On Aug 9, 2:38 am, "Jim Langston" <tazmas...@rocketmail.com> wrote:
> "Victor Bazarov" <v.Abaza...@comAcast.net> wrote in message
> news:f9df7j$76v$1@news.datemas.de...
> > cheesi...@gmail.com wrote:
> >> 1. Can I declare some of template functions into a class? a concrete
> >> class, not the template class.

> > Yes, you should be able to.

> I didn't believe it,

You probably learned C++ a long time ago, then. You couldn't do
it in ARM C++; it was added by the standardization committee.

> so I tried it, and you're right, it does work. The
> output of the following program is
> 10 3.14159

> #include <iostream>

> class Foo
> {
> public:
> template <class T> T Bar( T t ) { return t; };
> };

> int main()
> {
> Foo MyFoo;
>
> std::cout << MyFoo.Bar<int>( 10 ) << " " << MyFoo.Bar<double>(
> 3.1415926 );
> return 0;

> }

> At first I couldn't understand how it could work, wouldn't
> there need to be an instance of the class for each type? Then
> I realized the compiler only has to make one copy of the
> method for each type. Interesting. Static variables (of type
> T anyway) don't seem to be saved between calls however.

They should be. Could you give an example? (Remember that a
function template is NOT a function. Each instantiation of a
function template is a function. So each instantiation will
have its own local static variables.)

--
James Kanze (GABI Software) email:james.kanze@gmail.com
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