g++ release 4.1.1 compiles the following invalid code without detecting an
error.
It does correctly find the error with -pedantic. Interestingly (perhaps), it
also correctly detects the ambiguous call where the argument involved is const
- as demonstrated by the second compilation below with the macro C2 defined:
[EMAIL PROTECTED]:~/c++/compiler$ g++ -c conversion.ambig.c
[EMAIL PROTECTED]:~/c++/compiler$ cat conversion.ambig.c
class Source;
class Destination
{
public:
Destination() {}
Destination (const Source& source) {}
};
class Source
{
public:
Source() {}
operator Destination() const { return Destination();}
};
Source source;
Destination wolf = source; // ambiguous
#ifdef C2
const Source source2;
Destination wolf2 = source2; // ambiguous
#endif
[EMAIL PROTECTED]:~/c++/compiler$ g++ -D C2 conversion.ambig.c
conversion.ambig.c:22: error: conversion from 'const Source' to 'Destination'
is ambiguous
conversion.ambig.c:14: note: candidates are: Source::operator Destination()
const
conversion.ambig.c:7: note: Destination::Destination(const
Source&)
[EMAIL PROTECTED]:~/c++/compiler$
[EMAIL PROTECTED]:~/c++/compiler$
[EMAIL PROTECTED]:~/c++/compiler$ gcc -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: /home/sjh/gcc/gcc-4.1.1/configure
--prefix=/home/sjh/gcc/prefix/ --enable-languages=c,c++
Thread model: posix
gcc version 4.1.1
[EMAIL PROTECTED]:~/c++/compiler$
--
Summary: accepts-invalid ambiguous between conversion
function/constructor. related to const
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: greifel at megatop200 dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29188
