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From "Martin Sebor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (STDCXX-282) [MSVC 8.0] bogus ambiguity on overloaded template conversion operator
Date Fri, 01 Sep 2006 18:30:27 GMT
    [ http://issues.apache.org/jira/browse/STDCXX-282?page=comments#action_12432199 ] 
            
Martin Sebor commented on STDCXX-282:
-------------------------------------

Filed here: https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=191926

> [MSVC 8.0] bogus ambiguity on overloaded template conversion operator
> ---------------------------------------------------------------------
>
>                 Key: STDCXX-282
>                 URL: http://issues.apache.org/jira/browse/STDCXX-282
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: External
>         Environment: MSVC 7.0, 7.1, 8.0
>            Reporter: Martin Sebor
>
> The well-formed program below fails to compile with all recent versions of MSVC, including
8.0:
> $ cat t.cpp && cl t.cpp
> struct S {
>     int x;
>     template <class T> operator T& () { return (T&)x; }
>     template <class T> operator T () const {
>         return static_cast<T&>(*const_cast<S*>(this));
>     }
> };
> int main ()
> {
>     S s = { 0 };
>     return int (s);
> }
> Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.42 for 80x86
> Copyright (C) Microsoft Corporation.  All rights reserved.
> t.cpp
> t.cpp(16) : error C2440: '<function-style-cast>' : cannot convert from 'S' to 'int'
>         No user-defined-conversion operator available that can perform this conversion,
or the operator cannot be called

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