intFlagPolicyOf

import checkedint : SmartInt, SafeInt;

alias IFP = IntFlagPolicy;
assert(intFlagPolicyOf!(SmartInt!(long, IFP.throws)) == IFP.throws);
assert(intFlagPolicyOf!(SafeInt!(uint, IFP.asserts)) == IFP.asserts);
assert(intFlagPolicyOf!(SmartInt!(ushort, IFP.sticky)) == IFP.sticky);

// basic types implicitly have the `none` policy
assert(intFlagPolicyOf!(wchar) == IFP.none);
assert(intFlagPolicyOf!(int) == IFP.none);
assert(intFlagPolicyOf!(double) == IFP.none);
assert(intFlagPolicyOf!(bool) == IFP.none);

alias IFP = IntFlagPolicy;
struct Foo
{
    enum policy = IFP.asserts;
}
assert(intFlagPolicyOf!Foo == IFP.asserts);

struct Bar
{
    // This will be ignored by intFlagPolicyOf, because it has the wrong type:
    enum policy = 2;
}
assert(intFlagPolicyOf!Bar == IFP.none);