, AnnotatedLine &Line) |
| 76 | : SourceMgr(SourceMgr), Lex(Lex), Line(Line), CurrentToken(&Line.First), |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 77 | KeywordVirtualFound(false) { |
| 78 | Contexts.push_back(Context(1, /*IsExpression=*/ false)); |
| 79 | Contexts.back().LookForFunctionName = Line.MustBeDeclaration; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 80 | } |
| 81 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 82 | bool parseAngle() { |
| 83 | if (CurrentToken == NULL) |
| 84 | return false; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 85 | ScopedContextCreator ContextCreator(*this, 10); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 86 | AnnotatedToken *Left = CurrentToken->Parent; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 87 | Contexts.back().IsExpression = false; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 88 | while (CurrentToken != NULL) { |
| 89 | if (CurrentToken->is(tok::greater)) { |
| 90 | Left->MatchingParen = CurrentToken; |
| 91 | CurrentToken->MatchingParen = Left; |
| 92 | CurrentToken->Type = TT_TemplateCloser; |
| 93 | next(); |
| 94 | return true; |
| 95 | } |
| 96 | if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_square) || |
| 97 | CurrentToken->is(tok::r_brace)) |
| 98 | return false; |
| 99 | if (CurrentToken->is(tok::pipepipe) || CurrentToken->is(tok::ampamp) || |
| 100 | CurrentToken->is(tok::question) || CurrentToken->is(tok::colon)) |
| 101 | return false; |
| 102 | if (CurrentToken->is(tok::comma)) |
| 103 | ++Left->ParameterCount; |
| 104 | if (!consumeToken()) |
| 105 | return false; |
| 106 | } |
| 107 | return false; |
| 108 | } |
| 109 | |
| 110 | bool parseParens(bool LookForDecls = false) { |
| 111 | if (CurrentToken == NULL) |
| 112 | return false; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 113 | ScopedContextCreator ContextCreator(*this, 1); |
| 114 | |
| 115 | // FIXME: This is a bit of a hack. Do better. |
| 116 | Contexts.back().ColonIsForRangeExpr = |
| 117 | Contexts.size() == 2 && Contexts[0].ColonIsForRangeExpr; |
| 118 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 119 | bool StartsObjCMethodExpr = false; |
| 120 | AnnotatedToken *Left = CurrentToken->Parent; |
| 121 | if (CurrentToken->is(tok::caret)) { |
| 122 | // ^( starts a block. |
| 123 | Left->Type = TT_ObjCBlockLParen; |
| 124 | } else if (AnnotatedToken *MaybeSel = Left->Parent) { |
| 125 | // @selector( starts a selector. |
| 126 | if (MaybeSel->isObjCAtKeyword(tok::objc_selector) && MaybeSel->Parent && |
| 127 | MaybeSel->Parent->is(tok::at)) { |
| 128 | StartsObjCMethodExpr = true; |
| 129 | } |
| 130 | } |
| 131 | |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 132 | if (StartsObjCMethodExpr) { |
| 133 | Contexts.back().ColonIsObjCMethodExpr = true; |
| 134 | Left->Type = TT_ObjCMethodExpr; |
| 135 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 136 | |
| 137 | while (CurrentToken != NULL) { |
| 138 | // LookForDecls is set when "if (" has been seen. Check for |
| 139 | // 'identifier' '*' 'identifier' followed by not '=' -- this |
| 140 | // '*' has to be a binary operator but determineStarAmpUsage() will |
| 141 | // categorize it as an unary operator, so set the right type here. |
| 142 | if (LookForDecls && !CurrentToken->Children.empty()) { |
| 143 | AnnotatedToken &Prev = *CurrentToken->Parent; |
| 144 | AnnotatedToken &Next = CurrentToken->Children[0]; |
| 145 | if (Prev.Parent->is(tok::identifier) && |
| 146 | (Prev.is(tok::star) || Prev.is(tok::amp)) && |
| 147 | CurrentToken->is(tok::identifier) && Next.isNot(tok::equal)) { |
| 148 | Prev.Type = TT_BinaryOperator; |
| 149 | LookForDecls = false; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | if (CurrentToken->is(tok::r_paren)) { |
| 154 | Left->MatchingParen = CurrentToken; |
| 155 | CurrentToken->MatchingParen = Left; |
| 156 | |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 157 | if (StartsObjCMethodExpr) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 158 | CurrentToken->Type = TT_ObjCMethodExpr; |
| 159 | if (Contexts.back().FirstObjCSelectorName != NULL) { |
| 160 | Contexts.back().FirstObjCSelectorName->LongestObjCSelectorName = |
| 161 | Contexts.back().LongestObjCSelectorName; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 162 | } |
| 163 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 164 | |
| 165 | next(); |
| 166 | return true; |
| 167 | } |
| 168 | if (CurrentToken->is(tok::r_square) || CurrentToken->is(tok::r_brace)) |
| 169 | return false; |
| 170 | if (CurrentToken->is(tok::comma)) |
| 171 | ++Left->ParameterCount; |
| 172 | if (!consumeToken()) |
| 173 | return false; |
| 174 | } |
| 175 | return false; |
| 176 | } |
| 177 | |
| 178 | bool parseSquare() { |
| 179 | if (!CurrentToken) |
| 180 | return false; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 181 | ScopedContextCreator ContextCreator(*this, 10); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 182 | |
| 183 | // A '[' could be an index subscript (after an indentifier or after |
| 184 | // ')' or ']'), or it could be the start of an Objective-C method |
| 185 | // expression. |
| 186 | AnnotatedToken *Left = CurrentToken->Parent; |
Nico Weber | 4ed7f3e | 2013-02-06 16:54:35 +0000 | [diff] [blame^] | 187 | AnnotatedToken *Parent = getPreviousToken(*Left); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 188 | bool StartsObjCMethodExpr = |
