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. |
| 45 | static const AnnotatedToken *getPreviousToken(const AnnotatedToken &Tok) { |
| 46 | const AnnotatedToken *PrevToken = Tok.Parent; |
| 47 | while (PrevToken != NULL && PrevToken->is(tok::comment)) |
| 48 | PrevToken = PrevToken->Parent; |
| 49 | return PrevToken; |
| 50 | } |
| 51 | |
| 52 | // Returns the next token ignoring comments. |
| 53 | static const AnnotatedToken *getNextToken(const AnnotatedToken &Tok) { |
| 54 | if (Tok.Children.empty()) |
| 55 | return NULL; |
| 56 | const AnnotatedToken *NextToken = &Tok.Children[0]; |
| 57 | while (NextToken->is(tok::comment)) { |
| 58 | if (NextToken->Children.empty()) |
| 59 | return NULL; |
| 60 | NextToken = &NextToken->Children[0]; |
| 61 | } |
| 62 | return NextToken; |
| 63 | } |
| 64 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 65 | /// \brief A parser that gathers additional information about tokens. |
| 66 | /// |
| 67 | /// The \c TokenAnnotator tries to matches parenthesis and square brakets and |
| 68 | /// store a parenthesis levels. It also tries to resolve matching "<" and ">" |
| 69 | /// into template parameter lists. |
| 70 | class AnnotatingParser { |
| 71 | public: |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 72 | AnnotatingParser(SourceManager &SourceMgr, Lexer &Lex, AnnotatedLine &Line) |
| 73 | : SourceMgr(SourceMgr), Lex(Lex), Line(Line), CurrentToken(&Line.First), |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 74 | KeywordVirtualFound(false) { |
| 75 | Contexts.push_back(Context(1, /*IsExpression=*/ false)); |
| 76 | Contexts.back().LookForFunctionName = Line.MustBeDeclaration; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 77 | } |
| 78 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 79 | bool parseAngle() { |
| 80 | if (CurrentToken == NULL) |
| 81 | return false; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 82 | ScopedContextCreator ContextCreator(*this, 10); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 83 | AnnotatedToken *Left = CurrentToken->Parent; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 84 | Contexts.back().IsExpression = false; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 85 | while (CurrentToken != NULL) { |
| 86 | if (CurrentToken->is(tok::greater)) { |
| 87 | Left->MatchingParen = CurrentToken; |
| 88 | CurrentToken->MatchingParen = Left; |
| 89 | CurrentToken->Type = TT_TemplateCloser; |
| 90 | next(); |
| 91 | return true; |
| 92 | } |
| 93 | if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_square) || |
| 94 | CurrentToken->is(tok::r_brace)) |
| 95 | return false; |
| 96 | if (CurrentToken->is(tok::pipepipe) || CurrentToken->is(tok::ampamp) || |
| 97 | CurrentToken->is(tok::question) || CurrentToken->is(tok::colon)) |
| 98 | return false; |
| 99 | if (CurrentToken->is(tok::comma)) |
| 100 | ++Left->ParameterCount; |
| 101 | if (!consumeToken()) |
| 102 | return false; |
| 103 | } |
| 104 | return false; |
| 105 | } |
| 106 | |
| 107 | bool parseParens(bool LookForDecls = false) { |
| 108 | if (CurrentToken == NULL) |
| 109 | return false; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 110 | ScopedContextCreator ContextCreator(*this, 1); |
| 111 | |
| 112 | // FIXME: This is a bit of a hack. Do better. |
| 113 | Contexts.back().ColonIsForRangeExpr = |
| 114 | Contexts.size() == 2 && Contexts[0].ColonIsForRangeExpr; |
| 115 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 116 | bool StartsObjCMethodExpr = false; |
| 117 | AnnotatedToken *Left = CurrentToken->Parent; |
| 118 | if (CurrentToken->is(tok::caret)) { |
| 119 | // ^( starts a block. |
| 120 | Left->Type = TT_ObjCBlockLParen; |
| 121 | } else if (AnnotatedToken *MaybeSel = Left->Parent) { |
| 122 | // @selector( starts a selector. |
| 123 | if (MaybeSel->isObjCAtKeyword(tok::objc_selector) && MaybeSel->Parent && |
| 124 | MaybeSel->Parent->is(tok::at)) { |
| 125 | StartsObjCMethodExpr = true; |
| 126 | } |
| 127 | } |
| 128 | |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 129 | if (StartsObjCMethodExpr) { |
| 130 | Contexts.back().ColonIsObjCMethodExpr = true; |
| 131 | Left->Type = TT_ObjCMethodExpr; |
| 132 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 133 | |
| 134 | while (CurrentToken != NULL) { |
| 135 | // LookForDecls is set when "if (" has been seen. Check for |
| 136 | // 'identifier' '*' 'identifier' followed by not '=' -- this |
| 137 | // '*' has to be a binary operator but determineStarAmpUsage() will |
| 138 | // categorize it as an unary operator, so set the right type here. |
| 139 | if (LookForDecls && !CurrentToken->Children.empty()) { |
| 140 | AnnotatedToken &Prev = *CurrentToken->Parent; |
| 141 | AnnotatedToken &Next = CurrentToken->Children[0]; |
| 142 | if (Prev.Parent->is(tok::identifier) && |
| 143 | (Prev.is(tok::star) || Prev.is(tok::amp)) && |
| 144 | CurrentToken->is(tok::identifier) && Next.isNot(tok::equal)) { |
| 145 | Prev.Type = TT_BinaryOperator; |
| 146 | LookForDecls = false; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | if (CurrentToken->is(tok::r_paren)) { |
| 151 | Left->MatchingParen = CurrentToken; |
| 152 | CurrentToken->MatchingParen = Left; |
| 153 | |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 154 | if (StartsObjCMethodExpr) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 155 | CurrentToken->Type = TT_ObjCMethodExpr; |
| 156 | if (Contexts.back().FirstObjCSelectorName != NULL) { |
