[Bug preprocessor/36906] New: #pragma GNU poison index()

[Bug preprocessor/36906] New: #pragma GNU poison index()

[Dave at Yost dot com]

There should be a way to poison a symbol only when it is used as a function or
macro call. I suggest that following a symbol with a pair of parentheses might
be a serviceable syntax for this. With this feature, the symbol rindex would
still be usable for variables.


-- 
           Summary: #pragma GNU poison index()
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: preprocessor
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: Dave at Yost dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906

Re: [Bug preprocessor/36906] New: #pragma GNU poison index()

[Andrew Thomas Pinski]

Try the attribute deprecated.

Sent from my iPhone

On Jul 22, 2008, at 23:50, "Dave at Yost dot com" <gcc-bugzilla@gcc.gnu.org 
 > wrote:

> There should be a way to poison a symbol only when it is used as a  
> function or
> macro call. I suggest that following a symbol with a pair of  
> parentheses might
> be a serviceable syntax for this. With this feature, the symbol  
> rindex would
> still be usable for variables.
>
>
> -- 
>           Summary: #pragma GNU poison index()
>           Product: gcc
>           Version: unknown
>            Status: UNCONFIRMED
>          Severity: enhancement
>          Priority: P3
>         Component: preprocessor
>        AssignedTo: unassigned at gcc dot gnu dot org
>        ReportedBy: Dave at Yost dot com
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906
>

[Bug preprocessor/36906] #pragma GNU poison index()

[pinskia at gmail dot com]

------- Comment #1 from pinskia at gmail dot com  2008-07-23 07:09 -------
Subject: Re:   New: #pragma GNU poison index()

Try the attribute deprecated.

Sent from my iPhone

On Jul 22, 2008, at 23:50, "Dave at Yost dot com" <gcc-bugzilla@gcc.gnu.org 
 > wrote:

> There should be a way to poison a symbol only when it is used as a  
> function or
> macro call. I suggest that following a symbol with a pair of  
> parentheses might
> be a serviceable syntax for this. With this feature, the symbol  
> rindex would
> still be usable for variables.
>
>
> -- 
>           Summary: #pragma GNU poison index()
>           Product: gcc
>           Version: unknown
>            Status: UNCONFIRMED
>          Severity: enhancement
>          Priority: P3
>         Component: preprocessor
>        AssignedTo: unassigned at gcc dot gnu dot org
>        ReportedBy: Dave at Yost dot com
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906
>


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906

[Bug preprocessor/36906] #pragma GNU poison index()

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2008-08-11 00:28 -------
Let me expand on what I mean by the attribute deprecated.
See http://gcc.gnu.org/onlinedocs/gcc-4.3.0/gcc/Function-Attributes.html:

deprecated
The deprecated attribute results in a warning if the function is used anywhere
in the source file. This is useful when identifying functions that are expected
to be removed in a future version of a program. The warning also includes the
location of the declaration of the deprecated function, to enable users to
easily find further information about why the function is deprecated, or what
they should do instead. Note that the warnings only occurs for uses:
          int old_fn () __attribute__ ((deprecated));
          int old_fn ();
          int (*fn_ptr)() = old_fn;

results in a warning on line 3 but not line 2.

The deprecated attribute can also be used for variables and types (see Variable
Attributes, see Type Attributes.) 


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906

[Bug preprocessor/36906] #pragma GNU poison index()

[tromey at gcc dot gnu dot org]

------- Comment #3 from tromey at gcc dot gnu dot org  2008-09-02 19:22 -------
One problem with this approach is that this code would not error:

#include <string.h>
char (*fnptr)() = rindex;

I tend to agree with Andrew -- poisoning is too crude a tool for this use.

Is there a reason you do not use deprecation here?


-- 

tromey at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906

[Bug preprocessor/36906] #pragma GNU poison index()

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2008-12-24 23:07 -------
No answer in 3 months so closing.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36906