Nico Weber | 4ed7f3e | 2013-02-06 16:54:35 +0000 | [diff] [blame^] | 189 | !Parent || Parent->is(tok::colon) || Parent->is(tok::l_square) || |
| 190 | Parent->is(tok::l_paren) || Parent->is(tok::kw_return) || |
| 191 | Parent->is(tok::kw_throw) || isUnaryOperator(*Parent) || |
| 192 | getBinOpPrecedence(Parent->FormatTok.Tok.getKind(), true, true) > |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 193 | prec::Unknown; |
| 194 | |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 195 | if (StartsObjCMethodExpr) { |
| 196 | Contexts.back().ColonIsObjCMethodExpr = true; |
| 197 | Left->Type = TT_ObjCMethodExpr; |
| 198 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 199 | |
| 200 | while (CurrentToken != NULL) { |
| 201 | if (CurrentToken->is(tok::r_square)) { |
| 202 | if (!CurrentToken->Children.empty() && |
| 203 | CurrentToken->Children[0].is(tok::l_paren)) { |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 204 | // An ObjC method call is rarely followed by an open parenthesis. |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 205 | // FIXME: Do we incorrectly label ":" with this? |
| 206 | StartsObjCMethodExpr = false; |
| 207 | Left->Type = TT_Unknown; |
| 208 | } |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 209 | if (StartsObjCMethodExpr) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 210 | CurrentToken->Type = TT_ObjCMethodExpr; |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 211 | // determineStarAmpUsage() thinks that '*' '[' is allocating an |
| 212 | // array of pointers, but if '[' starts a selector then '*' is a |
| 213 | // binary operator. |
Nico Weber | 4ed7f3e | 2013-02-06 16:54:35 +0000 | [diff] [blame^] | 214 | if (Parent != NULL && |
| 215 | (Parent->is(tok::star) || Parent->is(tok::amp)) && |
| 216 | Parent->Type == TT_PointerOrReference) |
| 217 | Parent->Type = TT_BinaryOperator; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 218 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 219 | Left->MatchingParen = CurrentToken; |
| 220 | CurrentToken->MatchingParen = Left; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 221 | if (Contexts.back().FirstObjCSelectorName != NULL) |
| 222 | Contexts.back().FirstObjCSelectorName->LongestObjCSelectorName = |
| 223 | Contexts.back().LongestObjCSelectorName; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 224 | next(); |
| 225 | return true; |
| 226 | } |
| 227 | if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_brace)) |
| 228 | return false; |
| 229 | if (CurrentToken->is(tok::comma)) |
| 230 | ++Left->ParameterCount; |
| 231 | if (!consumeToken()) |
| 232 | return false; |
| 233 | } |
| 234 | return false; |
| 235 | } |
| 236 | |
| 237 | bool parseBrace() { |
| 238 | // Lines are fine to end with '{'. |
| 239 | if (CurrentToken == NULL) |
| 240 | return true; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 241 | ScopedContextCreator ContextCreator(*this, 1); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 242 | AnnotatedToken *Left = CurrentToken->Parent; |
| 243 | while (CurrentToken != NULL) { |
| 244 | if (CurrentToken->is(tok::r_brace)) { |
| 245 | Left->MatchingParen = CurrentToken; |
| 246 | CurrentToken->MatchingParen = Left; |
| 247 | next(); |
| 248 | return true; |
| 249 | } |
| 250 | if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_square)) |
| 251 | return false; |
Daniel Jasper | f343cab | 2013-01-31 14:59:26 +0000 | [diff] [blame] | 252 | if (CurrentToken->is(tok::comma)) |
| 253 | ++Left->ParameterCount; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 254 | if (!consumeToken()) |
| 255 | return false; |
| 256 | } |
| 257 | return true; |
| 258 | } |
| 259 | |
| 260 | bool parseConditional() { |
| 261 | while (CurrentToken != NULL) { |
| 262 | if (CurrentToken->is(tok::colon)) { |
| 263 | CurrentToken->Type = TT_ConditionalExpr; |
| 264 | next(); |
| 265 | return true; |
| 266 | } |
| 267 | if (!consumeToken()) |
| 268 | return false; |
| 269 | } |
| 270 | return false; |
| 271 | } |
| 272 | |
| 273 | bool parseTemplateDeclaration() { |
| 274 | if (CurrentToken != NULL && CurrentToken->is(tok::less)) { |
| 275 | CurrentToken->Type = TT_TemplateOpener; |
| 276 | next(); |
| 277 | if (!parseAngle()) |
| 278 | return false; |
| 279 | CurrentToken->Parent->ClosesTemplateDeclaration = true; |
| 280 | return true; |
| 281 | } |
| 282 | return false; |
| 283 | } |
| 284 | |
| 285 | bool consumeToken() { |
| 286 | AnnotatedToken *Tok = CurrentToken; |
| 287 | next(); |
| 288 | switch (Tok->FormatTok.Tok.getKind()) { |
| 289 | case tok::plus: |
| 290 | case tok::minus: |
| 291 | // At the start of the line, +/- specific ObjectiveC method |
| 292 | // declarations. |
| 293 | if (Tok->Parent == NULL) |
| 294 | Tok->Type = TT_ObjCMethodSpecifier; |
| 295 | break; |
| 296 | case tok::colon: |
| 297 | // Colons from ?: are handled in parseConditional(). |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 298 | if (Tok->Parent->is(tok::r_paren)) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 299 | Tok->Type = TT_CtorInitializerColon; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 300 | } else if (Contexts.back().ColonIsObjCMethodExpr || |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 301 | Line.First.Type == TT_ObjCMethodSpecifier) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 302 | Tok->Type = TT_ObjCMethodExpr; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 303 | Tok->Parent->Type = TT_ObjCSelectorName; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 304 | if (Tok->Parent->FormatTok.TokenLength > |
