[Bug c++/52962] New: Column number incorrect in error

[Bug c++/52962] New: Column number incorrect in error

[xinliangli at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52962

             Bug #: 52962
           Summary: Column number incorrect in error
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: xinliangli@gmail.com


#define M1(x, y, z) y();
#define M2(x, y, z) M1(x, y, z)
void test() {
  M2(a, b, c);
}

/* ===== Clang

macros1.cpp:4:9: error: use of undeclared identifier 'b'
 M2(a, b, c);
       ^
macros1.cpp:2:27: note: expanded from macro 'M2'
#define M2(x, y, z) M1(x, y, z)
                         ^
macros1.cpp:1:21: note: expanded from macro 'M1'
#define M1(x, y, z) y();
                   ^
1 error generated.

================ */

[Bug c++/52962] Column number incorrect in error

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52962

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-04-12 23:06:20 UTC ---
That requires tracking of macros.

[Bug c++/52962] Column number incorrect in error

[manu at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52962

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |manu at gcc dot gnu.org

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> 2012-04-12 23:19:17 UTC ---
manuel@gcc12:~$ ~/trunk/186353M/build/gcc/cc1plus -ftrack-macro-expansion
pr52962.cc 
pr52962.cc:1:23: error: ‘b’ was not declared in this scope
 #define M1(x, y, z) y();
                       ^
pr52962.cc:1:23: note: in expansion of macro 'M1'
 #define M1(x, y, z) y();
                       ^
pr52962.cc:2:21: note: expanded from here
 #define M2(x, y, z) M1(x, y, z)
                     ^
pr52962.cc:2:21: note: in expansion of macro 'M2'
 #define M2(x, y, z) M1(x, y, z)
                     ^
pr52962.cc:4:3: note: expanded from here
   M2(a, b, c);
   ^

OK, it needs a bit of fine-tuning, but it is much closer. Nice, eh? ;-)

[Bug c++/52962] Column number incorrect in error

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52962

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic, easyhack
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2015-03-28
     Ever confirmed|0                           |1

--- Comment #3 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This has improved a lot, but it is still better in C than in C++:

manuel@gcc14:~/test2/221743M/build/gcc$ ~/test1/221745M/build/gcc/cc1 ~/test.c
/home/manuel/test.c:4:9: warning: implicit declaration of function ‘b’
[-Wimplicit-function-declaration]
   M2(a, b, c);
         ^
/home/manuel/test.c:1:21: note: in definition of macro ‘M1’
 #define M1(x, y, z) y();
                     ^
/home/manuel/test.c:4:3: note: in expansion of macro ‘M2’
   M2(a, b, c);
   ^
manuel@gcc14:~/test2/221743M/build/gcc$ ~/test1/221745M/build/gcc/cc1plus
~/test.c
 void test()
/home/manuel/test.c:1:23: error: ‘b’ was not declared in this scope
 #define M1(x, y, z) y();
                       ^
/home/manuel/test.c:2:21: note: in expansion of macro ‘M1’
 #define M2(x, y, z) M1(x, y, z)
                     ^
/home/manuel/test.c:4:3: note: in expansion of macro ‘M2’
   M2(a, b, c);
   ^
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Subject: [Bug c++/17729] [4.8/4.9/5 Regression] Duplicate __attribute__((deprecated)) warning
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=17729

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |patch
           Assignee|unassigned at gcc dot gnu.org      |ktietz at gcc dot gnu.org

--- Comment #33 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Kai, what happened with your patch?
>From gcc-bugs-return-482158-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Sat Mar 28 22:31:08 2015
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65445

Manuel López-Ibáñez <manu at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |easyhack

--- Comment #2 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
This should not be too difficult for someone willing to learn the basics of
awk. I have hacked the scripts a lot and all the awk I know I learnt from the
scripts themselves.
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Subject: [Bug c++/64181] 'noexcept' on a lambda sometimes appears to get optimised away at -O2 (or above).
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd181

--- Comment #1 from Roger Orr <rogero at howzatt dot demon.co.uk> ---
The optimization is also broken in the 5.0 head (5.0.0.20150328)

[Bug c++/52962] Column number incorrect in error

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52962

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|---                         |7.0

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Fixed in GCC 7+ by r7-4797.