1 //===-- lib/Parser/executable-parsers.cpp ---------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 // Per-type parsers for executable statements 10 11 #include "basic-parsers.h" 12 #include "debug-parser.h" 13 #include "expr-parsers.h" 14 #include "misc-parsers.h" 15 #include "stmt-parser.h" 16 #include "token-parsers.h" 17 #include "type-parser-implementation.h" 18 #include "flang/Parser/characters.h" 19 #include "flang/Parser/parse-tree.h" 20 21 namespace Fortran::parser { 22 23 // Fortran allows the statement with the corresponding label at the end of 24 // a do-construct that begins with an old-style label-do-stmt to be a 25 // new-style END DO statement; e.g., DO 10 I=1,N; ...; 10 END DO. Usually, 26 // END DO statements appear only at the ends of do-constructs that begin 27 // with a nonlabel-do-stmt, so care must be taken to recognize this case and 28 // essentially treat them like CONTINUE statements. 29 30 // R514 executable-construct -> 31 // action-stmt | associate-construct | block-construct | 32 // case-construct | change-team-construct | critical-construct | 33 // do-construct | if-construct | select-rank-construct | 34 // select-type-construct | where-construct | forall-construct | 35 // (CUDA) CUF-kernel-do-construct 36 constexpr auto executableConstruct{first( 37 construct<ExecutableConstruct>(CapturedLabelDoStmt{}), 38 construct<ExecutableConstruct>(EndDoStmtForCapturedLabelDoStmt{}), 39 construct<ExecutableConstruct>(indirect(Parser<DoConstruct>{})), 40 // Attempt DO statements before assignment statements for better 41 // error messages in cases like "DO10I=1,(error)". 42 construct<ExecutableConstruct>(statement(actionStmt)), 43 construct<ExecutableConstruct>(indirect(Parser<AssociateConstruct>{})), 44 construct<ExecutableConstruct>(indirect(Parser<BlockConstruct>{})), 45 construct<ExecutableConstruct>(indirect(Parser<CaseConstruct>{})), 46 construct<ExecutableConstruct>(indirect(Parser<ChangeTeamConstruct>{})), 47 construct<ExecutableConstruct>(indirect(Parser<CriticalConstruct>{})), 48 construct<ExecutableConstruct>(indirect(Parser<IfConstruct>{})), 49 construct<ExecutableConstruct>(indirect(Parser<SelectRankConstruct>{})), 50 construct<ExecutableConstruct>(indirect(Parser<SelectTypeConstruct>{})), 51 construct<ExecutableConstruct>(indirect(whereConstruct)), 52 construct<ExecutableConstruct>(indirect(forallConstruct)), 53 construct<ExecutableConstruct>(indirect(ompEndLoopDirective)), 54 construct<ExecutableConstruct>(indirect(openmpConstruct)), 55 construct<ExecutableConstruct>(indirect(Parser<OpenACCConstruct>{})), 56 construct<ExecutableConstruct>(indirect(compilerDirective)), 57 construct<ExecutableConstruct>(indirect(Parser<CUFKernelDoConstruct>{})))}; 58 59 // R510 execution-part-construct -> 60 // executable-construct | format-stmt | entry-stmt | data-stmt 61 // Extension (PGI/Intel): also accept NAMELIST in execution part 62 constexpr auto obsoleteExecutionPartConstruct{recovery(ignoredStatementPrefix >> 63 fail<ExecutionPartConstruct>( 64 "obsolete legacy extension is not supported"_err_en_US), 65 construct<ExecutionPartConstruct>(construct<ErrorRecovery>(ok / 66 statement("REDIMENSION" >> name / 67 parenthesized(nonemptyList(Parser<AllocateShapeSpec>{}))))))}; 68 69 TYPE_PARSER(recovery( 70 withMessage("expected