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 | notify-wait-stmt | 96 // nullify-stmt | open-stmt | pointer-assignment-stmt | print-stmt | 97 // read-stmt | 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<NotifyWaitStmt>{})), 123 construct<ActionStmt>(indirect(Parser<NullifyStmt>{})), 124 construct<ActionStmt>(indirect(Parser<OpenStmt>{})), 125 construct<ActionStmt>(indirect(Parser<PrintStmt>{})), 126 construct<ActionStmt>(indirect(Parser<ReadStmt>{})), 127 construct<ActionStmt>(indirect(Parser<ReturnStmt>{})), 128 construct<ActionStmt>(indirect(Parser<RewindStmt>{})), 129 construct<ActionStmt>(indirect(Parser<StopStmt>{})), // & error-stop-stmt 130 construct<ActionStmt>(indirect(Parser<SyncAllStmt>{})), 131 construct<ActionStmt>(indirect(Parser<SyncImagesStmt>{})), 132 construct<ActionStmt>(indirect(Parser<SyncMemoryStmt>{})), 133 construct<ActionStmt>(indirect(Parser<SyncTeamStmt>{})), 134 construct<ActionStmt>(indirect(Parser<UnlockStmt>{})), 135 construct<ActionStmt>(indirect(Parser<WaitStmt>{})), 136 construct<ActionStmt>(indirect(whereStmt)), 137 construct<ActionStmt>(indirect(Parser<WriteStmt>{})), 138 construct<ActionStmt>(indirect(Parser<ComputedGotoStmt>{})), 139 construct<ActionStmt>(indirect(forallStmt)), 140 construct<ActionStmt>(indirect(Parser<ArithmeticIfStmt>{})), 141 construct<ActionStmt>(indirect(Parser<AssignStmt>{})), 142 construct<ActionStmt>(indirect(Parser<AssignedGotoStmt>{})), 143 construct<ActionStmt>(indirect(Parser<PauseStmt>{})))) 144 145 // R1102 associate-construct -> associate-stmt block end-associate-stmt 146 TYPE_CONTEXT_PARSER("ASSOCIATE construct"_en_US, 147 construct<AssociateConstruct>(statement(Parser<AssociateStmt>{}), block, 148 statement(Parser<EndAssociateStmt>{}))) 149 150 // R1103 associate-stmt -> 151 // [associate-construct-name :] ASSOCIATE ( association-list ) 152 TYPE_CONTEXT_PARSER("ASSOCIATE statement"_en_US, 153 construct<AssociateStmt>(maybe(name / ":"), 154 "ASSOCIATE" >> parenthesized(nonemptyList(Parser<Association>{})))) 155 156 // R1104 association -> associate-name => selector 157 TYPE_PARSER(construct<Association>(name, "=>" >> selector)) 158 159 // R1105 selector -> expr | variable 160 TYPE_PARSER(construct<Selector>(variable) / lookAhead(","_tok || ")"_tok) || 161 construct<Selector>(expr)) 162 163 // R1106 end-associate-stmt -> END ASSOCIATE [associate-construct-name] 164 TYPE_PARSER(construct<EndAssociateStmt>(recovery( 165 "END ASSOCIATE" >> maybe(name), namedConstructEndStmtErrorRecovery))) 166 167 // R1107 block-construct -> 168 // block-stmt [block-specification-part] block end-block-stmt 169 TYPE_CONTEXT_PARSER("BLOCK construct"_en_US, 170 construct<BlockConstruct>(statement(Parser<BlockStmt>{}), 171 Parser<BlockSpecificationPart>{}, // can be empty 172 block, statement(Parser<EndBlockStmt>{}))) 173 174 // R1108 block-stmt -> [block-construct-name :] BLOCK 175 TYPE_PARSER(construct<BlockStmt>(maybe(name / ":") / "BLOCK")) 176 177 // R1109 block-specification-part -> 178 // [use-stmt]... [import-stmt]... [implicit-part] 179 // [[declaration-construct]... specification-construct] 180 // C1107 prohibits COMMON, EQUIVALENCE, INTENT, NAMELIST, OPTIONAL, VALUE, 181 // and statement function definitions. C1108 prohibits SAVE /common/. 