Essential Lahey Fortran 90 Syntax
The following changes have been made to the Appendix D text:
Lines have been reformatted so as to have at most 75 characters
plus end of line.
Where needed text was realigned. In rearranging the text, page
numbers and printed line-numbers agree with the printed version
of the standard, not the electronic version. Sometimes, the blank
lines within consecutively numbered lines were collected at the
end of the block.
Blank lines were not numbered in Appendix D and are not here. In
this document, when a blank line is numbered, it means that Appendix
D text was deleted because Essential LF90 does not allow the syntax or that a
constraint is not applicable.
A line without a line number but with text indicates an Essential LF90 re-
quirement that was optional in the standard, e.g., IMPLICIT NONE.
Unneeded syntax rules (see 507 which could be folded into 506) were
not eliminated in order to preserve a higher isomorphism to the text
in the standard.
The constraint at Page 312 appears in the electronic version, not
the printed version.
To reduce the length of long lines, the following substitutions were made
within the syntax rules:
literal was replaced with lit
exponent was replaced with xpn
initialization was replaced with initz
In Essential LF90, the concept of BOZ values (but not the Fortran 90 syntax) exists
in input/output but, because the DATA statement has been removed, there is
no place in the source language BOZ constants may appear.
Please report any errors to:
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3 As did Appendix D, these syntax rules contains two parts. The
first part is an extraction of all syntax rules and constraints
in the order in which they appear in the standard. The second
part is a cross reference with an entry for each terminal symbol
and each nonterminal symbol in the syntax rules. The symbols are
sorted alphabetically within three categories: nonterminal symbols
that are defined, nonterminal symbols that are not defined, and
terminal symbols.
8 Except for those ending with -name, the only undefined nonterminal
symbols are letter, digit, special-character, and rep-char. As
described in 1.5.2, the following rules are assumed. The letters
"xyz" stand for any legal syntactic class phrase:
11 xyz-list is xyz [ , xyz ] ...
12 xyz-name is name
13 scalar-xyz is xyz
14 Constraint: scalar-xyz must be scalar.
15 D.1 Syntax Rules and Constraints. Each of the following sections
contains the syntax rules and constraints from one section of the
standard; that is, Section D.1.1 contains the rules and constraints
from Section 1 of the standard, D.1.2 contains those from Section 2,
and so on. Note that Sections 1, 13, and 14 contain no syntax rules.
19 D.1.1 Overview
20 D.1.2 Fortran Terms and Concepts.
21 R201 executable-program is program-unit
22 [ program-unit ] ...
23 R202 program-unit is main-program
24 or external-subprogram
25 or module
26
27 R1101 main-program is program-stmt
28 [ specification-part ]
29 [ execution-part ]
30 [ internal-subprogram-part ]
31 end-program-stmt
32 R203 external-subprogram is function-subprogram
33 or subroutine-subprogram
34 R1215 function-subprogram is function-stmt
35 [ specification-part ]
36 [ execution-part ]
37 [ internal-subprogram-part ]
38 end-function-stmt
Page 303
1 R1219 subroutine-subprogram is subroutine-stmt
2 [ specification-part ]
3 [ execution-part ]
4 [ internal-subprogram-part ]
5 end-subroutine-stmt
6 R1104 module is module-stmt
7 [ specification-part ]
8 [ module-subprogram-part ]
9 end-module-stmt
10:12
13 R204 specification-part is [ use-stmt ] ...
14 implicit-part
15 [ declaration-construct ] ...
16 R205 implicit-part is IMPLICIT NONE
[ implicit-part-stmt ] ...
18 R206 implicit-part-stmt is parameter-stmt
19 or format-stmt
20:21
22 R207 declaration-construct is derived-type-def
23 or interface-block
24 or type-declaration-stmt
25 or specification-stmt
26 or parameter-stmt
27 or format-stmt
28:29
30 R208 execution-part is executable-construct
31 [ execution-part-construct ] ...
32 R209 execution-part-construct is executable-construct
33 or format-stmt
34:35
36 R210 internal-subprogram-part is contains-stmt
37 internal-subprogram
38 [ internal-subprogram ] ...
39 R211 internal-subprogram is function-subprogram
40 or subroutine-subprogram
41 R212 module-subprogram-part is contains-stmt
42 module-subprogram
43 [ module-subprogram ] ...
44 R213 module-subprogram is function-subprogram
45 or subroutine-subprogram
46 R214 specification-stmt is access-stmt
47
48
Page 304
1: 6
7 or namelist-stmt
8 or optional-stmt
9:11
12 R215 executable-construct is action-stmt
13 or case-construct
14 or do-construct
15 or if-construct
16 or where-construct
17 R216 action-stmt is allocate-stmt
18 or assignment-stmt
19 or backspace-stmt
20 or call-stmt
21 or close-stmt
22
23
24 or cycle-stmt
25 or deallocate-stmt
26 or endfile-stmt
27 or end-function-stmt
28 or end-program-stmt
29 or end-subroutine-stmt
30 or exit-stmt
31 or goto-stmt
32 or if-stmt
33 or inquire-stmt
34 or nullify-stmt
35 or open-stmt
36 or pointer-assignment-stmt
37
38 or read-stmt
39 or return-stmt
40 or rewind-stmt
41 or stop-stmt
42
43 or write-stmt
44:47
48 Constraint: An execution-part-construct must not contain an
end-function-stmt, end-program-stmt, or
end-subroutine-stmt.
Page 305
1 D.1.3 Characters, Lexical Tokens, and Source Form.
2 R301 character is alphanumeric-character
3 or special-character
4 R302 alphanumeric-character is letter
5 or digit
6 or underscore
7 R303 underscore is _
8 R304 name is letter [ alphanumeric-character ] ...
9 Constraint: The maximum length of a name is 31 characters.
10 R305 constant is literal-constant
11 or named-constant
12 R306 literal-constant is int-lit-constant
13 or real-lit-constant
14 or complex-lit-constant
15 or logical-lit-constant
16 or char-lit-constant
17
18 R307 named-constant is name
19 R308 int-constant is constant
20 Constraint: int-constant must be of type integer.
21 R309 char-constant is constant
22 Constraint: char-constant must be of type character.
23 R310 intrinsic-operator is power-op
24 or mult-op
25 or add-op
26 or concat-op
27 or rel-op
28 or not-op
29 or and-op
30 or or-op
31 or equiv-op
32 R708 power-op is **
33 R709 mult-op is *
34 or /
35 R710 add-op is +
36 or -
37 R712 concat-op is //
38 R714 rel-op is .EQ.
39 or .NE.
40 or .LT.
41 or .LE.
42 or .GT.
43 or .GE.
44 or ==
45 or /=
Page 306
1 or <
2 or <=
3 or >
4 or >=
5 R719 not-op is .NOT.
6 R720 and-op is .AND.
7 R721 or-op is .OR.
8 R722 equiv-op is .EQV.
9 or .NEQV.
10 R311 defined-operator is defined-unary-op
11 or defined-binary-op
12 or extended-intrinsic-op
13 R704 defined-unary-op is . letter [ letter ] ... .
14 R724 defined-binary-op is . letter [ letter ] ... .
15 R312 extended-intrinsic-op is intrinsic-operator
16 Constraint: A defined-unary-op and a defined-binary-op must not
contain more than 31 letters and must not be the same
as any intrinsic-operator or logical-lit-constant.
18 R313 label is digit [ digit [ digit [ digit [
digit ] ] ] ]
19 Constraint: The first digit in a label must be nonzero.
20 D.1.4 Intrinsic and Derived Data Types.
21 R401 signed-digit-string is [ sign ] digit-string
22 R402 digit-string is digit [ digit ] ...
23 R403 signed-int-lit-constant is [ sign ] int-lit-constant
24 R404 int-lit-constant is digit-string [ _ kind-param ]
25 R405 kind-param is digit-string
26 or scalar-int-constant-name
27 R406 sign is +
28 or -
29 Constraint: The value of kind-param must be nonnegative.
30 Constraint: The value of kind-param must specify a representation
method that exists on the processor.