execution part construct"_err_en_US, 71 CONTEXT_PARSER("execution part construct"_en_US, 72 first(construct<ExecutionPartConstruct>(executableConstruct), 73 construct<ExecutionPartConstruct>( 74 statement(indirect(formatStmt))), 75 construct<ExecutionPartConstruct>( 76 statement(indirect(entryStmt))), 77 construct<ExecutionPartConstruct>( 78 statement(indirect(dataStmt))), 79 extension<LanguageFeature::ExecutionPartNamelist>( 80 "nonstandard usage: NAMELIST in execution part"_port_en_US, 81 construct<ExecutionPartConstruct>( 82 statement(indirect(Parser<NamelistStmt>{})))), 83 obsoleteExecutionPartConstruct))), 84 construct<ExecutionPartConstruct>(executionPartErrorRecovery))) 85 86 // R509 execution-part -> executable-construct [execution-part-construct]... 87 TYPE_CONTEXT_PARSER("execution part"_en_US, 88 construct<ExecutionPart>(many(executionPartConstruct))) 89 90 // R515 action-stmt -> 91 // allocate-stmt | assignment-stmt | backspace-stmt | call-stmt | 92 // close-stmt | continue-stmt | cycle-stmt | deallocate-stmt | 93 // endfile-stmt | error-stop-stmt | event-post-stmt | event-wait-stmt | 94 // exit-stmt | fail-image-stmt | flush-stmt | form-team-stmt | 95 // goto-stmt | if-stmt | inquire-stmt | lock-stmt | nullify-stmt | 96 // open-stmt | pointer-assignment-stmt | print-stmt | read-stmt | 97 // return-stmt | rewind-stmt | stop-stmt | sync-all-stmt | 98 // sync-images-stmt | sync-memory-stmt | sync-team-stmt | unlock-stmt | 99 // wait-stmt | where-stmt | write-stmt | computed-goto-stmt | forall-stmt 100 // R1159 continue-stmt -> CONTINUE 101 // R1163 fail-image-stmt -> FAIL IMAGE 102 TYPE_PARSER(first(construct<ActionStmt>(indirect(Parser<AllocateStmt>{})), 103 construct<ActionStmt>(indirect(assignmentStmt)), 104 construct<ActionStmt>(indirect(pointerAssignmentStmt)), 105 construct<ActionStmt>(indirect(Parser<BackspaceStmt>{})), 106 construct<ActionStmt>(indirect(Parser<CallStmt>{})), 107 construct<ActionStmt>(indirect(Parser<CloseStmt>{})), 108 construct<ActionStmt>(construct<ContinueStmt>("CONTINUE"_tok)), 109 construct<ActionStmt>(indirect(Parser<CycleStmt>{})), 110 construct<ActionStmt>(indirect(Parser<DeallocateStmt>{})), 111 construct<ActionStmt>(indirect(Parser<EndfileStmt>{})), 112 construct<ActionStmt>(indirect(Parser<EventPostStmt>{})), 113 construct<ActionStmt>(indirect(Parser<EventWaitStmt>{})), 114 construct<ActionStmt>(indirect(Parser<ExitStmt>{})), 115 construct<ActionStmt>(construct<FailImageStmt>("FAIL IMAGE"_sptok)), 116 construct<ActionStmt>(indirect(Parser<FlushStmt>{})), 117 construct<ActionStmt>(indirect(Parser<FormTeamStmt>{})), 118 construct<ActionStmt>(indirect(Parser<GotoStmt>{})), 119 construct<ActionStmt>(indirect(Parser<IfStmt>{})), 120 construct<ActionStmt>(indirect(Parser<InquireStmt>{})), 121 construct<ActionStmt>(indirect(Parser<LockStmt>{})), 122 construct<ActionStmt>(indirect(Parser<NullifyStmt>{})), 123 construct<ActionStmt>(indirect(Parser<OpenStmt>{})), 124 construct<ActionStmt>(indirect(Parser<PrintStmt>{})), 125 construct<ActionStmt>(indirect(Parser<ReadStmt>{})), 126 construct<ActionStmt>(indirect(Parser<ReturnStmt>{})), 127 construct<ActionStmt>(indirect(Parser<RewindStmt>{})), 128 construct<ActionStmt>(indirect(Parser<StopStmt>{})), // & error-stop-stmt 129 construct<ActionStmt>(indirect(Parser<SyncAllStmt>{})), 