182 // C1570 indirectly prohibits ENTRY. These constraints are best enforced later. 183 // The odd grammar rule above would have the effect of forcing any 184 // trailing FORMAT and DATA statements after the last specification-construct 185 // to be recognized as part of the block-construct's block part rather than 186 // its block-specification-part, a distinction without any apparent difference. 187 TYPE_PARSER(construct<BlockSpecificationPart>(specificationPart)) 188 189 // R1110 end-block-stmt -> END BLOCK [block-construct-name] 190 TYPE_PARSER(construct<EndBlockStmt>( 191 recovery("END BLOCK" >> maybe(name), namedConstructEndStmtErrorRecovery))) 192 193 // R1111 change-team-construct -> change-team-stmt block end-change-team-stmt 194 TYPE_CONTEXT_PARSER("CHANGE TEAM construct"_en_US, 195 construct<ChangeTeamConstruct>(statement(Parser<ChangeTeamStmt>{}), block, 196 statement(Parser<EndChangeTeamStmt>{}))) 197 198 // R1112 change-team-stmt -> 199 // [team-construct-name :] CHANGE TEAM 200 // ( team-value [, coarray-association-list] [, sync-stat-list] ) 201 TYPE_CONTEXT_PARSER("CHANGE TEAM statement"_en_US, 202 construct<ChangeTeamStmt>(maybe(name / ":"), 203 "CHANGE TEAM"_sptok >> "("_tok >> teamValue, 204 defaulted("," >> nonemptyList(Parser<CoarrayAssociation>{})), 205 defaulted("," >> nonemptyList(statOrErrmsg))) / 206 ")") 207 208 // R1113 coarray-association -> codimension-decl => selector 209 TYPE_PARSER( 210 construct<CoarrayAssociation>(Parser<CodimensionDecl>{}, "=>" >> selector)) 211 212 // R1114 end-change-team-stmt -> 213 // END TEAM [( [sync-stat-list] )] [team-construct-name] 214 TYPE_CONTEXT_PARSER("END TEAM statement"_en_US, 215 construct<EndChangeTeamStmt>( 216 "END TEAM" >> defaulted(parenthesized(optionalList(statOrErrmsg))), 217 maybe(name))) 218 219 // R1117 critical-stmt -> 220 // [critical-construct-name :] CRITICAL [( [sync-stat-list] )] 221 TYPE_CONTEXT_PARSER("CRITICAL statement"_en_US, 222 construct<CriticalStmt>(maybe(name / ":"), 223 "CRITICAL" >> defaulted(parenthesized(optionalList(statOrErrmsg))))) 224 225 // R1116 critical-construct -> critical-stmt block end-critical-stmt 226 TYPE_CONTEXT_PARSER("CRITICAL construct"_en_US, 227 construct<CriticalConstruct>(statement(Parser<CriticalStmt>{}), block, 228 statement(Parser<EndCriticalStmt>{}))) 229 230 // R1118 end-critical-stmt -> END CRITICAL [critical-construct-name] 231 TYPE_PARSER(construct<EndCriticalStmt>(recovery( 232 "END CRITICAL" >> maybe(name), namedConstructEndStmtErrorRecovery))) 233 234 // R1119 do-construct -> do-stmt block end-do 235 // R1120 do-stmt -> nonlabel-do-stmt | label-do-stmt 236 TYPE_CONTEXT_PARSER("DO construct"_en_US, 237 construct<DoConstruct>( 238 statement(Parser<NonLabelDoStmt>{}) / EnterNonlabelDoConstruct{}, block, 