31 R407 boz-lit-constant is binary-constant
32 or octal-constant
33 or hex-constant
34 Constraint: A boz-lit-constant may only appear as an input or out-
put value under the control of each's FORMAT specifier.
35 R408 binary-constant is digit [ digit ] ...
36
37 Constraint: digit must have one of the values 0 or 1.
38 R409 octal-constant is digit [ digit ] ...
39
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1 Constraint: digit must have one of the values 0 through 7.
2 R410 hex-constant is hex-digit [ hex-digit ] ...
3
4 R411 hex-digit is digit
5 or A
6 or B
7 or C
8 or D
9 or E
10 or F
11 R412 signed-real-lit-constant is [ sign ] real-lit-constant
12 R413 real-lit-constant is significand [ xpn-letter xpn ]
[ _ kind-param ]
13 or digit-string xpn-letter xpn
[ _ kind-param ]
14 R414 significand is digit-string . [ digit-string ]
15 or . digit-string
16 R415 xpn-letter is E
17
18 R416 xpn is signed-digit-string
19 Constraint: If both kind-param and xpn-letter are present,
xpn-letter must be E.
20 Constraint: The value of kind-param must specify an approximation
method that exists on the processor.
22 R417 complex-lit-constant is ( real-part , imag-part )
23 R418 real-part is signed-int-lit-constant
24 or signed-real-lit-constant
25 R419 imag-part is signed-int-lit-constant
26 or signed-real-lit-constant
27 R420 char-lit-constant is [ kind-param _ ] ' [ rep-char ]
... '
28 or [ kind-param _ ] " [ rep-char ]
... "
29 Constraint: The value of kind-param must specify a representation
method that exists on the processor.
30 R421 logical-lit-constant is .TRUE. [ _ kind-param ]
31 or .FALSE. [ _ kind-param ]
32 Constraint: The value of kind-param must specify a representation
method that exists on the processor.
33 R422 derived-type-def is derived-type-stmt
34 [ private-sequence-stmt ] ...
35 component-def-stmt
36 [ component-def-stmt ] ...
37 end-type-stmt
38 R423 private-sequence-stmt is PRIVATE
39 or SEQUENCE
40 R424 derived-type-stmt is TYPE [ , access-spec ] ::
type-name
41 Constraint: The same private-sequence-stmt must not appear more
than once in a given derived-type-def.
43 Constraint: If SEQUENCE is present, all derived types specified
in component definitions must be sequence types.
Page 308
1 Constraint: An access-spec (5.1.2.2) or a PRIVATE statement within
the definition is permitted only if the type definition
is within the specification part of a module.
3 Constraint: If a component of a derived type is of a type declared
to be private, either the derived type definition must
contain the PRIVATE statement or the derived type must
be private.
5 Constraint: A derived type type-name must not be the same as the
name of any intrinsic type nor the same as any other
accessible derived type-name.
7 R425 end-type-stmt is END TYPE type-name
8 Constraint: The type-name must be the same as that in the
corresponding derived-type-stmt.
10 R426 component-def-stmt is type-spec [ [ , component-attr-
spec-list ] :: ]
component-decl-list
12 R427 component-attr-spec is POINTER
13 or DIMENSION ( component-array-spec )
14 Constraint: No component-attr-spec may appear more than once in a
given component-def-stmt.
15 Constraint: If the POINTER attribute is not specified for a
component, a type-spec in the component-def-stmt must
specify an intrinsic type or a previously defined
derived type.
17 Constraint: If the POINTER attribute is specified for a component,
a type-spec in the component-def-stmt must specify an
intrinsic type or any accessible derived type includ-
ing the type being defined.
20 R428 component-array-spec is explicit-shape-spec-list
21 or deferred-shape-spec-list
22 R429 component-decl is component-name [
( component-array-spec ) ]
[ * char-length ]
24 Constraint: If the POINTER attribute is not specified, each compon-
ent-array-spec must be an explicit-shape-spec-list.
26 Constraint: If the POINTER attribute is specified, each component-
-array-spec must be a deferred-shape-spec-list.
28 Constraint: The * char-length option is permitted only to the
right of the :: when the type specifier is character
and not when the length has been declared to the left
of the double colon.
Constraint: When component-attr-spec is DIMENSION, then component-
array-spec must not appear to the left of the double
colon.
29 Constraint: A char-length in a component-decl must be a constant
specification expression (7.1.6.2).
30 Constraint: Each bound in the explicit-shape-spec (R428) must be a
constant specification expression (7.1.6.2).
32 R430 structure-constructor is type-name ( expr-list )
33 R431 array-constructor is (/ ac-value-list /)
34 R432 ac-value is expr
35 or ac-implied-do
36 R433 ac-implied-do is ( ac-value-list ,
ac-implied-do-control )
37 R434 ac-implied-do-control is ac-do-variable =
scalar-int-expr ,
38 scalar-int-expr [ ,
scalar-int-expr ]
39 R435 ac-do-variable is scalar-int-variable
40 Constraint: ac-do-variable must be a named variable.
41 Constraint: Each ac-value expression in the sequence must have the
same type and type parameters.
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1 D.1.5 Data Object Declarations and Specifications.
2 R501 type-declaration-stmt is type-spec [ , attr-spec ] ...
:: entity-decl-list
3 R502 type-spec is INTEGER [ kind-selector ]
4 or REAL [ kind-selector ]
5
6 or COMPLEX [ kind-selector ]
7 or CHARACTER [ char-selector ]
8 or LOGICAL [ kind-selector ]
9 or TYPE ( type-name )
10 R503 attr-spec is PARAMETER
11 or access-spec
12 or ALLOCATABLE
13 or DIMENSION ( array-spec )
14
15 or INTENT ( intent-spec )
16
17 or OPTIONAL
18 or POINTER
19 or SAVE
20 or TARGET
21 R504 entity-decl is object-name [ ( array-spec ) ]
[* char-length ] [ =
initialization-expr ]
or function-name [ ( array-
spec ) ]
[ * char-length ]
24 R505 kind-selector is ( [ KIND = ] scalar-int-
initialization-expr )
25 Constraint: The same attr-spec must not appear more than once
in a given type-declaration-stmt.
26 Constraint: The function-name must be the name of an external
function, an intrinsic function, or a function dummy
procedure.
28 Constraint: The = initialization-expr must appear if the statement
contains a PARAMETER attribute (5.1.2.1).
30 Constraint: If = initialization-expr appears, a double colon
separator must appear before the entity-decl-list.
32 Constraint: The = initialization-expr must not appear if
object-name is a dummy argument, a function
result, an allocatable array, a pointer, an external
name, or an automatic object.
36 Constraint: The * char-length option is permitted only to the
right of the :: when the type specifier is character
and not when the length has been declared to the
left of the double colon.
37 Constraint: The ALLOCATABLE attribute may be used only when
declaring an array that is not a dummy argument
or a function result.
39 Constraint: An array declared with a POINTER or an ALLOCATABLE
attribute must be specified with an array-spec that
is a deferred-shape-spec-list (5.1.2.4.3).
41 Constraint: An array-spec for a function-name that does not have the
pointer attribute must be an explicit-shape-spec-list.
43 Constraint: An array-spec for a function-name that does have the
pointer attribute must be a deferred-shape-spec-list.
45 Constraint: If the POINTER attribute is specified, the INTENT
attribute must not be specified.
Page 310
1 Constraint: If the TARGET attribute is specified, the PARAMETER
attribute must not be specified.
3 Constraint: The PARAMETER attribute must not be specified for dummy
arguments, pointers, or functions.
5 Constraint: The INTENT and OPTIONAL attributes may be specified only
for dummy arguments.
6 Constraint: An entity must not have the PUBLIC attribute if its type
has the PRIVATE attribute.
7 Constraint: The SAVE attribute must not be specified for an object
that is a dummy argument, a procedure, a function
result, or an automatic data object.
9:11
12 Constraint: An array must not have both the ALLOCATABLE attribute
and the POINTER attribute.
13 Constraint: An entity must not be given explicitly any attribute
more than once in a scoping unit.
14 Constraint: The value specified in a kind-selector must be
nonnegative.