130 construct<ActionStmt>(indirect(Parser<SyncImagesStmt>{})), 131 construct<ActionStmt>(indirect(Parser<SyncMemoryStmt>{})), 132 construct<ActionStmt>(indirect(Parser<SyncTeamStmt>{})), 133 construct<ActionStmt>(indirect(Parser<UnlockStmt>{})), 134 construct<ActionStmt>(indirect(Parser<WaitStmt>{})), 135 construct<ActionStmt>(indirect(whereStmt)), 136 construct<ActionStmt>(indirect(Parser<WriteStmt>{})), 137 construct<ActionStmt>(indirect(Parser<ComputedGotoStmt>{})), 138 construct<ActionStmt>(indirect(forallStmt)), 139 construct<ActionStmt>(indirect(Parser<ArithmeticIfStmt>{})), 140 construct<ActionStmt>(indirect(Parser<AssignStmt>{})), 141 construct<ActionStmt>(indirect(Parser<AssignedGotoStmt>{})), 142 construct<ActionStmt>(indirect(Parser<PauseStmt>{})))) 143 144 // R1102 associate-construct -> associate-stmt block end-associate-stmt 145 TYPE_CONTEXT_PARSER("ASSOCIATE construct"_en_US, 146 construct<AssociateConstruct>(statement(Parser<AssociateStmt>{}), block, 147 statement(Parser<EndAssociateStmt>{}))) 148 149 // R1103 associate-stmt -> 150 // [associate-construct-name :] ASSOCIATE ( association-list ) 151 TYPE_CONTEXT_PARSER("ASSOCIATE statement"_en_US, 152 construct<AssociateStmt>(maybe(name / ":"), 153 "ASSOCIATE" >> parenthesized(nonemptyList(Parser<Association>{})))) 154 155 // R1104 association -> associate-name => selector 156 TYPE_PARSER(construct<Association>(name, "=>" >> selector)) 157 158 // R1105 selector -> expr | variable 159 TYPE_PARSER(construct<Selector>(variable) / lookAhead(","_tok || ")"_tok) || 160 construct<Selector>(expr)) 161 162 // R1106 end-associate-stmt -> END ASSOCIATE [associate-construct-name] 163 TYPE_PARSER(construct<EndAssociateStmt>(recovery( 164 "END ASSOCIATE" >> maybe(name), namedConstructEndStmtErrorRecovery))) 165 166 // R1107 block-construct -> 167 // block-stmt [block-specification-part] block end-block-stmt 168 TYPE_CONTEXT_PARSER("BLOCK construct"_en_US, 169 construct<BlockConstruct>(statement(Parser<BlockStmt>{}), 170 Parser<BlockSpecificationPart>{}, // can be empty 171 block, statement(Parser<EndBlockStmt>{}))) 172 173 // R1108 block-stmt -> [block-construct-name :] BLOCK 174 TYPE_PARSER(construct<BlockStmt>(maybe(name / ":") / "BLOCK")) 175 176 // R1109 block-specification-part -> 177 // [use-stmt]... [import-stmt]... [implicit-part] 178 // [[declaration-construct]... specification-construct] 179 // C1107 prohibits COMMON, EQUIVALENCE, INTENT, NAMELIST, OPTIONAL, VALUE, 180 // and statement function definitions. C1108 prohibits SAVE /common/. 181 // C1570 indirectly prohibits ENTRY. These constraints are best enforced later. 182 // The odd grammar rule above would have the effect of forcing any 183 // trailing FORMAT and DATA statements after the last specification-construct 184 // to be recognized as part of the block-construct's block part rather than 185 // its block-specification-part, a distinction without any apparent difference. 