Question

I need a template function which assigns a default value to the argument passed

template <class T> inline T GetDefault()
{
    return ???? # default value
}

T cand be bool, int, double and string.

Thank you.

Answer 1

Default value (even with basic types) should be default “constructor” :

template <class T> inline void SetDefault( T& value )
{
    value = T();
}

For example, int-based types will be 0 by default (because explicitely initialized).

This will obviously not work with types with no default value, like objects of class that don’t have a default constructor.