| 305 | Contexts.back().LongestObjCSelectorName) |
| 306 | Contexts.back().LongestObjCSelectorName = |
| 307 | Tok->Parent->FormatTok.TokenLength; |
| 308 | if (Contexts.back().FirstObjCSelectorName == NULL) |
| 309 | Contexts.back().FirstObjCSelectorName = Tok->Parent; |
| 310 | } else if (Contexts.back().ColonIsForRangeExpr) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 311 | Tok->Type = TT_RangeBasedForLoopColon; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 312 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 313 | break; |
| 314 | case tok::kw_if: |
| 315 | case tok::kw_while: |
| 316 | if (CurrentToken != NULL && CurrentToken->is(tok::l_paren)) { |
| 317 | next(); |
| 318 | if (!parseParens(/*LookForDecls=*/ true)) |
| 319 | return false; |
| 320 | } |
| 321 | break; |
| 322 | case tok::kw_for: |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 323 | Contexts.back().ColonIsForRangeExpr = true; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 324 | next(); |
| 325 | if (!parseParens()) |
| 326 | return false; |
| 327 | break; |
| 328 | case tok::l_paren: |
| 329 | if (!parseParens()) |
| 330 | return false; |
| 331 | break; |
| 332 | case tok::l_square: |
| 333 | if (!parseSquare()) |
| 334 | return false; |
| 335 | break; |
| 336 | case tok::l_brace: |
| 337 | if (!parseBrace()) |
| 338 | return false; |
| 339 | break; |
| 340 | case tok::less: |
| 341 | if (parseAngle()) |
| 342 | Tok->Type = TT_TemplateOpener; |
| 343 | else { |
| 344 | Tok->Type = TT_BinaryOperator; |
| 345 | CurrentToken = Tok; |
| 346 | next(); |
| 347 | } |
| 348 | break; |
| 349 | case tok::r_paren: |
| 350 | case tok::r_square: |
| 351 | return false; |
| 352 | case tok::r_brace: |
| 353 | // Lines can start with '}'. |
| 354 | if (Tok->Parent != NULL) |
| 355 | return false; |
| 356 | break; |
| 357 | case tok::greater: |
| 358 | Tok->Type = TT_BinaryOperator; |
| 359 | break; |
| 360 | case tok::kw_operator: |
| 361 | if (CurrentToken != NULL && CurrentToken->is(tok::l_paren)) { |
| 362 | CurrentToken->Type = TT_OverloadedOperator; |
| 363 | next(); |
| 364 | if (CurrentToken != NULL && CurrentToken->is(tok::r_paren)) { |
| 365 | CurrentToken->Type = TT_OverloadedOperator; |
| 366 | next(); |
| 367 | } |
| 368 | } else { |
| 369 | while (CurrentToken != NULL && CurrentToken->isNot(tok::l_paren)) { |
| 370 | CurrentToken->Type = TT_OverloadedOperator; |
| 371 | next(); |
| 372 | } |
| 373 | } |
| 374 | break; |
| 375 | case tok::question: |
| 376 | parseConditional(); |
| 377 | break; |
| 378 | case tok::kw_template: |
| 379 | parseTemplateDeclaration(); |
| 380 | break; |
| 381 | default: |
| 382 | break; |
| 383 | } |
| 384 | return true; |
| 385 | } |
| 386 | |
| 387 | void parseIncludeDirective() { |
| 388 | next(); |
| 389 | if (CurrentToken != NULL && CurrentToken->is(tok::less)) { |
| 390 | next(); |
| 391 | while (CurrentToken != NULL) { |
| 392 | if (CurrentToken->isNot(tok::comment) || |
| 393 | !CurrentToken->Children.empty()) |
| 394 | CurrentToken->Type = TT_ImplicitStringLiteral; |
| 395 | next(); |
| 396 | } |
| 397 | } else { |
| 398 | while (CurrentToken != NULL) { |
| 399 | next(); |
| 400 | } |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | void parseWarningOrError() { |
| 405 | next(); |
| 406 | // We still want to format the whitespace left of the first token of the |
| 407 | // warning or error. |
| 408 | next(); |
| 409 | while (CurrentToken != NULL) { |
| 410 | CurrentToken->Type = TT_ImplicitStringLiteral; |
| 411 | next(); |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | void parsePreprocessorDirective() { |
| 416 | next(); |
| 417 | if (CurrentToken == NULL) |
| 418 | return; |
| 419 | // Hashes in the middle of a line can lead to any strange token |
| 420 | // sequence. |
| 421 | if (CurrentToken->FormatTok.Tok.getIdentifierInfo() == NULL) |
| 422 | return; |
| 423 | switch (CurrentToken->FormatTok.Tok.getIdentifierInfo()->getPPKeywordID()) { |
| 424 | case tok::pp_include: |
| 425 | case tok::pp_import: |
| 426 | parseIncludeDirective(); |
| 427 | break; |
| 428 | case tok::pp_error: |
| 429 | case tok::pp_warning: |
| 430 | parseWarningOrError(); |
| 431 | break; |
| 432 | default: |
| 433 | break; |
| 434 | } |
Daniel Jasper | 5b7e7b0 | 2013-02-05 09:34:14 +0000 | [diff] [blame] | 435 | while (CurrentToken != NULL) |
| 436 | next(); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 437 | } |
| 438 | |
| 439 | LineType parseLine() { |
| 440 | int PeriodsAndArrows = 0; |
| 441 | bool CanBeBuilderTypeStmt = true; |
| 442 | if (CurrentToken->is(tok::hash)) { |
| 443 | parsePreprocessorDirective(); |
| 444 | return LT_PreprocessorDirective; |
| 445 | } |
| 446 | while (CurrentToken != NULL) { |
| 447 | if (CurrentToken->is(tok::kw_virtual)) |
| 448 | KeywordVirtualFound = true; |
| 449 | if (CurrentToken->is(tok::period) || CurrentToken->is(tok::arrow)) |
| 450 | ++PeriodsAndArrows; |
| 451 | if (getPrecedence(*CurrentToken) > prec::Assignment && |
| 452 | CurrentToken->isNot(tok::less) && CurrentToken->isNot(tok::greater)) |