239 statement(Parser<EndDoStmt>{}) / LeaveDoConstruct{})) 240 241 // R1125 concurrent-header -> 242 // ( [integer-type-spec ::] concurrent-control-list 243 // [, scalar-mask-expr] ) 244 TYPE_PARSER(parenthesized(construct<ConcurrentHeader>( 245 maybe(integerTypeSpec / "::"), nonemptyList(Parser<ConcurrentControl>{}), 246 maybe("," >> scalarLogicalExpr)))) 247 248 // R1126 concurrent-control -> 249 // index-name = concurrent-limit : concurrent-limit [: concurrent-step] 250 // R1127 concurrent-limit -> scalar-int-expr 251 // R1128 concurrent-step -> scalar-int-expr 252 TYPE_PARSER(construct<ConcurrentControl>(name / "=", scalarIntExpr / ":", 253 scalarIntExpr, maybe(":" >> scalarIntExpr))) 254 255 // R1130 locality-spec -> 256 // LOCAL ( variable-name-list ) | LOCAL_INIT ( variable-name-list ) | 257 // SHARED ( variable-name-list ) | DEFAULT ( NONE ) 258 TYPE_PARSER(construct<LocalitySpec>(construct<LocalitySpec::Local>( 259 "LOCAL" >> parenthesized(listOfNames))) || 260 construct<LocalitySpec>(construct<LocalitySpec::LocalInit>( 261 "LOCAL_INIT"_sptok >> parenthesized(listOfNames))) || 262 construct<LocalitySpec>(construct<LocalitySpec::Shared>( 263 "SHARED" >> parenthesized(listOfNames))) || 264 construct<LocalitySpec>( 265 construct<LocalitySpec::DefaultNone>("DEFAULT ( NONE )"_tok))) 266 267 // R1123 loop-control -> 268 // [,] do-variable = scalar-int-expr , scalar-int-expr 269 // [, scalar-int-expr] | 270 // [,] WHILE ( scalar-logical-expr ) | 271 // [,] CONCURRENT concurrent-header concurrent-locality 272 // R1129 concurrent-locality -> [locality-spec]... 273 TYPE_CONTEXT_PARSER("loop control"_en_US, 274 maybe(","_tok) >> 275 (construct<LoopControl>(loopBounds(scalarExpr)) || 276 construct<LoopControl>( 277 "WHILE" >> parenthesized(scalarLogicalExpr)) || 278 construct<LoopControl>(construct<LoopControl::Concurrent>( 279 "CONCURRENT" >> concurrentHeader, 280 many(Parser<LocalitySpec>{}))))) 281 282 // R1121 label-do-stmt -> [do-construct-name :] DO label [loop-control] 283 // A label-do-stmt with a do-construct-name is parsed as a nonlabel-do-stmt 284 // with an optional label. 285 TYPE_CONTEXT_PARSER("label DO statement"_en_US, 286 construct<LabelDoStmt>("DO" >> label, maybe(loopControl))) 287 288 // R1122 nonlabel-do-stmt -> [do-construct-name :] DO [loop-control] 289 TYPE_CONTEXT_PARSER("nonlabel DO statement"_en_US, 290 construct<NonLabelDoStmt>( 291 name / ":", "DO" >> maybe(label), maybe(loopControl)) || 292 construct<NonLabelDoStmt>(construct<std::optional<Name>>(), 293 construct<std::optional<Label>>(), "DO" >> maybe(loopControl))) 294 295 // R1132 end-do-stmt -> END DO [do-construct-name] 296 TYPE_CONTEXT_PARSER("END DO statement"_en_US, 297 construct<EndDoStmt>( 298 recovery("END DO" >> maybe(name), namedConstructEndStmtErrorRecovery))) 299 300 // R1133 cycle-stmt -> CYCLE [do-construct-name] 301 TYPE_CONTEXT_PARSER( 302 "CYCLE statement"_en_US, construct<CycleStmt>("CYCLE" >> maybe(name))) 303 304 // R1134 if-construct -> 305 // if-then-stmt block [else-if-stmt block]... 