[Bug c++/25751] New: Poor error when templating on undefined types

[Bug c++/25751] New: Poor error when templating on undefined types

[chris at bubblescope dot net]

#include <vector>

int main(void)
{
  std::vector<foo> v;
  v.begin();
}

Produces:

temp.cc: In function 'int main()':
temp.cc:5: error: 'foo' was not declared in this scope
temp.cc:5: error: template argument 1 is invalid
temp.cc:5: error: template argument 2 is invalid
temp.cc:5: error: invalid type in declaration before ';' token
temp.cc:6: error: request for member 'begin' in 'v', which is of non-class type
'int'

That last warning doesn't seem to make any sense. Perhaps g++ should abandon
parsing / producing errors earlier?


-- 
           Summary: Poor error when templating on undefined types
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: chris at bubblescope dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25751

[Bug c++/25751] Poor error when templating on undefined types

[pinskia at gcc dot gnu dot org]

------- Comment #1 from pinskia at gcc dot gnu dot org  2006-02-02 19:47 -------
Confirmed.

What should happen here is that when foo is not declared in this context, we
should try to figure out if it was going to be used as a type or a variable. 
Right now we assume it is used as a variable.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2006-02-02 19:47:04
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25751

[Bug c++/25751] Poor error when templating on undefined types

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=25751

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
template<class> struct gg{};
int main(void)
{
  gg<t> v;
  v.begin();
}

[Bug c++/25751] Poor error when templating on undefined types

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25751

Paolo Carlini <paolo.carlini at oracle dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
                 CC|gcc-bugs at gcc dot gnu.org |
         AssignedTo|unassigned at gcc dot       |paolo.carlini at oracle dot
                   |gnu.org                     |com

--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-24 15:25:35 UTC ---
Let's see if we can make some progress.

[Bug c++/25751] Poor error when templating on undefined types

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25751

Paolo Carlini <paolo.carlini at oracle dot com> changed:

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

--- Comment #2 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-05-24 15:22:08 UTC ---
*** Bug 53412 has been marked as a duplicate of this bug. ***