16 R506 char-selector is length-selector
17 or ( [ LEN= ] type-param-value ,
18 [ KIND= ] scalar-int-
initialization-expr )
or ( KIND= scalar-int-
initialization-expr
[ , LEN= type-param-value ] )
23 R507 length-selector is ( [ LEN = ] type-param-value )
24
25 R508 char-length is ( type-param-value )
26 or scalar-int-lit-constant
27:33
34 R509 type-param-value is specification-expr
35 or *
36 Constraint: A function name must not be declared with an asterisk
char-length if the function is an internal or module
function, array-valued, pointer-valued, or recursive.
38 R510 access-spec is PUBLIC
39 or PRIVATE
40 Constraint: An access-spec attribute may appear only
in the specification-part of a module.
41 R511 intent-spec is IN
42 or OUT
43 or IN OUT
Page 311
Constraint: The INTENT attribute may appear only in the specifi-
cation-part of a subprogram or an interface body
(12.3.2.1).
1 Constraint: The INTENT attribute must not be specified for a dummy
argument that is a dummy procedure or a dummy pointer.
3 R512 array-spec is explicit-shape-spec-list
4 or assumed-shape-spec-list
5 or deferred-shape-spec-list
6
7 Constraint: The maximum rank is seven.
Constraint: assumed-shape-spec-list must be used for dummy argument
arrays.
8 R513 explicit-shape-spec is [ lower-bound : ] upper-bound
9 R514 lower-bound is specification-expr
10 R515 upper-bound is specification-expr
11 Constraint: An explicit-shape array whose bounds depend on the
values of nonconstant expressions must be a dummy
argument, a function result, or an automatic array
of a procedure.
13 R516 assumed-shape-spec is [ lower-bound ] :
14 R517 deferred-shape-spec is :
15:21
22 R520 optional-stmt is OPTIONAL :: dummy-arg-name-list
23 Constraint: An optional-stmt may occur only in the scoping unit of
a subprogram or an interface body. dummy-arg-name-list
must be external subroutines.
24 R521 access-stmt is access-spec [ [ :: ] access-id
-list ]
25 R522 access-id is use-name
26 or generic-spec
27 Constraint: An access-stmt may appear only in the scoping unit
of a module. Only one accessibility statement with
an omitted access-id-list is permitted in the scoping
unit of a module.
29 Constraint: Each use-name must be the name of a named variable,
nonintrinsic procedure, generic procedure, derived
type, named constant, or namelist group.
31 Constraint: A module procedure that has a dummy argument or function
result of a type that has PRIVATE accessibility must
have PRIVATE accessibility and must not have a generic
identifier that has PUBLIC accessibility.
34:42
Page 312
1:42
Page 313
1:23
24 R543 namelist-stmt is NAMELIST /namelist-group-name/
25 namelist-group-object-list
26 [ [ , ] /namelist-group-name/
27 namelist-group-object-list ]
...
28 R544 namelist-group-object is variable-name
29 Constraint: A namelist-group-object must not be an array dummy argu-
ment with nonconstant bounds, a variable with assumed
character length, an automatic object, a pointer, of a
type that has an ultimate component that is a pointer,
an allocatable array, or a subobject of any of the
preceding objects.
32 Constraint: If a namelist-group-name has the PUBLIC attribute,
no item in the namelist-group-object-list may have
the PRIVATE attribute.
34:45
Page 314
1:23
24 D.1.6 Use of Data Objects.
25 R601 variable is scalar-variable-name
26 or array-variable-name
27 or subobject
28 Constraint: array-variable-name must be the name of a data
object that is an array.
29 Constraint: array-variable-name must not have the PARAMETER
attribute.
30 Constraint: scalar-variable-name must not have the PARAMETER
attribute.
31 Constraint: subobject must not be a subobject designator (e.g.,
a substring) whose parent is a constant.
33 R602 subobject is array-element
34 or array-section
35 or structure-component
36 or substring
37 R603 logical-variable is variable
38 Constraint: logical-variable must be of type logical.
39 R604 default-logical-variable is variable
40 Constraint: default-logical-variable must be of type default
logical.
41 R605 char-variable is variable
Page 315
1 Constraint: char-variable must be of type character.
2 R606 default-char-variable is variable
3 Constraint: default-char-variable must be of type default character.
4 R607 int-variable is variable
5 Constraint: int-variable must be of type integer.
6 R608 default-int-variable is variable
7 Constraint: default-int-variable must be of type default integer.
8 R609 substring is parent-string (
substring-range )
9 R610 parent-string is scalar-variable-name
10 or array-element
11 or scalar-structure-component
12 or scalar-constant
13 R611 substring-range is [ scalar-int-expr ] :
[ scalar-int-expr ]
14 Constraint: parent-string must be of type character.
15 R612 data-ref is part-ref [ % part-ref ] ...
16 R613 part-ref is part-name [ ( section-
subscript-list ) ]
17 Constraint: In a data-ref, each part-name except the rightmost must
be of derived type.
18 Constraint: In a data-ref, each part-name except the leftmost must
be the name of a component of the derived type defin-
ition of the type of the preceding part-name.
20 Constraint: In a part-ref containing a section-subscript-list,
the number of section-subscripts must equal the rank
of part-name.
22 Constraint: In a data-ref, there must not be more than one part-ref
with nonzero rank.
24 R614 structure-component is data-ref
25 Constraint: In a structure-component, there must be more than one
one part-ref and the rightmost part-ref must be of the
form part-name.
27 R615 array-element is data-ref
28 Constraint: In an array-element, every part-ref must have rank zero
and at least one part-ref must contain a subscript-list.
30 R616 array-section is data-ref [ ( substring-range ) ]
31 Constraint: In an array-section, one part-ref must have a section-
subscript-list and have nonzero rank.
33 Constraint: In an array-section with a substring-range, the right-
most part-name must be of type character.
35 R617 subscript is scalar-int-expr
36 R618 section-subscript is subscript
37 or subscript-triplet
38 or vector-subscript
39 R619 subscript-triplet is [ subscript ] : [ subscript ]
[ : stride ]
40 R620 stride is scalar-int-expr
Page 316
1 R621 vector-subscript is int-expr
2 Constraint: A vector-subscript must be an integer array expression
of rank one.
3:4
5 R622 allocate-stmt is ALLOCATE ( allocation-list
6 [ , STAT= stat-variable ] )
7 R623 stat-variable is scalar-int-variable
8 R624 allocation is allocate-object [ ( explicit-
shape-spec-list ) ]
9 R625 allocate-object is variable-name
10 or structure-component
11 R626 allocate-shape-spec is [ allocate-lower-bound : ]
allocate-upper-bound
12 R627 allocate-lower-bound is scalar-int-exp
13 R628 allocate-upper-bound is scalar-int-exp
Constraint: Each allocate-object must be a pointer or an allocatable
array.
Constraint: The number of allocate-shpae-specs in an allocate-
shape-spec-list must be the same as the rank of the
pointer or allocatable array.
15 R629 nullify-stmt is NULLIFY ( pointer-object-list )
16 R630 pointer-object is variable-name
17 or structure-component
20 Constraint: Each pointer-object must have the POINTER attribute.
21 R631 deallocate-stmt is DEALLOCATE ( allocate-object-
list
22 [ , STAT = stat-variable ] )
23 Constraint: Each allocate-object must be a pointer or an allocatable
array.
24 D.1.7 Expressions and Assignment.
34 R701 primary is constant
35 or constant-subobject
36 or variable
37 or array-constructor
38 or structure-constructor
39 or function-reference
40 or ( expr )
41 R702 constant-subobject is subobject
42 Constraint: subobject must be a subobject designator whose parent
is a constant.
43 Constraint: A variable that is a primary must not be an assumed-
size array.
1 R703 level-1-expr is [ defined-unary-op ] primary
2 R704 defined-unary-op is . letter [ letter ] ... .
3 Constraint: A defined-unary-op must not contain more than 31 letters
and must not be the same as any intrinsic-operator or
logical-lit-constant.
