Struct problem

Question

I have a problem creating a struct using VC6:

struct A {

A();

~A();

A(const A& s);                            // line X

A& operator=(const A& s);                 // line Y

const A& operator=(const char* str);

const A& operator=(const wchar_t* str);

};

First I have compiled it with no problems in a small console application.

After that, I have tried to put it together with my big MFC application and it does not compile!! The errors I get are:

(X) error C2629: unexpected 'struct A ('

(X) error C2238: unexpected token(s) preceding ';'

(Y) error C2143: syntax error : missing ')' before 'constant'

(Y) error C2143: syntax error : missing ';' before 'constant'

(Y) error C2059: syntax error : 'constant'

(Y) error C2059: syntax error : ')'

(Y) error C2238: unexpected token(s) preceding ';'

Does anybody know what's happening?


Thanks in advance,

Answer 1

There is nothing wrong with the struct definition you have shown.

If it compiles in a simple project but not in your MFC project the fault must lie elsewhere. Presumably this struct definition is in a header. Perhaps there is an error in another header included before it.

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David Wilkinson | Visual C++ MVP

Answer 2

Yes, the struct definition is in a header, but I don't think there's a problem in any previous header because when I delete the line including my header, the project compiles and works fine.

More information: this struct is defined inside a namespace.

Answer 3

Then maybe you need to show the entire header file. The code you have shown compiles for me.

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David Wilkinson | Visual C++ MVP

Answer 4

I experience the problem with the header file of this project (VC6 version):

http://www.codeproject.com/KB/office/BasicExcel/BasicExcel_src.zip

Answer 5

Double check the headers included by this header and make sure you haven't the semicolon off of the closing brace from a class or struct definition.  That's most often the cause of strange errors like these.

Answer 6

If the headers weren't ok it would have not compiled in my console project. I have not done any modification to that files.

Answer 7

Whne you get these compile errors, you must be compiling some implementation (.cpp file) that #include's your header containing the struct. The problem must be in something #include'd before that file.

If you doubt this, try creating a new empty .cpp file and putting just the #include's in it. Presumably, you will get the error. Try commenting out the other #include's one at a time until the problem goes away.

Basically, the technique here is to simplify the problem until the error either goes away or the cause becomes obvious.

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David Wilkinson | Visual C++ MVP

Answer 8

I have changed the order of the includes and now it works. I hope someday I could understand why.

Anyway, thanks to all.

Answer 9

txandi:

When successful compilation depends on order of #include's, it indicates that one of the headers should actually have #included the other, or possibly that one or more of your headers is missing #include guards (or #pragma once).

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David Wilkinson | Visual C++ MVP