| 453 | CanBeBuilderTypeStmt = false; |
| 454 | if (!consumeToken()) |
| 455 | return LT_Invalid; |
| 456 | } |
| 457 | if (KeywordVirtualFound) |
| 458 | return LT_VirtualFunctionDecl; |
| 459 | |
| 460 | // Assume a builder-type call if there are 2 or more "." and "->". |
| 461 | if (PeriodsAndArrows >= 2 && CanBeBuilderTypeStmt) |
| 462 | return LT_BuilderTypeCall; |
| 463 | |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 464 | if (Line.First.Type == TT_ObjCMethodSpecifier) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 465 | if (Contexts.back().FirstObjCSelectorName != NULL) |
| 466 | Contexts.back().FirstObjCSelectorName->LongestObjCSelectorName = |
| 467 | Contexts.back().LongestObjCSelectorName; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 468 | return LT_ObjCMethodDecl; |
| 469 | } |
| 470 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 471 | return LT_Other; |
| 472 | } |
| 473 | |
| 474 | void next() { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 475 | if (CurrentToken != NULL) { |
| 476 | determineTokenType(*CurrentToken); |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 477 | CurrentToken->BindingStrength = Contexts.back().BindingStrength; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 478 | } |
| 479 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 480 | if (CurrentToken != NULL && !CurrentToken->Children.empty()) |
| 481 | CurrentToken = &CurrentToken->Children[0]; |
| 482 | else |
| 483 | CurrentToken = NULL; |
| 484 | } |
| 485 | |
| 486 | private: |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 487 | /// \brief A struct to hold information valid in a specific context, e.g. |
| 488 | /// a pair of parenthesis. |
| 489 | struct Context { |
| 490 | Context(unsigned BindingStrength, bool IsExpression) |
| 491 | : BindingStrength(BindingStrength), LongestObjCSelectorName(0), |
| 492 | ColonIsForRangeExpr(false), ColonIsObjCMethodExpr(false), |
| 493 | FirstObjCSelectorName(NULL), IsExpression(IsExpression), |
| 494 | LookForFunctionName(false) { |
| 495 | } |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 496 | |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 497 | unsigned BindingStrength; |
| 498 | unsigned LongestObjCSelectorName; |
| 499 | bool ColonIsForRangeExpr; |
| 500 | bool ColonIsObjCMethodExpr; |
| 501 | AnnotatedToken *FirstObjCSelectorName; |
| 502 | bool IsExpression; |
| 503 | bool LookForFunctionName; |
| 504 | }; |
| 505 | |
| 506 | /// \brief Puts a new \c Context onto the stack \c Contexts for the lifetime |
| 507 | /// of each instance. |
| 508 | struct ScopedContextCreator { |
| 509 | AnnotatingParser &P; |
| 510 | |
| 511 | ScopedContextCreator(AnnotatingParser &P, unsigned Increase) |
| 512 | : P(P) { |
| 513 | P.Contexts.push_back(Context( |
| 514 | P.Contexts.back().BindingStrength + Increase, |
| 515 | P.Contexts.back().IsExpression)); |
| 516 | } |
| 517 | |
| 518 | ~ScopedContextCreator() { P.Contexts.pop_back(); } |
| 519 | }; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 520 | |
| 521 | void determineTokenType(AnnotatedToken &Current) { |
| 522 | if (getPrecedence(Current) == prec::Assignment) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 523 | Contexts.back().IsExpression = true; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 524 | AnnotatedToken *Previous = Current.Parent; |
Daniel Jasper | 6b5ba8b | 2013-02-06 10:57:42 +0000 | [diff] [blame] | 525 | while (Previous != NULL && Previous->isNot(tok::comma)) { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 526 | if (Previous->Type == TT_BinaryOperator && |
| 527 | (Previous->is(tok::star) || Previous->is(tok::amp))) { |
| 528 | Previous->Type = TT_PointerOrReference; |
| 529 | } |
| 530 | Previous = Previous->Parent; |
| 531 | } |
| 532 | } |
| 533 | if (Current.is(tok::kw_return) || Current.is(tok::kw_throw) || |
| 534 | (Current.is(tok::l_paren) && !Line.MustBeDeclaration && |
| 535 | (Current.Parent == NULL || Current.Parent->isNot(tok::kw_for)))) |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 536 | Contexts.back().IsExpression = true; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 537 | |
| 538 | if (Current.Type == TT_Unknown) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 539 | if (Contexts.back().LookForFunctionName && Current.is(tok::l_paren)) { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 540 | findFunctionName(&Current); |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 541 | Contexts.back().LookForFunctionName = false; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 542 | } else if (Current.is(tok::star) || Current.is(tok::amp)) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 543 | Current.Type = |
| 544 | determineStarAmpUsage(Current, Contexts.back().IsExpression); |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 545 | } else if (Current.is(tok::minus) || Current.is(tok::plus) || |
| 546 | Current.is(tok::caret)) { |
| 547 | Current.Type = determinePlusMinusCaretUsage(Current); |
| 548 | } else if (Current.is(tok::minusminus) || Current.is(tok::plusplus)) { |
| 549 | Current.Type = determineIncrementUsage(Current); |
| 550 | } else if (Current.is(tok::exclaim)) { |
| 551 | Current.Type = TT_UnaryOperator; |
| 552 | } else if (isBinaryOperator(Current)) { |
| 553 | Current.Type = TT_BinaryOperator; |
