🚀 go-pugleaf

st@mlc-ratingen.de writes:
	...
>> Note that you still need a definition of X::fifty somewhere:
>> 
>> 	int X::fifty;

>This one has always puzzled me. What is the rationale behind *still* 
>requiring that X::fifty be defined somewhere if it is initialized in
>the class declaration?

Suppose the program, in various different source files, takes the address
&X::fifty, and saves it in int* variables; then, at some later points,
those variables are compared for equality of their contents.  We want
to ensure that such equality holds.  That the _contents_ of X::fifty
are defined in the header seen by each such source file has obviously
no relevance to this -- the _location_ of it must also be defined,
and, clearly, it will have to be in exactly one place to guarantee
the equality holds...


Alex
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