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