| 554 | } else if (Current.is(tok::comment)) { |
| 555 | std::string Data(Lexer::getSpelling(Current.FormatTok.Tok, SourceMgr, |
| 556 | Lex.getLangOpts())); |
| 557 | if (StringRef(Data).startswith("//")) |
| 558 | Current.Type = TT_LineComment; |
| 559 | else |
| 560 | Current.Type = TT_BlockComment; |
| 561 | } else if (Current.is(tok::r_paren) && |
| 562 | (Current.Parent->Type == TT_PointerOrReference || |
| 563 | Current.Parent->Type == TT_TemplateCloser) && |
| 564 | (Current.Children.empty() || |
| 565 | (Current.Children[0].isNot(tok::equal) && |
| 566 | Current.Children[0].isNot(tok::semi) && |
| 567 | Current.Children[0].isNot(tok::l_brace)))) { |
| 568 | // FIXME: We need to get smarter and understand more cases of casts. |
| 569 | Current.Type = TT_CastRParen; |
| 570 | } else if (Current.is(tok::at) && Current.Children.size()) { |
| 571 | switch (Current.Children[0].FormatTok.Tok.getObjCKeywordID()) { |
| 572 | case tok::objc_interface: |
| 573 | case tok::objc_implementation: |
| 574 | case tok::objc_protocol: |
| 575 | Current.Type = TT_ObjCDecl; |
| 576 | break; |
| 577 | case tok::objc_property: |
| 578 | Current.Type = TT_ObjCProperty; |
| 579 | break; |
| 580 | default: |
| 581 | break; |
| 582 | } |
| 583 | } |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | /// \brief Starting from \p Current, this searches backwards for an |
| 588 | /// identifier which could be the start of a function name and marks it. |
| 589 | void findFunctionName(AnnotatedToken *Current) { |
| 590 | AnnotatedToken *Parent = Current->Parent; |
| 591 | while (Parent != NULL && Parent->Parent != NULL) { |
| 592 | if (Parent->is(tok::identifier) && |
| 593 | (Parent->Parent->is(tok::identifier) || |
| 594 | Parent->Parent->Type == TT_PointerOrReference || |
| 595 | Parent->Parent->Type == TT_TemplateCloser)) { |
| 596 | Parent->Type = TT_StartOfName; |
| 597 | break; |
| 598 | } |
| 599 | Parent = Parent->Parent; |
| 600 | } |
| 601 | } |
| 602 | |
| 603 | /// \brief Return the type of the given token assuming it is * or &. |
| 604 | TokenType |
| 605 | determineStarAmpUsage(const AnnotatedToken &Tok, bool IsExpression) { |
| 606 | const AnnotatedToken *PrevToken = getPreviousToken(Tok); |
| 607 | if (PrevToken == NULL) |
| 608 | return TT_UnaryOperator; |
| 609 | |
| 610 | const AnnotatedToken *NextToken = getNextToken(Tok); |
| 611 | if (NextToken == NULL) |
| 612 | return TT_Unknown; |
| 613 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 614 | if (PrevToken->is(tok::l_paren) || PrevToken->is(tok::l_square) || |
| 615 | PrevToken->is(tok::l_brace) || PrevToken->is(tok::comma) || |
| 616 | PrevToken->is(tok::kw_return) || PrevToken->is(tok::colon) || |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 617 | PrevToken->is(tok::equal) || PrevToken->Type == TT_BinaryOperator || |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 618 | PrevToken->Type == TT_UnaryOperator || PrevToken->Type == TT_CastRParen) |
| 619 | return TT_UnaryOperator; |
| 620 | |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 621 | if (NextToken->is(tok::l_square)) |
| 622 | return TT_PointerOrReference; |
| 623 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 624 | if (PrevToken->FormatTok.Tok.isLiteral() || PrevToken->is(tok::r_paren) || |
| 625 | PrevToken->is(tok::r_square) || NextToken->FormatTok.Tok.isLiteral() || |
Nico Weber | ee0feec | 2013-02-05 16:21:00 +0000 | [diff] [blame] | 626 | isUnaryOperator(*NextToken) || NextToken->is(tok::l_paren) || |
| 627 | NextToken->is(tok::l_square)) |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 628 | return TT_BinaryOperator; |
| 629 | |
| 630 | if (NextToken->is(tok::comma) || NextToken->is(tok::r_paren) || |
| 631 | NextToken->is(tok::greater)) |
| 632 | return TT_PointerOrReference; |
| 633 | |
| 634 | // It is very unlikely that we are going to find a pointer or reference type |
| 635 | // definition on the RHS of an assignment. |
| 636 | if (IsExpression) |
| 637 | return TT_BinaryOperator; |
| 638 | |
| 639 | return TT_PointerOrReference; |
| 640 | } |
| 641 | |
| 642 | TokenType determinePlusMinusCaretUsage(const AnnotatedToken &Tok) { |
| 643 | const AnnotatedToken *PrevToken = getPreviousToken(Tok); |
| 644 | if (PrevToken == NULL) |
| 645 | return TT_UnaryOperator; |
| 646 | |
| 647 | // Use heuristics to recognize unary operators. |
| 648 | if (PrevToken->is(tok::equal) || PrevToken->is(tok::l_paren) || |
| 649 | PrevToken->is(tok::comma) || PrevToken->is(tok::l_square) || |
| 650 | PrevToken->is(tok::question) || PrevToken->is(tok::colon) || |
| 651 | PrevToken->is(tok::kw_return) || PrevToken->is(tok::kw_case) || |
| 652 | PrevToken->is(tok::at) || PrevToken->is(tok::l_brace)) |
| 653 | return TT_UnaryOperator; |
| 654 | |
Nico Weber | ee0feec | 2013-02-05 16:21:00 +0000 | [diff] [blame] | 655 | // There can't be two consecutive binary operators. |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 656 | if (PrevToken->Type == TT_BinaryOperator) |
| 657 | return TT_UnaryOperator; |
| 658 | |
| 659 | // Fall back to marking the token as binary operator. |
| 660 | return TT_BinaryOperator; |
| 661 | } |
| 662 | |
| 663 | /// \brief Determine whether ++/-- are pre- or post-increments/-decrements. |
| 664 | TokenType determineIncrementUsage(const AnnotatedToken &Tok) { |
| 665 | const AnnotatedToken *PrevToken = getPreviousToken(Tok); |
