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Dir : ~/usr/share/doc/re2c/examples/rust/

View File Name : 01_basic.rs

/* Generated by re2c */
// re2rust $INPUT -o $OUTPUT

fn lex(s: &[u8]) -> bool {
    let mut cursor = 0;
    
{
	#[allow(unused_assignments)]
	let mut yych : u8 = 0;
	let mut yystate : usize = 0;
	'yyl: loop {
		match yystate {
			0 => {
				yych = unsafe {*s.get_unchecked(cursor)};
				cursor += 1;
				match yych {
					0x31 ..= 0x39 => {
						yystate = 2;
						continue 'yyl;
					}
					_ => {
						yystate = 1;
						continue 'yyl;
					}
				}
			}
			1 => { return false; }
			2 => {
				yych = unsafe {*s.get_unchecked(cursor)};
				match yych {
					0x30 ..= 0x39 => {
						cursor += 1;
						yystate = 2;
						continue 'yyl;
					}
					_ => {
						yystate = 3;
						continue 'yyl;
					}
				}
			}
			3 => { return true; }
			_ => {
				panic!("internal lexer error")
			}
		}
	}
}

}

fn main() {
    assert!(lex(b"1234\0"));
}