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/* Generated by re2c */ // re2rust $INPUT -o $OUTPUT #[derive(Debug, PartialEq)] enum Num { Int, Float, NaN } fn lex(str: &[u8]) -> Num { let mut cur = 0; let mut mar = 0; { #[allow(unused_assignments)] let mut yych : u8 = 0; let mut yyaccept : usize = 0; let mut yystate : usize = 0; 'yyl: loop { match yystate { 0 => { yych = unsafe {*str.get_unchecked(cur)}; cur += 1; match yych { 0x2E => { yystate = 3; continue 'yyl; } 0x30 => { yystate = 4; continue 'yyl; } 0x31 ..= 0x39 => { yystate = 5; continue 'yyl; } _ => { yystate = 1; continue 'yyl; } } } 1 => { yystate = 2; continue 'yyl; } 2 => { return Num::NaN; } 3 => { yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x30 ..= 0x39 => { cur += 1; yystate = 7; continue 'yyl; } _ => { yystate = 2; continue 'yyl; } } } 4 => { yyaccept = 0; mar = cur; yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x2E => { cur += 1; yystate = 7; continue 'yyl; } 0x30 ..= 0x39 => { cur += 1; yystate = 9; continue 'yyl; } 0x45 | 0x65 => { cur += 1; yystate = 11; continue 'yyl; } _ => { yystate = 2; continue 'yyl; } } } 5 => { yyaccept = 1; mar = cur; yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x2E => { cur += 1; yystate = 7; continue 'yyl; } 0x30 ..= 0x39 => { cur += 1; yystate = 5; continue 'yyl; } 0x45 | 0x65 => { cur += 1; yystate = 11; continue 'yyl; } _ => { yystate = 6; continue 'yyl; } } } 6 => { return Num::Int; } 7 => { yyaccept = 2; mar = cur; yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x30 ..= 0x39 => { cur += 1; yystate = 7; continue 'yyl; } 0x45 | 0x65 => { cur += 1; yystate = 11; continue 'yyl; } _ => { yystate = 8; continue 'yyl; } } } 8 => { return Num::Float; } 9 => { yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x2E => { cur += 1; yystate = 7; continue 'yyl; } 0x30 ..= 0x39 => { cur += 1; yystate = 9; continue 'yyl; } 0x45 | 0x65 => { cur += 1; yystate = 11; continue 'yyl; } _ => { yystate = 10; continue 'yyl; } } } 10 => { cur = mar; match yyaccept { 0 => { yystate = 2; continue 'yyl; } 1 => { yystate = 6; continue 'yyl; } _ => { yystate = 8; continue 'yyl; } } } 11 => { yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x2B | 0x2D => { cur += 1; yystate = 12; continue 'yyl; } 0x30 ..= 0x39 => { cur += 1; yystate = 13; continue 'yyl; } _ => { yystate = 10; continue 'yyl; } } } 12 => { yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x30 ..= 0x39 => { cur += 1; yystate = 13; continue 'yyl; } _ => { yystate = 10; continue 'yyl; } } } 13 => { yych = unsafe {*str.get_unchecked(cur)}; match yych { 0x30 ..= 0x39 => { cur += 1; yystate = 13; continue 'yyl; } _ => { yystate = 8; continue 'yyl; } } } _ => { panic!("internal lexer error") } } } } } fn main() { assert_eq!(lex(b"123\0"), Num::Int); assert_eq!(lex(b"123.4567\0"), Num::Float); }