[code]
void test( const int a ){}
[/code]

Does that "const" make any difference at all? At the end, it is a scalar, and passed as value.

On Thursday, 4 June 2015 at 11:28:51 UTC, tcak wrote:
> [code]
> void test( const int a ){}
> [/code]
>
> Does that "const" make any difference at all? At the end, it is a scalar, and passed as value.

All it does is it makes the variable "a" const:
----
void test( const int a )
{
    a = 42; /* Error: cannot modify const expression a */
}
----

But the value is copied, yes. You can pass a mutable int in an immutable parameter and vice-versa.