Checking that a template parameter is an enum
Nordlöw via Digitalmars-d-learn
digitalmars-d-learn at puremagic.com
Wed Sep 30 17:04:15 PDT 2015
How do I check that a template parameter is a CT-value or an enum
symbol?
I want this to restrict the following template:
/** Returns: true iff all values $(D V) are the same. */
template allSame(V...) // TODO restrict to values only
{
static if (V.length <= 1)
enum bool allSame = true;
else
enum bool allSame = V[0] == V[1] && allSame!(V[1..$]);
}
unittest
{
static assert(!allSame!(41, 42));
static assert(allSame!(42, 42, 42));
}
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