[Bug c/36708] New: syntatic warning

[robert dot lore at opensyscon dot com dot au]

I think this code is syntactically correct, but can cause problems in
debugging. If you don't scrutinize the code too carefully you can waste time
here - code was a cut and paste from strcpy to integer assignment with
resultant comma not changed to assignment.

 // this code does nothing !
 f -> font_size, current_font_size;

 // this code does something
 f -> font_size= current_font_size;

should this produce a warning like "statement does nothing" ? its like an
unused variable warning, it is a courtesy thing..


-- 
   Summary: syntatic warning
   Product: gcc
   Version: 4.1.2
Status: UNCONFIRMED
  Severity: trivial
  Priority: P3
 Component: c
AssignedTo: unassigned at gcc dot gnu dot org
    ReportedBy: robert dot lore at opensyscon dot com dot au
 GCC build triplet: same
  GCC host triplet: x86 linux (redhat) gcc
GCC target triplet: same


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36708

[Bug c/36708] syntatic warning

[robert dot lore at opensyscon dot com dot au]

--- Comment #3 from robert dot lore at opensyscon dot com dot au  
2008-07-22 05:56 ---
Subject: RE:  syntatic warning

I did not have the flags you nominated set.
Thanks for you assistance
Robert

-Original Message-
From: manu at gcc dot gnu dot org [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, 22 July 2008 2:17 AM
To: [EMAIL PROTECTED]
Subject: [Bug c/36708] syntatic warning



--- Comment #2 from manu at gcc dot gnu dot org  2008-07-21 16:16
---
We need a complete testcase. I tried to reproduce this but GCC 4.4 with
-Wall
-Wextra -Wunused always says:

src/pr36708.c:5: warning: left-hand operand of comma expression has no
effect
src/pr36708.c:5: warning: statement with no effect

So this may be already fixed or your testcase is special. What flags are you
using?


-- 

manu at gcc dot gnu dot org changed:

   What|Removed |Added

 CC||manu at gcc dot gnu dot org
 Status|UNCONFIRMED |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36708

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36708