95f4ca7f5d
The predicate "CanBeCalledViaImplicitInterface()" was returning false for restricted specific intrinsic functions (e.g., SIN) because their procedure characteristics have the elemental attribute; this leads to a bogus semantic error when one attempts to use them as proc-targets in procedure pointer assignment statements when the left-hand side of the assignment is a procedure pointer with an implicit interface. However, these restricted specific intrinsic functions have always been allowed as special cases for such usage -- it is as if they are elemental when it is necessary for them to be so, but not when it's a problem. Differential Revision: https://reviews.llvm.org/D130386
69 lines
2.8 KiB
Fortran
69 lines
2.8 KiB
Fortran
! RUN: %python %S/test_errors.py %s %flang_fc1
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! Procedure pointer assignments and argument association with intrinsic functions
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program test
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abstract interface
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real function realToReal(a)
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real, intent(in) :: a
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end function
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real function intToReal(n)
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integer, intent(in) :: n
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end function
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end interface
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procedure(), pointer :: noInterfaceProcPtr
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procedure(realToReal), pointer :: realToRealProcPtr
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procedure(intToReal), pointer :: intToRealProcPtr
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intrinsic :: float ! restricted specific intrinsic functions
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intrinsic :: sqrt ! unrestricted specific intrinsic functions
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external :: noInterfaceExternal
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interface
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elemental real function userElemental(a)
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real, intent(in) :: a
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end function
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end interface
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!ERROR: 'float' is not an unrestricted specific intrinsic procedure
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noInterfaceProcPtr => float
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!ERROR: 'float' is not an unrestricted specific intrinsic procedure
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intToRealProcPtr => float
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!ERROR: 'float' is not an unrestricted specific intrinsic procedure
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call sub1(float)
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!ERROR: 'float' is not an unrestricted specific intrinsic procedure
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call sub2(float)
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!ERROR: 'float' is not an unrestricted specific intrinsic procedure
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call sub3(float)
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noInterfaceProcPtr => sqrt ! ok
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realToRealProcPtr => sqrt ! ok
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!ERROR: Procedure pointer 'inttorealprocptr' associated with incompatible procedure designator 'sqrt': incompatible dummy argument #1: incompatible dummy data object types: INTEGER(4) vs REAL(4)
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intToRealProcPtr => sqrt
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call sub1(sqrt) ! ok
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call sub2(sqrt) ! ok
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!ERROR: Actual procedure argument has interface incompatible with dummy argument 'p=': incompatible dummy argument #1: incompatible dummy data object types: INTEGER(4) vs REAL(4)
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call sub3(sqrt)
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noInterfaceProcPtr => noInterfaceExternal ! ok
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realToRealProcPtr => noInterfaceExternal ! ok
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intToRealProcPtr => noInterfaceExternal !ok
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call sub1(noInterfaceExternal) ! ok
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!WARNING: Actual procedure argument has an implicit interface which is not known to be compatible with dummy argument 'p=' which has an explicit interface
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call sub2(noInterfaceExternal)
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!WARNING: Actual procedure argument has an implicit interface which is not known to be compatible with dummy argument 'p=' which has an explicit interface
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call sub3(noInterfaceExternal)
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!ERROR: Procedure pointer 'nointerfaceprocptr' with implicit interface may not be associated with procedure designator 'userelemental' with explicit interface that cannot be called via an implicit interface
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noInterfaceProcPtr => userElemental
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!ERROR: Non-intrinsic ELEMENTAL procedure 'userelemental' may not be passed as an actual argument
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call sub1(userElemental)
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contains
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subroutine sub1(p)
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external :: p
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end subroutine
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subroutine sub2(p)
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procedure(realToReal) :: p
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end subroutine
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subroutine sub3(p)
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procedure(intToReal) :: p
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end subroutine
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end
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