| 157 | Contexts.back().FirstObjCSelectorName->LongestObjCSelectorName = |
| 158 | Contexts.back().LongestObjCSelectorName; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 159 | } |
| 160 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 161 | |
| 162 | next(); |
| 163 | return true; |
| 164 | } |
| 165 | if (CurrentToken->is(tok::r_square) || CurrentToken->is(tok::r_brace)) |
| 166 | return false; |
| 167 | if (CurrentToken->is(tok::comma)) |
| 168 | ++Left->ParameterCount; |
| 169 | if (!consumeToken()) |
| 170 | return false; |
| 171 | } |
| 172 | return false; |
| 173 | } |
| 174 | |
| 175 | bool parseSquare() { |
| 176 | if (!CurrentToken) |
| 177 | return false; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 178 | ScopedContextCreator ContextCreator(*this, 10); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 179 | |
| 180 | // A '[' could be an index subscript (after an indentifier or after |
| 181 | // ')' or ']'), or it could be the start of an Objective-C method |
| 182 | // expression. |
| 183 | AnnotatedToken *Left = CurrentToken->Parent; |
| 184 | bool StartsObjCMethodExpr = |
| 185 | !Left->Parent || Left->Parent->is(tok::colon) || |
| 186 | Left->Parent->is(tok::l_square) || Left->Parent->is(tok::l_paren) || |
| 187 | Left->Parent->is(tok::kw_return) || Left->Parent->is(tok::kw_throw) || |
Nico Weber | ee0feec | 2013-02-05 16:21:00 +0000 | [diff] [blame] | 188 | isUnaryOperator(*Left->Parent) || |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 189 | getBinOpPrecedence(Left->Parent->FormatTok.Tok.getKind(), true, true) > |
| 190 | prec::Unknown; |
| 191 | |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 192 | if (StartsObjCMethodExpr) { |
| 193 | Contexts.back().ColonIsObjCMethodExpr = true; |
| 194 | Left->Type = TT_ObjCMethodExpr; |
| 195 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 196 | |
| 197 | while (CurrentToken != NULL) { |
| 198 | if (CurrentToken->is(tok::r_square)) { |
| 199 | if (!CurrentToken->Children.empty() && |
| 200 | CurrentToken->Children[0].is(tok::l_paren)) { |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 201 | // An ObjC method call is rarely followed by an open parenthesis. |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 202 | // FIXME: Do we incorrectly label ":" with this? |
| 203 | StartsObjCMethodExpr = false; |
| 204 | Left->Type = TT_Unknown; |
| 205 | } |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 206 | if (StartsObjCMethodExpr) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 207 | CurrentToken->Type = TT_ObjCMethodExpr; |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 208 | // determineStarAmpUsage() thinks that '*' '[' is allocating an |
| 209 | // array of pointers, but if '[' starts a selector then '*' is a |
| 210 | // binary operator. |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 211 | if (Left->Parent != NULL && |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 212 | (Left->Parent->is(tok::star) || Left->Parent->is(tok::amp)) && |
| 213 | Left->Parent->Type == TT_PointerOrReference) |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 214 | Left->Parent->Type = TT_BinaryOperator; |
| 215 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 216 | Left->MatchingParen = CurrentToken; |
| 217 | CurrentToken->MatchingParen = Left; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 218 | if (Contexts.back().FirstObjCSelectorName != NULL) |
| 219 | Contexts.back().FirstObjCSelectorName->LongestObjCSelectorName = |
| 220 | Contexts.back().LongestObjCSelectorName; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 221 | next(); |
| 222 | return true; |
| 223 | } |
| 224 | if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_brace)) |
| 225 | return false; |
| 226 | if (CurrentToken->is(tok::comma)) |
| 227 | ++Left->ParameterCount; |
| 228 | if (!consumeToken()) |
| 229 | return false; |
| 230 | } |
| 231 | return false; |
| 232 | } |
| 233 | |
| 234 | bool parseBrace() { |
| 235 | // Lines are fine to end with '{'. |
| 236 | if (CurrentToken == NULL) |
| 237 | return true; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 238 | ScopedContextCreator ContextCreator(*this, 1); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 239 | AnnotatedToken *Left = CurrentToken->Parent; |
| 240 | while (CurrentToken != NULL) { |
| 241 | if (CurrentToken->is(tok::r_brace)) { |
| 242 | Left->MatchingParen = CurrentToken; |
| 243 | CurrentToken->MatchingParen = Left; |
| 244 | next(); |
| 245 | return true; |
| 246 | } |
| 247 | if (CurrentToken->is(tok::r_paren) || CurrentToken->is(tok::r_square)) |
| 248 | return false; |
Daniel Jasper | f343cab | 2013-01-31 14:59:26 +0000 | [diff] [blame] | 249 | if (CurrentToken->is(tok::comma)) |
| 250 | ++Left->ParameterCount; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 251 | if (!consumeToken()) |
| 252 | return false; |
| 253 | } |
| 254 | return true; |
| 255 | } |
| 256 | |
| 257 | bool parseConditional() { |
| 258 | while (CurrentToken != NULL) { |
| 259 | if (CurrentToken->is(tok::colon)) { |
| 260 | CurrentToken->Type = TT_ConditionalExpr; |
| 261 | next(); |
| 262 | return true; |
| 263 | } |
| 264 | if (!consumeToken()) |
| 265 | return false; |
| 266 | } |
| 267 | return false; |
| 268 | } |
| 269 | |
| 270 | bool parseTemplateDeclaration() { |
| 271 | if (CurrentToken != NULL && CurrentToken->is(tok::less)) { |
