[Bug c++/53434] New: Compiler decides declaration/expression ambiguity too soon.

[Bug c++/53434] New: Compiler decides declaration/expression ambiguity too soon.

[james.kanze at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53434

             Bug #: 53434
           Summary: Compiler decides declaration/expression ambiguity too
                    soon.
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: james.kanze@gmail.com


Created attachment 27459
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27459
Source code for very simple program showing the bug.

This may be the same as 37213, but the context is somewhat different.  When I
compile (simply g++ -c <filename>), I get the following error message:

bugInGcc.cc: In function 'void f()':
bugInGcc.cc:20:39: error: size of array has non-integral type 'const char [2]'
bugInGcc.cc:20:39: error: 'parameter' declared as function returning an array

Apparently, g++ is deciding in favor of declaration after seeing C()["a"],
despite the fact that a declaration cannot be followed by a . operator.

[Bug c++/53434] Compiler decides declaration/expression ambiguity too soon.

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53434

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |rejects-valid
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2012-05-26
         Depends on|                            |29834
     Ever Confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-26 22:44:04 UTC ---
Most likely a dup of bug 29834 (well at least related to it).

[Bug c++/53434] Compiler decides declaration/expression ambiguity too soon.

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53434

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|2012-05-26 00:00:00         |2021-7-23

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Self contained testcase without include:
struct d
{
  d(const char*);
};
class S
{
public:
    d getString( d const& ) const;
};
class C
{
public:
    C();
    S const& operator[]( d const& ) const;
};
void
f()
{
    static d const s(C()["a"].getString("b"));
}