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---
source: logos-codegen/tests/codegen.rs
expression: formatted
---
impl<'s> ::logos::Logos<'s> for Token {
type Error = ();
type Extras = ();
type Source = [u8];
fn lex(
lex: &mut ::logos::Lexer<'s, Self>,
) -> core::option::Option<
core::result::Result<Self, <Self as ::logos::Logos<'s>>::Error>,
> {
use ::logos::internal::{
LexerInternal, CallbackRetVal, CallbackResult, SkipRetVal, SkipResult,
};
use core::result::Result as _Result;
use core::option::Option as _Option;
use ::logos::Logos;
type _Lexer<'s> = ::logos::Lexer<'s, Token>;
macro_rules! _fast_loop {
($lex:ident, $test:ident, $offset:ident) => {
'fast_loop : { while let Some(arr) = $lex .read:: < & [u8; 8usize] >
($offset) { if $test (arr[0usize]) { $offset += 0usize; break 'fast_loop;
} if $test (arr[1usize]) { $offset += 1usize; break 'fast_loop; } if
$test (arr[2usize]) { $offset += 2usize; break 'fast_loop; } if $test
(arr[3usize]) { $offset += 3usize; break 'fast_loop; } if $test
(arr[4usize]) { $offset += 4usize; break 'fast_loop; } if $test
(arr[5usize]) { $offset += 5usize; break 'fast_loop; } if $test
(arr[6usize]) { $offset += 6usize; break 'fast_loop; } if $test
(arr[7usize]) { $offset += 7usize; break 'fast_loop; } $offset += 8usize;
} while let Some(byte) = $lex .read:: < u8 > ($offset) { if $test (byte)
{ break 'fast_loop; } $offset += 1; } }
};
}
macro_rules! _take_action {
($lex:ident, $offset:ident, $context:ident, $state:ident) => {
{ let action = _get_action($lex, $offset, $context); match action {
CallbackResult::Emit(tok) => { return Some(Ok(tok)); },
CallbackResult::Skip => { $lex .trivia(); $offset = $lex .offset();
$context = None; $state = LogosState::State3; continue; },
CallbackResult::Error(err) => { return Some(Err(err)); },
CallbackResult::DefaultError => { return Some(Err(_make_error($lex))); },
} }
};
}
#[inline]
fn _make_error<'s>(lex: &mut _Lexer<'s>) -> <Token as Logos<'s>>::Error {
<Token as Logos<'s>>::Error::default()
}
#[inline]
fn _get_action<'s>(
lex: &mut _Lexer<'s>,
offset: usize,
context: _Option<LogosLeaf>,
) -> CallbackResult<'s, Token> {
match context {
None => {
lex.end_to_boundary(offset.max(lex.offset() + 1));
CallbackResult::Error(_make_error(lex))
}
Some(LogosLeaf::Leaf0) => CallbackResult::Emit(Token::Newline),
Some(LogosLeaf::Leaf1) => CallbackResult::Emit(Token::AnyUnicode),
Some(LogosLeaf::Leaf2) => CallbackResult::Emit(Token::Any),
}
}
#[derive(Clone, Copy)]
enum LogosLeaf {
Leaf0 = 0isize,
Leaf1 = 1isize,
Leaf2 = 2isize,
}
#[derive(Clone, Copy)]
enum LogosState {
State0,
State1,
State10,
State11,
State12,
State2,
State3,
State4,
State5,
State6,
State7,
State8,
State9,
}
let mut state = LogosState::State3;
let mut offset = lex.offset();
let mut context: _Option<LogosLeaf> = None;
loop {
match state {
LogosState::State0 => {
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 191u8)) {
offset += 1;
state = LogosState::State1;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State1 => {
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 191u8)) {
offset += 1;
state = LogosState::State2;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State2 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf1);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State3 => {
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
const TABLE: [_Option<LogosState>; 256] = [
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State8),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State2),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State10),
Some(LogosState::State11),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State7),
Some(LogosState::State12),
Some(LogosState::State12),
Some(LogosState::State4),
Some(LogosState::State5),
Some(LogosState::State5),
Some(LogosState::State5),
Some(LogosState::State6),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
Some(LogosState::State9),
];
let next_state = TABLE[byte as usize];
if let Some(next_state) = next_state {
offset += 1;
state = next_state;
continue;
}
} else {
if lex.offset() == offset {
return None;
}
}
_take_action!(lex, offset, context, state)
}
LogosState::State4 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 144u8..= 191u8)) {
offset += 1;
state = LogosState::State0;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State5 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 191u8)) {
offset += 1;
state = LogosState::State0;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State6 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 143u8)) {
offset += 1;
state = LogosState::State0;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State7 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 159u8)) {
offset += 1;
state = LogosState::State1;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State8 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf0);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State9 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State10 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 191u8)) {
offset += 1;
state = LogosState::State2;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State11 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 160u8..= 191u8)) {
offset += 1;
state = LogosState::State1;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
LogosState::State12 => {
lex.end(offset);
context = Some(LogosLeaf::Leaf2);
let other = lex.read::<u8>(offset);
if let Some(byte) = other {
if (matches!(byte, 128u8..= 191u8)) {
offset += 1;
state = LogosState::State1;
continue;
}
} else {}
_take_action!(lex, offset, context, state)
}
}
}
}
}