pub fn isDigit(c: u8, comptime base: u8) bool
pub fn isDigit(c: u8, comptime base: u8) bool { std.debug.assert(base == 10 or base == 16); return if (base == 10) '0' <= c and c <= '9' else '0' <= c and c <= '9' or 'a' <= c and c <= 'f' or 'A' <= c and c <= 'F'; }