The type of a function interface is not taken over from the
MODULE PROCEDURE's which constitute the INTERFACE.
---BUG.f90--- start
module interface_vs_functions_bug
implicit none
private
interface ex1 ! fails, but should be ok
module procedure func1, func2
end interface
interface ex2 ! works by workaround below
module procedure func1, func2
end interface
real :: ex2
! This workaround should not even be allowed:
! func1 and func2 can differ in return type
! see eg Metcalf and Reid, Fortran 90/95 explained, sec. ed, p94
interface ex3
module procedure func1, func3
end interface
! real :: ex3 !! This workaround is not possible here-
! return types of func1 and func 3 differ...
contains
real function func1(x)
real, intent(in) :: x
func1 = 1.
end function func1
real function func2(i)
integer, intent(in) :: i
func2 = ex1(real(i))
! workaround: func2 = func1(real(i))
end function func2
integer function func3(i)
integer, intent(in) :: i
func3 = 1
end function func3
end module Interface_vs_functions_bug
---BUG.f90--- end
Test compile:
gfortran -c BUG.f90
In file BUG.f90:33
func2 = ex1(real(i))
1
Error: Symbol 'ex1' at (1) has no IMPLICIT type
----------
gcc -v
Es werden eingebaute Spezifikationen verwendet.
Ziel: i686-pc-linux-gnu
Konfiguriert mit: ../configure
Thread-Modell: posix
gcc-Version 4.0.0
--
Summary: INTERFACE/FUNCTION problem
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: fortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: klra67 at freenet dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21401