186 TYPE_PARSER(construct<BlockSpecificationPart>(specificationPart)) 187 188 // R1110 end-block-stmt -> END BLOCK [block-construct-name] 189 TYPE_PARSER(construct<EndBlockStmt>( 190 recovery("END BLOCK" >> maybe(name), namedConstructEndStmtErrorRecovery))) 191 192 // R1111 change-team-construct -> change-team-stmt block end-change-team-stmt 193 TYPE_CONTEXT_PARSER("CHANGE TEAM construct"_en_US, 194 construct<ChangeTeamConstruct>(statement(Parser<ChangeTeamStmt>{}), block, 195 statement(Parser<EndChangeTeamStmt>{}))) 196 197 // R1112 change-team-stmt -> 198 // [team-construct-name :] CHANGE TEAM 199 // ( team-value [, coarray-association-list] [, sync-stat-list] ) 200 TYPE_CONTEXT_PARSER("CHANGE TEAM statement"_en_US, 201 construct<ChangeTeamStmt>(maybe(name / ":"), 202 "CHANGE TEAM"_sptok >> "("_tok >> teamValue, 203 defaulted("," >> nonemptyList(Parser<CoarrayAssociation>{})), 204 defaulted("," >> nonemptyList(statOrErrmsg))) / 205 ")") 206 207 // R1113 coarray-association -> codimension-decl => selector 208 TYPE_PARSER( 209 construct<CoarrayAssociation>(Parser<CodimensionDecl>{}, "=>" >> selector)) 210 211 // R1114 end-change-team-stmt -> 212 // END TEAM [( [sync-stat-list] )] [team-construct-name] 213 TYPE_CONTEXT_PARSER("END TEAM statement"_en_US, 214 construct<EndChangeTeamStmt>( 215 "END TEAM" >> defaulted(parenthesized(optionalList(statOrErrmsg))), 216 maybe(name))) 217 218 // R1117 critical-stmt -> 219 // [critical-construct-name :] CRITICAL [( [sync-stat-list] )] 220 TYPE_CONTEXT_PARSER("CRITICAL statement"_en_US, 221 construct<CriticalStmt>(maybe(name / ":"), 222 "CRITICAL" >> defaulted(parenthesized(optionalList(statOrErrmsg))))) 223 224 // R1116 critical-construct -> critical-stmt block end-critical-stmt 225 TYPE_CONTEXT_PARSER("CRITICAL construct"_en_US, 226 construct<CriticalConstruct>(statement(Parser<CriticalStmt>{}), block, 227 statement(Parser<EndCriticalStmt>{}))) 228 229 // R1118 end-critical-stmt -> END CRITICAL [critical-construct-name] 230 TYPE_PARSER(construct<EndCriticalStmt>(recovery( 231 "END CRITICAL" >> maybe(name), namedConstructEndStmtErrorRecovery))) 232 233 // R1119 do-construct -> do-stmt block end-do 234 // R1120 do-stmt -> nonlabel-do-stmt | label-do-stmt 235 TYPE_CONTEXT_PARSER("DO construct"_en_US, 236 construct<DoConstruct>( 237 statement(Parser<NonLabelDoStmt>{}) / EnterNonlabelDoConstruct{}, block, 238 statement(Parser<EndDoStmt>{}) / LeaveDoConstruct{})) 239 240 // R1125 concurrent-header -> 241 // ( [integer-type-spec ::] concurrent-control-list 242 // [, scalar-mask-expr] ) 243 TYPE_PARSER(parenthesized(construct<ConcurrentHeader>( 244 maybe(integerTypeSpec / "::"), nonemptyList(Parser<ConcurrentControl>{}), 245 maybe("," >> scalarLogicalExpr)))) 246 247 // R1126 concurrent-control -> 248 // index-name = concurrent-limit : concurrent-limit [: concurrent-step] 249 // R1127 concurrent-limit -> scalar-int-expr 250 // R1128 concurrent-step -> scalar-int-expr 251 TYPE_PARSER(construct<ConcurrentControl>(name / "=", scalarIntExpr / ":", 252 scalarIntExpr, maybe(":" >> scalarIntExpr))) 253 254 // R1130 locality-spec -> 255 // LOCAL ( variable-name-list ) | LOCAL_INIT ( variable-name-list ) | 256 // SHARED ( variable-name-list ) | DEFAULT ( NONE ) 257 TYPE_PARSER(construct<LocalitySpec>(construct<LocalitySpec::Local>( 258 "LOCAL" >> parenthesized(listOfNames))) || 259 construct<LocalitySpec>(construct<LocalitySpec::LocalInit>( 260 "LOCAL_INIT"_sptok >> parenthesized(listOfNames))) || 261 construct<LocalitySpec>(construct<LocalitySpec::Shared>( 262 "SHARED" >> parenthesized(listOfNames))) || 263 construct<LocalitySpec>( 264 construct<LocalitySpec::DefaultNone>("DEFAULT ( NONE )"_tok))) 265 266 // R1123 loop-control -> 267 // [,] do-variable = scalar-int-expr , scalar-int-expr 268 // [, scalar-int-expr] | 269 // [,] WHILE ( scalar-logical-expr ) | 270 // [,] CONCURRENT concurrent-header concurrent-locality 271 // R1129 concurrent-locality -> [locality-spec]... 