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

use std::fmt::Debug;
use std::marker::PhantomData;

use super::trace_u;
use super::Neu;

use crate::MayDebug;

pub struct True<T>(PhantomData<T>);

impl<T> Debug for True<T> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_tuple("True").field(&self.0).finish()
    }
}

impl<T> Default for True<T> {
    fn default() -> Self {
        Self(Default::default())
    }
}

impl<T> Clone for True<T> {
    fn clone(&self) -> Self {
        *self
    }
}

impl<T> Copy for True<T> {}

impl<T> True<T> {
    pub fn new() -> Self {
        Self(PhantomData)
    }
}

impl<T: MayDebug> Neu<T> for True<T> {
    #[inline(always)]
    fn is_match(&self, _other: &T) -> bool {
        trace_u!("true", "true", _other, true)
    }
}

/// Always return true.
///
/// # Example
/// ```
/// # use neure::prelude::*;
/// #
/// # fn main() {
///   let any = neu::any();
///   let mut ctx = CharsCtx::new("abc%$#&");
///
///   assert_eq!(ctx.try_mat(&any.repeat_times::<6>()).unwrap(), Span::new(0, 6));
/// # }
/// ```
pub const fn any<T: MayDebug>() -> True<T> {
    True(PhantomData)
}

pub struct False<T>(PhantomData<T>);

impl<T> Debug for False<T> {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        f.debug_tuple("False").field(&self.0).finish()
    }
}

impl<T> Default for False<T> {
    fn default() -> Self {
        Self(Default::default())
    }
}

impl<T> Clone for False<T> {
    fn clone(&self) -> Self {
        *self
    }
}

impl<T> Copy for False<T> {}

impl<T> False<T> {
    pub fn new() -> Self {
        Self(PhantomData)
    }
}

impl<T: MayDebug> Neu<T> for False<T> {
    #[inline(always)]
    fn is_match(&self, _other: &T) -> bool {
        trace_u!("false", "false", _other, false)
    }
}

/// Always return false.
///
/// # Example
/// ```
/// # use neure::prelude::*;
/// #
/// # fn main() {
///   let none = neu::none();
///   let mut ctx = CharsCtx::new("abc%$#&");
///
///   assert!(ctx.try_mat(&none.repeat_times::<6>()).is_err());
/// # }
/// ```
pub const fn none<T: MayDebug>() -> False<T> {
    False(PhantomData)
}