Passing a single tuple or multiple values
jmh530 via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Mon Jul 18 18:22:01 PDT 2016
In the code below, is it possible to combine both bar functions
into one function (I just put some random foo function to get it
to work)?
When I try to do it, I get errors that
no property 'expand' for type '(Tuple!(int, int))'
I think it has something to do with T... being considered a
tuple. I also can't seem to do something using T.length because
it is two regardless.
import std.typecons : isTuple, tuple;
import std.stdio : writeln;
auto foo(T...)(T x)
{
T[0] y;
foreach (i, e; x)
{
y += e;
}
return y;
}
auto bar(T)(T x)
{
static if (isTuple!T)
{
return foo(x.expand);
}
}
auto bar(T...)(T x)
{
return foo(x);
}
void main()
{
auto x = tuple(1, 2);
auto y = bar(x);
auto z = bar(x.expand);
writeln(y);
writeln(z);
}
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