272 TYPE_CONTEXT_PARSER("loop control"_en_US, 273 maybe(","_tok) >> 274 (construct<LoopControl>(loopBounds(scalarExpr)) || 275 construct<LoopControl>( 276 "WHILE" >> parenthesized(scalarLogicalExpr)) || 277 construct<LoopControl>(construct<LoopControl::Concurrent>( 278 "CONCURRENT" >> concurrentHeader, 279 many(Parser<LocalitySpec>{}))))) 280 281 // R1121 label-do-stmt -> [do-construct-name :] DO label [loop-control] 282 TYPE_CONTEXT_PARSER("label DO statement"_en_US, 283 construct<LabelDoStmt>( 284 maybe(name / ":"), "DO" >> label, maybe(loopControl))) 285 286 // R1122 nonlabel-do-stmt -> [do-construct-name :] DO [loop-control] 287 TYPE_CONTEXT_PARSER("nonlabel DO statement"_en_US, 288 construct<NonLabelDoStmt>(maybe(name / ":"), "DO" >> maybe(loopControl))) 289 290 // R1132 end-do-stmt -> END DO [do-construct-name] 291 TYPE_CONTEXT_PARSER("END DO statement"_en_US, 292 construct<EndDoStmt>( 293 recovery("END DO" >> maybe(name), namedConstructEndStmtErrorRecovery))) 294 295 // R1133 cycle-stmt -> CYCLE [do-construct-name] 296 TYPE_CONTEXT_PARSER( 297 "CYCLE statement"_en_US, construct<CycleStmt>("CYCLE" >> maybe(name))) 298 299 // R1134 if-construct -> 300 // if-then-stmt block [else-if-stmt block]... 301 // [else-stmt block] end-if-stmt 302 // R1135 if-then-stmt -> [if-construct-name :] IF ( scalar-logical-expr ) 303 // THEN R1136 else-if-stmt -> 304 // ELSE IF ( scalar-logical-expr ) THEN [if-construct-name] 305 // R1137 else-stmt -> ELSE [if-construct-name] 306 // R1138 end-if-stmt -> END IF [if-construct-name] 307 TYPE_CONTEXT_PARSER("IF construct"_en_US, 308 construct<IfConstruct>( 309 statement(construct<IfThenStmt>(maybe(name / ":"), 310 "IF" >> parenthesized(scalarLogicalExpr) / 311 recovery("THEN"_tok, lookAhead(endOfStmt)))), 312 block, 313 many(construct<IfConstruct::ElseIfBlock>( 314 unambiguousStatement(construct<ElseIfStmt>( 315 "ELSE IF" >> parenthesized(scalarLogicalExpr), 316 recovery("THEN"_tok, ok) >> maybe(name))), 317 block)), 318 maybe(construct<IfConstruct::ElseBlock>( 319 statement(construct<ElseStmt>("ELSE" >> maybe(name))), block)), 320 statement(construct<EndIfStmt>(recovery( 321 "END IF" >> maybe(name), namedConstructEndStmtErrorRecovery))))) 322 323 // R1139 if-stmt -> IF ( scalar-logical-expr ) action-stmt 324 TYPE_CONTEXT_PARSER("IF statement"_en_US, 325 construct<IfStmt>("IF" >> parenthesized(scalarLogicalExpr), 326 unlabeledStatement(actionStmt))) 327 328 // R1140 case-construct -> 329 // select-case-stmt [case-stmt block]... end-select-stmt 330 TYPE_CONTEXT_PARSER("SELECT CASE construct"_en_US, 331 construct<CaseConstruct>(statement(Parser<SelectCaseStmt>{}), 332 many(construct<CaseConstruct::Case>( 333 unambiguousStatement(Parser<CaseStmt>{}), block)), 334 statement(endSelectStmt))) 335 336 // R1141 select-case-stmt -> [case-construct-name :] SELECT CASE ( case-expr 337 // ) R1144 case-expr -> scalar-expr 338 TYPE_CONTEXT_PARSER("SELECT CASE statement"_en_US, 339 construct<SelectCaseStmt>( 