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Enum member std.range.isTwoWayCompatible
Returns true if fn
accepts variables of type T1 and T2 in any order.
The following code should compile:
enum isTwoWayCompatible(alias fn, T1, T2)
= is(typeof((ref T1 a, ref T2 b)
{
cast(void)fn(a, b);
cast(void)fn(b, a);
}
));
(ref T1 a, ref T2 b)
{
fn(a, b);
fn(b, a);
}
Example
void func1(int a, int b);
void func2(int a, float b);
static assert(isTwoWayCompatible!(func1, int, int));
static assert(isTwoWayCompatible!(func1, short, int));
static assert(!isTwoWayCompatible!(func2, int, float));
void func3(ref int a, ref int b);
static assert( isTwoWayCompatible!(func3, int, int));
static assert(!isTwoWayCompatible!(func3, short, int));
Authors
Andrei Alexandrescu, David Simcha, Jonathan M Davis, and Jack Stouffer. Credit for some of the ideas in building this module goes to Leonardo Maffi.
License
Copyright © 1999-2022 by the D Language Foundation | Page generated by ddox.