Article: Q122443
Product(s): Microsoft C Compiler
Version(s): 2.0
Operating System(s):
Keyword(s): kbbuglist kbfixlist
Last Modified: 23-JUL-2001
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The information in this article applies to:
- Microsoft C/C++ Compiler (CL.EXE), included with:
- *EDITOR Please do not choose this product*Microsoft Visual C++ 32-bit Edition* use 241, 265, 225, version 2.0
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SYMPTOMS
========
The C/C++ compiler incorrectly generates a C2664 error when attempting to
implicitly convert from a typedef non-constant array type to a constant array
type. The compiler reports an error that indicates a conversion from a constant
array type to a non-constant array type. The following error message is reported
by the compiler if a non-constant integer array type is used:
test.cpp(#): error C2664: 'copy' : cannot convert parameter 1 from 'const
int[2]' to 'int[2]'
The # is the line number where the error occured.
RESOLUTION
==========
To work around the problem, typedef a constant array type instead of using the
keyword 'const' together with the typedef non-constant array type. An example is
shown in the Sample Code section in this article.
STATUS
======
Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article. This bug was corrected in Microsoft Visual C++,
32-bit Edition, version 4.0.
MORE INFORMATION
================
Sample Code
-----------
/* Compile options needed: none
*/
/* -- test.cpp -- */
typedef int ARRAY[2];
typedef const int CONST_ARRAY[2];
void copy ( const ARRAY src, ARRAY dest );
void copy1( CONST_ARRAY src, ARRAY dest );
class CTest
{
private:
ARRAY pts[2];
public:
void operator=( const CTest& src );
};
void CTest :: operator=( const CTest& src )
{
for ( int i=0; i<2; i++ )
{
copy ( src.pts[i], pts[i] ); // Generates C2664
copy1( src.pts[i], pts[i] ); // Workaround
}
}
Additional query words: 2.00 9.00 buglist2.00
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Keywords : kbbuglist kbfixlist
Technology : kbVCsearch kbAudDeveloper kbCVCComp
Version : :2.0
Issue type : kbbug
Solution Type : kbfix
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