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re PR fortran/41235 (Missing explicit interface for variable-length character functions) 

2009-12-15  Tobias Burnus  <burnus@net-b.de>
            Daniel Franke  <franke.daniel@gmail.com>

        PR fortran/41235
        * resolve.c (resolve_global_procedure): Add check for
        presence of an explicit interface for nonconstant,
        nonassumed character-length functions.
        (resolve_fl_procedure): Remove check for nonconstant
        character-length functions.

2009-12-15  Tobias Burnus  <burnus@net-b.de>

        PR fortran/41235
        * auto_char_len_1.f90: New test.
        * auto_char_len_2.f90: New test.
        * auto_char_len_4.f90: Correct test.

From-SVN: r155247
This commit is contained in:
Tobias Burnus 2009-12-15 09:37:41 +01:00
parent 0857d1f0b1
commit d94be5e02d
6 changed files with 112 additions and 24 deletions
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10
gcc/fortran/ChangeLog
View File

@ -1,3 +1,13 @@
2009-12-15 Tobias Burnus <burnus@net-b.de>
Daniel Franke <franke.daniel@gmail.com>
PR fortran/41235
* resolve.c (resolve_global_procedure): Add check for
presence of an explicit interface for nonconstant,
nonassumed character-length functions.
(resolve_fl_procedure): Remove check for nonconstant
character-length functions.
2009-12-14 Daniel Franke <franke.daniel@gmail.com>
PR fortran/42354

30
gcc/fortran/resolve.c
View File

@ -1831,6 +1831,21 @@ resolve_global_procedure (gfc_symbol *sym, locus *where,
"explicit INTERFACE or the rank is incorrect", sym->name,
where);
/* Non-assumed length character functions. */
if (sym->attr.function && sym->ts.type == BT_CHARACTER
&& gsym->ns->proc_name->ts.u.cl->length != NULL)
{
gfc_charlen *cl = sym->ts.u.cl;
if (!sym->attr.entry_master && sym->attr.if_source == IFSRC_UNKNOWN
&& cl && cl->length && cl->length->expr_type != EXPR_CONSTANT)
{
gfc_error ("Nonconstant character-length function '%s' at %L "
"must have an explicit interface", sym->name,
&sym->declared_at);
}
}
if (gfc_option.flag_whole_file == 1
|| ((gfc_option.warn_std & GFC_STD_LEGACY)
&&
@ -9038,24 +9053,13 @@ resolve_fl_procedure (gfc_symbol *sym, int mp_flag)
&& resolve_charlen (cl) == FAILURE)
return FAILURE;
if (!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT)
{
if (sym->attr.proc == PROC_ST_FUNCTION)
if ((!cl || !cl->length || cl->length->expr_type != EXPR_CONSTANT)
&& sym->attr.proc == PROC_ST_FUNCTION)
{
gfc_error ("Character-valued statement function '%s' at %L must "
"have constant length", sym->name, &sym->declared_at);
return FAILURE;
}
if (sym->attr.external && sym->formal == NULL
&& cl && cl->length && cl->length->expr_type != EXPR_CONSTANT)
{
gfc_error ("Automatic character length function '%s' at %L must "
"have an explicit interface", sym->name,
&sym->declared_at);
return FAILURE;
}
}
}
/* Ensure that derived type for are not of a private type. Internal

7
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2009-12-15 Tobias Burnus <burnus@net-b.de>
PR fortran/41235
* auto_char_len_1.f90: New test.
* auto_char_len_2.f90: New test.
* auto_char_len_4.f90: Correct test.
2009-12-14 Jason Merrill <jason@redhat.com>
PR c++/42364

27
gcc/testsuite/gfortran.dg/auto_char_len_1.f90 Normal file
View File

@ -0,0 +1,27 @@
! { dg-do compile }
! { dg-options "" }
! [option to disable -pedantic as assumed character length
! functions are obsolescent]
!
! PR fortran/41235
!
character(len=*) function func()
func = 'ABC'
end function func
subroutine test(i)
integer :: i
character(len=i), external :: func
print *, func()
end subroutine test
subroutine test2(i)
integer :: i
character(len=i) :: func
print *, func()
end subroutine test2
call test(2)
call test2(2)
end

25
gcc/testsuite/gfortran.dg/auto_char_len_2.f90 Normal file
View File

@ -0,0 +1,25 @@
! { dg-do compile }
! { dg-options "-fwhole-file" }
!
! PR fortran/41235
!
character(len=*) function func()
func = 'ABC'
end function func
subroutine test(i)
integer :: i
character(len=i), external :: func
print *, func()
end subroutine test
subroutine test2(i)
integer :: i
character(len=i) :: func
print *, func()
end subroutine test2
call test(2)
call test2(2)
end

17
gcc/testsuite/gfortran.dg/auto_char_len_4.f90
View File

@ -1,20 +1,31 @@
! { dg-do compile }
! { dg-options "-fwhole-file" }
!
! Tests the fix for PR25087, in which the following invalid code
! was not detected.
!
! Contributed by Joost VandeVondele <jv244@cam.ac.uk>
!
! Modified by Tobias Burnus to fix PR fortran/41235.
!
FUNCTION a()
CHARACTER(len=10) :: a
a = ''
END FUNCTION a
SUBROUTINE s(n)
CHARACTER(LEN=n), EXTERNAL :: a ! { dg-error "must have an explicit interface" }
CHARACTER(LEN=n), EXTERNAL :: d ! { dg-error "must have an explicit interface" }
interface
function b (m) ! This is OK
CHARACTER(LEN=m) :: b
integer :: m
end function b
end interface
write(6,*) a(n)
write(6,*) a()
write(6,*) b(n)
write(6,*) c()
write(6,*) d()
contains
function c () ! This is OK
CHARACTER(LEN=n):: c
@ -22,3 +33,7 @@ contains
end function c
END SUBROUTINE s
FUNCTION d()
CHARACTER(len=99) :: d
d = ''
END FUNCTION d