[Bug c++/16093] New: Bad error messages for missing declarations.

[Bug c++/16093] New: Bad error messages for missing declarations.

[carlo at gcc dot gnu dot org]

When a declaration is missing, the error returned by the compiler
is too confusing.  Consider the following short test case;

namespace n {
  int var;
  //class foo { };
  //template<typename T> class bar { };
}

n::var x1;
n::foo x3;
n::bar<int> x4;


The results in the following errors:

test.cc:7: error: `var' in namespace `n' does not name a type
test.cc:8: error: `foo' in namespace `n' does not name a type
test.cc:9: error: expected constructor, destructor, or type conversion before
'<' token
test.cc:9: error: expected `,' or `;' before '<' token

I'd like to suggest a different error for the case that there is
no declaration at all (this could be tested after it is already
detected that there is an error because foo is not a type):

test.cc:8: error: `foo' in namespace `n' is not declared

And of course, an improvement for templates.  For example:

test.cc:9: error: `bar' in namespace `n' is not declared

-- 
           Summary: Bad error messages for missing declarations.
           Product: gcc
           Version: 3.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: carlo at gcc dot gnu dot org
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16093

[Bug c++/16093] Bad error messages for missing declarations.

[carlo at gcc dot gnu dot org]

------- Additional Comments From carlo at gcc dot gnu dot org  2004-06-20 11:09 -------
On second thought, make that:

test.cc:8: error: `n::foo' has not been declared
test.cc:9: error: `n::bar` has not been declared

This is the same format that one gets when doing

using n::foo;

Note that the full namespace should be used - and not
what is literally in the source.  Consider:

namespace n1 {
  namespace n2 {
  }
}
namespace n3 { 
  namespace n2 {
    class foo { };
  }
}

using namespace n1;
n2::foo x;

Then one wants: error: `n1::n2::foo' has not been declared


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16093

[Bug c++/16093] Bad error messages for missing declarations.

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2004-06-25 22:58 -------
Confirmed, there might be another bug with the same problem.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |diagnostic
   Last reconfirmed|0000-00-00 00:00:00         |2004-06-25 22:58:22
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16093