| 666 | if (PrevToken == NULL) |
| 667 | return TT_UnaryOperator; |
| 668 | if (PrevToken->is(tok::r_paren) || PrevToken->is(tok::r_square) || |
| 669 | PrevToken->is(tok::identifier)) |
| 670 | return TT_TrailingUnaryOperator; |
| 671 | |
| 672 | return TT_UnaryOperator; |
| 673 | } |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame] | 674 | |
| 675 | SmallVector<Context, 8> Contexts; |
| 676 | |
| 677 | SourceManager &SourceMgr; |
| 678 | Lexer &Lex; |
| 679 | AnnotatedLine &Line; |
| 680 | AnnotatedToken *CurrentToken; |
| 681 | bool KeywordVirtualFound; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 682 | }; |
| 683 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 684 | void TokenAnnotator::annotate(AnnotatedLine &Line) { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 685 | AnnotatingParser Parser(SourceMgr, Lex, Line); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 686 | Line.Type = Parser.parseLine(); |
| 687 | if (Line.Type == LT_Invalid) |
| 688 | return; |
| 689 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 690 | if (Line.First.Type == TT_ObjCMethodSpecifier) |
| 691 | Line.Type = LT_ObjCMethodDecl; |
| 692 | else if (Line.First.Type == TT_ObjCDecl) |
| 693 | Line.Type = LT_ObjCDecl; |
| 694 | else if (Line.First.Type == TT_ObjCProperty) |
| 695 | Line.Type = LT_ObjCProperty; |
| 696 | |
| 697 | Line.First.SpaceRequiredBefore = true; |
| 698 | Line.First.MustBreakBefore = Line.First.FormatTok.MustBreakBefore; |
| 699 | Line.First.CanBreakBefore = Line.First.MustBreakBefore; |
| 700 | |
| 701 | Line.First.TotalLength = Line.First.FormatTok.TokenLength; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 702 | } |
| 703 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 704 | void TokenAnnotator::calculateFormattingInformation(AnnotatedLine &Line) { |
| 705 | if (Line.First.Children.empty()) |
| 706 | return; |
| 707 | AnnotatedToken *Current = &Line.First.Children[0]; |
| 708 | while (Current != NULL) { |
| 709 | Current->SpaceRequiredBefore = spaceRequiredBefore(Line, *Current); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 710 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 711 | if (Current->FormatTok.MustBreakBefore) { |
| 712 | Current->MustBreakBefore = true; |
| 713 | } else if (Current->Type == TT_LineComment) { |
| 714 | Current->MustBreakBefore = Current->FormatTok.NewlinesBefore > 0; |
| 715 | } else if ((Current->Parent->is(tok::comment) && |
| 716 | Current->FormatTok.NewlinesBefore > 0) || |
| 717 | (Current->is(tok::string_literal) && |
| 718 | Current->Parent->is(tok::string_literal))) { |
| 719 | Current->MustBreakBefore = true; |
| 720 | } else if (Current->is(tok::lessless) && !Current->Children.empty() && |
| 721 | Current->Parent->is(tok::string_literal) && |
| 722 | Current->Children[0].is(tok::string_literal)) { |
| 723 | Current->MustBreakBefore = true; |
| 724 | } else { |
| 725 | Current->MustBreakBefore = false; |
| 726 | } |
| 727 | Current->CanBreakBefore = |
| 728 | Current->MustBreakBefore || canBreakBefore(Line, *Current); |
| 729 | if (Current->MustBreakBefore) |
| 730 | Current->TotalLength = Current->Parent->TotalLength + Style.ColumnLimit; |
| 731 | else |
| 732 | Current->TotalLength = |
| 733 | Current->Parent->TotalLength + Current->FormatTok.TokenLength + |
| 734 | (Current->SpaceRequiredBefore ? 1 : 0); |
| 735 | // FIXME: Only calculate this if CanBreakBefore is true once static |
| 736 | // initializers etc. are sorted out. |
| 737 | // FIXME: Move magic numbers to a better place. |
| 738 | Current->SplitPenalty = |
| 739 | 20 * Current->BindingStrength + splitPenalty(Line, *Current); |
| 740 | |
| 741 | Current = Current->Children.empty() ? NULL : &Current->Children[0]; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 742 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 743 | } |
| 744 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 745 | unsigned TokenAnnotator::splitPenalty(const AnnotatedLine &Line, |
| 746 | const AnnotatedToken &Tok) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 747 | const AnnotatedToken &Left = *Tok.Parent; |
| 748 | const AnnotatedToken &Right = Tok; |
| 749 | |
| 750 | if (Left.is(tok::l_brace) && Right.isNot(tok::l_brace)) |
| 751 | return 50; |
| 752 | if (Left.is(tok::equal) && Right.is(tok::l_brace)) |
| 753 | return 150; |
| 754 | if (Left.is(tok::coloncolon)) |
| 755 | return 500; |
| 756 | |
| 757 | if (Left.Type == TT_RangeBasedForLoopColon) |
| 758 | return 5; |
| 759 | |
| 760 | if (Right.is(tok::arrow) || Right.is(tok::period)) { |
| 761 | if (Left.is(tok::r_paren) && Line.Type == LT_BuilderTypeCall) |
| 762 | return 5; // Should be smaller than breaking at a nested comma. |
| 763 | return 150; |
| 764 | } |
| 765 | |
| 766 | // In for-loops, prefer breaking at ',' and ';'. |
| 767 | if (Line.First.is(tok::kw_for) && |
| 768 | (Left.isNot(tok::comma) && Left.isNot(tok::semi))) |
| 769 | return 20; |
| 770 | |
Daniel Jasper | 8159d2f | 2013-02-04 07:30:30 +0000 | [diff] [blame] | 771 | if (Left.is(tok::semi)) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 772 | return 0; |
Daniel Jasper | 8159d2f | 2013-02-04 07:30:30 +0000 | [diff] [blame] | 773 | if (Left.is(tok::comma)) |
| 774 | return 1; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 775 | |