| 272 | CurrentToken->Type = TT_TemplateOpener; |
| 273 | next(); |
| 274 | if (!parseAngle()) |
| 275 | return false; |
| 276 | CurrentToken->Parent->ClosesTemplateDeclaration = true; |
| 277 | return true; |
| 278 | } |
| 279 | return false; |
| 280 | } |
| 281 | |
| 282 | bool consumeToken() { |
| 283 | AnnotatedToken *Tok = CurrentToken; |
| 284 | next(); |
| 285 | switch (Tok->FormatTok.Tok.getKind()) { |
| 286 | case tok::plus: |
| 287 | case tok::minus: |
| 288 | // At the start of the line, +/- specific ObjectiveC method |
| 289 | // declarations. |
| 290 | if (Tok->Parent == NULL) |
| 291 | Tok->Type = TT_ObjCMethodSpecifier; |
| 292 | break; |
| 293 | case tok::colon: |
| 294 | // Colons from ?: are handled in parseConditional(). |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 295 | if (Tok->Parent->is(tok::r_paren)) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 296 | Tok->Type = TT_CtorInitializerColon; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 297 | } else if (Contexts.back().ColonIsObjCMethodExpr || |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 298 | Line.First.Type == TT_ObjCMethodSpecifier) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 299 | Tok->Type = TT_ObjCMethodExpr; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 300 | Tok->Parent->Type = TT_ObjCSelectorName; |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 301 | if (Tok->Parent->FormatTok.TokenLength > |
| 302 | Contexts.back().LongestObjCSelectorName) |
| 303 | Contexts.back().LongestObjCSelectorName = |
| 304 | Tok->Parent->FormatTok.TokenLength; |
| 305 | if (Contexts.back().FirstObjCSelectorName == NULL) |
| 306 | Contexts.back().FirstObjCSelectorName = Tok->Parent; |
| 307 | } else if (Contexts.back().ColonIsForRangeExpr) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 308 | Tok->Type = TT_RangeBasedForLoopColon; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 309 | } |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 310 | break; |
| 311 | case tok::kw_if: |
| 312 | case tok::kw_while: |
| 313 | if (CurrentToken != NULL && CurrentToken->is(tok::l_paren)) { |
| 314 | next(); |
| 315 | if (!parseParens(/*LookForDecls=*/ true)) |
| 316 | return false; |
| 317 | } |
| 318 | break; |
| 319 | case tok::kw_for: |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 320 | Contexts.back().ColonIsForRangeExpr = true; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 321 | next(); |
| 322 | if (!parseParens()) |
| 323 | return false; |
| 324 | break; |
| 325 | case tok::l_paren: |
| 326 | if (!parseParens()) |
| 327 | return false; |
| 328 | break; |
| 329 | case tok::l_square: |
| 330 | if (!parseSquare()) |
| 331 | return false; |
| 332 | break; |
| 333 | case tok::l_brace: |
| 334 | if (!parseBrace()) |
| 335 | return false; |
| 336 | break; |
| 337 | case tok::less: |
| 338 | if (parseAngle()) |
| 339 | Tok->Type = TT_TemplateOpener; |
| 340 | else { |
| 341 | Tok->Type = TT_BinaryOperator; |
| 342 | CurrentToken = Tok; |
| 343 | next(); |
| 344 | } |
| 345 | break; |
| 346 | case tok::r_paren: |
| 347 | case tok::r_square: |
| 348 | return false; |
| 349 | case tok::r_brace: |
| 350 | // Lines can start with '}'. |
| 351 | if (Tok->Parent != NULL) |
| 352 | return false; |
| 353 | break; |
| 354 | case tok::greater: |
| 355 | Tok->Type = TT_BinaryOperator; |
| 356 | break; |
| 357 | case tok::kw_operator: |
| 358 | if (CurrentToken != NULL && CurrentToken->is(tok::l_paren)) { |
| 359 | CurrentToken->Type = TT_OverloadedOperator; |
| 360 | next(); |
| 361 | if (CurrentToken != NULL && CurrentToken->is(tok::r_paren)) { |
| 362 | CurrentToken->Type = TT_OverloadedOperator; |
| 363 | next(); |
| 364 | } |
| 365 | } else { |
| 366 | while (CurrentToken != NULL && CurrentToken->isNot(tok::l_paren)) { |
| 367 | CurrentToken->Type = TT_OverloadedOperator; |
| 368 | next(); |
| 369 | } |
| 370 | } |
| 371 | break; |
| 372 | case tok::question: |
| 373 | parseConditional(); |
| 374 | break; |
| 375 | case tok::kw_template: |
| 376 | parseTemplateDeclaration(); |
| 377 | break; |
| 378 | default: |
| 379 | break; |
| 380 | } |
| 381 | return true; |
| 382 | } |
| 383 | |
| 384 | void parseIncludeDirective() { |
| 385 | next(); |
| 386 | if (CurrentToken != NULL && CurrentToken->is(tok::less)) { |
| 387 | next(); |
| 388 | while (CurrentToken != NULL) { |
| 389 | if (CurrentToken->isNot(tok::comment) || |
| 390 | !CurrentToken->Children.empty()) |
| 391 | CurrentToken->Type = TT_ImplicitStringLiteral; |
| 392 | next(); |
| 393 | } |
| 394 | } else { |
| 395 | while (CurrentToken != NULL) { |
| 396 | next(); |
| 397 | } |
| 398 | } |
| 399 | } |
| 400 | |
| 401 | void parseWarningOrError() { |
| 402 | next(); |
| 403 | // We still want to format the whitespace left of the first token of the |
| 404 | // warning or error. |
| 405 | next(); |
| 406 | while (CurrentToken != NULL) { |
| 407 | CurrentToken->Type = TT_ImplicitStringLiteral; |
| 408 | next(); |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | void parsePreprocessorDirective() { |
| 413 | next(); |
| 414 | if (CurrentToken == NULL) |
| 415 | return; |
| 416 | // Hashes in the middle of a line can lead to any strange token |
| 417 | // sequence. |
| 418 | if (CurrentToken->FormatTok.Tok.getIdentifierInfo() == NULL) |
| 419 | return; |
| 420 | switch (CurrentToken->FormatTok.Tok.getIdentifierInfo()->getPPKeywordID()) { |
| 421 | case tok::pp_include: |
