[Bug c++/38485] New: possible regression: expected primary-expression at end of input

[Bug c++/38485] New: possible regression: expected primary-expression at end of input

[gcc at spatium dot org]

Compressed .ii file goes as attachment.

gcc 4.3.2: (reports no errors)

my gcc:

g++ -c kded_kephal_automoc.ii

In file included from
/src/a/kde/4.1.80/o/kdebase-workplace/libs/kephal/kded_kephal/moc_xmlconfigurations.cpp:11,
                 from
/src/a/kde/4.1.80/o/kdebase-workplace/libs/kephal/kded_kephal/kded_kephal_automoc.cpp:6:
/src/a/kde/4.1.80/o/kdebase-workplace/libs/kephal/kded_kephal/../../../../../kdebase-workspace-4.1.80/libs/kephal/configurations/xml/xmlconfigurations.h:104:
error: expected primary-expression at end of input

g++ -v

Using built-in specs.
Target: x86_64-unknown-linux-gnu
Configured with: ../svn/configure --prefix=/usr --enable-threads
--enable-shared --enable-languages=c,c++ --host=x86_64-unknown-linux-gnu
--with-system-zlib --with-x --enable-java-awt=gtk
--enable-targets=x86_64-unknown-linux-gnu --with-arch=athlon64
--with-tune=athlon64 --with-cpu=athlon64 --disable-multilib
--enable-__cxa_atexit --enable-libada --enable-gtk-cairo
--enable-libgcj-multifile --with-long-double-128 --disable-nls
Thread model: posix
gcc version 4.4.0 20081211 (experimental) (GCC) 

The problem is at line 9355 of the .ii: (comment it out and it works)

void translateToOther(QMap<int, QRect> & layout, Output * base, QMap
<int, int> match = (QMap<int, int>()));

...and from what I could figure out, it is the right-side of the '=' default
parameter assignment.

>From my understanding, the code sould be equivalent to this small test case:

template <typename T1, typename T2> class blah {
        T1 whatever1;
        T2 whatever2;
        public:
        inline blah() {}
        inline T1 get1() { return whatever1; }
};

int foo(blah <int, int> bar = (blah <int, int> ())) {
        return bar.get1();
}

int main(void) {
        return foo();
}

However, this code compiles and runs perfectly on my gcc.


-- 
           Summary: possible regression: expected primary-expression at end
                    of input
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: gcc at spatium dot org
  GCC host triplet: x86_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] possible regression: expected primary-expression at end of input

[gcc at spatium dot org]

------- Comment #1 from gcc at spatium dot org  2008-12-11 12:35 -------
Created an attachment (id=16883)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=16883&action=view)
the faulty .ii file


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] possible regression: expected primary-expression at end of input

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2008-12-12 00:28 -------
Reduced testcase:

template <class Key, class T>
class QMap { };

class XMLConfigurations {
  void translateToOther(QMap<int, int> match = (QMap<int, int>()));
};


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] possible regression: expected primary-expression at end of input

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2008-12-12 00:29 -------
Related to PR 57, one of the oldest GCC bugs which are still opened (there is a
defect report against the C++ standard and that is why it is still opened).


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] [4.4 Regression] GCC can't parse a parenthesized comma in a template-id within a default argument

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2008-12-12 00:31 -------
Jason since you changed this area for 4.4, do you know if this is valid code or
not?  Comment #2 contains the reduced testcase.

Thanks,
Andrew Pinski


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jason at gcc dot gnu dot org
   GCC host triplet|x86_64-unknown-linux-gnu    |
            Summary|possible regression:        |[4.4 Regression] GCC can't
                   |expected primary-expression |parse a parenthesized comma
                   |at end of input             |in a template-id within a
                   |                            |default argument
   Target Milestone|---                         |4.4.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] [4.4 Regression] GCC can't parse a parenthesized comma in a template-id within a default argument

[jason at gcc dot gnu dot org]

-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|unassigned at gcc dot gnu   |jason at gcc dot gnu dot org
                   |dot org                     |
             Status|UNCONFIRMED                 |ASSIGNED
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2008-12-12 06:54:50
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] [4.4 Regression] GCC can't parse a parenthesized comma in a template-id within a default argument

[jason at gcc dot gnu dot org]

------- Comment #5 from jason at gcc dot gnu dot org  2008-12-12 06:55 -------
I think this testcase is clearly valid.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] [4.4 Regression] GCC can't parse a parenthesized comma in a template-id within a default argument

[jason at gcc dot gnu dot org]

------- Comment #6 from jason at gcc dot gnu dot org  2008-12-18 15:55 -------
Fixed.


-- 

jason at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485

[Bug c++/38485] [4.4 Regression] GCC can't parse a parenthesized comma in a template-id within a default argument

[jason at gcc dot gnu dot org]

------- Comment #7 from jason at gcc dot gnu dot org  2008-12-18 15:56 -------
Subject: Bug 38485

Author: jason
Date: Thu Dec 18 15:54:59 2008
New Revision: 142815

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=142815
Log:
        PR c++/38485
        * parser.c (cp_parser_token_starts_cast_expression): An EOF
        can't start a cast-expression.

Added:
    trunk/gcc/testsuite/g++.dg/parse/defarg13.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/parser.c
    trunk/gcc/testsuite/ChangeLog


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38485