Re: static const char* data member

From:

tohava <tohava@gmail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

Tue, 8 Sep 2009 08:14:16 CST

Message-ID:

<16a767d3-0f67-4a20-889e-32dfaafeab40@y21g2000yqn.googlegroups.com>

This can be done, inside a .h, you should have:
class header_only {
static const char * x;
};

and inside a single .cpp:
static const char *header_only::x = "adfasdfasdf";

Regarding your second question, While I am not sure what is the
rational, I would guess that C++ tries to move away from C's
compilation-unit based encapsulation into a more class based
encapsulation. Allowing what you asked could cause

On Sep 7, 1:35 pm, "Martin T." <0xCDCDC...@gmx.at> wrote:

Hi all!

I hit the following annoying situation with Visual Studio 2005:

file: header_only.hpp

// a) C2864 - only const integral data members can be initialized within
a class
class header_only {
   static const char *const sss = "xyz";
   // ...

};

// b) LNK2005: "..." already defined in test.obj
class header_only {
   static const char *const sss; = "xyz";
   // ...};

const char *const header_only::sss = "xyz";

// c) this works
const char *const header_only_sss = "xyz";
class header_only {
   // ...

};

Is there no way of making a simple char* pointer constant a header
defined class member?

And: What's the rationale of allowing multiple definition of global
const objects but not so for static const class members?

cheers,
Martin

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