340 maybe(name / ":"), "SELECT CASE" >> parenthesized(scalar(expr)))) 341 342 // R1142 case-stmt -> CASE case-selector [case-construct-name] 343 TYPE_CONTEXT_PARSER("CASE statement"_en_US, 344 construct<CaseStmt>("CASE" >> Parser<CaseSelector>{}, maybe(name))) 345 346 // R1143 end-select-stmt -> END SELECT [case-construct-name] 347 // R1151 end-select-rank-stmt -> END SELECT [select-construct-name] 348 // R1155 end-select-type-stmt -> END SELECT [select-construct-name] 349 TYPE_PARSER(construct<EndSelectStmt>( 350 recovery("END SELECT" >> maybe(name), namedConstructEndStmtErrorRecovery))) 351 352 // R1145 case-selector -> ( case-value-range-list ) | DEFAULT 353 constexpr auto defaultKeyword{construct<Default>("DEFAULT"_tok)}; 354 TYPE_PARSER(parenthesized(construct<CaseSelector>( 355 nonemptyList(Parser<CaseValueRange>{}))) || 356 construct<CaseSelector>(defaultKeyword)) 357 358 // R1147 case-value -> scalar-constant-expr 359 constexpr auto caseValue{scalar(constantExpr)}; 360 361 // R1146 case-value-range -> 362 // case-value | case-value : | : case-value | case-value : case-value 363 TYPE_PARSER(construct<CaseValueRange>(construct<CaseValueRange::Range>( 364 construct<std::optional<CaseValue>>(caseValue), 365 ":" >> maybe(caseValue))) || 366 construct<CaseValueRange>( 367 construct<CaseValueRange::Range>(construct<std::optional<CaseValue>>(), 368 ":" >> construct<std::optional<CaseValue>>(caseValue))) || 369 construct<CaseValueRange>(caseValue)) 370 371 // R1148 select-rank-construct -> 372 // select-rank-stmt [select-rank-case-stmt block]... 373 // end-select-rank-stmt 374 TYPE_CONTEXT_PARSER("SELECT RANK construct"_en_US, 375 construct<SelectRankConstruct>(statement(Parser<SelectRankStmt>{}), 376 many(construct<SelectRankConstruct::RankCase>( 377 unambiguousStatement(Parser<SelectRankCaseStmt>{}), block)), 378 statement(endSelectStmt))) 379 380 // R1149 select-rank-stmt -> 381 // [select-construct-name :] SELECT RANK 382 // ( [associate-name =>] selector ) 383 TYPE_CONTEXT_PARSER("SELECT RANK statement"_en_US, 384 construct<SelectRankStmt>(maybe(name / ":"), 385 "SELECT RANK"_sptok >> "("_tok >> maybe(name / "=>"), selector / ")")) 386 387 // R1150 select-rank-case-stmt -> 388 // RANK ( scalar-int-constant-expr ) [select-construct-name] | 389 // RANK ( * ) [select-construct-name] | 390 // RANK DEFAULT [select-construct-name] 391 TYPE_CONTEXT_PARSER("RANK case statement"_en_US, 392 "RANK" >> (construct<SelectRankCaseStmt>( 393 parenthesized(construct<SelectRankCaseStmt::Rank>( 394 scalarIntConstantExpr) || 395 construct<SelectRankCaseStmt::Rank>(star)) || 396 construct<SelectRankCaseStmt::Rank>(defaultKeyword), 397 maybe(name)))) 398 399 // R1152 select-type-construct -> 400 // select-type-stmt [type-guard-stmt block]... end-select-type-stmt 401 TYPE_CONTEXT_PARSER("SELECT TYPE construct"_en_US, 402 construct<SelectTypeConstruct>(statement(Parser<SelectTypeStmt>{}), 403 many(construct<SelectTypeConstruct::TypeCase>( 404 unambiguousStatement(Parser<TypeGuardStmt>{}), block)), 405 statement(endSelectStmt))) 406 407 // R1153 select-type-stmt -> 408 // [select-construct-name :] SELECT TYPE 409 // ( [associate-name =>] selector ) 410 TYPE_CONTEXT_PARSER("SELECT TYPE statement"_en_US, 411 construct<SelectTypeStmt>(maybe(name / ":"), 412 "SELECT TYPE (" >> maybe(name / "=>"), selector / ")")) 413 414 // R1154 type-guard-stmt -> 415 // TYPE IS ( type-spec ) [select-construct-name] | 416 // CLASS IS ( derived-type-spec ) [select-construct-name] | 417 // CLASS DEFAULT [select-construct-name] 418 TYPE_CONTEXT_PARSER("type guard statement"_en_US, 419 construct<TypeGuardStmt>("TYPE IS"_sptok >> 420 parenthesized(construct<TypeGuardStmt::Guard>(typeSpec)) || 421 "CLASS IS"_sptok >> parenthesized(construct<TypeGuardStmt::Guard>( 422 derivedTypeSpec)) || 423 construct<TypeGuardStmt::Guard>("CLASS" >> defaultKeyword), 424 maybe(name))) 425 426 // R1156 exit-stmt -> EXIT [construct-name] 427 TYPE_CONTEXT_PARSER( 428 "EXIT statement"_en_US, construct<ExitStmt>("EXIT" >> maybe(name))) 429 430 // R1157 goto-stmt -> GO TO label 431 TYPE_CONTEXT_PARSER( 432 "GOTO statement"_en_US, construct<GotoStmt>("GO TO" >> label)) 433 434 // R1158 computed-goto-stmt -> GO TO ( label-list ) [,] scalar-int-expr 435 TYPE_CONTEXT_PARSER("computed GOTO statement"_en_US, 436 construct<ComputedGotoStmt>("GO TO" >> parenthesized(nonemptyList(label)), 437 maybe(","_tok) >> scalarIntExpr)) 438 439 // R1160 stop-stmt -> STOP [stop-code] [, QUIET = scalar-logical-expr] 440 // R1161 error-stop-stmt -> 441 // ERROR STOP [stop-code] [, QUIET = scalar-logical-expr] 442 TYPE_CONTEXT_PARSER("STOP statement"_en_US, 443 construct<StopStmt>("STOP" >> pure(StopStmt::Kind::Stop) || 444 "ERROR STOP"_sptok >> pure(StopStmt::Kind::ErrorStop), 445 maybe(Parser<StopCode>{}), maybe(", QUIET =" >> scalarLogicalExpr))) 446 447 // R1162 stop-code -> scalar-default-char-expr | scalar-int-expr 448 // The two alternatives for stop-code can't be distinguished at 449 // parse time. 450 TYPE_PARSER(construct<StopCode>(scalar(expr))) 451 452 // R1164 sync-all-stmt -> SYNC ALL [( [sync-stat-list] )] 453 TYPE_CONTEXT_PARSER("SYNC ALL statement"_en_US, 454 construct<SyncAllStmt>("SYNC ALL"_sptok >> 455 defaulted(parenthesized(optionalList(statOrErrmsg))))) 456 457 // R1166 sync-images-stmt -> SYNC IMAGES ( image-set [, sync-stat-list] ) 458 // R1167 image-set -> int-expr | * 459 TYPE_CONTEXT_PARSER("SYNC IMAGES statement"_en_US, 460 "SYNC IMAGES"_sptok >> parenthesized(construct<SyncImagesStmt>( 461 construct<SyncImagesStmt::ImageSet>(intExpr) || 462 construct<SyncImagesStmt::ImageSet>(star), 463 defaulted("," >> nonemptyList(statOrErrmsg))))) 464 465 // R1168 sync-memory-stmt -> SYNC MEMORY [( [sync-stat-list] )] 466 TYPE_CONTEXT_PARSER("SYNC MEMORY statement"_en_US, 467 construct<SyncMemoryStmt>("SYNC MEMORY"_sptok >> 468 defaulted(parenthesized(optionalList(statOrErrmsg))))) 469 470 // R1169 sync-team-stmt -> SYNC TEAM ( team-value [, sync-stat-list] ) 471 TYPE_CONTEXT_PARSER("SYNC TEAM statement"_en_US, 472 construct<SyncTeamStmt>("SYNC TEAM"_sptok >> "("_tok >> teamValue, 473 defaulted("," >> nonemptyList(statOrErrmsg)) / ")")) 474 475 // R1170 event-post-stmt -> EVENT POST ( event-variable [, sync-stat-list] ) 476 // R1171 event-variable -> scalar-variable 477 TYPE_CONTEXT_PARSER("EVENT POST statement"_en_US, 478 construct<EventPostStmt>("EVENT POST"_sptok >> "("_tok >> scalar(variable), 479 defaulted("," >> nonemptyList(statOrErrmsg)) / ")")) 480 481 // R1172 event-wait-stmt -> 482 // EVENT WAIT ( event-variable [, event-wait-spec-list] ) 483 