This module suports bit tested character sets up to 512 characters in length starting from any point in the unicode utf32 standard.

Character sets are created at compile time. A number of compile time functions are included in the utf_utils module that assist in converting utf8 strings to arrays of Char32 which can then be used by the macro to create a character set bitmap.

The limitation of creating character sets at compile time can be overcome by writing a small program to print a character set which can then be hard coded as a const. The module comes with a custom print formatting that makes it easy to print out, copy and paste the result into source code.

Some Ascii character sets are included by defualt.

const CSet LC_ALPHA = { .index = 0, .data = {10633823807823001954701781295154855936, 0, 0, 0} };
const CSet UC_ALPHA = { .index = 0, .data = {2475880041677272402379145216, 0, 0, 0} };
const CSet ALPHA = { .index = 0, .data = {10633823810298881996379053697534001152, 0, 0, 0} };
const CSet NUMERIC = { .index = 0, .data = {287948901175001088, 0, 0, 0} };
const CSet ALPHA_NUMERIC = { .index = 0, .data = {10633823810298881996667002598709002240, 0, 0, 0} };

module main
import cset;
import utf_utils;
	
fn void main()
{
	String str = "This IS a string 3234";
	foreach (c : str )
	{
		io::printfn ("Is %c an upper case ascii character? %s",
			c,
			cset::UC_ALPHA.char_is_in_set (c)
		);
	}
}