| 776 | // In Objective-C method expressions, prefer breaking before "param:" over |
| 777 | // breaking after it. |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 778 | if (Right.Type == TT_ObjCSelectorName) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 779 | return 0; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 780 | if (Left.is(tok::colon) && Left.Type == TT_ObjCMethodExpr) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 781 | return 20; |
| 782 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 783 | if (Left.is(tok::l_paren) || Left.is(tok::l_square) || |
| 784 | Left.Type == TT_TemplateOpener) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 785 | return 20; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 786 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 787 | if (Right.is(tok::lessless)) |
| 788 | return prec::Shift; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 789 | if (Left.Type == TT_ConditionalExpr) |
| 790 | return prec::Assignment; |
| 791 | prec::Level Level = getPrecedence(Left); |
| 792 | |
| 793 | if (Level != prec::Unknown) |
| 794 | return Level; |
| 795 | |
| 796 | return 3; |
| 797 | } |
| 798 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 799 | bool TokenAnnotator::spaceRequiredBetween(const AnnotatedLine &Line, |
| 800 | const AnnotatedToken &Left, |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 801 | const AnnotatedToken &Right) { |
| 802 | if (Right.is(tok::hashhash)) |
| 803 | return Left.is(tok::hash); |
| 804 | if (Left.is(tok::hashhash) || Left.is(tok::hash)) |
| 805 | return Right.is(tok::hash); |
| 806 | if (Right.is(tok::r_paren) || Right.is(tok::semi) || Right.is(tok::comma)) |
| 807 | return false; |
| 808 | if (Right.is(tok::less) && |
| 809 | (Left.is(tok::kw_template) || |
| 810 | (Line.Type == LT_ObjCDecl && Style.ObjCSpaceBeforeProtocolList))) |
| 811 | return true; |
| 812 | if (Left.is(tok::arrow) || Right.is(tok::arrow)) |
| 813 | return false; |
| 814 | if (Left.is(tok::exclaim) || Left.is(tok::tilde)) |
| 815 | return false; |
| 816 | if (Left.is(tok::at) && |
| 817 | (Right.is(tok::identifier) || Right.is(tok::string_literal) || |
| 818 | Right.is(tok::char_constant) || Right.is(tok::numeric_constant) || |
| 819 | Right.is(tok::l_paren) || Right.is(tok::l_brace) || |
| 820 | Right.is(tok::kw_true) || Right.is(tok::kw_false))) |
| 821 | return false; |
| 822 | if (Left.is(tok::coloncolon)) |
| 823 | return false; |
| 824 | if (Right.is(tok::coloncolon)) |
| 825 | return Left.isNot(tok::identifier) && Left.isNot(tok::greater); |
| 826 | if (Left.is(tok::less) || Right.is(tok::greater) || Right.is(tok::less)) |
| 827 | return false; |
| 828 | if (Right.is(tok::amp) || Right.is(tok::star)) |
| 829 | return Left.FormatTok.Tok.isLiteral() || |
| 830 | (Left.isNot(tok::star) && Left.isNot(tok::amp) && |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 831 | !Style.PointerBindsToType); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 832 | if (Left.is(tok::amp) || Left.is(tok::star)) |
| 833 | return Right.FormatTok.Tok.isLiteral() || |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 834 | Style.PointerBindsToType; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 835 | if (Right.is(tok::star) && Left.is(tok::l_paren)) |
| 836 | return false; |
| 837 | if (Left.is(tok::l_square) || Right.is(tok::r_square)) |
| 838 | return false; |
| 839 | if (Right.is(tok::l_square) && Right.Type != TT_ObjCMethodExpr) |
| 840 | return false; |
| 841 | if (Left.is(tok::period) || Right.is(tok::period)) |
| 842 | return false; |
| 843 | if (Left.is(tok::colon)) |
| 844 | return Left.Type != TT_ObjCMethodExpr; |
| 845 | if (Right.is(tok::colon)) |
| 846 | return Right.Type != TT_ObjCMethodExpr; |
| 847 | if (Left.is(tok::l_paren)) |
| 848 | return false; |
| 849 | if (Right.is(tok::l_paren)) { |
| 850 | return Line.Type == LT_ObjCDecl || Left.is(tok::kw_if) || |
| 851 | Left.is(tok::kw_for) || Left.is(tok::kw_while) || |
| 852 | Left.is(tok::kw_switch) || Left.is(tok::kw_return) || |
| 853 | Left.is(tok::kw_catch) || Left.is(tok::kw_new) || |
| 854 | Left.is(tok::kw_delete); |
| 855 | } |
| 856 | if (Left.is(tok::at) && |
| 857 | Right.FormatTok.Tok.getObjCKeywordID() != tok::objc_not_keyword) |
| 858 | return false; |
| 859 | if (Left.is(tok::l_brace) && Right.is(tok::r_brace)) |
| 860 | return false; |
| 861 | return true; |
| 862 | } |
| 863 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 864 | bool TokenAnnotator::spaceRequiredBefore(const AnnotatedLine &Line, |
| 865 | const AnnotatedToken &Tok) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 866 | if (Line.Type == LT_ObjCMethodDecl) { |
| 867 | if (Tok.is(tok::identifier) && !Tok.Children.empty() && |
| 868 | Tok.Children[0].is(tok::colon) && Tok.Parent->is(tok::identifier)) |
| 869 | return true; |
| 870 | if (Tok.is(tok::colon)) |
| 871 | return false; |
| 872 | if (Tok.Parent->Type == TT_ObjCMethodSpecifier) |
| 873 | return true; |
| 874 | if (Tok.Parent->is(tok::r_paren) && Tok.is(tok::identifier)) |
| 875 | // Don't space between ')' and <id> |
| 876 | return false; |
| 877 | if (Tok.Parent->is(tok::colon) && Tok.is(tok::l_paren)) |
| 878 | // Don't space between ':' and '(' |
| 879 | return false; |
| 880 | } |
| 881 | if (Line.Type == LT_ObjCProperty && |
| 882 | (Tok.is(tok::equal) || Tok.Parent->is(tok::equal))) |
