raffia/parser/
state.rs

1use super::Parser;
2use std::{
3    mem,
4    ops::{Deref, DerefMut},
5};
6
7#[derive(Clone, Debug, Default)]
8pub(super) struct ParserState {
9    pub(super) qualified_rule_ctx: Option<QualifiedRuleContext>,
10    pub(super) sass_ctx: u8,
11    pub(super) less_ctx: u8,
12    pub(super) in_keyframes_at_rule: bool,
13}
14
15#[derive(Clone, Debug)]
16pub(super) enum QualifiedRuleContext {
17    Selector,
18    DeclarationName,
19    DeclarationValue,
20}
21
22pub(super) const SASS_CTX_IN_FUNCTION: u8 = 1;
23pub(super) const SASS_CTX_ALLOW_DIV: u8 = 2;
24pub(super) const SASS_CTX_ALLOW_KEYFRAME_BLOCK: u8 = 4;
25
26pub(super) const LESS_CTX_ALLOW_DIV: u8 = 1;
27pub(super) const LESS_CTX_ALLOW_KEYFRAME_BLOCK: u8 = 2;
28
29impl<'cmt, 's: 'cmt> Parser<'cmt, 's> {
30    pub(super) fn with_state(&mut self, state: ParserState) -> WithState<'cmt, 's, '_> {
31        let original_state = mem::replace(&mut self.state, state);
32        WithState {
33            parser: self,
34            original_state,
35        }
36    }
37}
38
39pub(super) struct WithState<'cmt, 's: 'cmt, 'p> {
40    parser: &'p mut Parser<'cmt, 's>,
41    original_state: ParserState,
42}
43
44impl<'cmt, 's: 'cmt, 'p> Deref for WithState<'cmt, 's, 'p> {
45    type Target = Parser<'cmt, 's>;
46
47    fn deref(&self) -> &Self::Target {
48        self.parser
49    }
50}
51
52impl<'cmt, 's: 'cmt, 'p> DerefMut for WithState<'cmt, 's, 'p> {
53    fn deref_mut(&mut self) -> &mut Self::Target {
54        self.parser
55    }
56}
57
58impl<'cmt, 's: 'cmt, 'p> Drop for WithState<'cmt, 's, 'p> {
59    fn drop(&mut self) {
60        mem::swap(&mut self.parser.state, &mut self.original_state);
61    }
62}
raffia/parser/state.rs

raffia/parser/
state.rs
