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Which #include(s) are necessary for CMap

Posted on 2010-08-27
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Last Modified: 2013-11-20
Dear all,

i encounter the following problem.

As specified in the documentation for CMap, i do include the following:

	#include "afxtempl.h"

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Using

	CMap<CString*, CString*, int, int> map;

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everything works as expected, but if i specify the number of elements for the constructor like

	CMap<CString*, CString*, int, int> map(16);

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i receive three times a compilation error.

      error C2059: syntax error : 'constant'

It seems to me, that some other #include is missing.

Any ideas?

Best regards
sahl04
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Question by:sahl04
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Expert Comment

by:AndyAinscow
ID: 33540246
Compiler Error C2059
Error Message syntax error : 'token'
 
The token caused a syntax error.
To determine the cause, examine not only the line listed in the error  message, but also the lines above it. The following example generates an error  message for the line declaring j, but the true  source of the error appears on the line just above it.
If examining the lines yields no clue to what the problem might be, try  commenting out the line listed in the error message and possibly several lines  above it.
If the error message occurs on a symbol immediately following a  typedef variable, check that the variable is defined in the source  code.
You may get C2059 if a symbol evaluates to nothing, as can occur when you  compile with /Dsymbol=.
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Expert Comment

by:AndyAinscow
ID: 33540273
ps.       the following line compiles without error message here.

 CMap<CString*, CString*, int, int> map(16);

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Accepted Solution

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Zoppo earned 500 total points
ID: 33540384
Hi sahl04,

do you use this in a class declaration? If so this isn't possible, i.e.:

> class CTest
> {
>   CMap < CString*, CString*, int, int > map1; // OK
>   CMap < CString*, CString*, int, int > map2( 16 ); // Error C2059
> };

To initialize such a member you need to add it's constructor call to the classes constructors initialization list, i.e.:

> class CTest
> {
>   CMap < CString*, CString*, int, int > map1; // OK
>   CMap < CString*, CString*, int, int > map2; // Error C2059
> public:
>  CTest();
> };
>
> CTest::CTest()
> : map2( 16 )
> {
> }

Hope that helps,

ZOPPO
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LVL 31

Expert Comment

by:Zoppo
ID: 33540387
Sorry, I forgot to delete the 'Error C2059' comment in the second sample ... just ignore it.
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