306 // [else-stmt block] end-if-stmt 307 // R1135 if-then-stmt -> [if-construct-name :] IF ( scalar-logical-expr ) 308 // THEN R1136 else-if-stmt -> 309 // ELSE IF ( scalar-logical-expr ) THEN [if-construct-name] 310 // R1137 else-stmt -> ELSE [if-construct-name] 311 // R1138 end-if-stmt -> END IF [if-construct-name] 312 TYPE_CONTEXT_PARSER("IF construct"_en_US, 313 construct<IfConstruct>( 314 statement(construct<IfThenStmt>(maybe(name / ":"), 315 "IF" >> parenthesized(scalarLogicalExpr) / 316 recovery("THEN"_tok, lookAhead(endOfStmt)))), 317 block, 318 many(construct<IfConstruct::ElseIfBlock>( 319 unambiguousStatement(construct<ElseIfStmt>( 320 "ELSE IF" >> parenthesized(scalarLogicalExpr), 321 recovery("THEN"_tok, ok) >> maybe(name))), 322 block)), 323 maybe(construct<IfConstruct::ElseBlock>( 324 statement(construct<ElseStmt>("ELSE" >> maybe(name))), block)), 325 statement(construct<EndIfStmt>(recovery( 326 "END IF" >> maybe(name), namedConstructEndStmtErrorRecovery))))) 327 328 // R1139 if-stmt -> IF ( scalar-logical-expr ) action-stmt 329 TYPE_CONTEXT_PARSER("IF statement"_en_US, 330 construct<IfStmt>("IF" >> parenthesized(scalarLogicalExpr), 331 unlabeledStatement(actionStmt))) 332 333 // R1140 case-construct -> 334 // select-case-stmt [case-stmt block]... end-select-stmt 335 TYPE_CONTEXT_PARSER("SELECT CASE construct"_en_US, 336 construct<CaseConstruct>(statement(Parser<SelectCaseStmt>{}), 337 many(construct<CaseConstruct::Case>( 338 unambiguousStatement(Parser<CaseStmt>{}), block)), 339 statement(endSelectStmt))) 340 341 // R1141 select-case-stmt -> [case-construct-name :] SELECT CASE ( case-expr 342 // ) R1144 case-expr -> scalar-expr 343 TYPE_CONTEXT_PARSER("SELECT CASE statement"_en_US, 344 construct<SelectCaseStmt>( 345 maybe(name / ":"), "SELECT CASE" >> parenthesized(scalar(expr)))) 346 347 // R1142 case-stmt -> CASE case-selector [case-construct-name] 348 TYPE_CONTEXT_PARSER("CASE statement"_en_US, 349 construct<CaseStmt>("CASE" >> Parser<CaseSelector>{}, maybe(name))) 350 351 // R1143 end-select-stmt -> END SELECT [case-construct-name] 352 // R1151 end-select-rank-stmt -> END SELECT [select-construct-name] 353 // R1155 end-select-type-stmt -> END SELECT [select-construct-name] 354 TYPE_PARSER(construct<EndSelectStmt>( 355 recovery("END SELECT" >> maybe(name), namedConstructEndStmtErrorRecovery))) 356 357 // R1145 case-selector -> ( case-value-range-list ) | DEFAULT 358 constexpr auto defaultKeyword{construct<Default>("DEFAULT"_tok)}; 359 TYPE_PARSER(parenthesized(construct<CaseSelector>( 360 nonemptyList(Parser<CaseValueRange>{}))) || 361 construct<CaseSelector>(defaultKeyword)) 362 363 // R1147 case-value -> scalar-constant-expr 364 constexpr auto caseValue{scalar(constantExpr)}; 365 366 // R1146 case-value-range -> 367 // case-value | case-value : | : case-value | case-value : case-value 368 TYPE_PARSER(construct<CaseValueRange>(construct<CaseValueRange::Range>( 369 construct<std::optional<CaseValue>>(caseValue), 370 ":" >> maybe(caseValue))) || 371 construct<CaseValueRange>( 372 construct<CaseValueRange::Range>(construct<std::optional<CaseValue>>(), 373 ":" >> construct<std::optional<CaseValue>>(caseValue))) || 374 construct<CaseValueRange>(caseValue)) 375 376 // R1148 select-rank-construct -> 377 // select-rank-stmt [select-rank-case-stmt block]... 