Grammar used by Flang to parse Fortran 2018.
R0001 digit -> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 R0002 letter -> A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z R0003 rep-char R401 xzy-list -> xzy [, xzy]... R402 xzy-name -> name R403 scalar-xyz -> xyz R501 program -> program-unit [program-unit]... R502 program-unit -> main-program | external-subprogram | module | submodule | block-data R503 external-subprogram -> function-subprogram | subroutine-subprogram R504 specification-part -> [use-stmt]... [import-stmt]... [implicit-part] [declaration-construct]... R505 implicit-part -> [implicit-part-stmt]... implicit-stmt R506 implicit-part-stmt -> implicit-stmt | parameter-stmt | format-stmt | entry-stmt R507 declaration-construct -> specification-construct | data-stmt | format-stmt | entry-stmt | stmt-function-stmt R508 specification-construct -> derived-type-def | enum-def | generic-stmt | interface-block | parameter-stmt | procedure-declaration-stmt | other-specification-stmt | type-declaration-stmt R509 execution-part -> executable-construct [execution-part-construct]... R510 execution-part-construct -> executable-construct | format-stmt | entry-stmt | data-stmt R511 internal-subprogram-part -> contains-stmt [internal-subprogram]... R512 internal-subprogram -> function-subprogram | subroutine-subprogram R513 other-specification-stmt -> access-stmt | allocatable-stmt | asynchronous-stmt | bind-stmt | codimension-stmt | contiguous-stmt | dimension-stmt | external-stmt | intent-stmt | intrinsic-stmt | namelist-stmt | optional-stmt | pointer-stmt | protected-stmt | save-stmt | target-stmt | volatile-stmt | value-stmt | common-stmt | equivalence-stmt R514 executable-construct -> action-stmt | associate-construct | block-construct | case-construct | change-team-construct | critical-construct | do-construct | if-construct | select-rank-construct | select-type-construct | where-construct | forall-construct R515 action-stmt -> allocate-stmt | assignment-stmt | backspace-stmt | call-stmt | close-stmt | continue-stmt | cycle-stmt | deallocate-stmt | endfile-stmt | error-stop-stmt | event-post-stmt | event-wait-stmt | exit-stmt | fail-image-stmt | flush-stmt | form-team-stmt | goto-stmt | if-stmt | inquire-stmt | lock-stmt | nullify-stmt | open-stmt | pointer-assignment-stmt | print-stmt | read-stmt | return-stmt | rewind-stmt | stop-stmt | sync-all-stmt | sync-images-stmt | sync-memory-stmt | sync-team-stmt | unlock-stmt | wait-stmt | where-stmt | write-stmt | computed-goto-stmt | forall-stmt R516 keyword -> name R601 alphanumeric-character -> letter | digit | underscore @ | $ R602 underscore -> _ R603 name -> letter [alphanumeric-character]... R604 constant -> literal-constant | named-constant R605 literal-constant -> int-literal-constant | real-literal-constant | complex-literal-constant | logical-literal-constant | char-literal-constant | boz-literal-constant R606 named-constant -> name R607 int-constant -> constant R608 intrinsic-operator -> power-op | mult-op | add-op | concat-op | rel-op | not-op | and-op | or-op | equiv-op R609 defined-operator -> defined-unary-op | defined-binary-op | extended-intrinsic-op R610 extended-intrinsic-op -> intrinsic-operator R611 label -> digit [digit]... R620 delimiter -> ( | ) | / | [ | ] | (/ | /) R701 type-param-value -> scalar-int-expr | * | : R702 type-spec -> intrinsic-type-spec | derived-type-spec R703 declaration-type-spec -> intrinsic-type-spec | TYPE ( intrinsic-type-spec ) | TYPE ( derived-type-spec ) | CLASS ( derived-type-spec ) | CLASS ( * ) | TYPE ( * ) R704 intrinsic-type-spec -> integer-type-spec | REAL [kind-selector] | DOUBLE PRECISION | COMPLEX [kind-selector] | CHARACTER [char-selector] | LOGICAL [kind-selector] @ DOUBLE COMPLEX R705 integer-type-spec -> INTEGER [kind-selector] R706 kind-selector -> ( [KIND =] scalar-int-constant-expr ) @ * scalar-int-constant-expr R707 signed-int-literal-constant -> [sign] int-literal-constant R708 int-literal-constant -> digit-string [_ kind-param] R709 kind-param -> digit-string | scalar-int-constant-name R710 signed-digit-string -> [sign] digit-string R711 digit-string -> digit [digit]... R712 sign -> + | - R713 signed-real-literal-constant -> [sign] real-literal-constant R714 real-literal-constant -> significand [exponent-letter exponent] [_ kind-param] | digit-string exponent-letter exponent [_ kind-param] R715 significand -> digit-string . [digit-string] | . digit-string R716 exponent-letter -> E | D @ | Q R717 exponent -> signed-digit-string R718 complex-literal-constant -> ( real-part , imag-part ) R719 real-part -> signed-int-literal-constant | signed-real-literal-constant | named-constant R720 imag-part -> signed-int-literal-constant | signed-real-literal-constant | named-constant R721 char-selector -> length-selector | ( LEN = type-param-value , KIND = scalar-int-constant-expr ) | ( type-param-value , [KIND =] scalar-int-constant-expr ) | ( KIND = scalar-int-constant-expr [, LEN = type-param-value] ) R722 length-selector -> ( [LEN =] type-param-value ) | * char-length [,] R723 char-length -> ( type-param-value ) | digit-string R724 char-literal-constant -> [kind-param _] ' [rep-char]... ' | [kind-param _] " [rep-char]... " R725 logical-literal-constant -> .TRUE. [_ kind-param] | .FALSE. [_ kind-param] @ | .T. | .F. R726 derived-type-def -> derived-type-stmt [type-param-def-stmt]... [private-or-sequence]... [component-part] [type-bound-procedure-part] end-type-stmt R727 derived-type-stmt -> TYPE [[, type-attr-spec-list] ::] type-name [( type-param-name-list )] R728 type-attr-spec -> ABSTRACT | access-spec | BIND(C) | EXTENDS ( parent-type-name ) R729 private-or-sequence -> private-components-stmt | sequence-stmt R730 end-type-stmt -> END TYPE [type-name] R731 sequence-stmt -> SEQUENCE R732 type-param-def-stmt -> integer-type-spec , type-param-attr-spec :: type-param-decl-list R733 type-param-decl -> type-param-name [= scalar-int-constant-expr] R734 type-param-attr-spec -> KIND | LEN R735 component-part -> [component-def-stmt]... R736 component-def-stmt -> data-component-def-stmt | proc-component-def-stmt R737 data-component-def-stmt -> declaration-type-spec [[, component-attr-spec-list] ::] component-decl-list R738 component-attr-spec -> access-spec | ALLOCATABLE | CODIMENSION lbracket coarray-spec rbracket | CONTIGUOUS | DIMENSION ( component-array-spec ) | POINTER R739 component-decl -> component-name [( component-array-spec )] [lbracket coarray-spec rbracket] [* char-length] [component-initialization] R740 component-array-spec -> explicit-shape-spec-list | deferred-shape-spec-list R741 proc-component-def-stmt -> PROCEDURE ( [proc-interface] ) , proc-component-attr-spec-list :: proc-decl-list R742 proc-component-attr-spec -> access-spec | NOPASS | PASS [(arg-name)] | POINTER R743 component-initialization -> = constant-expr | => null-init | => initial-data-target R744 initial-data-target -> designator R745 private-components-stmt -> PRIVATE R746 type-bound-procedure-part -> contains-stmt [binding-private-stmt] [type-bound-proc-binding]... R747 binding-private-stmt -> PRIVATE R748 type-bound-proc-binding -> type-bound-procedure-stmt | type-bound-generic-stmt | final-procedure-stmt R749 type-bound-procedure-stmt -> PROCEDURE [[, bind-attr-list] ::] type-bound-proc-decl-list | PROCEDURE ( interface-name ) , bind-attr-list :: binding-name-list R750 type-bound-proc-decl -> binding-name [=> procedure-name] R751 type-bound-generic-stmt -> GENERIC [, access-spec] :: generic-spec => binding-name-list R752 bind-attr -> access-spec | DEFERRED | NON_OVERRIDABLE | NOPASS | PASS [(arg-name)] R753 final-procedure-stmt -> FINAL [::] final-subroutine-name-list R754 derived-type-spec -> type-name [(type-param-spec-list)] R755 type-param-spec -> [keyword =] type-param-value R756 structure-constructor -> derived-type-spec ( [component-spec-list] ) R757 component-spec -> [keyword =] component-data-source R758 component-data-source -> expr | data-target | proc-target R759 enum-def -> enum-def-stmt enumerator-def-stmt [enumerator-def-stmt]... end-enum-stmt R760 enum-def-stmt -> ENUM, BIND(C) R761 enumerator-def-stmt -> ENUMERATOR [::] enumerator-list R762 enumerator -> named-constant [= scalar-int-constant-expr] R763 end-enum-stmt -> END ENUM R764 boz-literal-constant -> binary-constant | octal-constant | hex-constant R765 binary-constant -> B ' digit [digit]... ' | B " digit [digit]... " R766 octal-constant -> O ' digit [digit]... ' | O " digit [digit]... " R767 hex-constant -> Z ' hex-digit [hex-digit]... ' | Z " hex-digit [hex-digit]... " R768 hex-digit -> digit | A | B | C | D | E | F R769 array-constructor -> (/ ac-spec /) | lbracket ac-spec rbracket R770 ac-spec -> type-spec :: | [type-spec ::] ac-value-list R771 lbracket -> [ R772 rbracket -> ] R773 ac-value -> expr | ac-implied-do R774 ac-implied-do -> ( ac-value-list , ac-implied-do-control ) R775 ac-implied-do-control -> [integer-type-spec ::] ac-do-variable = scalar-int-expr , scalar-int-expr [, scalar-int-expr] R776 ac-do-variable -> do-variable R801 type-declaration-stmt -> declaration-type-spec [[, attr-spec]... ::] entity-decl-list R802 attr-spec -> access-spec | ALLOCATABLE | ASYNCHRONOUS | CODIMENSION lbracket coarray-spec rbracket | CONTIGUOUS | DIMENSION ( array-spec ) | EXTERNAL | INTENT ( intent-spec ) | INTRINSIC | language-binding-spec | OPTIONAL | PARAMETER | POINTER | PROTECTED | SAVE | TARGET | VALUE | VOLATILE R803 entity-decl -> object-name [( array-spec )] [lbracket coarray-spec rbracket] [* char-length] [initialization] | function-name [* char-length] R804 object-name -> name R805 initialization -> = constant-expr | => null-init | => initial-data-target R806 null-init -> function-reference {constrained to be NULL()} R807 access-spec -> PUBLIC | PRIVATE R808 language-binding-spec -> BIND ( C [, NAME = scalar-default-char-constant-expr] ) R809 coarray-spec -> deferred-coshape-spec-list | explicit-coshape-spec R810 deferred-coshape-spec -> : R811 explicit-coshape-spec -> [[lower-cobound :] upper-cobound ,]... [lower-cobound :] * R812 lower-cobound -> specification-expr R813 upper-cobound -> specification-expr R814 dimension-spec -> DIMENSION ( array-spec ) R815 array-spec -> explicit-shape-spec-list | assumed-shape-spec-list | deferred-shape-spec-list | assumed-size-spec | implied-shape-spec | implied-shape-or-assumed-size-spec | assumed-rank-spec R816 explicit-shape-spec -> [lower-bound :] upper-bound R817 lower-bound -> specification-expr R818 upper-bound -> specification-expr R819 assumed-shape-spec -> [lower-bound] : R820 deferred-shape-spec -> : R821 assumed-implied-spec -> [lower-bound :] * R822 assumed-size-spec -> explicit-shape-spec-list , assumed-implied-spec R823 implied-shape-or-assumed-size-spec -> assumed-implied-spec R824 implied-shape-spec -> assumed-implied-spec , assumed-implied-spec-list R825 assumed-rank-spec -> .. R826 intent-spec -> IN | OUT | INOUT R827 access-stmt -> access-spec [[::] access-id-list] R828 access-id -> access-name | generic-spec R829 allocatable-stmt -> ALLOCATABLE [::] allocatable-decl-list R830 allocatable-decl -> object-name [( array-spec )] [lbracket coarray-spec rbracket] R831 asynchronous-stmt -> ASYNCHRONOUS [::] object-name-list R832 bind-stmt -> language-binding-spec [::] bind-entity-list R833 bind-entity -> entity-name | / common-block-name / R834 codimension-stmt -> CODIMENSION [::] codimension-decl-list R835 codimension-decl -> coarray-name lbracket coarray-spec rbracket R836 contiguous-stmt -> CONTIGUOUS [::] object-name-list R837 data-stmt -> DATA data-stmt-set [[,] data-stmt-set]... R838 data-stmt-set -> data-stmt-object-list / data-stmt-value-list / R839 data-stmt-object -> variable | data-implied-do R840 data-implied-do -> ( data-i-do-object-list , [integer-type-spec ::] data-i-do-variable = scalar-int-constant-expr , scalar-int-constant-expr [, scalar-int-constant-expr] ) R841 data-i-do-object -> array-element | scalar-structure-component | data-implied-do R842 data-i-do-variable -> do-variable R843 data-stmt-value -> [data-stmt-repeat *] data-stmt-constant R844 data-stmt-repeat -> scalar-int-constant | scalar-int-constant-subobject R845 data-stmt-constant -> scalar-constant | scalar-constant-subobject | signed-int-literal-constant | signed-real-literal-constant | null-init | initial-data-target | structure-constructor R846 int-constant-subobject -> constant-subobject R847 constant-subobject -> designator R848 dimension-stmt -> DIMENSION [::] array-name ( array-spec ) [, array-name ( array-spec )]... R849 intent-stmt -> INTENT ( intent-spec ) [::] dummy-arg-name-list R850 optional-stmt -> OPTIONAL [::] dummy-arg-name-list R851 parameter-stmt -> PARAMETER ( named-constant-def-list ) R852 named-constant-def -> named-constant = constant-expr R853 pointer-stmt -> POINTER [::] pointer-decl-list R854 pointer-decl -> object-name [( deferred-shape-spec-list )] | proc-entity-name R855 protected-stmt -> PROTECTED [::] entity-name-list R856 save-stmt -> SAVE [[::] saved-entity-list] R857 saved-entity -> object-name | proc-pointer-name | / common-block-name / R858 proc-pointer-name -> name R859 target-stmt -> TARGET [::] target-decl-list R860 target-decl -> object-name [( array-spec )] [lbracket coarray-spec rbracket] R861 value-stmt -> VALUE [::] dummy-arg-name-list R862 volatile-stmt -> VOLATILE [::] object-name-list R863 implicit-stmt -> IMPLICIT implicit-spec-list | IMPLICIT NONE [( [implicit-name-spec-list] )] R864 implicit-spec -> declaration-type-spec ( letter-spec-list ) R865 letter-spec -> letter [- letter] R866 implicit-name-spec -> EXTERNAL | TYPE R867 import-stmt -> IMPORT [[::] import-name-list] | IMPORT , ONLY : import-name-list | IMPORT , NONE | IMPORT , ALL R868 namelist-stmt -> NAMELIST / namelist-group-name / namelist-group-object-list [[,] / namelist-group-name / namelist-group-object-list]... R869 namelist-group-object -> variable-name R870 equivalence-stmt -> EQUIVALENCE equivalence-set-list R871 equivalence-set -> ( equivalence-object , equivalence-object-list ) R872 equivalence-object -> variable-name | array-element | substring R873 common-stmt -> COMMON [/ [common-block-name] /] common-block-object-list [[,] / [common-block-name] / common-block-object-list]... R874 common-block-object -> variable-name [( array-spec )] R901 designator -> object-name | array-element | array-section | coindexed-named-object | complex-part-designator | structure-component | substring R902 variable -> designator | function-reference R903 variable-name -> name R904 logical-variable -> variable R905 char-variable -> variable R906 default-char-variable -> variable R907 int-variable -> variable R908 substring -> parent-string ( substring-range ) R909 parent-string -> scalar-variable-name | array-element | coindexed-named-object | scalar-structure-component | scalar-char-literal-constant | scalar-named-constant R910 substring-range -> [scalar-int-expr] : [scalar-int-expr] R911 data-ref -> part-ref [% part-ref]... R912 part-ref -> part-name [( section-subscript-list )] [image-selector] R913 structure-component -> data-ref R914 coindexed-named-object -> data-ref R915 complex-part-designator -> designator % RE | designator % IM R916 type-param-inquiry -> designator % type-param-name R917 array-element -> data-ref R918 array-section -> data-ref [( substring-range )] | complex-part-designator R919 subscript -> scalar-int-expr R920 section-subscript -> subscript | subscript-triplet | vector-subscript R921 subscript-triplet -> [subscript] : [subscript] [: stride] R922 stride -> scalar-int-expr R923 vector-subscript -> int-expr R924 image-selector -> lbracket cosubscript-list [, image-selector-spec-list] rbracket R925 cosubscript -> scalar-int-expr R926 image-selector-spec -> STAT = stat-variable | TEAM = team-value | TEAM_NUMBER = scalar-int-expr R927 allocate-stmt -> ALLOCATE ( [type-spec ::] allocation-list [, alloc-opt-list] ) R928 alloc-opt -> ERRMSG = errmsg-variable | MOLD = source-expr | SOURCE = source-expr | STAT = stat-variable R929 stat-variable -> scalar-int-variable R930 errmsg-variable -> scalar-default-char-variable R931 source-expr -> expr R932 allocation -> allocate-object [( allocate-shape-spec-list )] [lbracket allocate-coarray-spec rbracket] R933 allocate-object -> variable-name | structure-component R934 allocate-shape-spec -> [lower-bound-expr :] upper-bound-expr R935 lower-bound-expr -> scalar-int-expr R936 upper-bound-expr -> scalar-int-expr R937 allocate-coarray-spec -> [allocate-coshape-spec-list ,] [lower-bound-expr :] * R938 allocate-coshape-spec -> [lower-bound-expr :] upper-bound-expr R939 nullify-stmt -> NULLIFY ( pointer-object-list ) R940 pointer-object -> variable-name | structure-component | proc-pointer-name R941 deallocate-stmt -> DEALLOCATE ( allocate-object-list [, dealloc-opt-list] ) R942 dealloc-opt -> STAT = stat-variable | ERRMSG = errmsg-variable R1001 primary -> literal-constant | designator | array-constructor | structure-constructor | function-reference | type-param-inquiry | type-param-name | ( expr ) R1002 level-1-expr -> [defined-unary-op] primary R1003 defined-unary-op -> . letter [letter]... . R1004 mult-operand -> level-1-expr [power-op mult-operand] R1005 add-operand -> [add-operand mult-op] mult-operand R1006 level-2-expr -> [[level-2-expr] add-op] add-operand R1007 power-op -> ** R1008 mult-op -> * | / R1009 add-op -> + | - R1010 level-3-expr -> [level-3-expr concat-op] level-2-expr R1011 concat-op -> // R1012 level-4-expr -> [level-3-expr rel-op] level-3-expr R1013 rel-op -> .EQ. | .NE. | .LT. | .LE. | .GT. | .GE. | == | /= | < | <= | > | >= @ | <> R1014 and-operand -> [not-op] level-4-expr R1015 or-operand -> [or-operand and-op] and-operand R1016 equiv-operand -> [equiv-operand or-op] or-operand R1017 level-5-expr -> [level-5-expr equiv-op] equiv-operand R1018 not-op -> .NOT. R1019 and-op -> .AND. R1020 or-op -> .OR. R1021 equiv-op -> .EQV. | .NEQV. R1022 expr -> [expr defined-binary-op] level-5-expr R1023 defined-binary-op -> . letter [letter]... . R1024 logical-expr -> expr R1025 default-char-expr -> expr R1026 int-expr -> expr R1027 numeric-expr -> expr R1028 specification-expr -> scalar-int-expr R1029 constant-expr -> expr R1030 default-char-constant-expr -> default-char-expr R1031 int-constant-expr -> int-expr R1032 assignment-stmt -> variable = expr