Article: Q242190
Product(s): Microsoft C Compiler
Version(s): winnt:5.0,6.0
Operating System(s):
Keyword(s): kbCompiler kbCPPonly kbLangCPP kbVC kbVC500 kbVC500bug kbVC600 kbVC600bug
Last Modified: 03-MAY-2001
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The information in this article applies to:
- The C/C++ Compiler (CL.EXE), included with:
- Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0
- Microsoft Visual C++, 32-bit Professional Edition, version 5.0
- Microsoft Visual C++, 32-bit Enterprise Edition, version 6.0
- Microsoft Visual C++, 32-bit Professional Edition, version 6.0
- Microsoft Visual C++, 32-bit Learning Edition, version 6.0
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SYMPTOMS
========
Argument-dependent name lookup, also known as Koenig lookup, works only for
operators and not regular functions in a namespace.
CAUSE
=====
The compiler does not fully support argument-dependent name lookup as specified
in the C++ Standard. Please refer to the C++ Standard, section 3.4.2, for
information on argument-dependent name lookup.
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.
MORE INFORMATION
================
Steps to Reproduce Behavior:
The following code example demonstrates the error:
//test.cpp
// compiler option needed:/GX
#include <iostream>
namespace N1 {
struct T1 {
};
void g(T1) {
}
T1 operator+( T1 x, T1 y) {
std::cout<< "In N1::+" <<std::endl;
return y;
}
}
int main() {
N1::T1 t1 ,t2;
g(t1); // error C2065: 'g' : undeclared identifier
t1 + t2; // works fine calls N1::operator+
return 0;
}
Additional query words:
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Keywords : kbCompiler kbCPPonly kbLangCPP kbVC kbVC500 kbVC500bug kbVC600 kbVC600bug
Technology : kbVCsearch kbAudDeveloper kbCVCComp
Version : winnt:5.0,6.0
Issue type : kbbug
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