On Tuesday, 24 July 2012 at 03:25:55 UTC, ReneSac wrote:
Do I really have to duplicate the function, in order to achieve
this?
In a nutshell, yes. Or else resort to bizarre sorcery such as
may rot the very heart from one's chest (or template ninjitsu,
whatever). But is it really so bad?
bool foo ( byte[] data, out int stats ) {
// do a bunch of stuff
}
bool foo ( byte[] data ) {
int dummy;
return foo( data, dummy );
}
One could possibly put together a template that automates this...
heck, here's a quick and dirty implementation of such:
##############################
import std.stdio ,
std.traits ;
template DummyLast ( alias Func ) {
ReturnType!Func DummyLast ( ParameterTypeTuple!Func[ 0 .. $ -
1 ] args ) {
ParameterTypeTuple!Func[ $ - 1 ] dummy;
return Func( args, dummy );
}
}
bool foo ( byte[] data, out int stats ) {
stats = 42;
return true;
}
alias DummyLast!foo foo;
void main () {
byte[] data;
bool result;
int stats;
result = foo( data, stats );
writeln( result, ' ', stats );
result = false;
stats = 0;
result = foo( data );
writeln( result, ' ', stats );
}
##############################
-- Chris NS