TYPE_CONTEXT_PARSER("EVENT WAIT statement"_en_US, 484 construct<EventWaitStmt>("EVENT WAIT"_sptok >> "("_tok >> scalar(variable), 485 defaulted("," >> nonemptyList(Parser<EventWaitStmt::EventWaitSpec>{})) / 486 ")")) 487 488 // R1174 until-spec -> UNTIL_COUNT = scalar-int-expr 489 constexpr auto untilSpec{"UNTIL_COUNT =" >> scalarIntExpr}; 490 491 // R1173 event-wait-spec -> until-spec | sync-stat 492 TYPE_PARSER(construct<EventWaitStmt::EventWaitSpec>(untilSpec) || 493 construct<EventWaitStmt::EventWaitSpec>(statOrErrmsg)) 494 495 // R1177 team-variable -> scalar-variable 496 constexpr auto teamVariable{scalar(variable)}; 497 498 // R1175 form-team-stmt -> 499 // FORM TEAM ( team-number , team-variable [, form-team-spec-list] ) 500 // R1176 team-number -> scalar-int-expr 501 TYPE_CONTEXT_PARSER("FORM TEAM statement"_en_US, 502 construct<FormTeamStmt>("FORM TEAM"_sptok >> "("_tok >> scalarIntExpr, 503 "," >> teamVariable, 504 defaulted("," >> nonemptyList(Parser<FormTeamStmt::FormTeamSpec>{})) / 505 ")")) 506 507 // R1178 form-team-spec -> NEW_INDEX = scalar-int-expr | sync-stat 508 TYPE_PARSER( 509 construct<FormTeamStmt::FormTeamSpec>("NEW_INDEX =" >> scalarIntExpr) || 510 construct<FormTeamStmt::FormTeamSpec>(statOrErrmsg)) 511 512 // R1182 lock-variable -> scalar-variable 513 constexpr auto lockVariable{scalar(variable)}; 514 515 // R1179 lock-stmt -> LOCK ( lock-variable [, lock-stat-list] ) 516 TYPE_CONTEXT_PARSER("LOCK statement"_en_US, 517 construct<LockStmt>("LOCK (" >> lockVariable, 518 defaulted("," >> nonemptyList(Parser<LockStmt::LockStat>{})) / ")")) 519 520 // R1180 lock-stat -> ACQUIRED_LOCK = scalar-logical-variable | sync-stat 521 TYPE_PARSER( 522 construct<LockStmt::LockStat>("ACQUIRED_LOCK =" >> scalarLogicalVariable) || 523 construct<LockStmt::LockStat>(statOrErrmsg)) 524 525 // R1181 unlock-stmt -> UNLOCK ( lock-variable [, sync-stat-list] ) 526 TYPE_CONTEXT_PARSER("UNLOCK statement"_en_US, 527 construct<UnlockStmt>("UNLOCK (" >> lockVariable, 528 defaulted("," >> nonemptyList(statOrErrmsg)) / ")")) 529 530 // CUF-kernel-do-construct -> CUF-kernel-do-directive do-construct 531 // CUF-kernel-do-directive -> 532 // !$CUF KERNEL DO [ (scalar-int-constant-expr) ] <<< grid, block [, stream] 533 // >>> do-construct 534 // grid -> * | scalar-int-expr | ( scalar-int-expr-list ) 535 // block -> * | scalar-int-expr | ( scalar-int-expr-list ) 536 // stream -> ( 0, | STREAM = ) scalar-int-expr 537 TYPE_PARSER(sourced(beginDirective >> "$CUF KERNEL DO"_tok >> 538 construct<CUFKernelDoConstruct::Directive>( 539 maybe(parenthesized(scalarIntConstantExpr)), 540 "<<<" >> 541 ("*" >> pure<std::list<ScalarIntExpr>>() || 542 parenthesized(nonemptyList(scalarIntExpr)) || 543 applyFunction(singletonList<ScalarIntExpr>, scalarIntExpr)), 544 "," >> ("*" >> pure<std::list<ScalarIntExpr>>() || 545 parenthesized(nonemptyList(scalarIntExpr)) || 546 applyFunction(singletonList<ScalarIntExpr>, scalarIntExpr)), 547 maybe((", 0 ,"_tok || ", STREAM ="_tok) >> scalarIntExpr) / ">>>" / 548 endDirective))) 549 TYPE_CONTEXT_PARSER("!$CUF KERNEL DO construct"_en_US, 550 extension<LanguageFeature::CUDA>(construct<CUFKernelDoConstruct>( 551 Parser<CUFKernelDoConstruct::Directive>{}, 552 maybe(Parser<DoConstruct>{})))) 553 554 } // namespace Fortran::parser 555