| 422 | case tok::pp_import: |
| 423 | parseIncludeDirective(); |
| 424 | break; |
| 425 | case tok::pp_error: |
| 426 | case tok::pp_warning: |
| 427 | parseWarningOrError(); |
| 428 | break; |
| 429 | default: |
| 430 | break; |
| 431 | } |
Daniel Jasper | 5b7e7b0 | 2013-02-05 09:34:14 +0000 | [diff] [blame] | 432 | while (CurrentToken != NULL) |
| 433 | next(); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 434 | } |
| 435 | |
| 436 | LineType parseLine() { |
| 437 | int PeriodsAndArrows = 0; |
| 438 | bool CanBeBuilderTypeStmt = true; |
| 439 | if (CurrentToken->is(tok::hash)) { |
| 440 | parsePreprocessorDirective(); |
| 441 | return LT_PreprocessorDirective; |
| 442 | } |
| 443 | while (CurrentToken != NULL) { |
| 444 | if (CurrentToken->is(tok::kw_virtual)) |
| 445 | KeywordVirtualFound = true; |
| 446 | if (CurrentToken->is(tok::period) || CurrentToken->is(tok::arrow)) |
| 447 | ++PeriodsAndArrows; |
| 448 | if (getPrecedence(*CurrentToken) > prec::Assignment && |
| 449 | CurrentToken->isNot(tok::less) && CurrentToken->isNot(tok::greater)) |
| 450 | CanBeBuilderTypeStmt = false; |
| 451 | if (!consumeToken()) |
| 452 | return LT_Invalid; |
| 453 | } |
| 454 | if (KeywordVirtualFound) |
| 455 | return LT_VirtualFunctionDecl; |
| 456 | |
| 457 | // Assume a builder-type call if there are 2 or more "." and "->". |
| 458 | if (PeriodsAndArrows >= 2 && CanBeBuilderTypeStmt) |
| 459 | return LT_BuilderTypeCall; |
| 460 | |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 461 | if (Line.First.Type == TT_ObjCMethodSpecifier) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 462 | if (Contexts.back().FirstObjCSelectorName != NULL) |
| 463 | Contexts.back().FirstObjCSelectorName->LongestObjCSelectorName = |
| 464 | Contexts.back().LongestObjCSelectorName; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 465 | return LT_ObjCMethodDecl; |
| 466 | } |
| 467 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 468 | return LT_Other; |
| 469 | } |
| 470 | |
| 471 | void next() { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 472 | if (CurrentToken != NULL) { |
| 473 | determineTokenType(*CurrentToken); |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 474 | CurrentToken->BindingStrength = Contexts.back().BindingStrength; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 475 | } |
| 476 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 477 | if (CurrentToken != NULL && !CurrentToken->Children.empty()) |
| 478 | CurrentToken = &CurrentToken->Children[0]; |
| 479 | else |
| 480 | CurrentToken = NULL; |
| 481 | } |
| 482 | |
| 483 | private: |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 484 | /// \brief A struct to hold information valid in a specific context, e.g. |
| 485 | /// a pair of parenthesis. |
| 486 | struct Context { |
| 487 | Context(unsigned BindingStrength, bool IsExpression) |
| 488 | : BindingStrength(BindingStrength), LongestObjCSelectorName(0), |
| 489 | ColonIsForRangeExpr(false), ColonIsObjCMethodExpr(false), |
| 490 | FirstObjCSelectorName(NULL), IsExpression(IsExpression), |
| 491 | LookForFunctionName(false) { |
| 492 | } |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 493 | |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 494 | unsigned BindingStrength; |
| 495 | unsigned LongestObjCSelectorName; |
| 496 | bool ColonIsForRangeExpr; |
| 497 | bool ColonIsObjCMethodExpr; |
| 498 | AnnotatedToken *FirstObjCSelectorName; |
| 499 | bool IsExpression; |
| 500 | bool LookForFunctionName; |
| 501 | }; |
| 502 | |
| 503 | /// \brief Puts a new \c Context onto the stack \c Contexts for the lifetime |
| 504 | /// of each instance. |
| 505 | struct ScopedContextCreator { |
| 506 | AnnotatingParser &P; |
| 507 | |
| 508 | ScopedContextCreator(AnnotatingParser &P, unsigned Increase) |
| 509 | : P(P) { |
| 510 | P.Contexts.push_back(Context( |
| 511 | P.Contexts.back().BindingStrength + Increase, |
| 512 | P.Contexts.back().IsExpression)); |
| 513 | } |
| 514 | |
| 515 | ~ScopedContextCreator() { P.Contexts.pop_back(); } |
| 516 | }; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 517 | |
| 518 | void determineTokenType(AnnotatedToken &Current) { |
| 519 | if (getPrecedence(Current) == prec::Assignment) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 520 | Contexts.back().IsExpression = true; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 521 | AnnotatedToken *Previous = Current.Parent; |
| 522 | while (Previous != NULL) { |
| 523 | if (Previous->Type == TT_BinaryOperator && |
| 524 | (Previous->is(tok::star) || Previous->is(tok::amp))) { |
| 525 | Previous->Type = TT_PointerOrReference; |
| 526 | } |
| 527 | Previous = Previous->Parent; |
| 528 | } |
| 529 | } |
| 530 | if (Current.is(tok::kw_return) || Current.is(tok::kw_throw) || |
| 531 | (Current.is(tok::l_paren) && !Line.MustBeDeclaration && |
| 532 | (Current.Parent == NULL || Current.Parent->isNot(tok::kw_for)))) |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 533 | Contexts.back().IsExpression = true; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 534 | |
| 535 | if (Current.Type == TT_Unknown) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 536 | if (Contexts.back().LookForFunctionName && Current.is(tok::l_paren)) { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 537 | findFunctionName(&Current); |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 538 | Contexts.back().LookForFunctionName = false; |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 539 | } else if (Current.is(tok::star) || Current.is(tok::amp)) { |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 540 | Current.Type = |
