[Bug c++/20140] New: template function complains about "char-array initialized from wide string"

[Bug c++/20140] New: template function complains about "char-array initialized from wide string"

[rwxr-xr-x at gmx dot de]

Hello,

this is my code:

template<typename T> void foo() {
    unsigned char s[] = "";
    (void)s;
}

int main() {
    /* removing either of the calls below makes the error disappear */
    foo<int>();
    foo<char>();
}

Compiling this program with g++[0] results in
try.cc: In function `void foo() [with T = char]':
try.cc:9:   instantiated from here
try.cc:2: error: char-array initialized from wide string

I think this is wrong because "" isn't a wide string. The error disappears
when I remove "unsigned" from the declaration of s, or when only a single
foo<T> is instantiated. The actual types don't matter; my original code
used function pointers.

HTH, Lukas
[0] g++ versions:
Reading specs from /usr/local/lib/gcc/i686-pc-linux-gnu/3.4.3/specs
Configured with: ../gcc-3.4.3/configure --with-cpu=i686 --with-arch=i686 --with-tune=i686 --enable-__cxa_atexit
Thread model: posix
gcc version 3.4.3

Reading specs from /usr/local/dist/bin/../lib/gcc-lib/sparc-sun-solaris2.8/3.2.2/specs
Configured with: /compilefs/usr.local.compile/dist/fenk/gcc-3.2.2/configure --prefix=/usr/local/dist/DIR/GNU/gcc-3.2.2 --with-gnu-as --with-as=/usr/local/dist/DIR/GNU/binutils/bin/as --with-gnu-ld --with-ld=/usr/local/dist/DIR/GNU/binutils/bin/ld --with-dwarf2 --disable-multilib --with-local-prefix=/usr/local/dist
Thread model: posix
gcc version 3.2.2

-- 
           Summary: template function complains about "char-array
                    initialized from wide string"
           Product: gcc
           Version: 3.4.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rwxr-xr-x at gmx dot de
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20140

[Bug c++/20140] template function complains about "char-array initialized from wide string"

[reichelt at gcc dot gnu dot org]

------- Additional Comments From reichelt at gcc dot gnu dot org  2005-02-22 12:56 -------
Confirmed.
This fails since gcc 2.95.3 or earlier.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |reichelt at gcc dot gnu dot
                   |                            |org
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|                            |1
           Keywords|                            |monitored, rejects-valid
   Last reconfirmed|0000-00-00 00:00:00         |2005-02-22 12:56:16
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20140

[Bug c++/20140] template function complains about "char-array initialized from wide string"

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20140

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|---                         |4.7.0

--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-01-02 16:16:52 UTC ---
Fixed for 4.7.0.

[Bug c++/20140] template function complains about "char-array initialized from wide string"

[paolo at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20140

--- Comment #4 from paolo at gcc dot gnu.org <paolo at gcc dot gnu.org> 2012-01-02 16:15:55 UTC ---
Author: paolo
Date: Mon Jan  2 16:15:49 2012
New Revision: 182805

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182805
Log:
/cp
2012-01-02  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/20140
    * typeck2.c (digest_init_r): Use copy_init when initializing
    an array of chars.

/testsuite
2012-01-02  Paolo Carlini  <paolo.carlini@oracle.com>

    PR c++/20140
    * g++.dg/template/init9.C: New.


Added:
    trunk/gcc/testsuite/g++.dg/template/init9.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/typeck2.c
    trunk/gcc/testsuite/ChangeLog

[Bug c++/20140] template function complains about "char-array initialized from wide string"

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20140

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> 2012-01-02 00:42:34 UTC ---
On it. I see what's going wrong, fixing it should be relatively easy.

[Bug c++/20140] template function complains about "char-array initialized from wide string"

[rwxr-xr-x at gmx dot de]

------- Comment #2 from rwxr-xr-x at gmx dot de  2008-03-13 09:28 -------
Heh, this "new" bug still exists in 4.3.0.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20140