5 R705 mult-operand is level-1-expr [
power-op mult-operand ]
40 R706 add-operand is [ add-operand mult-op ]
mult-operand
Page 317
1 R707 level-2-expr is [ [ level-2-expr ] add-op ]
add-operand
2 R708 power-op is **
3 R709 mult-op is *
4 or /
5 R710 add-op is +
6 or -
7 R711 level-3-expr is [ level-3-expr concat-op ]
level-2-expr
8 R712 concat-op is //
9 R713 level-4-expr is [ level-3-expr rel-op ]
level-3-expr
10 R714 rel-op is .EQ.
11 or .NE.
12 or .LT.
13 or .LE.
14 or .GT.
15 or .GE.
16 or ==
17 or /=
18 or <
19 or <=
20 or >
21 or >=
22 R715 and-operand is [ not-op ] level-4-expr
23 R716 or-operand is [ or-operand and-op ]
and-operand
24 R717 equiv-operand is [ equiv-operand or-op ]
or-operand
25 R718 level-5-expr is [ level-5-expr equiv-op ]
equiv-operand
26 R719 not-op is .NOT.
27 R720 and-op is .AND.
28 R721 or-op is .OR.
29 R722 equiv-op is .EQV.
30 or .NEQV.
31 R723 expr is [ expr defined-binary-op ]
level-5-expr
32 R724 defined-binary-op is . letter [ letter ] ... .
33 Constraint: A defined-binary-op must not contain more than 31
letters and must not be the same as any intrinsic-
operator or logical-lit-constant.
35 R725 logical-expr is expr
36 Constraint: logical-expr must be type logical.
37 R726 char-expr is expr
38 Constraint: char-expr must be type character.
39 R727 default-char-expr is expr
40 Constraint: default-char-expr must be of type default character.
41 R728 int-expr is expr
Page 318
1 Constraint: int-expr must be type integer.
2 R729 numeric-expr is expr
3 Constraint: numeric-expr must be of type integer, real or complex.
4 R730 initz-expr is expr
5 R731 char-initz-expr is char-expr
6 R732 int-initz-expr is int-expr
7 R733 logical-initz-expr is logical-expr
12 R734 specification-expr is scalar-int-expr
13 Constraint: The scalar-int-expr must be a restricted expression.
14 R735 assignment-stmt is variable = expr
15
16 R736 pointer-assignment-stmt is pointer-object => target
17 R737 target is variable
18 or expr
19 Constraint: The pointer-object must have the POINTER attribute.
20 Constraint: The variable must have the TARGET attribute or be a
subobject of an object with the TARGET attribute, or
it must have the POINTER attribute or be a subobject,
other than a structure component of an object with
the POINTER attribute.
23 Constraint: The target must be of the same type, type parameters,
and rank as the pointer.
24 Constraint: The target must not be an array section with a vector
subscript.
25 Constraint: The expr must deliver a pointer result.
26
27 R739 where-construct is where-construct-stmt
28 [ assignment-stmt ] ...
29 [ elsewhere-stmt
30 [ assignment-stmt ] ... ]
31 end-where-stmt
32 R740 where-construct-stmt is WHERE ( mask-expr )
33 R741 mask-expr is logical-expr
34 R742 elsewhere-stmt is ELSEWHERE
35 R743 end-where-stmt is END WHERE
36 Constraint: In each assignment-stmt, the mask-expr and the variable
being defined must be arrays of the same shape.
38 Constraint: The assignment-stmt must not be a defined assignment.
Page 319
1 D.1.8 Execution Control.
2 R801 block is [ execution-part-construct ] ...
3 R802 if-construct is if-then-stmt
4 block
5 [ else-if-stmt
6 block ] ...
7 [ else-stmt
8 block ]
9 end-if-stmt
10 R803 if-then-stmt is [ if-construct-name : ] IF (
scalar-logical-expr ) THEN
11 R804 else-if-stmt is ELSE IF ( scalar-logical-expr
) THEN [ if-construct-name ]
12 R805 else-stmt is ELSE [ if-construct-name ]
13 R806 end-if-stmt is END IF [ if-construct-name ]
14 Constraint: If the if-then-stmt of an if-construct is identified by
an if-construct-name, the corresponding end-if-stmt must
specify the same if-construct-name. If the if-then-stmt
of an if-construct is not identified by an if-construct-
name, the corresponding end-if-stmt must not specify an
if-construct-name. If an else-if-stmt or else-stmt is
identified by an if-construct-name, the corresponding
if-then-stmt must specify the same if-construct-name.
19 R807 if-stmt is IF ( scalar-logical-expr )
action-stmt
20 Constraint: The action-stmt in the if-stmt must not be an if-stmt,
end-program-stmt, end-function-stmt, or end-subroutine-
stmt.
22 R808 case-construct is select-case-stmt
23 [ case-stmt
24 block ] ...
25 end-select-stmt
26 R809 select-case-stmt is [ case-construct-name : ]
SELECT CASE ( case-expr )
27 R810 case-stmt is CASE case-selector [case-
construct-name]
28 R811 end-select-stmt is END SELECT [ case-construct-
name ]
29 Constraint: If the select-case-stmt of a case-construct is
identified by a case-construct-name, the corresponding
end-select-stmt must specify the same case-construct-
name. If the select-case-stmt of a case-construct is
not identified by a case-construct-name, the correspond-
ing end-select-stmt must not specify a case-construct-
name. If a case-stmt is identified by a case-construct-
name, the corresponding select-case-stmt must specify
the same case-construct-name.
35 R812 case-expr is scalar-int-expr
36 or scalar-char-expr
37
38 R813 case-selector is ( case-value-range-list )
39 or DEFAULT
40 Constraint: No more than one of the selectors of one of the CASE
statements may be DEFAULT.
Constraint: The DEFAULT selector must be either the first or last
selector.
41 R814 case-value-range is case-value
42 or case-value :
43 or : case-value
44 or case-value : case-value
Page 320
1 R815 case-value is scalar-int-initz-expr
2 or scalar-char-initz-expr
3 or scalar-logical-initz-expr
4 Constraint: For a given case-construct, each case-value must be of
the same type as case-expr. For character type, length
differences are allowed, but the kind type parameters
must be the same.
7
8 Constraint: For a given case-construct, the case-value-ranges must
not overlap; that is, there must be no possible value
of the case-expr that matches more than one case-value-
range.
10 R816 do-construct is block-do-construct
11
12 R817 block-do-construct is do-stmt
13 do-block
14 end-do
15 R818 do-stmt is nonlabel-do-stmt
16:17
18 R820 nonlabel-do-stmt is [ do-construct-name : ] DO [ loop-control ]
19 R821 loop-control is do-variable = scalar-numeric-
expr , scalar-numeric-expr
[ , scalar-numeric-expr ]
or WHILE ( scalar-logical-expr )
22 R822 do-variable is scalar-variable
23 Constraint: The do-variable must be a named scalar variable of type
integer.
25 Constraint: Each scalar-numeric-expr in loop-control must be of
type integer.
27 R823 do-block is block
28 R824 end-do is end-do-stmt
29
30 R825 end-do-stmt is END DO [ do-construct-name ]
31 Constraint: If the do-stmt of a block-do-construct is identified by
a do-construct-name, the corresponding end-do must be an
end-do-stmt specifying the same do-construct-name. If
the do-stmt of a block-do-construct does not so specify
a do-construct-name, the corresponding end-do must not
specify a do-construct-name.
35:43
Page 321
1:19
20 R834 cycle-stmt is CYCLE [ do-construct-name ]
21 Constraint: If a cycle-stmt refers to a do-construct-name, it must
be within the range of that do-construct; otherwise, it
must be within the range of at least one do-construct.
23 R835 exit-stmt is EXIT [ do-construct-name ]
24 Constraint: If an exit-stmt refers to a do-construct-name, it must
be within the range of that do-construct; otherwise, it
must be within the range of at least one do-construct.
26 R836 goto-stmt is GO TO label
27 Constraint: The label must be the statement label of a branch target
statement that appears in the same scoping unit as the
goto-stmt.
