tree_list not supported by dump_type (Historical Question)

tree_list not supported by dump_type (Historical Question)

[Ernest L. Williams Jr.]

Hi,

When the following message occured in gcc-2.95 it was addressed in
gcc-2.95.1
===============================================================================
new_test1.cc:14: sorry, not implemented: `tree_list' not supported by
dump_type
new_test1.cc:14: ANSI C++ prohibits conversion from `()' to `(...)'
===============================================================================

Looks like the following files were modified to achieve this:
"gcc/gcc/cp/error.c"  and  "gcc/gcc/cp/typeck.c"


Did this fix survive in gcc-3.X.X?   Was this considered a compiler and
later as GCC became more
ISO C++ compliant the patch was removed?   Any help in understanding is
appreciated.




====== snippet from gcc/gcc/cp/typeck.c in gcc-2.951  ===========
--- 1355,1367 ----

    if (t1 == 0 && t2 != 0)
      {
!       if (! flag_strict_prototype && t2 == void_list_node)
!       /* t1 might be the arglist of a function pointer in extern "C"
!          declared to take (), which we fudged to (...).  Don't make
the
!          user pay for our mistake.  */;
!       else
!       cp_pedwarn ("ANSI C++ prohibits conversion from `%#T' to `
(...)'",
!                   parms2);
        return self_promoting_args_p (t2);
      }
    if (t2 == 0)
***************
*** 6360,6366 ****

Thanks,
Ernest L. Williams Jr.

Re: tree_list not supported by dump_type (Historical Question)

[Giovanni Bajo]

Ernest L. Williams Jr. <ernesto@ornl.gov> wrote:

> Did this fix survive in gcc-3.X.X?   Was this considered a compiler and
> later as GCC became more
> ISO C++ compliant the patch was removed?   Any help in understanding is
> appreciated.

Do you have a testcase?
-- 
Giovanni Bajo

Re: tree_list not supported by dump_type (Historical Question)

[Giovanni Bajo]

Ernest L. Williams Jr. <ernesto@ornl.gov> wrote:

>> Do you have a testcase?
>
============================================================================
==========
> #include <stdio.h>
>
> int incr(int i){return ++i;}
>
> main()
> {
>   int (*dummy)(...);
>   dummy=incr;
>   (void)printf("%d\n",dummy(1));
>   return(0);
> }
>
============================================================================
=============
>
>
> The above code should yield the error I mention under gcc-2.95

2.95 is five years old and unsupported at this point. With a current GCC
release (3.4.2), I get this:

GNU C++ version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3) (i386-redhat-linux)
        compiled by GNU C version 3.4.2 20041017 (Red Hat 3.4.2-6.fc3).
GGC heuristics: --param ggc-min-expand=33 --param ggc-min-heapsize=6250
bahf.cc:6: warning: ISO C++ forbids declaration of `main' with no type
bahf.cc: In function `int main()':
bahf.cc:8: error: invalid conversion from `int (*)(int)' to `int (*)(...)'

So whatever that patch is, it is not required anymore.
-- 
Giovanni Bajo