/******************************************************************************
 * This program demonstrates basic string functions.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

#![allow(dead_code)]
#![allow(non_snake_case)]
#![allow(non_upper_case_globals)]

fn main() {
	let alphabet:&'static str = "abcdefghijklmnopqrstuvwxyzabc";
	let greek_alphabet:&'static str = "αβγδεζηθικλμνξοπρσςτυφχψωαβγ";
	let emoji:&'static str = "😃😇🥰🤪🤑😴🤒🥵🥶🤯🥳😎😥😱😡🤬💀👽🤖😺🙈🙉🙊😃😇🥰";

	println!("Length: {}", strlen(alphabet));
	println!("charAt(17): {}", alphabet[17]);
	println!("codePointAt(17): {}", alphabet[17]);
	println!("substr(23, 26): {}", substr(alphabet,23,26));
	println!("prefix(6): {}", prefix(alphabet,6));
	println!("right_tail(6): {}", right_tail(alphabet,6));
	println!("suffix(6): {}", suffix(alphabet,6));
	println!("find(\'def\'): {}", find(alphabet,"def"));
	println!("find(\'def\') is not found: {}", (find(alphabet,"def") == string::npos));
	println!("find(\'bug\'): {}", find(alphabet,"bug"));
	println!("find(\'bug\') is not found: {}", (find(alphabet,"bug") == string::npos));
	println!("rfind(\'abc\'): {}", rfind(alphabet,"abc"));
	println!("rfind(\'abc\') is not found: {}", (rfind(alphabet,"abc") == string::npos));
	println!("rfind(\'bug\'): {}", rfind(alphabet,"bug"));
	println!("rfind(\'bug\') is not found: {}", (rfind(alphabet,"bug") == string::npos));

	println!("Length: {}", strlen(greek_alphabet));
	println!("charAt(17): {}", greek_alphabet[17]);
	println!("codePointAt(17): {}", greek_alphabet[17]);
	println!("substr(23, 26): {}", substr(greek_alphabet,23,26));
	println!("prefix(6): {}", prefix(greek_alphabet,6));
	println!("right_tail(6): {}", right_tail(greek_alphabet,6));
	println!("suffix(6): {}", suffix(greek_alphabet,6));
	println!("find(\'δεζ\'): {}", find(greek_alphabet,"δεζ"));
	println!("find(\'δεζ\') is not found: {}", (find(greek_alphabet,"δεζ") == string::npos));
	println!("find(\'bug\'): {}", find(greek_alphabet,"bug"));
	println!("find(\'bug\') is not found: {}", (find(greek_alphabet,"bug") == string::npos));
	println!("rfind(\'αβγ\'): {}", rfind(greek_alphabet,"αβγ"));
	println!("rfind(\'αβγ\') is not found: {}", (rfind(greek_alphabet,"αβγ") == string::npos));
	println!("rfind(\'bug\'): {}", rfind(greek_alphabet,"bug"));
	println!("rfind(\'bug\') is not found: {}", (rfind(greek_alphabet,"bug") == string::npos));

	println!("Length: {}", strlen(emoji));
	println!("charAt(16): {}", emoji[16]);
	println!("codePointAt(16): {}", emoji[16]);
	println!("substr(20, 24): {}", substr(emoji,20,24));
	println!("prefix(6): {}", prefix(emoji,6));
	println!("right_tail(6): {}", right_tail(emoji,6));
	println!("suffix(6): {}", suffix(emoji,6));
	println!("find(\'😱😡🤬\'): {}", find(emoji,"😱😡🤬"));
	println!("find(\'😱😡🤬\') is not found: {}", (find(emoji,"😱😡🤬") == string::npos));
	println!("find(\'bug\'): {}", find(emoji,"bug"));
	println!("find(\'bug\') is not found: {}", (find(emoji,"bug") == string::npos));
	println!("rfind(\'😃😇🥰\'): {}", rfind(emoji,"😃😇🥰"));
	println!("rfind(\'😃😇🥰\') is not found: {}", (rfind(emoji,"😃😇🥰") == string::npos));
	println!("rfind(\'bug\'): {}", rfind(emoji,"bug"));
	println!("rfind(\'bug\') is not found: {}", (rfind(emoji,"bug") == string::npos));
}