28:42
Page 322
1:2
3 R842 stop-stmt is STOP [ stop-code ]
4 R843 stop-code is scalar-char-constant
5 or digit [ digit [ digit [ digit [
digit ] ] ] ]
6 Constraint: scalar-char-constant must be of type default character.
7
8 D.1.9 Input/Output Statements.
9 R901 io-unit is external-file-unit
10
11 or internal-file-unit
12 R902 external-file-unit is scalar-int-expr
13 R903 internal-file-unit is default-char-variable
14 Constraint: The char-variable must not be an array section
with a vector subscript.
15 R904 open-stmt is OPEN ( connect-spec-list )
16 R905 connect-spec is [ UNIT= ] external-file-unit
17 or IOSTAT= scalar-default-int-variable
18 or ERR= label
19 or FILE= file-name-expr
20 or STATUS= scalar-default-char-expr
21 or ACCESS= scalar-default-char-expr
22 or FORM= scalar-default-char-expr
23 or RECL= scalar-int-expr
24
25 or POSITION= scalar-default-char-expr
26 or ACTION= scalar-default-char-expr
27 or DELIM= scalar-default-char-expr
28 or PAD= scalar-default-char-expr
29 R906 file-name-expr is scalar-default-char-expr
30 Constraint: If the optional characters UNIT= are omitted from the
unit specifier, the unit specifier must be the first
item in the connect-spec-list.
32 Constraint: Each specifier must not appear more than once in a given
open-stmt; an external-file-unit must be specified.
34 Constraint: The label used in the ERR= specifier must be the
statement label of a branch target statement that
appears in the same scoping unit as the OPEN statement.
Constraint: THE POSITION= specifier is required in an OPEN statement.
36 R907 close-stmt is CLOSE ( close-spec-list )
37 R908 close-spec is [ UNIT= ] external-file-unit
38 or IOSTAT= scalar-default-int-variable
39 or ERR= label
40 or STATUS= scalar-default-char-expr
41 Constraint: If the optional characters UNIT= are omitted from the
unit specifier, the unit specifier must be the first
item in the close-spec-list.
Page 323
1 Constraint: Each specifier must not appear more than once in a given
close-stmt; an external-file-unit must be specified.
38 Constraint: The label used in the ERR= specifier must be the statement label of a branch target
39 statement that appears in the same scoping unit as the CLOSE statement.
40 R909 read-stmt is READ ( io-control-spec-list )
[ input-item-list ]
42 R910 write-stmt is WRITE ( io-control-spec-list ) [ output-item-list ]
43
44 R912 io-control-spec is [ UNIT= ] io-unit
45 or [ FMT= ] format
46 or [ NML= ] namelist-group-name
47 or REC= scalar-int-expr
1 or IOSTAT= scalar-default-int-variable
2 or ERR= label
3 or END= label
4 or ADVANCE= scalar-default-char-expr
5 or SIZE= scalar-default-int-variable
6 or EOR= label
7 Constraint: An io-control-spec-list must contain exactly one
io-unit and may contain at most one of each of the
other specifiers.
9 Constraint: An END=, EOR=, or SIZE= specifier must not appear in
a write-stmt.
10 Constraint: The label in the ERR=, EOR=, or END= specifier must be
the statement label of a branch target statement that
appears in the same scoping unit as the data transfer
statement.
13 Constraint: A namelist-group-name must not be present if an input-
item-list or an output-item-list is present in the data
transfer statement.
15 Constraint: An io-control-spec-list must not contain both a format
and a namelist-group-name.
16 Constraint: If the optional characters UNIT= are omitted from the
unit specifier, the unit specifier must be the first
item in the control information list.
18 Constraint: If the optional characters FMT= are omitted from the
format specifier, the format specifier must be the
second item in the control information list and the
first item must be the unit specifier without the
optional characters UNIT=.
21 Constraint: If the optional characters NML= are omitted from the
namelist specifier, the namelist specifier must be
the second item in the control information list and
the first item must be the unit specifier without the
optional characters UNIT=.
24 Constraint: If the unit specifier specifies an internal file, the
io-control-spec-list must not contain a REC= specifier
or a namelist-group-name.
26 Constraint: If the REC= specifier is present, an END= specifier must
not appear, a namelist-group-name must not appear, and
the format, if any, must not be an asterisk specifying
list-directed input/output.
29 Constraint: An ADVANCE= specifier may be present only in a formatted
sequential input/output statement with explicit format
specification (10.1) whose control information list does
not contain an internal file unit specifier.
32 Constraint: If an EOR= specifier is present, and ADVANCE= specifier
also must appear.
33 R913 format is default-char-expr
34 or label
Page 324
1 or *
2
3 Constraint: The label must be the label of a FORMAT statement that
appears in the same scoping unit as the statement
containing the format specifier.
5 R914 input-item is variable
6 or io-implied-do
7 R915 output-item is expr
8 or io-implied-do
9 R916 io-implied-do is ( io-implied-do-object-list ,
io-implied-do-control )
10 R917 io-implied-do-object is input-item
11 or output-item
12 R918 io-implied-do-control is do-variable = scalar-numeric-
expr ,
scalar-numeric-expr [ , scalar-
numeric-expr ]
14
15 Constraint: The do-variable must be a scalar of type integer.
16 Constraint: Each scalar-numeric-expr in an io-implied-do-control
must be of type integer.
17 Constraint: In an input-item-list, an io-implied-do-object must be
an input-item. In an output-item-list, an io-implied-
do-object must be an output-item.
20 R919 backspace-stmt is BACKSPACE( position-spec-list )
21
22 R920 endfile-stmt is ENDFILE ( position-spec-list )
23
24 R921 rewind-stmt is REWIND ( position-spec-list )
25
26 R922 position-spec is [ UNIT = ] external-file-unit
27 or IOSTAT = scalar-default-int-
variable
28 or ERR = label
29 Constraint: The label in the ERR= specifier must be the statement
label of a branch target statement that appears in the
same scoping unit as the file positioning statement.
31 Constraint: If the optional characters UNIT= are omitted from the
unit specifier, the unit specifier must be the first
item in the position-spec-list.
33 Constraint: A position-spec-list must contain exactly one external-
file-unit and may contain at most one of each of the
other specifiers.
35 R923 inquire-stmt is INQUIRE ( inquire-spec-list )
36 or INQUIRE ( IOLENGTH =
scalar-default-int-variable )
output-item-list
38 R924 inquire-spec is [ UNIT = ] external-file-unit
39 or FILE = file-name-expr
40 or IOSTAT = scalar-default-int-
variable
41 or ERR = label
42 or EXIST = scalar-default-logical-
variable
43 or OPENED = scalar-default-
logical-variable
44 or NUMBER = scalar-default-int-
variable
45 or NAMED = scalar-default-logical-
variable
Page 325
1 or NAME = scalar-default-char-variable
2 or ACCESS = scalar-default-char-variable
3 or SEQUENTIAL = scalar-default-char-variable
4 or DIRECT = scalar-default-char-variable
5 or FORM = scalar-default-char-variable
6 or FORMATTED = scalar-default-char-variable
7 or UNFORMATTED = scalar-default-char-variable
8 or RECL = scalar-default-int-variable
9 or NEXTREC = scalar-default-int-variable
10
11 or POSITION = scalar-default-char-variable
12 or ACTION = scalar-default-char-variable
13 or READ = scalar-default-char-variable
14 or WRITE = scalar-default-char-variable
15 or READWRITE = scalar-default-char-variable
16 or DELIM = scalar-default-char-variable
17 or PAD = scalar-default-char-variable
18 Constraint: An inquire-spec-list must contain one FILE= specifier
or one UNIT= specifier, but not both, and at most one
of each of the other specifiers.
20 Constraint: In the inquire by unit form of the INQUIRE statement,
if the optional characters UNIT= are omitted from the
unit specifier, the unit specifier must be the first
item in the inquire-spec-list.
