[Bug c++/13308] New: C++ operator ambiguity error

[Bug c++/13308] New: C++ operator ambiguity error

[alexander dot gdalevich at dvtsensors dot com]

I've been trying to compile a file on a i686-pc-cygwin host using sh-elf cross 
compiler version 3.3.2.  

Compiler build configuration options:
------------------------------------------
Configured with: ../gcc-3.3.2/configure --target=sh-elf --prefix=/gcc_build/sh4
--enable-languages=c,c++ --with-newlib --program-prefix=sh-elf- --disable-thread
s --with-gxx-include-dir=/gcc_build/sh4/sh-elf/include -v
Thread model: single
gcc version 3.3.2


Command line that causes the problem:
------------------------------------------
$ sh-elf-gcc -v -save-temps -Wall -fno-exceptions -fno-rtti \
-fno-implicit-templates -m4 -mb -fno-delayed-branch -O2 \
-fomit-frame-pointer -c test_class.cpp

Problem:
------------------------------------------
test_class.cpp: In function `int whatever(CDSPString*, int)':
test_class.cpp:53: error: ISO C++ says that `CDSPString operator+(const char*,
   const CDSPString&)' and `operator+' are ambiguous even though the worst
   conversion for the former is better than the worst conversion for the latter

-- 
           Summary: C++ operator ambiguity error
           Product: gcc
           Version: 3.3.2
            Status: UNCONFIRMED
          Severity: minor
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: alexander dot gdalevich at dvtsensors dot com
                CC: gcc-bugs at gcc dot gnu dot org
  GCC host triplet: i686-pc-cygwin
GCC target triplet: sh-*-elf


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13308

[Bug c++/13308] C++ operator ambiguity error

[alexander dot gdalevich at dvtsensors dot com]

------- Additional Comments From alexander dot gdalevich at dvtsensors dot com  2003-12-05 00:11 -------
Created an attachment (id=5276)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=5276&action=view)
source and preprocessed (.ii) file


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13308

[Bug c++/13308] C++ operator ambiguity error

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2003-12-05 00:19 -------
Here is the warning I get on the mainline (yes the warning is fixed already):
test_class.cpp: In function `int whatever(CDSPString*, int)':
test_class.cpp:53: error: ISO C++ says that these are ambiguous, even though the worst 
conversion for the first is better than the worst conversion for the second:
test_class.cpp:29: note: candidate 1: CDSPString operator+(const char*, const CDSPString&)
test_class.cpp:53: note: candidate 2: operator+(char*, int) <built-in>

The problem is that bool can and will be converted into an int.
One thing you can do is add a constructor for char* and then have the operator+ be const 
CDSPString&, const CDSPString&.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13308