oni-comb-parser-rs 1.2.123

A Rust crate for parser combinators
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153

use crate::core::{Element, ParseError, ParseResult, Parser};
use std::fmt::Debug;

use crate::extension::parsers::TakenParsers;
use crate::internal::ParsersImpl;

impl TakenParsers for ParsersImpl {
  #[inline]
  fn take<'a, I>(n: usize) -> Self::P<'a, I, &'a [I]> {
    Parser::new(move |parse_state| {
      let input = parse_state.input();
      if input.len() >= n {
        ParseResult::successful(parse_state.slice_with_len(n), n)
      } else {
        ParseResult::failed_with_uncommitted(ParseError::of_in_complete())
      }
    })
  }

  #[inline]
  fn take_while0<'a, I, F>(f: F) -> Self::P<'a, I, &'a [I]>
  where
    F: Fn(&I) -> bool + 'a,
    I: Element + Debug + 'a, {
    Parser::new(move |parse_state| {
      let input = parse_state.input();
      let mut start: Option<usize> = None;
      let mut len = 0;
      let mut index = 0;
      while let Some(c) = input.get(index) {
        if f(c) {
          if start.is_none() {
            start = Some(index);
          }
          len += 1;
        }
        index += 1;
      }
      match start {
        Some(s) => ParseResult::successful(&input[s..s + len], len),
        None => ParseResult::successful(parse_state.slice_with_len(0), 0),
      }
    })
  }

  #[inline]
  fn take_while1<'a, I, F>(f: F) -> Self::P<'a, I, &'a [I]>
  where
    F: Fn(&I) -> bool + 'a,
    I: Element + 'a, {
    Parser::new(move |parse_state| {
      let input = parse_state.input();
      let mut start: Option<usize> = None;
      let mut len = 0;
      let mut index = 0;
      while let Some(c) = input.get(index) {
        if f(c) {
          if start.is_none() {
            start = Some(index);
          }
          len += 1;
        }
        index += 1;
      }
      match start {
        Some(s) => ParseResult::successful(&input[s..s + len], len),
        None => ParseResult::failed_with_uncommitted(ParseError::of_in_complete()),
      }
    })
  }

  #[inline]
  fn take_while_n_m<'a, I, F>(n: usize, m: usize, f: F) -> Self::P<'a, I, &'a [I]>
  where
    F: Fn(&I) -> bool + 'a,
    I: Element + 'a, {
    Parser::new(move |parse_state| {
      let input = parse_state.input();
      let mut start: Option<usize> = None;
      let mut len = 0;
      let mut index = 0;
      while let Some(c) = input.get(index) {
        if f(c) {
          if start.is_none() {
            start = Some(index);
          }
          len += 1;
        }
        index += 1;
      }
      match start {
        Some(s) => {
          let str = &input[s..s + len];
          if n <= str.len() && str.len() <= m {
            ParseResult::successful(str, len)
          } else {
            ParseResult::failed_with_uncommitted(ParseError::of_in_complete())
          }
        }
        None => ParseResult::failed_with_uncommitted(ParseError::of_in_complete()),
      }
    })
  }

  #[inline]
  fn take_till0<'a, I, F>(f: F) -> Self::P<'a, I, &'a [I]>
  where
    F: Fn(&I) -> bool + 'a,
    I: Element + 'a, {
    Parser::new(move |parse_state| {
      let input = parse_state.input();
      let mut index = 0;
      let mut b = false;
      while let Some(c) = input.get(index) {
        if f(c) {
          b = true;
          break;
        }
        index += 1;
      }
      if b {
        ParseResult::successful(parse_state.slice_with_len(index + 1), index + 1)
      } else {
        let input = parse_state.input();
        ParseResult::successful(input, input.len())
      }
    })
  }

  #[inline]
  fn take_till1<'a, I, F>(f: F) -> Self::P<'a, I, &'a [I]>
  where
    F: Fn(&I) -> bool + 'a,
    I: Element + 'a, {
    Parser::new(move |parse_state| {
      let input = parse_state.input();
      let mut index = 0;
      let mut b = false;
      while let Some(c) = input.get(index) {
        if f(c) {
          b = true;
          break;
        }
        index += 1;
      }
      if b {
        ParseResult::successful(parse_state.slice_with_len(index + 1), index + 1)
      } else {
        ParseResult::failed_with_uncommitted(ParseError::of_in_complete())
      }
    })
  }
}