import std.meta;

​

alias Types = AliasSeq!(byte, ubyte, short, ushort, int, uint);

enum typeIndex(T) = staticIndexOf!(T, Types);

char[6] typechars="cCsSiI";

​

bool check(T)(char c) {

    return typechars[typeIndex!T] == c;

}

​

unittest {

    assert(check!byte('c'));

    assert(check!ubyte('C'));

    assert(check!short('s'));

    assert(check!ushort('S'));

    assert(check!int('i'));

    assert(check!uint('I'));

}