| 541 | determineStarAmpUsage(Current, Contexts.back().IsExpression); |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 542 | } else if (Current.is(tok::minus) || Current.is(tok::plus) || |
| 543 | Current.is(tok::caret)) { |
| 544 | Current.Type = determinePlusMinusCaretUsage(Current); |
| 545 | } else if (Current.is(tok::minusminus) || Current.is(tok::plusplus)) { |
| 546 | Current.Type = determineIncrementUsage(Current); |
| 547 | } else if (Current.is(tok::exclaim)) { |
| 548 | Current.Type = TT_UnaryOperator; |
| 549 | } else if (isBinaryOperator(Current)) { |
| 550 | Current.Type = TT_BinaryOperator; |
| 551 | } else if (Current.is(tok::comment)) { |
| 552 | std::string Data(Lexer::getSpelling(Current.FormatTok.Tok, SourceMgr, |
| 553 | Lex.getLangOpts())); |
| 554 | if (StringRef(Data).startswith("//")) |
| 555 | Current.Type = TT_LineComment; |
| 556 | else |
| 557 | Current.Type = TT_BlockComment; |
| 558 | } else if (Current.is(tok::r_paren) && |
| 559 | (Current.Parent->Type == TT_PointerOrReference || |
| 560 | Current.Parent->Type == TT_TemplateCloser) && |
| 561 | (Current.Children.empty() || |
| 562 | (Current.Children[0].isNot(tok::equal) && |
| 563 | Current.Children[0].isNot(tok::semi) && |
| 564 | Current.Children[0].isNot(tok::l_brace)))) { |
| 565 | // FIXME: We need to get smarter and understand more cases of casts. |
| 566 | Current.Type = TT_CastRParen; |
| 567 | } else if (Current.is(tok::at) && Current.Children.size()) { |
| 568 | switch (Current.Children[0].FormatTok.Tok.getObjCKeywordID()) { |
| 569 | case tok::objc_interface: |
| 570 | case tok::objc_implementation: |
| 571 | case tok::objc_protocol: |
| 572 | Current.Type = TT_ObjCDecl; |
| 573 | break; |
| 574 | case tok::objc_property: |
| 575 | Current.Type = TT_ObjCProperty; |
| 576 | break; |
| 577 | default: |
| 578 | break; |
| 579 | } |
| 580 | } |
| 581 | } |
| 582 | } |
| 583 | |
| 584 | /// \brief Starting from \p Current, this searches backwards for an |
| 585 | /// identifier which could be the start of a function name and marks it. |
| 586 | void findFunctionName(AnnotatedToken *Current) { |
| 587 | AnnotatedToken *Parent = Current->Parent; |
| 588 | while (Parent != NULL && Parent->Parent != NULL) { |
| 589 | if (Parent->is(tok::identifier) && |
| 590 | (Parent->Parent->is(tok::identifier) || |
| 591 | Parent->Parent->Type == TT_PointerOrReference || |
| 592 | Parent->Parent->Type == TT_TemplateCloser)) { |
| 593 | Parent->Type = TT_StartOfName; |
| 594 | break; |
| 595 | } |
| 596 | Parent = Parent->Parent; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | /// \brief Return the type of the given token assuming it is * or &. |
| 601 | TokenType |
| 602 | determineStarAmpUsage(const AnnotatedToken &Tok, bool IsExpression) { |
| 603 | const AnnotatedToken *PrevToken = getPreviousToken(Tok); |
| 604 | if (PrevToken == NULL) |
| 605 | return TT_UnaryOperator; |
| 606 | |
| 607 | const AnnotatedToken *NextToken = getNextToken(Tok); |
| 608 | if (NextToken == NULL) |
| 609 | return TT_Unknown; |
| 610 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 611 | if (PrevToken->is(tok::l_paren) || PrevToken->is(tok::l_square) || |
| 612 | PrevToken->is(tok::l_brace) || PrevToken->is(tok::comma) || |
| 613 | PrevToken->is(tok::kw_return) || PrevToken->is(tok::colon) || |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 614 | PrevToken->is(tok::equal) || PrevToken->Type == TT_BinaryOperator || |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 615 | PrevToken->Type == TT_UnaryOperator || PrevToken->Type == TT_CastRParen) |
| 616 | return TT_UnaryOperator; |
| 617 | |
Nico Weber | e8a9798 | 2013-02-06 06:20:11 +0000 | [diff] [blame] | 618 | if (NextToken->is(tok::l_square)) |
| 619 | return TT_PointerOrReference; |
| 620 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 621 | if (PrevToken->FormatTok.Tok.isLiteral() || PrevToken->is(tok::r_paren) || |
| 622 | PrevToken->is(tok::r_square) || NextToken->FormatTok.Tok.isLiteral() || |
Nico Weber | ee0feec | 2013-02-05 16:21:00 +0000 | [diff] [blame] | 623 | isUnaryOperator(*NextToken) || NextToken->is(tok::l_paren) || |
| 624 | NextToken->is(tok::l_square)) |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 625 | return TT_BinaryOperator; |
| 626 | |
| 627 | if (NextToken->is(tok::comma) || NextToken->is(tok::r_paren) || |
| 628 | NextToken->is(tok::greater)) |
| 629 | return TT_PointerOrReference; |
| 630 | |
| 631 | // It is very unlikely that we are going to find a pointer or reference type |
| 632 | // definition on the RHS of an assignment. |
| 633 | if (IsExpression) |
| 634 | return TT_BinaryOperator; |
| 635 | |
| 636 | return TT_PointerOrReference; |
| 637 | } |
| 638 | |
| 639 | TokenType determinePlusMinusCaretUsage(const AnnotatedToken &Tok) { |
| 640 | const AnnotatedToken *PrevToken = getPreviousToken(Tok); |
| 641 | if (PrevToken == NULL) |
| 642 | return TT_UnaryOperator; |
| 643 | |
| 644 | // Use heuristics to recognize unary operators. |
| 645 | if (PrevToken->is(tok::equal) || PrevToken->is(tok::l_paren) || |
| 646 | PrevToken->is(tok::comma) || PrevToken->is(tok::l_square) || |
| 647 | PrevToken->is(tok::question) || PrevToken->is(tok::colon) || |