378 // end-select-rank-stmt 379 TYPE_CONTEXT_PARSER("SELECT RANK construct"_en_US, 380 construct<SelectRankConstruct>(statement(Parser<SelectRankStmt>{}), 381 many(construct<SelectRankConstruct::RankCase>( 382 unambiguousStatement(Parser<SelectRankCaseStmt>{}), block)), 383 statement(endSelectStmt))) 384 385 // R1149 select-rank-stmt -> 386 // [select-construct-name :] SELECT RANK 387 // ( [associate-name =>] selector ) 388 TYPE_CONTEXT_PARSER("SELECT RANK statement"_en_US, 389 construct<SelectRankStmt>(maybe(name / ":"), 390 "SELECT RANK"_sptok >> "("_tok >> maybe(name / "=>"), selector / ")")) 391 392 // R1150 select-rank-case-stmt -> 393 // RANK ( scalar-int-constant-expr ) [select-construct-name] | 394 // RANK ( * ) [select-construct-name] | 395 // RANK DEFAULT [select-construct-name] 396 TYPE_CONTEXT_PARSER("RANK case statement"_en_US, 397 "RANK" >> (construct<SelectRankCaseStmt>( 398 parenthesized(construct<SelectRankCaseStmt::Rank>( 399 scalarIntConstantExpr) || 400 construct<SelectRankCaseStmt::Rank>(star)) || 401 construct<SelectRankCaseStmt::Rank>(defaultKeyword), 402 maybe(name)))) 403 404 // R1152 select-type-construct -> 405 // select-type-stmt [type-guard-stmt block]... end-select-type-stmt 406 TYPE_CONTEXT_PARSER("SELECT TYPE construct"_en_US, 407 construct<SelectTypeConstruct>(statement(Parser<SelectTypeStmt>{}), 408 many(construct<SelectTypeConstruct::TypeCase>( 409 unambiguousStatement(Parser<TypeGuardStmt>{}), block)), 410 statement(endSelectStmt))) 411 412 // R1153 select-type-stmt -> 413 // [select-construct-name :] SELECT TYPE 414 // ( [associate-name =>] selector ) 415 TYPE_CONTEXT_PARSER("SELECT TYPE statement"_en_US, 416 construct<SelectTypeStmt>(maybe(name / ":"), 417 "SELECT TYPE (" >> maybe(name / "=>"), selector / ")")) 418 419 // R1154 type-guard-stmt -> 420 // TYPE IS ( type-spec ) [select-construct-name] | 421 // CLASS IS ( derived-type-spec ) [select-construct-name] | 422 // CLASS DEFAULT [select-construct-name] 423 TYPE_CONTEXT_PARSER("type guard statement"_en_US, 424 construct<TypeGuardStmt>("TYPE IS"_sptok >> 425 parenthesized(construct<TypeGuardStmt::Guard>(typeSpec)) || 426 "CLASS IS"_sptok >> parenthesized(construct<TypeGuardStmt::Guard>( 427 derivedTypeSpec)) || 428 construct<TypeGuardStmt::Guard>("CLASS" >> defaultKeyword), 429 maybe(name))) 430 431 // R1156 exit-stmt -> EXIT [construct-name] 432 TYPE_CONTEXT_PARSER( 433 "EXIT statement"_en_US, construct<ExitStmt>("EXIT" >> maybe(name))) 434 435 // R1157 goto-stmt -> GO TO label 436 TYPE_CONTEXT_PARSER( 437 "GOTO statement"_en_US, construct<GotoStmt>("GO TO" >> label)) 438 439 // R1158 computed-goto-stmt -> GO TO ( label-list ) [,] scalar-int-expr 440 TYPE_CONTEXT_PARSER("computed GOTO statement"_en_US, 441 construct<ComputedGotoStmt>("GO TO" >> parenthesized(nonemptyList(label)), 442 maybe(","_tok) >> scalarIntExpr)) 443 444 // R1160 stop-stmt -> STOP [stop-code] [, QUIET = scalar-logical-expr] 445 // R1161 error-stop-stmt -> 446 // ERROR STOP [stop-code] [, QUIET = scalar-logical-expr] 447 TYPE_CONTEXT_PARSER("STOP statement"_en_US, 448 construct<StopStmt>("STOP" >> pure(StopStmt::Kind::Stop) || 449 "ERROR STOP"_sptok >> pure(StopStmt::Kind::ErrorStop), 450 maybe(Parser<StopCode>{}), maybe(", QUIET =" >> scalarLogicalExpr))) 451 452 // R1162 stop-code -> scalar-default-char-expr | scalar-int-expr 453 // The two alternatives for stop-code can't be distinguished at 454 // parse time. 455 TYPE_PARSER(construct<StopCode>(scalar(expr))) 456 457 // F2030: R1166 notify-wait-stmt -> 458 // NOTIFY WAIT ( notify-variable [, event-wait-spec-list] ) 459 TYPE_CONTEXT_PARSER("NOTIFY WAIT statement"_en_US, 460 construct<NotifyWaitStmt>( 461 "NOTIFY WAIT"_sptok >> "("_tok >> scalar(variable), 462 defaulted("," >> nonemptyList(Parser<EventWaitSpec>{})) / ")")) 463 464 // R1164 sync-all-stmt -> SYNC ALL [( [sync-stat-list] )] 465 TYPE_CONTEXT_PARSER("SYNC ALL statement"_en_US, 466 construct<SyncAllStmt>("SYNC ALL"_sptok >> 467 defaulted(parenthesized(optionalList(statOrErrmsg))))) 468 469 // R1166 sync-images-stmt -> SYNC IMAGES ( image-set [, sync-stat-list] ) 470 // R1167 image-set -> int-expr | * 471 TYPE_CONTEXT_PARSER("SYNC IMAGES statement"_en_US, 472 "SYNC IMAGES"_sptok >> parenthesized(construct<SyncImagesStmt>( 473 construct<SyncImagesStmt::ImageSet>(intExpr) || 474 construct<SyncImagesStmt::ImageSet>(star), 475 defaulted("," >> nonemptyList(statOrErrmsg))))) 476 477 // R1168 sync-memory-stmt -> SYNC MEMORY [( [sync-stat-list] )] 478 TYPE_CONTEXT_PARSER("SYNC MEMORY statement"_en_US, 479 construct<SyncMemoryStmt>("SYNC MEMORY"_sptok >> 480 defaulted(parenthesized(optionalList(statOrErrmsg))))) 481 482 // R1169 sync-team-stmt -> SYNC TEAM ( team-value [, sync-stat-list] ) 483 TYPE_CONTEXT_PARSER("SYNC TEAM statement"_en_US, 484 construct<SyncTeamStmt>("SYNC TEAM"_sptok >> "("_tok >> teamValue, 485 defaulted("," >> nonemptyList(statOrErrmsg)) / ")")) 486 487 // R1170 event-post-stmt -> EVENT POST ( event-variable [, sync-stat-list] ) 488 // R1171 event-variable -> scalar-variable 489 TYPE_CONTEXT_PARSER("EVENT POST statement"_en_US, 490 construct<EventPostStmt>("EVENT POST"_sptok >> "("_tok >> scalar(variable), 491 defaulted("," >> nonemptyList(statOrErrmsg)) / ")")) 492 493 // R1172 event-wait-stmt -> 494 // EVENT WAIT ( event-variable [, event-wait-spec-list] ) 495 TYPE_CONTEXT_PARSER("EVENT WAIT statement"_en_US, 496 construct<EventWaitStmt>("EVENT WAIT"_sptok >> "("_tok >> scalar(variable), 497 defaulted("," >> nonemptyList(Parser<EventWaitSpec>{})) / ")")) 498 499 // R1174 until-spec -> UNTIL_COUNT = scalar-int-expr 500 constexpr auto untilSpec{"UNTIL_COUNT =" >> scalarIntExpr}; 