23 D.1.10 Input/Output Editing.
24 R1001 format-stmt is FORMAT format-specification
25 R1002 format-specification is ( format-item-list )
26 Constraint: The format-stmt must be labeled.
27 Constraint: The comma used to separate format-items in a format-
item-list is omitted as follows:
28:29
30 (2) Before a slash edit descriptor
31
32 (3) After a slash edit descriptor
33 (4) Before or after a colon edit descriptor
34 R1003 format-item is [ r ] data-edit-desc
35 or control-edit-desc
36 or char-string-edit-desc
37 or [ r ] ( format-item-list )
38 R1004 r is int-lit-constant
39 Constraint: r must be positive.
40 Constraint: r must not have a kind parameter specified for it.
41 R1005 data-edit-desc is I w [ . m ]
42 or B w [ . m ]
43 or O w [ . m ]
44 or Z w [ . m ]
45 or F w . d
Page 326
1 or E w . d [ E e ]
2 or EN w . d [ E e ]
3 or ES w . d [ E e ]
4 or G w . d [ E e ]
5 or L w
6 or A [ w ]
7
8 R1006 w is int-literal-constant
9 R1007 m is int-literal-constant
10 R1008 d is int-literal-constant
11 R1009 e is int-literal-constant
12 Constraint: w and e must be positive.
13 Constraint: w, m, d, and e must not have kind parameters specified
for them.
14 R1010 control-edit-desc is position-edit-desc
15 or /
16 or :
17 or sign-edit-desc
18:21
22 R1012 position-edit-desc is T n
23 or TL n
24 or TR n
25
26 R1013 n is int-literal-constant
27 Constraint: n must be positive.
28 Constraint: n must not have a kind parameter specified for it.
29 R1014 sign-edit-desc is SP
30 or SS
31:33
34 R1016 char-string-edit-desc is char-literal-constant
35:39
40 Constraint: The char-literal-constant must not have a kind parameter
specified for it.
Page 327
1 D.1.11 Program Units.
2 R1101 main-program is [ program-stmt ]
3 [ specification-part ]
4 [ execution-part ]
5 [ internal-subprogram-part ]
6 end-program-stmt
7 R1102 program-stmt is PROGRAM program-name
8 R1103 end-program-stmt is END PROGRAM program-name
9 Constraint: In a main-program, the execution-part must not contain
a RETURN statement.
11 Constraint: The program-name must be identical to the program-name
specified in the program-stmt.
14 Constraint: An automatic object must not appear in the
specification-part (R204) of a main program.
15 R1104 module is module-stmt
16 [ specification-part ]
17 [ module-subprogram-part ]
18 end-module-stmt
19 R1105 module-stmt is MODULE module-name
20 R1106 end-module-stmt is END MODULE module-name
21 Constraint: The module-name in the end-module-stmt, must be
identical to the module-name specified in the module-
* stmt.
25 Constraint: An automatic object must not appear in the
specification-part (R204) of a module.
26 R1107 use-stmt is USE module-name [ , rename-
list ]
27 or USE module-name , ONLY : [
only-list ]
28 R1108 rename is local-name => use-name
29 R1109 only is access-id
30 or [ local-name => ] use-name
31 Constraint: Each access-id must be a public entity in the module.
32 Constraint: Each use-name must be the name of a public entity in the
module.
33:43
Page 328
1:4
5 D.1.12 Procedures.
6 R1201 interface-block is interface-stmt
7 [ interface-body ] ...
8 [ module-procedure-stmt ] ...
9 end-interface-stmt
10 R1202 interface-stmt is INTERFACE [ generic-spec ]
11 R1203 end-interface-stmt is END INTERFACE
12 R1204 interface-body is function-stmt
13 [ specification-part ]
44 end-function-stmt
15 or subroutine-stmt
16 [ specification-part ]
17 end-subroutine-stmt
18 R1205 module-procedure-stmt is MODULE PROCEDURE procedure-
name-list
19 R1206 generic-spec is generic-name
20 or OPERATOR ( defined-operator )
21 or ASSIGNMENT ( = )
22 Constraint: An interface-body must not contain a format-stmt.
23
24 Constraint: The MODULE PROCEDURE specification is allowed only
if the interface-block has a generic-spec and has a
host that is a module or accesses a module by use
association; each procedure-name must be the name of
a module procedure that is accesible in the host.
27
28 Constraint: An interface-block in a subprogram must not contain
an interface-body for a procedure defined by that sub-
program.
30:32
33 R1209 function-reference is function-name ( [ actual-arg-
spec-list ] )
34
35 R1210 call-stmt is CALL subroutine-name ( [
actual-arg-spec-list ] )
36 R1211 actual-arg-spec is [ keyword = ] actual-arg
37 R1212 keyword is dummy-arg-name
38 R1213 actual-arg is expr
39 or variable
40 or procedure-name
41
42
Page 329
1 Constraint: The keyword = must not appear if the interface of the
procedure is implicit in the scoping unit.
3 Constraint: The keyword = may be omitted from an actual-arg-spec
only if the keyword = has been omitted from each
preceding actual-arg-spec in the argument list.
5 Constraint: Each keyword must be the name of a dummy argument in
the explicit interface of the procedure.
7 Constraint: A procedure-name actual-arg must not be the name of an
internal procedure and must not be the generic name of
a procedure (12.3.2.1, 13.1).
9:10
11 R1215 function-subprogram is function-stmt
12 [ specification-part ]
13 [ execution-part ]
14 [ internal-subprogram-part ]
15 end-function-stmt
16 R1216 function-stmt is [ prefix ] FUNCTION function-
name
( [ dummy-arg-name-list ] )
[ RESULT ( result-name ) ]
18 Constraint: The function-name, if different from the result-name,
must not appear in any specification statement in the
scoping unit of the function subprogram.
20 R1217 prefix is RECURSIVE
21
22 R1218 end-function-stmt is END FUNCTION function-name
23 Constraint: If RESULT is specified, result-name must not be the
same as function-name.
24 Constraint: FUNCTION must be present on the end-function-stmt of an
internal or module function.
25
26 Constraint: An internal function must not contain an internal-
subprogram-part.
27 Constraint: The function-name on the end-function-stmt must be
identical to the function-name specified in the
function-stmt.
29 R1219 subroutine-subprogram is subroutine-stmt
30 [ specification-part ]
31 [ execution-part ]
32 [ internal-subprogram-part ]
33 end-subroutine-stmt
34 R1220 subroutine-stmt is [ RECURSIVE ] SUBROUTINE
subroutine-name
( [ dummy-arg-list ] )
36 R1221 dummy-arg is dummy-arg-name
37
38 R1222 end-subroutine-stmt is END SUBROUTINE subroutine-name
39 Constraint: SUBROUTINE must be present on the end-subroutine-stmt
of an internal or module subroutine.
41
42 Constraint: An internal subroutine must not contain an internal-
subprogram-part.
Page 330
1 Constraint: The subroutine-name on the end-subroutine-stmt must be
identical to the subroutine-name specified in the
subroutine-stmt.
3:15
16 R1224 return-stmt is RETURN
17 Constraint: The return-stmt must be contained in the scoping unit of
a function or subroutine subprogram.
19
20 R1225 contains-stmt is CONTAINS
21:39
40 D.1.13 Intrinsic Procedures.
Page 331
1 D.1.14 Scope, Association, and Definition.
2 D.2 Cross References. In the following cross references, all
occurrences of scalar-xyz and xyz-list are treated as occurrences
of xyz.