| 648 | PrevToken->is(tok::kw_return) || PrevToken->is(tok::kw_case) || |
| 649 | PrevToken->is(tok::at) || PrevToken->is(tok::l_brace)) |
| 650 | return TT_UnaryOperator; |
| 651 | |
Nico Weber | ee0feec | 2013-02-05 16:21:00 +0000 | [diff] [blame] | 652 | // There can't be two consecutive binary operators. |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 653 | if (PrevToken->Type == TT_BinaryOperator) |
| 654 | return TT_UnaryOperator; |
| 655 | |
| 656 | // Fall back to marking the token as binary operator. |
| 657 | return TT_BinaryOperator; |
| 658 | } |
| 659 | |
| 660 | /// \brief Determine whether ++/-- are pre- or post-increments/-decrements. |
| 661 | TokenType determineIncrementUsage(const AnnotatedToken &Tok) { |
| 662 | const AnnotatedToken *PrevToken = getPreviousToken(Tok); |
| 663 | if (PrevToken == NULL) |
| 664 | return TT_UnaryOperator; |
| 665 | if (PrevToken->is(tok::r_paren) || PrevToken->is(tok::r_square) || |
| 666 | PrevToken->is(tok::identifier)) |
| 667 | return TT_TrailingUnaryOperator; |
| 668 | |
| 669 | return TT_UnaryOperator; |
| 670 | } |
Daniel Jasper | 4e77809 | 2013-02-06 10:05:46 +0000 | [diff] [blame^] | 671 | |
| 672 | SmallVector<Context, 8> Contexts; |
| 673 | |
| 674 | SourceManager &SourceMgr; |
| 675 | Lexer &Lex; |
| 676 | AnnotatedLine &Line; |
| 677 | AnnotatedToken *CurrentToken; |
| 678 | bool KeywordVirtualFound; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 679 | }; |
| 680 | |
| 681 | void TokenAnnotator::annotate() { |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 682 | AnnotatingParser Parser(SourceMgr, Lex, Line); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 683 | Line.Type = Parser.parseLine(); |
| 684 | if (Line.Type == LT_Invalid) |
| 685 | return; |
| 686 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 687 | if (Line.First.Type == TT_ObjCMethodSpecifier) |
| 688 | Line.Type = LT_ObjCMethodDecl; |
| 689 | else if (Line.First.Type == TT_ObjCDecl) |
| 690 | Line.Type = LT_ObjCDecl; |
| 691 | else if (Line.First.Type == TT_ObjCProperty) |
| 692 | Line.Type = LT_ObjCProperty; |
| 693 | |
| 694 | Line.First.SpaceRequiredBefore = true; |
| 695 | Line.First.MustBreakBefore = Line.First.FormatTok.MustBreakBefore; |
| 696 | Line.First.CanBreakBefore = Line.First.MustBreakBefore; |
| 697 | |
| 698 | Line.First.TotalLength = Line.First.FormatTok.TokenLength; |
| 699 | if (!Line.First.Children.empty()) |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 700 | calculateFormattingInformation(Line.First.Children[0]); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 701 | } |
| 702 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 703 | void TokenAnnotator::calculateFormattingInformation(AnnotatedToken &Current) { |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 704 | Current.SpaceRequiredBefore = spaceRequiredBefore(Current); |
| 705 | |
| 706 | if (Current.FormatTok.MustBreakBefore) { |
| 707 | Current.MustBreakBefore = true; |
Daniel Jasper | 2752ff3 | 2013-02-04 07:32:14 +0000 | [diff] [blame] | 708 | } else if (Current.Type == TT_LineComment) { |
| 709 | Current.MustBreakBefore = Current.FormatTok.NewlinesBefore > 0; |
| 710 | } else if ((Current.Parent->is(tok::comment) && |
| 711 | Current.FormatTok.NewlinesBefore > 0) || |
| 712 | (Current.is(tok::string_literal) && |
| 713 | Current.Parent->is(tok::string_literal))) { |
| 714 | Current.MustBreakBefore = true; |
Daniel Jasper | fa543ac | 2013-02-04 07:34:48 +0000 | [diff] [blame] | 715 | } else if (Current.is(tok::lessless) && !Current.Children.empty() && |
| 716 | Current.Parent->is(tok::string_literal) && |
| 717 | Current.Children[0].is(tok::string_literal)) { |
| 718 | Current.MustBreakBefore = true; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 719 | } else { |
Daniel Jasper | 2752ff3 | 2013-02-04 07:32:14 +0000 | [diff] [blame] | 720 | Current.MustBreakBefore = false; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 721 | } |
| 722 | Current.CanBreakBefore = Current.MustBreakBefore || canBreakBefore(Current); |
| 723 | if (Current.MustBreakBefore) |
| 724 | Current.TotalLength = Current.Parent->TotalLength + Style.ColumnLimit; |
| 725 | else |
| 726 | Current.TotalLength = |
| 727 | Current.Parent->TotalLength + Current.FormatTok.TokenLength + |
| 728 | (Current.SpaceRequiredBefore ? 1 : 0); |
| 729 | // FIXME: Only calculate this if CanBreakBefore is true once static |
| 730 | // initializers etc. are sorted out. |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 731 | // FIXME: Move magic numbers to a better place. |
| 732 | Current.SplitPenalty = 20 * Current.BindingStrength + splitPenalty(Current); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 733 | if (!Current.Children.empty()) |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 734 | calculateFormattingInformation(Current.Children[0]); |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 735 | } |
| 736 | |
| 737 | unsigned TokenAnnotator::splitPenalty(const AnnotatedToken &Tok) { |
| 738 | const AnnotatedToken &Left = *Tok.Parent; |
| 739 | const AnnotatedToken &Right = Tok; |
| 740 | |
| 741 | if (Left.is(tok::l_brace) && Right.isNot(tok::l_brace)) |
| 742 | return 50; |
| 743 | if (Left.is(tok::equal) && Right.is(tok::l_brace)) |
| 744 | return 150; |
| 745 | if (Left.is(tok::coloncolon)) |
| 746 | return 500; |
| 747 | |
| 748 | if (Left.Type == TT_RangeBasedForLoopColon) |
