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Date: Sun, 29 Aug 2004 11:27:00 -0000
From: "igodard at pacbell dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Message-ID: <20040829112727.17225.igodard@pacbell.net>
Reply-To: gcc-bugzilla@gcc.gnu.org
Subject: [Bug c++/17225] New: Trsolver picks universal template over user-defined conversion
X-Bugzilla-Reason: CC
X-SW-Source: 2004-08/txt/msg02961.txt.bz2
List-Id: <gcc-bugs.sourceware.org>

I'm not sure this is a bug or just my ignorance of the rules.
#include <iostream>
struct R{};
struct S{};
struct T{
    operator R() {return e;}
    operator S() {return f;}
    R e;
    S f;
    };

void Bar(R r) { std::cerr << "Bar\n"; }
void Foo(S s) { std::cerr << "Foo direct\n";}
template<typename U>
void Foo(U u) { std::cerr << "Foo template\n"; }
int main() {
    T t;
    S s;
    Bar(t);
    Foo(s);
    Foo(t);
    }

gets you:

~/ootbc/common/test/src$ a.out
Bar
Foo direct
Foo template

That is, it takes exact match over universal template, and universal template over user-defined conversion. Is this right>

Ivan

-- 
           Summary: Trsolver picks universal template over user-defined
                    conversion
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: igodard at pacbell dot net
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17225