5 D.2.1 Nonterminal Symbols That Are Defined.
6 Symbol Defined in Referenced in
7 ac-do-variable R435 R434
8 ac-implied-do R433 R432
9 ac-implied-do-control R434 R433
10 ac-value R432 R431 R433
11 access-id R522 R521 R1109
12 access-spec R510 R424 R503 R521
13 access-stmt R521 R214
14 action-stmt R216 R215 R807
15
16 actual-arg R1213 R1211
17 actual-arg-spec R1211 R1209 R1210
18 add-op R710 R310 R707
19 add-operand R706 R706 R707
20
21 allocate-lower-bound R627 R626
22 allocate-object R625 R624 R631
23 allocate-shape-spec R626 R624
24 allocate-stmt R622 R216
25 allocate-upper-bound R628 R626
26 allocation R624 R622
27 alphanumeric-character R302 R301 R304
28
29 and-op R720 R310 R716
30 and-operand R715 R716
31
32 array-constructor R431 R701
33 array-element R615 R602 R610
34 array-section R616 R602
35 array-spec R512 R503 R504
36
37
38 assignment-stmt R735 R216 R739
39 assumed-shape-spec R516 R512
40
41 attr-spec R503 R501
42 backspace-stmt R919 R216
43 binary-constant R408 R407
44
45 block R801 R802 R808 R823
46
47
48 block-do-construct R817 R816
49 boz-lit-constant R407 R306
Page 332
Symbol Defined in Referenced in
1
2 call-stmt R1210 R216
3 case-construct R808 R215
4 case-expr R812 R809
5 case-selector R813 R810
6 case-stmt R810 R808
7 case-value R815 R814
8 case-value-range R814 R813
9 char-constant R309 R843
10 char-expr R726 R731 R812
11 char-initz-expr R731 R815
12 char-length R508 R429 R504 R507
13 char-lit-constant R420 R306 R1016
14 char-selector R506 R502
15 char-string-edit-desc R1016 R1003
16 char-variable R605
17 character R301
18 close-spec R908 R907
19 close-stmt R907 R216
20
21
22 complex-lit-constant R417 R306
23 component-array-spec R428 R427 R429
24 component-attr-spec R427 R426
25 component-decl R429 R426
26 component-def-stmt R426 R422
27
28 concat-op R712 R310 R711
29 connect-spec R905 R904
30 constant R305 R309 R610 R701
31 constant-subobject R702 R701
32 contains-stmt R1225 R210 R212
33
34 control-edit-desc R1010 R1003
35 cycle-stmt R834 R216
36 d R1008
37 data-edit-desc R1003
38
39
40
41 data-ref R612 R614 R615 R616
42
43
44
45
46
47
48 deallocate-stmt R631 R216
49 declaration-construct R207 R204
50 default-char-expr R727 R905 R906 R908 R912 R913
51 default-char-variable R606 R903 R924
52 default-int-variable R608 R905 R908 R912 R913 R922
53 R923 R924
Page 333
Symbol Defined in Referenced in
1 default-logical-variable R604 R924
2 deferred-shape-spec R517 R428 R512
3 defined-binary-op R724 R311 R723
4 defined-operator R311 R1206
5 defined-unary-op R704 R311 R703
6 derived-type-def R422 R207
7 derived-type-stmt R424 R422
8 digit-string R402 R401 R404 R405 R413
R414
9
10 do-block R823 R817
11
12 do-construct R816 R215
13 do-stmt R818 R817
14
15
16 do-variable R822 R821 R918
17 dummy-arg R1221 R1220
18 e R1009 R1005
19 else-if-stmt R804 R802
20 else-stmt R805 R802
21 elsewhere-stmt R742 R739
22
23 end-do R824 R817
24 end-do-stmt R825 R824
25 end-function-stmt R1218 R216 R1204 R1215
26 end-if-stmt R806 R802
27 end-interface-stmt R1203 R1201
28 end-module-stmt R1106 R1104
29 end-program-stmt R1103 R216 R1101
30 end-select-stmt R811 R808
31 end-subroutine-stmt R1222 R216 R1204 R1219
32 end-type-stmt R425 R422
33 end-where-stmt R743 R739
34 endfile-stmt R920 R216
35 entity-decl R504 R501
36
37 equiv-op R722 R310 R718
38 equiv-operand R717 R717 R718
39
40
41
42 executable-construct R215 R208 R209
43 executable-program R201
44 execution-part R208 R1101 R1215 R1219
45 execution-part-construct R209 R208 R801
46 exit-stmt R835 R216
47 explicit-shape-spec R513 R428 R512
R624
48 exponent (xpn) R416 R413
49 exponent-letter (xpn-letter)R415 R413
50 expr R723 R430 R432 R701 R723
51 R725 R726 R727 R728
52 R729 R730 R735 R737
R915 R1213
53 extended-intrinsic-op R312 R311
Page 334
Symbol Defined in Referenced in
1 external-file-unit R902 R901 R905 R908 R919
2 R920 R921 R922 R924
3
4 external-subprogram R203 R202
5 file-name-expr R906 R905 R924
6 format R913 R909 R912
7 format-item R1003 R1002 R1003
8 format-specification R1002 R1001
9 format-stmt R1001 R206 R207 R209
10 function-reference R1209 R701
11 function-stmt R1216 R1204 R1215
12 function-subprogram R1215 R203 R211 R213
13 generic-spec R1206 R522 R1202
14 goto-stmt R836 R216
15 hex-constant R410 R407
16 hex-digit R411 R410
17 if-construct R802 R215
14 if-stmt R807 R216
15 if-then-stmt R803 R802
16 imag-part R419 R417
17 implicit-part R205 R204
18 implicit-part-stmt R206 R205
19
20
21 initz-expr R730 R504
22
23 input-item R914 R909 R917
24 inquire-spec R924 R923
25 inquire-stmt R923 R216
26
27 int-expr R728 R434 R611 R617
28 R620 R621 R732 R734
29 R812 R902 R905
R912 R1224
30 int-initz-expr R732 R505 R506 R815
31 int-lit-constant R404 R306 R403 R508 R1004
32 R1006 R1007 R1008 R1009
33 int-variable R607 R435 R623
34 intent-spec R511 R503
35
36 interface-block R1201 R207
37 interface-body R1204 R1201
38 interface-stmt R1202 R1201
39 internal-file-unit R903 R901
40 internal-subprogram R211 R210
41 internal-subprogram-part R210 R1101 R1215 R1219
42 intrinsic-operator R310 R312
43
44 io-control-spec R912 R909 R910
45 io-implied-do R916 R914 R915
46 io-implied-do-control R918 R916
47 io-implied-do-object R917 R916
48 io-unit R901 R912
Page 335
Symbol Defined in Referenced in
1
2 keyword R1212 R1211
3 kind-param R405 R404 R413 R420 R421
4 kind-selector R505 R502
5 label R313 R836 R905 R908 R912
6 R913 R922 R924
7
8
9 length-selector R507 R506
10
11 level-1-expr R703 R705
12 level-2-expr R707 R707 R711
13 level-3-expr R711 R711 R713
14 level-4-expr R713 R715
15 level-5-expr R718 R718 R723
16 lit-constant R306 R305
17 logical-expr R725 R733 R741 R803 R804
18 R807 R812 R821
19 logical-initz-expr R733 R815
20 logical-lit-constant R421 R306
21 logical-variable R603
22 loop-control R821 R820
23 lower-bound R514 R513 R516
24 m R1007 R1005
25 main-program R1101 R202
26 mask-expr R741 R740
27 module R1104 R202
28 module-procedure-stmt R1205 R1201
29 module-stmt R1105 R1104
30 module-subprogram R213 R212
31 module-subprogram-part R212 R1104
32 mult-op R709 R310 R706
33 mult-operand R705 R705 R706
34 n R1013 R1012
35 name R304 R307
36 named-constant R307 R305
37
38 namelist-group-object R544 R543
39 namelist-stmt R543 R214
40
41 nonlabel-do-stmt R820 R818
42 not-op R719 R310 R715
43 nullify-stmt R626 R216
44 numeric-expr R729 R821 R918
45 octal-constant R409 R407
46 only R1109 R1107
47 open-stmt R904 R216
48 optional-stmt R520 R214