| 749 | return 5; |
| 750 | |
| 751 | if (Right.is(tok::arrow) || Right.is(tok::period)) { |
| 752 | if (Left.is(tok::r_paren) && Line.Type == LT_BuilderTypeCall) |
| 753 | return 5; // Should be smaller than breaking at a nested comma. |
| 754 | return 150; |
| 755 | } |
| 756 | |
| 757 | // In for-loops, prefer breaking at ',' and ';'. |
| 758 | if (Line.First.is(tok::kw_for) && |
| 759 | (Left.isNot(tok::comma) && Left.isNot(tok::semi))) |
| 760 | return 20; |
| 761 | |
Daniel Jasper | 8159d2f | 2013-02-04 07:30:30 +0000 | [diff] [blame] | 762 | if (Left.is(tok::semi)) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 763 | return 0; |
Daniel Jasper | 8159d2f | 2013-02-04 07:30:30 +0000 | [diff] [blame] | 764 | if (Left.is(tok::comma)) |
| 765 | return 1; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 766 | |
| 767 | // In Objective-C method expressions, prefer breaking before "param:" over |
| 768 | // breaking after it. |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 769 | if (Right.Type == TT_ObjCSelectorName) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 770 | return 0; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 771 | if (Left.is(tok::colon) && Left.Type == TT_ObjCMethodExpr) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 772 | return 20; |
| 773 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 774 | if (Left.is(tok::l_paren) || Left.is(tok::l_square) || |
| 775 | Left.Type == TT_TemplateOpener) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 776 | return 20; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 777 | |
Daniel Jasper | 0178673 | 2013-02-04 07:21:18 +0000 | [diff] [blame] | 778 | if (Right.is(tok::lessless)) |
| 779 | return prec::Shift; |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 780 | if (Left.Type == TT_ConditionalExpr) |
| 781 | return prec::Assignment; |
| 782 | prec::Level Level = getPrecedence(Left); |
| 783 | |
| 784 | if (Level != prec::Unknown) |
| 785 | return Level; |
| 786 | |
| 787 | return 3; |
| 788 | } |
| 789 | |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 790 | bool TokenAnnotator::spaceRequiredBetween(const AnnotatedToken &Left, |
| 791 | const AnnotatedToken &Right) { |
| 792 | if (Right.is(tok::hashhash)) |
| 793 | return Left.is(tok::hash); |
| 794 | if (Left.is(tok::hashhash) || Left.is(tok::hash)) |
| 795 | return Right.is(tok::hash); |
| 796 | if (Right.is(tok::r_paren) || Right.is(tok::semi) || Right.is(tok::comma)) |
| 797 | return false; |
| 798 | if (Right.is(tok::less) && |
| 799 | (Left.is(tok::kw_template) || |
| 800 | (Line.Type == LT_ObjCDecl && Style.ObjCSpaceBeforeProtocolList))) |
| 801 | return true; |
| 802 | if (Left.is(tok::arrow) || Right.is(tok::arrow)) |
| 803 | return false; |
| 804 | if (Left.is(tok::exclaim) || Left.is(tok::tilde)) |
| 805 | return false; |
| 806 | if (Left.is(tok::at) && |
| 807 | (Right.is(tok::identifier) || Right.is(tok::string_literal) || |
| 808 | Right.is(tok::char_constant) || Right.is(tok::numeric_constant) || |
| 809 | Right.is(tok::l_paren) || Right.is(tok::l_brace) || |
| 810 | Right.is(tok::kw_true) || Right.is(tok::kw_false))) |
| 811 | return false; |
| 812 | if (Left.is(tok::coloncolon)) |
| 813 | return false; |
| 814 | if (Right.is(tok::coloncolon)) |
| 815 | return Left.isNot(tok::identifier) && Left.isNot(tok::greater); |
| 816 | if (Left.is(tok::less) || Right.is(tok::greater) || Right.is(tok::less)) |
| 817 | return false; |
| 818 | if (Right.is(tok::amp) || Right.is(tok::star)) |
| 819 | return Left.FormatTok.Tok.isLiteral() || |
| 820 | (Left.isNot(tok::star) && Left.isNot(tok::amp) && |
| 821 | !Style.PointerAndReferenceBindToType); |
| 822 | if (Left.is(tok::amp) || Left.is(tok::star)) |
| 823 | return Right.FormatTok.Tok.isLiteral() || |
| 824 | Style.PointerAndReferenceBindToType; |
| 825 | if (Right.is(tok::star) && Left.is(tok::l_paren)) |
| 826 | return false; |
| 827 | if (Left.is(tok::l_square) || Right.is(tok::r_square)) |
| 828 | return false; |
| 829 | if (Right.is(tok::l_square) && Right.Type != TT_ObjCMethodExpr) |
| 830 | return false; |
| 831 | if (Left.is(tok::period) || Right.is(tok::period)) |
| 832 | return false; |
| 833 | if (Left.is(tok::colon)) |
| 834 | return Left.Type != TT_ObjCMethodExpr; |
| 835 | if (Right.is(tok::colon)) |
| 836 | return Right.Type != TT_ObjCMethodExpr; |
| 837 | if (Left.is(tok::l_paren)) |
| 838 | return false; |
| 839 | if (Right.is(tok::l_paren)) { |
| 840 | return Line.Type == LT_ObjCDecl || Left.is(tok::kw_if) || |
| 841 | Left.is(tok::kw_for) || Left.is(tok::kw_while) || |
| 842 | Left.is(tok::kw_switch) || Left.is(tok::kw_return) || |
| 843 | Left.is(tok::kw_catch) || Left.is(tok::kw_new) || |
| 844 | Left.is(tok::kw_delete); |
| 845 | } |
| 846 | if (Left.is(tok::at) && |
| 847 | Right.FormatTok.Tok.getObjCKeywordID() != tok::objc_not_keyword) |
| 848 | return false; |
| 849 | if (Left.is(tok::l_brace) && Right.is(tok::r_brace)) |
| 850 | return false; |
| 851 | return true; |
| 852 | } |
| 853 | |
| 854 | bool TokenAnnotator::spaceRequiredBefore(const AnnotatedToken &Tok) { |
| 855 | if (Line.Type == LT_ObjCMethodDecl) { |
| 856 | if (Tok.is(tok::identifier) && !Tok.Children.empty() && |
| 857 | Tok.Children[0].is(tok::colon) && Tok.Parent->is(tok::identifier)) |
| 858 | return true; |
| 859 | if (Tok.is(tok::colon)) |
| 860 | return false; |
| 861 | if (Tok.Parent->Type == TT_ObjCMethodSpecifier) |
