Re: template export in dll

"Alex Blekhman" <>
Sat, 13 Sep 2008 16:16:37 +0300
"guy" wrote:

Be aware it's not my intention to instantiate this class in the
DLL I just want to export the code.
What can I do to solve this issue ? Or is it not possible to
export template classes like that ?

You're doing a classic mistake by assuming that template class is
a code. Templates are not a code. Templates become code when they
are instantiated with some type. Before that compiler is not event
required to check that templates are syntactically correct (though
most compilers do some checks anyway).

Basically, according to the C++ Standard templates support two
cmpilation models:

a) inclusion (when the whole definition of a template is in header
file and included in compilable .CPP unit);

b) separate compilation model (when template is declared with
`export' keyword in .H file and implemented in separate .CPP

Currently, there is the only one compiler in the world that
supports separate compilation model - Comeau C/C++ Compiler
front-end. All other compilers support only inclusion model.

You can read more about it here:

"[35.12] Why can't I separate the definition of my templates class
from it's declaration and put it inside a .cpp file?"


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