49 or-op R721 R310 R717
50 or-operand R716 R716 R717
51
52 output-item R915 R910 R917 R923
53
Page 336
Symbol Defined in Referenced in
1 parent-string R610 R609
2 part-ref R613 R612
3
4 pointer-assignment-stmt R736 R216
5 pointer-object R627 R626 R736
6
7 position-edit-desc R1012 R1010
8 position-spec R922 R919 R920 R921
9 power-op R708 R310 R705
10 prefix R1217 R1216
11 primary R701 R703
12
13 private-sequence-stmt R423 R422
14 program-stmt R1102 R1101
15 program-unit R202 R201
16 r R1004 R1003
6 read-stmt R909 R216
7 real-lit-constant R413 R306 R412
8 real-part R418 R417
9 rel-op R714 R310 R713
10 rename R1108 R1107
11 return-stmt R1224 R216
12 rewind-stmt R921 R216
13
14
15 section-subscript R618 R613
16 select-case-stmt R809 R808
17
18 sign R406 R401 R403 R412
19 sign-edit-desc R1014 R1010
20 signed-digit-string R401 R416
21 signed-int-lit-constant R403 R418 R419
22 signed-real-lit-constant R412 R418 R419
23 significand R414 R413
24 specification-expr R734 R509 R514 R515
25 specification-part R204 R1101 R1104 R1204 R1215
26 R1219
27 specification-stmt R214 R207
28 stat-variable R623 R622 R631
29
30 stop-code R843 R842
31 stop-stmt R842 R216
32 stride R620 R619
33 structure-component R614 R602 R610 R625 R627
34 structure-constructor R430 R701
35 subobject R602 R601 R702
36 subroutine-stmt R1220 R1204 R1219
37 subroutine-subprogram R1219 R203 R211 R213
38 subscript R617 R618 R619
39 subscript-triplet R619 R618
40 substring R609 R602
41 substring-range R611 R609 R616
42 target R737 R736
Page 337
Symbol Defined in Referenced in
1
2 type-declaration-stmt R501 R207
3 type-param-value R509 R506 R507 R508
4 type-spec R502 R426 R501 R1217
5 underscore R303 R302
6 upper-bound R515 R513
7 use-stmt R1107 R204
8 variable R601 R603 R604 R605 R606
9 R607 R608 R701 R735
10 R737 R822 R914 R1213
11 vector-subscript R621 R618
12 w R1006 R1005
13 where-construct R739 R215
14 where-construct-stmt R740 R739
15
16 write-stmt R910 R216
17 D.2.2 Nonterminal Symbols That Are Not Defined.
18 array-name R526
19 array-variable-name R601
20
21 case-construct-name R809 R810 R811
22
23 component-name R429
24 digit R302 R313 R402 R408
25 R409 R411 R843
26 do-construct-name R820 R825 R834 R835
27
28 dummy-arg-name R520 R1212 R1216 R1221
29
30
31 function-name R504 R1209 R1216 R1218
32 generic-name R1206
33 if-construct-name R803 R804 R805 R806
34 int-constant-name R405
35
36 letter R302 R304 R704 R724
37 local-name R1108 R1109
38 module-name R1105 R1106 R1107
39 namelist-group-name R543 R912
26 object-name R504
27 part-name R613
28 procedure-name R1205 R1213
29 program-name R1102 R1103
30 rep-char R420 R1016
31 result-name R1216
32 special-character R301
33 subroutine-name R1210 R1220 R1222
34 type-name R424 R425 R430 R502
35 use-name R522 R1108 R1109
36 variable-name R544 R601 R610 R625
37 R627
Page 338
Symbol Defined in Referenced in
1 D.2.3 Terminal Symbols.
2 % R612
3 ' R408 R409 R410 R420
4 ( R417 R427 R429 R430
R433 R502 R503 R504
R505 R506 R507 R508
R609 R613 R616 R622
R624 R626 R631 R701
R740 R803 R804 R807
R809 R813 R821 R904
R907 R909 R910 R916
R919 R920 R921 R923
R1002 R1003 R1206 R1209
R1210 R1216 R1220
16 (/ R431
17 ) R417 R427 R429 R430
R433 R502 R503 R504
R505 R506 R507 R508
R609 R613 R616 R622
R624 R626 R631 R701
R740 R803 R804 R807
R809 R813 R821 R904
R907 R909 R910
R916 R919 R920 R921
R923 R1002 R1003 R1206
R1209 R1210 R1216 R1220
29 * R429 R504 R507 R509
R709 R901 R913 R1221
32 ** R708
33 + R406 R710
34 , R417 R424 R426 R433
R434 R501 R506 R507
R543 R622 R631 R821
R909 R916 R918 R1107
24 - R406 R710
25 . R414 R704 R724 R1005
26 .AND. R720
27 .EQ. R714
28 .EQV. R722
29 .FALSE. R421
30 .GE. R714
31 .GT. R714
32 .LE. R714
33 .LT. R714
34 .NE. R714
35 .NEQV. R722
Page 339
Symbol Defined in Referenced in
1 .NOT. R719
2 .OR. R721
3 .TRUE. R421
4 / R543 R709 R1010
5
6 /) R431
7 // R712
8 /= R714
9 : R513 R516 R517 R611
10 R619 R803 R809 R814
11 R820 R1010 R1107
12 :: R424 R426 R501 R520
13 R5211
14
15 < R714
16 <= R714
17 = R434 R504 R505 R507
18 R622 R631 R735 R821
19 R918 R922 R923 R924 R1206
20 R1211
21
22 == R714
23 => R736 R1108 R1109
24 > R714
25 >= R714
26 A R411 R1005
27 ACCESS R905 R924
28 ACTION R905 R924
29 ADVANCE R912
30 ALLOCATABLE R503 R526
31 ALLOCATE R622
32
33 ASSIGNMENT R1206
34 B R408 R411 R1005
35 BACKSPACE R919
36
37
38
39
40 C R411
41 CALL R1210
42 CASE R809 R810
43 CHARACTER R502
44 CLOSE R907
45
46 COMPLEX R502
47 CONTAINS R1225
48
49 CYCLE R834
50 D R411
51
52 DEALLOCATE R631
53 DEFAULT R813
Page 340
Symbol Defined in Referenced in
1 DELIM R905 R924
2 DIMENSION R427 R503
3 DIRECT R924
4 DO R820 R825
5
6 E R411 R415 R1005
7 ELSE R804 R805
8 ELSEWHERE R742
9 EN R1005
10 END R425 R743 R806 R811
11 R825 R912 R1103 R1106
12 R1203 R1218 R1222
13 ENDFILE R920
14
15 EOR R912
16
17 ERR R905 R908 R912 R922
R924
18 ES R905 R1005
19 EXIST R924
20 EXIT R835
21
22 F R411 R1005
23 FILE R905 R924
24 FMT R912
25 FORM R905 R924
26 FORMAT R1001
27 FORMATTED R924
28 FUNCTION R1216 R1218
29 G R1005
30 GO R836
14
15 I R1005
16 IF R803 R804 R806 R807
17 IMPLICIT R205
18 IN R511
19 IN OUT R511
20 INQUIRE R923
21 INTEGER R502
22 INTENT R503
23 INTERFACE R1202 R1203
24
25 IOLENGTH R923
27 IOSTAT R905 R908 R912 R922 R924
29 KIND R505 R506
30 L R1005
32 LEN R506 R507
33 LOGICAL R502
34 MODULE R1105 R1106 R1205
35 NAME R924
36 NAMED R924
37 NAMELIST R543
38 NEXTREC R924
39 NML R912
Page 341
Symbol Defined in Referenced in
1 NONE R205
2 NULLIFY R626
3 NUMBER R924
4 O R409 R1005
5 ONLY R1107
6 OPEN R904
7 OPENED R924
8 OPERATOR R1206
9 OPTIONAL R503 R520
10 OUT R511
50
51 PAD R905 R924
53 PARAMETER R503
54
55 POINTER R427 R503
56 POSITION R905 R924
2
3
4 PRIVATE R423 R510
5 PROCEDURE R1205
6 PROGRAM R1102 R1103
7 PUBLIC R510
8 READ R909 R924
9 READWRITE R924
10 REAL R502
11 REC R912
12 RECL R924 R924
14 RECURSIVE R1217 R1220
15 RESULT R1216
16 RETURN R1224
17 REWIND R921
18
19 SAVE R503
20 SELECT R809 R811
21 SEQUENCE R423
22 SEQUENTIAL R924
23 SIZE R912
24 SP R1014
25 SS R1014
26 STAT R622 R631
27 STATUS R905 R908
28 STOP R842
29 SUBROUTINE R1220 R1222
30 T R1012
31 TARGET R503
32 THEN R803 R804
33 TL R1012
34 TO R836
35 TR R1012
36 TYPE R424 R425 R502
37 UNFORMATTED R924
39 UNIT R905 R908 R912 R922
R924
40 USE R1107
Page 342
Symbol Defined in Referenced in
1 WHERE R739 R740 R743
2 WHILE R821
3 WRITE R910 R924
4
5 Z R410 R1005
6 _ R303 R404 R413 R420
R421
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