| 862 | return true; |
| 863 | if (Tok.Parent->is(tok::r_paren) && Tok.is(tok::identifier)) |
| 864 | // Don't space between ')' and <id> |
| 865 | return false; |
| 866 | if (Tok.Parent->is(tok::colon) && Tok.is(tok::l_paren)) |
| 867 | // Don't space between ':' and '(' |
| 868 | return false; |
| 869 | } |
| 870 | if (Line.Type == LT_ObjCProperty && |
| 871 | (Tok.is(tok::equal) || Tok.Parent->is(tok::equal))) |
| 872 | return false; |
| 873 | |
| 874 | if (Tok.Parent->is(tok::comma)) |
| 875 | return true; |
| 876 | if (Tok.Type == TT_CtorInitializerColon || Tok.Type == TT_ObjCBlockLParen) |
| 877 | return true; |
| 878 | if (Tok.Type == TT_OverloadedOperator) |
| 879 | return Tok.is(tok::identifier) || Tok.is(tok::kw_new) || |
| 880 | Tok.is(tok::kw_delete) || Tok.is(tok::kw_bool); |
| 881 | if (Tok.Parent->Type == TT_OverloadedOperator) |
| 882 | return false; |
| 883 | if (Tok.is(tok::colon)) |
| 884 | return Line.First.isNot(tok::kw_case) && !Tok.Children.empty() && |
| 885 | Tok.Type != TT_ObjCMethodExpr; |
| 886 | if (Tok.Parent->Type == TT_UnaryOperator || Tok.Parent->Type == TT_CastRParen) |
| 887 | return false; |
| 888 | if (Tok.Type == TT_UnaryOperator) |
| 889 | return Tok.Parent->isNot(tok::l_paren) && |
| 890 | Tok.Parent->isNot(tok::l_square) && Tok.Parent->isNot(tok::at) && |
| 891 | (Tok.Parent->isNot(tok::colon) || |
| 892 | Tok.Parent->Type != TT_ObjCMethodExpr); |
| 893 | if (Tok.Parent->is(tok::greater) && Tok.is(tok::greater)) { |
| 894 | return Tok.Type == TT_TemplateCloser && Tok.Parent->Type == |
| 895 | TT_TemplateCloser && Style.SplitTemplateClosingGreater; |
| 896 | } |
| 897 | if (Tok.Type == TT_BinaryOperator || Tok.Parent->Type == TT_BinaryOperator) |
| 898 | return true; |
| 899 | if (Tok.Parent->Type == TT_TemplateCloser && Tok.is(tok::l_paren)) |
| 900 | return false; |
| 901 | if (Tok.is(tok::less) && Line.First.is(tok::hash)) |
| 902 | return true; |
| 903 | if (Tok.Type == TT_TrailingUnaryOperator) |
| 904 | return false; |
| 905 | return spaceRequiredBetween(*Tok.Parent, Tok); |
| 906 | } |
| 907 | |
| 908 | bool TokenAnnotator::canBreakBefore(const AnnotatedToken &Right) { |
| 909 | const AnnotatedToken &Left = *Right.Parent; |
| 910 | if (Line.Type == LT_ObjCMethodDecl) { |
| 911 | if (Right.is(tok::identifier) && !Right.Children.empty() && |
| 912 | Right.Children[0].is(tok::colon) && Left.is(tok::identifier)) |
| 913 | return true; |
| 914 | if (Right.is(tok::identifier) && Left.is(tok::l_paren) && |
| 915 | Left.Parent->is(tok::colon)) |
| 916 | // Don't break this identifier as ':' or identifier |
| 917 | // before it will break. |
| 918 | return false; |
| 919 | if (Right.is(tok::colon) && Left.is(tok::identifier) && Left.CanBreakBefore) |
| 920 | // Don't break at ':' if identifier before it can beak. |
| 921 | return false; |
| 922 | } |
| 923 | if (Right.Type == TT_StartOfName && Style.AllowReturnTypeOnItsOwnLine) |
| 924 | return true; |
| 925 | if (Right.is(tok::colon) && Right.Type == TT_ObjCMethodExpr) |
| 926 | return false; |
| 927 | if (Left.is(tok::colon) && Left.Type == TT_ObjCMethodExpr) |
| 928 | return true; |
Daniel Jasper | 63d7ced | 2013-02-05 10:07:47 +0000 | [diff] [blame] | 929 | if (Right.Type == TT_ObjCSelectorName) |
Daniel Jasper | 32d28ee | 2013-01-29 21:01:14 +0000 | [diff] [blame] | 930 | return true; |
| 931 | if (Left.ClosesTemplateDeclaration) |
| 932 | return true; |
| 933 | if (Right.Type == TT_ConditionalExpr || Right.is(tok::question)) |
| 934 | return true; |
| 935 | if (Left.Type == TT_RangeBasedForLoopColon) |
| 936 | return true; |
| 937 | if (Left.Type == TT_PointerOrReference || Left.Type == TT_TemplateCloser || |
| 938 | Left.Type == TT_UnaryOperator || Left.Type == TT_ConditionalExpr || |
| 939 | Left.is(tok::question)) |
| 940 | return false; |
| 941 | if (Left.is(tok::equal) && Line.Type == LT_VirtualFunctionDecl) |
| 942 | return false; |
| 943 | |
| 944 | if (Right.Type == TT_LineComment) |
| 945 | // We rely on MustBreakBefore being set correctly here as we should not |
| 946 | // change the "binding" behavior of a comment. |
| 947 | return false; |
| 948 | |
| 949 | // Allow breaking after a trailing 'const', e.g. after a method declaration, |
| 950 | // unless it is follow by ';', '{' or '='. |
| 951 | if (Left.is(tok::kw_const) && Left.Parent != NULL && |
| 952 | Left.Parent->is(tok::r_paren)) |
| 953 | return Right.isNot(tok::l_brace) && Right.isNot(tok::semi) && |
| 954 | Right.isNot(tok::equal); |
| 955 | |
| 956 | // We only break before r_brace if there was a corresponding break before |
| 957 | // the l_brace, which is tracked by BreakBeforeClosingBrace. |
| 958 | if (Right.is(tok::r_brace)) |
| 959 | return false; |
| 960 | |
| 961 | if (Right.is(tok::r_paren) || Right.is(tok::greater)) |
| 962 | return false; |
| 963 | return (isBinaryOperator(Left) && Left.isNot(tok::lessless)) || |
| 964 | Left.is(tok::comma) || Right.is(tok::lessless) || |
| 965 | Right.is(tok::arrow) || Right.is(tok::period) || |
| 966 | Right.is(tok::colon) || Left.is(tok::coloncolon) || |
| 967 | Left.is(tok::semi) || Left.is(tok::l_brace) || |
| 968 | (Left.is(tok::r_paren) && Left.Type != TT_CastRParen && |
| 969 | Right.is(tok::identifier)) || |
| 970 | (Left.is(tok::l_paren) && !Right.is(tok::r_paren)) || |
| 971 | (Left.is(tok::l_square) && !Right.is(tok::r_square)); |
| 972 | } |
| 973 | |
| 974 | } // namespace format |
| 975 | } // namespace clang |