R1033 pointer-assignment-stmt -> data-pointer-object [( bounds-spec-list )] => data-target | data-pointer-object ( bounds-remapping-list ) => data-target | proc-pointer-object => proc-target R1034 data-pointer-object -> variable-name | scalar-variable % data-pointer-component-name R1035 bounds-spec -> lower-bound-expr : R1036 bounds-remapping -> lower-bound-expr : upper-bound-expr R1037 data-target -> expr R1038 proc-pointer-object -> proc-pointer-name | proc-component-ref R1039 proc-component-ref -> scalar-variable % procedure-component-name R1040 proc-target -> expr | procedure-name | proc-component-ref R1041 where-stmt -> WHERE ( mask-expr ) where-assignment-stmt R1042 where-construct -> where-construct-stmt [where-body-construct]... [masked-elsewhere-stmt [where-body-construct]...]... [elsewhere-stmt [where-body-construct]...] end-where-stmt R1043 where-construct-stmt -> [where-construct-name :] WHERE ( mask-expr ) R1044 where-body-construct -> where-assignment-stmt | where-stmt | where-construct R1045 where-assignment-stmt -> assignment-stmt R1046 mask-expr -> logical-expr R1047 masked-elsewhere-stmt -> ELSEWHERE ( mask-expr ) [where-construct-name] R1048 elsewhere-stmt -> ELSEWHERE [where-construct-name] R1049 end-where-stmt -> END WHERE [where-construct-name] R1050 forall-construct -> forall-construct-stmt [forall-body-construct]... end-forall-stmt R1051 forall-construct-stmt -> [forall-construct-name :] FORALL concurrent-header R1052 forall-body-construct -> forall-assignment-stmt | where-stmt | where-construct | forall-construct | forall-stmt R1053 forall-assignment-stmt -> assignment-stmt | pointer-assignment-stmt R1054 end-forall-stmt -> END FORALL [forall-construct-name] R1055 forall-stmt -> FORALL concurrent-header forall-assignment-stmt R1101 block -> [execution-part-construct]... R1102 associate-construct -> associate-stmt block end-associate-stmt R1103 associate-stmt -> [associate-construct-name :] ASSOCIATE ( association-list ) R1104 association -> associate-name => selector R1105 selector -> expr | variable R1106 end-associate-stmt -> END ASSOCIATE [associate-construct-name] R1107 block-construct -> block-stmt [block-specification-part] block end-block-stmt R1108 block-stmt -> [block-construct-name :] BLOCK R1109 block-specification-part -> [use-stmt]... [import-stmt]... [[declaration-construct]... specification-construct] R1110 end-block-stmt -> END BLOCK [block-construct-name] R1111 change-team-construct -> change-team-stmt block end-change-team-stmt R1112 change-team-stmt -> [team-construct-name :] CHANGE TEAM ( team-value [, coarray-association-list] [, sync-stat-list] ) R1113 coarray-association -> codimension-decl => selector R1114 end-change-team-stmt -> END TEAM [( [sync-stat-list] )] [team-construct-name] R1115 team-value -> scalar-expr R1116 critical-construct -> critical-stmt block end-critical-stmt R1117 critical-stmt -> [critical-construct-name :] CRITICAL [( [sync-stat-list] )] R1118 end-critical-stmt -> END CRITICAL [critical-construct-name] R1119 do-construct -> do-stmt block end-do R1120 do-stmt -> nonlabel-do-stmt | label-do-stmt R1121 label-do-stmt -> [do-construct-name :] DO label [loop-control] R1122 nonlabel-do-stmt -> [do-construct-name :] DO [loop-control] R1123 loop-control -> [,] do-variable = scalar-int-expr , scalar-int-expr [, scalar-int-expr] | [,] WHILE ( scalar-logical-expr ) | [,] CONCURRENT concurrent-header concurrent-locality R1124 do-variable -> scalar-int-variable-name R1125 concurrent-header -> ( [integer-type-spec ::] concurrent-control-list [, scalar-mask-expr] ) R1126 concurrent-control -> index-name = concurrent-limit : concurrent-limit [: concurrent-step] R1127 concurrent-limit -> scalar-int-expr R1128 concurrent-step -> scalar-int-expr R1129 concurrent-locality -> [locality-spec]... R1130 locality-spec -> LOCAL ( variable-name-list ) | LOCAL_INIT ( variable-name-list ) | SHARED ( variable-name-list ) | DEFAULT ( NONE ) R1131 end-do -> end-do-stmt | continue-stmt R1132 end-do-stmt -> END DO [do-construct-name] R1133 cycle-stmt -> CYCLE [do-construct-name] R1134 if-construct -> if-then-stmt block [else-if-stmt block]... [else-stmt block] end-if-stmt R1135 if-then-stmt -> [if-construct-name :] IF ( scalar-logical-expr ) THEN R1136 else-if-stmt -> ELSE IF ( scalar-logical-expr ) THEN [if-construct-name] R1137 else-stmt -> ELSE [if-construct-name] R1138 end-if-stmt -> END IF [if-construct-name] R1139 if-stmt -> IF ( scalar-logical-expr ) action-stmt R1140 case-construct -> select-case-stmt [case-stmt block]... end-select-stmt R1141 select-case-stmt -> [case-construct-name :] SELECT CASE ( case-expr ) R1142 case-stmt -> CASE case-selector [case-construct-name] R1143 end-select-stmt -> END SELECT [case-construct-name] R1144 case-expr -> scalar-expr R1145 case-selector -> ( case-value-range-list ) | DEFAULT R1146 case-value-range -> case-value | case-value : | : case-value | case-value : case-value R1147 case-value -> scalar-constant-expr R1148 select-rank-construct -> select-rank-stmt [select-rank-case-stmt block]... end-select-rank-stmt R1149 select-rank-stmt -> [select-construct-name :] SELECT RANK ( [associate-name =>] selector ) R1150 select-rank-case-stmt -> RANK ( scalar-int-constant-expr ) [select-construct-name] | RANK ( * ) [select-construct-name] | RANK DEFAULT [select-construct-name] R1151 end-select-rank-stmt -> END SELECT [select-construct-name] R1152 select-type-construct -> select-type-stmt [type-guard-stmt block]... end-select-type-stmt R1153 select-type-stmt -> [select-construct-name :] SELECT TYPE ( [associate-name =>] selector ) R1154 type-guard-stmt -> TYPE IS ( type-spec ) [select-construct-name] | CLASS IS ( derived-type-spec ) [select-construct-name] | CLASS DEFAULT [select-construct-name] R1155 end-select-type-stmt -> END SELECT [select-construct-name] R1156 exit-stmt -> EXIT [construct-name] R1157 goto-stmt -> GO TO label R1158 computed-goto-stmt -> GO TO ( label-list ) [,] scalar-int-expr R1159 continue-stmt -> CONTINUE R1160 stop-stmt -> STOP [stop-code] [, QUIET = scalar-logical-expr] R1161 error-stop-stmt -> ERROR STOP [stop-code] [, QUIET = scalar-logical-expr] R1162 stop-code -> scalar-default-char-expr | scalar-int-expr R1163 fail-image-stmt -> FAIL IMAGE R1164 sync-all-stmt -> SYNC ALL [( [sync-stat-list] )] R1165 sync-stat -> STAT = stat-variable | ERRMSG = errmsg-variable R1166 sync-images-stmt -> SYNC IMAGES ( image-set [, sync-stat-list] ) R1167 image-set -> int-expr | * R1168 sync-memory-stmt -> SYNC MEMORY [( [sync-stat-list] )] R1169 sync-team-stmt -> SYNC TEAM ( team-value [, sync-stat-list] ) R1170 event-post-stmt -> EVENT POST ( event-variable [, sync-stat-list] ) R1171 event-variable -> scalar-variable R1172 event-wait-stmt -> EVENT WAIT ( event-variable [, event-wait-spec-list] ) R1173 event-wait-spec -> until-spec | sync-stat R1174 until-spec -> UNTIL_COUNT = scalar-int-expr R1175 form-team-stmt -> FORM TEAM ( team-number , team-variable [, form-team-spec-list] ) R1176 team-number -> scalar-int-expr R1177 team-variable -> scalar-variable R1178 form-team-spec -> NEW_INDEX = scalar-int-expr | sync-stat R1179 lock-stmt -> LOCK ( lock-variable [, lock-stat-list] ) R1180 lock-stat -> ACQUIRED_LOCK = scalar-logical-variable | sync-stat R1181 unlock-stmt -> UNLOCK ( lock-variable [, sync-stat-list] ) R1182 lock-variable -> scalar-variable R1201 io-unit -> file-unit-number | * | internal-file-variable R1202 file-unit-number -> scalar-int-expr R1203 internal-file-variable -> char-variable R1204 open-stmt -> OPEN ( connect-spec-list ) R1205 connect-spec -> [UNIT =] file-unit-number | ACCESS = scalar-default-char-expr | ACTION = scalar-default-char-expr | ASYNCHRONOUS = scalar-default-char-expr | BLANK = scalar-default-char-expr | DECIMAL = scalar-default-char-expr | DELIM = scalar-default-char-expr | ENCODING = scalar-default-char-expr | ERR = label | FILE = file-name-expr | FORM = scalar-default-char-expr | IOMSG = iomsg-variable | IOSTAT = scalar-int-variable | NEWUNIT = scalar-int-variable | PAD = scalar-default-char-expr | POSITION = scalar-default-char-expr | RECL = scalar-int-expr | ROUND = scalar-default-char-expr | SIGN = scalar-default-char-expr | STATUS = scalar-default-char-expr @ | CARRIAGECONTROL = scalar-default-char-expr | CONVERT = scalar-default-char-expr | DISPOSE = scalar-default-char-expr R1206 file-name-expr -> scalar-default-char-expr R1207 iomsg-variable -> scalar-default-char-variable R1208 close-stmt -> CLOSE ( close-spec-list ) R1209 close-spec -> [UNIT =] file-unit-number | IOSTAT = scalar-int-variable | IOMSG = iomsg-variable | ERR = label | STATUS = scalar-default-char-expr R1210 read-stmt -> READ ( io-control-spec-list ) [input-item-list] | READ format [, input-item-list] R1211 write-stmt -> WRITE ( io-control-spec-list ) [output-item-list] R1212 print-stmt -> PRINT format [, output-item-list] R1213 io-control-spec -> [UNIT =] io-unit | [FMT =] format | [NML =] namelist-group-name | ADVANCE = scalar-default-char-expr | ASYNCHRONOUS = scalar-default-char-constant-expr | BLANK = scalar-default-char-expr | DECIMAL = scalar-default-char-expr | DELIM = scalar-default-char-expr | END = label | EOR = label | ERR = label | ID = id-variable | IOMSG = iomsg-variable | IOSTAT = scalar-int-variable | PAD = scalar-default-char-expr | POS = scalar-int-expr | REC = scalar-int-expr | ROUND = scalar-default-char-expr | SIGN = scalar-default-char-expr | SIZE = scalar-int-variable R1214 id-variable -> scalar-int-variable R1215 format -> default-char-expr | label | * R1216 input-item -> variable | io-implied-do R1217 output-item -> expr | io-implied-do R1218 io-implied-do -> ( io-implied-do-object-list , io-implied-do-control ) R1219 io-implied-do-object -> input-item | output-item R1220 io-implied-do-control -> do-variable = scalar-int-expr , scalar-int-expr [, scalar-int-expr] R1221 dtv-type-spec -> TYPE ( derived-type-spec ) | CLASS ( derived-type-spec ) R1222 wait-stmt -> WAIT ( wait-spec-list ) R1223 wait-spec -> [UNIT =] file-unit-number | END = label | EOR = label | ERR = label | ID = scalar-int-expr | IOMSG = iomsg-variable | IOSTAT = scalar-int-variable R1224 backspace-stmt -> BACKSPACE file-unit-number | BACKSPACE ( position-spec-list ) R1225 endfile-stmt -> ENDFILE file-unit-number | ENDFILE ( position-spec-list ) R1226 rewind-stmt -> REWIND file-unit-number | REWIND ( position-spec-list ) R1227 position-spec -> [UNIT =] file-unit-number | IOMSG = iomsg-variable | IOSTAT = scalar-int-variable | ERR = label R1228 flush-stmt -> FLUSH file-unit-number | FLUSH ( flush-spec-list ) R1229 flush-spec -> [UNIT =] file-unit-number | IOSTAT = scalar-int-variable | IOMSG = iomsg-variable | ERR = label R1230 inquire-stmt -> INQUIRE ( inquire-spec-list ) | INQUIRE ( IOLENGTH = scalar-int-variable ) output-item-list R1231 inquire-spec -> [UNIT =] file-unit-number | FILE = file-name-expr | ACCESS = scalar-default-char-variable | ACTION = scalar-default-char-variable | ASYNCHRONOUS = scalar-default-char-variable | BLANK = scalar-default-char-variable | DECIMAL = scalar-default-char-variable | DELIM = scalar-default-char-variable | ENCODING = scalar-default-char-variable | ERR = label | EXIST = scalar-logical-variable | FORM = scalar-default-char-variable | FORMATTED = scalar-default-char-variable | ID = scalar-int-expr | IOMSG = iomsg-variable | IOSTAT = scalar-int-variable | NAME = scalar-default-char-variable | NAMED = scalar-logical-variable | NEXTREC = scalar-int-variable | NUMBER = scalar-int-variable | OPENED = scalar-logical-variable | PAD = scalar-default-char-variable | PENDING = scalar-logical-variable | POS = scalar-int-variable | POSITION = scalar-default-char-variable | READ = scalar-default-char-variable | READWRITE = scalar-default-char-variable | RECL = scalar-int-variable | ROUND = scalar-default-char-variable | SEQUENTIAL = scalar-default-char-variable | SIGN = scalar-default-char-variable | SIZE = scalar-int-variable | STREAM = scalar-default-char-variable | STATUS = scalar-default-char-variable | WRITE = scalar-default-char-variable @ | CARRIAGECONTROL = scalar-default-char-expr | CONVERT = scalar-default-char-expr | DISPOSE = scalar-default-char-expr R1301 format-stmt -> FORMAT format-specification R1302 format-specification -> ( [format-items] ) | ( [format-items ,] unlimited-format-item ) R1303 format-items -> format-item [[,] format-item]... R1304 format-item -> [r] data-edit-desc | control-edit-desc | char-string-edit-desc | [r] ( format-items ) R1305 unlimited-format-item -> * ( format-items ) R1306 r -> digit-string R1307 data-edit-desc -> I w [. m] | B w [. m] | O w [. m] | Z w [. m] | F w . d | E w . d [E e] | EN w . d [E e] | ES w . d [E e] | EX w . d [E e] | G w [. d [E e]] | L w | A [w] | D w . d | DT [char-literal-constant] [( v-list )] R1308 w -> digit-string R1309 m -> digit-string R1310 d -> digit-string R1311 e -> digit-string R1312 v -> [sign] digit-string R1313 control-edit-desc -> position-edit-desc | [r] / | : | sign-edit-desc | k P | blank-interp-edit-desc | round-edit-desc | decimal-edit-desc | @ $ | \ R1314 k -> [sign] digit-string R1315 position-edit-desc -> T n | TL n | TR n | n X R1316 n -> digit-string R1317 sign-edit-desc -> SS | SP | S R1318 blank-interp-edit-desc -> BN | BZ R1319 round-edit-desc -> RU | RD | RZ | RN | RC | RP R1320 decimal-edit-desc -> DC | DP R1321 char-string-edit-desc -> char-literal-constant R1401 main-program -> [program-stmt] [specification-part] [execution-part] [internal-subprogram-part] end-program-stmt R1402 program-stmt -> PROGRAM program-name R1403 end-program-stmt -> END [PROGRAM [program-name]] R1404 module -> module-stmt [specification-part] [module-subprogram-part] end-module-stmt R1405 module-stmt -> MODULE module-name R1406 end-module-stmt -> END [MODULE [module-name]] R1407 module-subprogram-part -> contains-stmt [module-subprogram]... R1408 module-subprogram -> function-subprogram | subroutine-subprogram | separate-module-subprogram R1409 use-stmt -> USE [[, module-nature] ::] module-name [, rename-list] | USE [[, module-nature] ::] module-name , ONLY : [only-list] R1410 module-nature -> INTRINSIC | NON_INTRINSIC R1411 rename -> local-name => use-name | OPERATOR ( local-defined-operator ) => OPERATOR ( use-defined-operator ) R1412 only -> generic-spec | only-use-name | rename R1413 only-use-name -> use-name R1414 local-defined-operator -> defined-unary-op | defined-binary-op R1415 use-defined-operator -> defined-unary-op | defined-binary-op R1416 submodule -> submodule-stmt [specification-part] [module-subprogram-part] end-submodule-stmt R1417 submodule-stmt -> SUBMODULE ( parent-identifier ) submodule-name R1418 parent-identifier -> ancestor-module-name [: parent-submodule-name] R1419 end-submodule-stmt -> END [SUBMODULE [submodule-name]] R1420 block-data -> block-data-stmt [specification-part] end-block-data-stmt R1421 block-data-stmt -> BLOCK DATA [block-data-name] R1422 end-block-data-stmt -> END [BLOCK DATA [block-data-name]] R1501 interface-block -> interface-stmt [interface-specification]... end-interface-stmt R1502 interface-specification -> interface-body | procedure-stmt R1503 interface-stmt -> INTERFACE [generic-spec] | ABSTRACT INTERFACE R1504 end-interface-stmt -> END INTERFACE [generic-spec] R1505 interface-body -> function-stmt [specification-part] end-function-stmt | subroutine-stmt [specification-part] end-subroutine-stmt R1506 procedure-stmt -> [MODULE] PROCEDURE [::] specific-procedure-list R1507 specific-procedure -> procedure-name R1508 generic-spec -> generic-name | OPERATOR ( defined-operator ) | ASSIGNMENT ( = ) | defined-io-generic-spec R1509 defined-io-generic-spec -> READ ( FORMATTED ) | READ ( UNFORMATTED ) | WRITE ( FORMATTED ) | WRITE ( UNFORMATTED ) R1510 generic-stmt -> GENERIC [, access-spec] :: generic-spec => specific-procedure-list R1511 external-stmt -> EXTERNAL [::] external-name-list R1512 procedure-declaration-stmt -> PROCEDURE ( [proc-interface] ) [[, proc-attr-spec]... ::] proc-decl-list R1513 proc-interface -> interface-name | declaration-type-spec R1514 proc-attr-spec -> access-spec | proc-language-binding-spec | INTENT ( intent-spec ) | OPTIONAL | POINTER | PROTECTED | SAVE R1515 proc-decl -> procedure-entity-name [=> proc-pointer-init] R1516 interface-name -> name R1517 proc-pointer-init -> null-init | initial-proc-target R1518 initial-proc-target -> procedure-name R1519 intrinsic-stmt -> INTRINSIC [::] intrinsic-procedure-name-list R1520 function-reference -> procedure-designator ( [actual-arg-spec-list] ) R1521 call-stmt -> CALL procedure-designator [( [actual-arg-spec-list] )] R1522 procedure-designator -> procedure-name | proc-component-ref | data-ref % binding-name R1523 actual-arg-spec -> [keyword =] actual-arg R1524 actual-arg -> expr | variable | procedure-name | proc-component-ref | alt-return-spec R1525 alt-return-spec -> * label R1526 prefix -> prefix-spec [prefix-spec]... R1527 prefix-spec -> declaration-type-spec | ELEMENTAL | IMPURE | MODULE | NON_RECURSIVE | PURE | RECURSIVE R1528 proc-language-binding-spec -> language-binding-spec R1529 function-subprogram -> function-stmt [specification-part] [execution-part] [internal-subprogram-part] end-function-stmt R1530 function-stmt -> [prefix] FUNCTION function-name ( [dummy-arg-name-list] ) [suffix] R1531 dummy-arg-name -> name R1532 suffix -> proc-language-binding-spec [RESULT ( result-name )] | RESULT ( result-name ) [proc-language-binding-spec] R1533 end-function-stmt -> END [FUNCTION [function-name]] R1534 subroutine-subprogram -> subroutine-stmt [specification-part] [execution-part] [internal-subprogram-part] end-subroutine-stmt R1535 subroutine-stmt -> [prefix] SUBROUTINE subroutine-name [( [dummy-arg-list] ) [proc-language-binding-spec]] R1536 dummy-arg -> dummy-arg-name | * R1537 end-subroutine-stmt -> END [SUBROUTINE [subroutine-name]] R1538 separate-module-subprogram -> mp-subprogram-stmt [specification-part] [execution-part] [internal-subprogram-part] end-mp-subprogram-stmt R1539 mp-subprogram-stmt -> MODULE PROCEDURE procedure-name R1540 end-mp-subprogram-stmt -> END [PROCEDURE [procedure-name]] R1541 entry-stmt -> ENTRY entry-name [( [dummy-arg-list] ) [suffix]] R1542 return-stmt -> RETURN [scalar-int-expr] R1543 contains-stmt -> CONTAINS R1544 stmt-function-stmt -> function-name ( [dummy-arg-name-list] ) = scalar-expr