template inside a tempate

[viliml]

It there any difference between, for example

template </*something*/>
template</*something else*/>
/* your function or class that uses those templates*/

and

template </*something*/, /*something else*/>
/* your function or class that uses those templates*/

except that the latter is nicer and easyer to use?

[guestgulkan]

If by your first method you mean something like this

template <typename T>
template <typename W>
void function_abc( T t,  W w)
{
    
}

then that is an error

So it is not the same as this (which is ok)

template <typename T, typename W>
void function_abc( T t,  W w)
{
    
}

or the same as this which is also ok (two template list for two different things)

template <typename T>
struct AStruct 
{
    template <typename W>
    void AStructTemplateFunction( W w);
};

template <typename T>
template <typename W>
void AStruct <T>::AStructTemplateFunction( W w)
{

}