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The Fortran standard committees passed an "interp" request at their June 2024 meetings that is distinct from nearly every other Fortran compiler that I tried (6) in an an ambiguous case (parent component naming when the base type has been renamed via USE association). Document this case in flang/docs/Extensions.md as an intentional instance of non-conformance chosen for portability and better usability.
71 lines
2.9 KiB
Fortran
71 lines
2.9 KiB
Fortran
! RUN: %python %S/test_errors.py %s %flang_fc1
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! Every other Fortran compiler (but one) interprets the names of parent
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! components like this when the names of their types are the product of
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! USE association with renaming.
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module m1
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type originalName
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integer m
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end type
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end
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module m2
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use m1, newName => originalName
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type, extends(newName) :: extended
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integer n
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end type
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type, extends(newName) :: extended2
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integer originalName ! ok
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end type
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contains
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subroutine s1
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type(extended) x
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type(extended2) x2
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print *, x%newName%m ! ok
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!ERROR: Component 'originalname' not found in derived type 'extended'
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print *, x%originalName
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print *, extended(newName=newName(m=1),n=2) ! ok
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!ERROR: Structure constructor lacks a value for component 'm'
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!ERROR: Keyword 'originalname=' does not name a component of derived type 'extended'
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!ERROR: Keyword 'm=' may not appear in a reference to a procedure with an implicit interface
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print *, extended(originalName=originalName(m=1),n=2)
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!ERROR: Value in structure constructor of type 'REAL(4)' is incompatible with component 'newname' of type 'newname'
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!ERROR: Keyword 'm=' may not appear in a reference to a procedure with an implicit interface
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print *, extended(newName=originalName(m=1),n=2)
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!ERROR: Structure constructor lacks a value for component 'm'
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!ERROR: Keyword 'originalname=' does not name a component of derived type 'extended'
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print *, extended(originalName=newName(m=1),n=2)
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print *, x2%newName%m ! ok
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print *, x2%originalName ! ok
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print *, extended2(newName=newName(m=1),originalName=2) ! ok
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end
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end
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module m3
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use m2
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contains
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! Same as above, but not in the same module as the derived
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! types' definitions.
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subroutine s2
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type(extended) x
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type(extended2) x2
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print *, x%newName%m ! ok
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!ERROR: Component 'originalname' not found in derived type 'extended'
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print *, x%originalName
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print *, extended(newName=newName(m=1),n=2) ! ok
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!ERROR: Structure constructor lacks a value for component 'm'
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!ERROR: Keyword 'originalname=' does not name a component of derived type 'extended'
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!ERROR: Keyword 'm=' may not appear in a reference to a procedure with an implicit interface
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print *, extended(originalName=originalName(m=1),n=2)
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!ERROR: Value in structure constructor of type 'REAL(4)' is incompatible with component 'newname' of type 'newname'
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!ERROR: Keyword 'm=' may not appear in a reference to a procedure with an implicit interface
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print *, extended(newName=originalName(m=1),n=2)
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!ERROR: Structure constructor lacks a value for component 'm'
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!ERROR: Keyword 'originalname=' does not name a component of derived type 'extended'
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print *, extended(originalName=newName(m=1),n=2)
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print *, x2%newName%m ! ok
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print *, x2%originalName ! ok
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print *, extended2(newName=newName(m=1),originalName=2) ! ok
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end
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end
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