Re: [boost] Generating unique identifiers at compile-time

From: Sid Sacek (ssacek_at_[hidden])
Date: 2007-12-04 14:22:06

>> That's because you cannot instantiate a class template with a string in C++.

Actually you can, but are limited to strings with external linkage. Another problem with this aspect of templates is that not all
compilers support this syntax yet.

-Sid Sacek

#include <stdio.h>

template< const char * name >
class foo
{
        const char * val;
public:
        foo() : val( name ) { }
        const char * value( void ) {  return val; }
};

extern const char exname[] = "hello world";

int main( int, char ** )
{
        foo< exname >  myfoo;
        printf( " %s \n", myfoo.value() );
}