Article View: comp.std.c++
Article #3997Ambiguity when overloading operators
From: Martin Aupperle
Date: Thu, 11 Apr 1996 23:50
Date: Thu, 11 Apr 1996 23:50
35 lines
1483 bytes
1483 bytes
If I define
struct X {
X( int );
operator const char* () const;
/* other members */
};
X& operator + ( const X&, const X& );
I cannot say
X x1( 5 );
X x2 = x1+3; // ambiguous
Borland BC4.5 says that x1+3 is ambiguous. I know that it can
1. convert 3 to an X and call operator + ( const X&, constX& )
2. convert x1 to a const char* and do pointer arithmetics.
Is the compiler right? I have in mind that a conversion towards a user defined
type has precedence over the conversion to a fundamental type. So choice (1)
should be right and it shoud not be ambiguous.
Am I correct?
Martin
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Path: arc1-ca.pugleaf.net!engnews1.Eng.Sun.COM!taumet!clamage From: Martin Aupperle <100754.2730@CompuServe.COM> Newsgroups: comp.std.c++ Subject: Ambiguity when overloading operators Date: 11 Apr 1996 23:50:24 GMT Organization: ? Approved: clamage@eng.sun.com (comp.std.c++) Message-ID: <960411233436_100754.2730_GHV68-1@CompuServe.COM> NNTP-Posting-Host: taumet.eng.sun.com Content-Length: 629 X-Lines: 31 Originator: clamage@taumet