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Daveed Vandevoorde
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 Posted: Tue Jul 22, 2003 10:56 pm Post subject: Re: Multiple explicit instantiations? |
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[email]dsp (AT) bdal (DOT) de[/email] (Daniel Spangenberg) wrote:> Our Holy Standard claims in 14.7.2/4:
| Quote: |
"The definition of a non-exported function template, a non-exported
member
function template, or a non-exported member function or static data
member
of a class template shall be present in every translation unit in which
it is
explicitly instantiated."
I am wondering concerning this description,because it seems to imply,
that more than one explicit instantiation for the same class (function, ...)
in> the program are OK.
[...] |
Not really. It just takes into account the fact that a same _template_
(or member thereof) can be instantiated in multiple translation units.
For example:
// TU1:
template<typename T> void f() {}
template void f<void>;
// TU2:
template<typename T> void f() {}
template void f<int*>;
These are fine. But the following:
// TU3:
template<typename T> void f();
template void f<bool>; // Error: missing definition of f.
is not.
Daveed
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