static template initialization pb

static template initialization pb

[neal]

I believe the current standard should allow initialization in the
declaration, so this should work:

template<class T>
struct X {
  static T c = 0;
};

//template<class T> T X<T>::c = 0;

X<int> W;

#include <iostream.h>

main () {
  cout << W.c << endl;
}
-----------------------

Here's what happens with 971127 (linux):

g++ -o Test2 Test2.cc
/tmp/cca002091.o: In function `main':
/tmp/cca002091.o(.text+0x9): undefined reference to `X<int>::c'
collect2: ld returned 1 exit status

Re: static template initialization pb

[Alexandre Oliva]

  writes:

> I believe the current standard should allow initialization in the
> declaration, so this should work:

But this only works for integral types, and definition outside the
class body is still mandatory unless you define a constant.  In this
case, the definition must not contain an initialization:

template<class T> T X<T>::c; // = 0;

-- 
Alexandre Oliva
mailto:oliva@dcc.unicamp.br mailto:aoliva@acm.org
http://www.dcc.unicamp.br/~oliva
Universidade Estadual de Campinas, SP, Brasil