| 883 | return false; |
| 884 | |
| 885 | if (Tok.Parent->is(tok::comma)) |
| 886 | return true; |
| 887 | if (Tok.Type == TT_CtorInitializerColon || Tok.Type == TT_ObjCBlockLParen) |
| 888 | return true; |
| 889 | if (Tok.Type == TT_OverloadedOperator) |
| 890 | return Tok.is(tok::identifier) || Tok.is(tok::kw_new) || |
| 891 | Tok.is(tok::kw_delete) || Tok.is(tok::kw_bool); |
| 892 | if (Tok.Parent->Type == TT_OverloadedOperator) |
| 893 | return false; |
| 894 | if (Tok.is(tok::colon)) |
| 895 | return Line.First.isNot(tok::kw_case) && !Tok.Children.empty() && |
| 896 | Tok.Type != TT_ObjCMethodExpr; |
| 897 | if (Tok.Parent->Type == TT_UnaryOperator || Tok.Parent->Type == TT_CastRParen) |
| 898 | return false; |
| 899 | if (Tok.Type == TT_UnaryOperator) |
| 900 | return Tok.Parent->isNot(tok::l_paren) && |
| 901 | Tok.Parent->isNot(tok::l_square) && Tok.Parent->isNot(tok::at) && |
| 902 | (Tok.Parent->isNot(tok::colon) || |
| 903 | Tok.Parent->Type != TT_ObjCMethodExpr); |
| 904 | if (Tok.Parent->is(tok::greater) && Tok.is(tok::greater)) { |
| 905 | return Tok.Type == TT_TemplateCloser && Tok.Parent->Type == |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 906 | TT_TemplateCloser && Style.Standard != FormatStyle::LS_Cpp11; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 907 | } |
| 908 | if (Tok.Type == TT_BinaryOperator || Tok.Parent->Type == TT_BinaryOperator) |
| 909 | return true; |
| 910 | if (Tok.Parent->Type == TT_TemplateCloser && Tok.is(tok::l_paren)) |
| 911 | return false; |
| 912 | if (Tok.is(tok::less) && Line.First.is(tok::hash)) |
| 913 | return true; |
| 914 | if (Tok.Type == TT_TrailingUnaryOperator) |
| 915 | return false; |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 916 | return spaceRequiredBetween(Line, *Tok.Parent, Tok); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 917 | } |
| 918 | |
Daniel Jasper | 8ff690a | 2013-02-06 14:22:40 +0000 | [diff] [blame] | 919 | bool TokenAnnotator::canBreakBefore(const AnnotatedLine &Line, |
| 920 | const AnnotatedToken &Right) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 921 | const AnnotatedToken &Left = *Right.Parent; |
| 922 | if (Line.Type == LT_ObjCMethodDecl) { |
| 923 | if (Right.is(tok::identifier) && !Right.Children.empty() && |
| 924 | Right.Children[0].is(tok::colon) && Left.is(tok::identifier)) |
| 925 | return true; |
| 926 | if (Right.is(tok::identifier) && Left.is(tok::l_paren) && |
| 927 | Left.Parent->is(tok::colon)) |
| 928 | // Don't break this identifier as ':' or identifier |
| 929 | // before it will break. |
| 930 | return false; |
| 931 | if (Right.is(tok::colon) && Left.is(tok::identifier) && Left.CanBreakBefore) |
| 932 | // Don't break at ':' if identifier before it can beak. |
| 933 | return false; |
| 934 | } |
| 935 | if (Right.Type == TT_StartOfName && Style.AllowReturnTypeOnItsOwnLine) |
| 936 | return true; |
| 937 | if (Right.is(tok::colon) && Right.Type == TT_ObjCMethodExpr) |
| 938 | return false; |
| 939 | if (Left.is(tok::colon) && Left.Type == TT_ObjCMethodExpr) |
| 940 | return true; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 941 | if (Right.Type == TT_ObjCSelectorName) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 942 | return true; |
| 943 | if (Left.ClosesTemplateDeclaration) |
| 944 | return true; |
| 945 | if (Right.Type == TT_ConditionalExpr || Right.is(tok::question)) |
| 946 | return true; |
| 947 | if (Left.Type == TT_RangeBasedForLoopColon) |
| 948 | return true; |
| 949 | if (Left.Type == TT_PointerOrReference || Left.Type == TT_TemplateCloser || |
| 950 | Left.Type == TT_UnaryOperator || Left.Type == TT_ConditionalExpr || |
| 951 | Left.is(tok::question)) |
| 952 | return false; |
| 953 | if (Left.is(tok::equal) && Line.Type == LT_VirtualFunctionDecl) |
| 954 | return false; |
| 955 | |
| 956 | if (Right.Type == TT_LineComment) |
| 957 | // We rely on MustBreakBefore being set correctly here as we should not |
| 958 | // change the "binding" behavior of a comment. |
| 959 | return false; |
| 960 | |
| 961 | // Allow breaking after a trailing 'const', e.g. after a method declaration, |
| 962 | // unless it is follow by ';', '{' or '='. |
| 963 | if (Left.is(tok::kw_const) && Left.Parent != NULL && |
| 964 | Left.Parent->is(tok::r_paren)) |
| 965 | return Right.isNot(tok::l_brace) && Right.isNot(tok::semi) && |
| 966 | Right.isNot(tok::equal); |
| 967 | |
| 968 | // We only break before r_brace if there was a corresponding break before |
| 969 | // the l_brace, which is tracked by BreakBeforeClosingBrace. |
| 970 | if (Right.is(tok::r_brace)) |
| 971 | return false; |
| 972 | |
| 973 | if (Right.is(tok::r_paren) || Right.is(tok::greater)) |
| 974 | return false; |
| 975 | return (isBinaryOperator(Left) && Left.isNot(tok::lessless)) || |
| 976 | Left.is(tok::comma) || Right.is(tok::lessless) || |
| 977 | Right.is(tok::arrow) || Right.is(tok::period) || |
| 978 | Right.is(tok::colon) || Left.is(tok::coloncolon) || |
| 979 | Left.is(tok::semi) || Left.is(tok::l_brace) || |
| 980 | (Left.is(tok::r_paren) && Left.Type != TT_CastRParen && |
| 981 | Right.is(tok::identifier)) || |
| 982 | (Left.is(tok::l_paren) && !Right.is(tok::r_paren)) || |
| 983 | (Left.is(tok::l_square) && !Right.is(tok::r_square)); |
| 984 | } |
| 985 | |
| 986 | } // namespace format |
| 987 | } // namespace clang |