501 502 // R1173 event-wait-spec -> until-spec | sync-stat 503 TYPE_PARSER(construct<EventWaitSpec>(untilSpec) || 504 construct<EventWaitSpec>(statOrErrmsg)) 505 506 // R1177 team-variable -> scalar-variable 507 constexpr auto teamVariable{scalar(variable)}; 508 509 // R1175 form-team-stmt -> 510 // FORM TEAM ( team-number , team-variable [, form-team-spec-list] ) 511 // R1176 team-number -> scalar-int-expr 512 TYPE_CONTEXT_PARSER("FORM TEAM statement"_en_US, 513 construct<FormTeamStmt>("FORM TEAM"_sptok >> "("_tok >> scalarIntExpr, 514 "," >> teamVariable, 515 defaulted("," >> nonemptyList(Parser<FormTeamStmt::FormTeamSpec>{})) / 516 ")")) 517 518 // R1178 form-team-spec -> NEW_INDEX = scalar-int-expr | sync-stat 519 TYPE_PARSER( 520 construct<FormTeamStmt::FormTeamSpec>("NEW_INDEX =" >> scalarIntExpr) || 521 construct<FormTeamStmt::FormTeamSpec>(statOrErrmsg)) 522 523 // R1182 lock-variable -> scalar-variable 524 constexpr auto lockVariable{scalar(variable)}; 525 526 // R1179 lock-stmt -> LOCK ( lock-variable [, lock-stat-list] ) 527 TYPE_CONTEXT_PARSER("LOCK statement"_en_US, 528 construct<LockStmt>("LOCK (" >> lockVariable, 529 defaulted("," >> nonemptyList(Parser<LockStmt::LockStat>{})) / ")")) 530 531 // R1180 lock-stat -> ACQUIRED_LOCK = scalar-logical-variable | sync-stat 532 TYPE_PARSER( 533 construct<LockStmt::LockStat>("ACQUIRED_LOCK =" >> scalarLogicalVariable) || 534 construct<LockStmt::LockStat>(statOrErrmsg)) 535 536 // R1181 unlock-stmt -> UNLOCK ( lock-variable [, sync-stat-list] ) 537 TYPE_CONTEXT_PARSER("UNLOCK statement"_en_US, 538 construct<UnlockStmt>("UNLOCK (" >> lockVariable, 539 defaulted("," >> nonemptyList(statOrErrmsg)) / ")")) 540 541 // CUF-kernel-do-construct -> CUF-kernel-do-directive do-construct 542 // CUF-kernel-do-directive -> 543 // !$CUF KERNEL DO [ (scalar-int-constant-expr) ] <<< grid, block [, stream] 544 // >>> do-construct 545 // star-or-expr -> * | scalar-int-expr 546 // grid -> * | scalar-int-expr | ( star-or-expr-list ) 547 // block -> * | scalar-int-expr | ( star-or-expr-list ) 548 // stream -> ( 0, | STREAM = ) scalar-int-expr 549 constexpr auto starOrExpr{construct<CUFKernelDoConstruct::StarOrExpr>( 550 "*" >> pure<std::optional<ScalarIntExpr>>() || 551 applyFunction(presentOptional<ScalarIntExpr>, scalarIntExpr))}; 552 constexpr auto gridOrBlock{parenthesized(nonemptyList(starOrExpr)) || 553 applyFunction(singletonList<CUFKernelDoConstruct::StarOrExpr>, starOrExpr)}; 554 TYPE_PARSER(sourced(beginDirective >> "$CUF KERNEL DO"_tok >> 555 construct<CUFKernelDoConstruct::Directive>( 556 maybe(parenthesized(scalarIntConstantExpr)), "<<<" >> gridOrBlock, 557 "," >> gridOrBlock, 558 maybe((", 0 ,"_tok || ", STREAM ="_tok) >> scalarIntExpr) / ">>>" / 559 endDirective))) 560 TYPE_CONTEXT_PARSER("!$CUF KERNEL DO construct"_en_US, 561 extension<LanguageFeature::CUDA>(construct<CUFKernelDoConstruct>( 562 Parser<CUFKernelDoConstruct::Directive>{}, 563 maybe(Parser<DoConstruct>{})))) 564 565 } // namespace Fortran::parser 566