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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187

use alloc::string::String;
#[cfg(__unicase__iter_cmp)]
use core::cmp::Ordering;
use core::fmt;
use core::hash::{Hash, Hasher};
use core::ops::{Deref, DerefMut};
use core::str::FromStr;
#[cfg(not(__unicase__core_and_alloc))]
#[allow(deprecated, unused)]
use std::ascii::AsciiExt;

use super::{Ascii, Encoding, UniCase};

impl<S> Ascii<S> {
    #[inline]
    #[cfg(__unicase__const_fns)]
    pub const fn new(s: S) -> Ascii<S> {
        Ascii(s)
    }

    /// Construct a new `Ascii`.
    ///
    /// For Rust versions >= 1.31, this is a `const fn`.
    #[inline]
    #[cfg(not(__unicase__const_fns))]
    pub fn new(s: S) -> Ascii<S> {
        Ascii(s)
    }

    #[cfg(__unicase_const_fns)]
    pub const fn into_unicase(self) -> UniCase<S> {
        UniCase(Encoding::Ascii(self))
    }

    #[cfg(not(__unicase_const_fns))]
    pub fn into_unicase(self) -> UniCase<S> {
        UniCase(Encoding::Ascii(self))
    }

    #[inline]
    pub fn into_inner(self) -> S {
        self.0
    }
}

impl<S> Deref for Ascii<S> {
    type Target = S;
    #[inline]
    fn deref<'a>(&'a self) -> &'a S {
        &self.0
    }
}

impl<S> DerefMut for Ascii<S> {
    #[inline]
    fn deref_mut<'a>(&'a mut self) -> &'a mut S {
        &mut self.0
    }
}

#[cfg(__unicase__iter_cmp)]
impl<T: AsRef<str>> PartialOrd for Ascii<T> {
    #[inline]
    fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
        Some(self.cmp(other))
    }
}

#[cfg(__unicase__iter_cmp)]
impl<T: AsRef<str>> Ord for Ascii<T> {
    #[inline]
    fn cmp(&self, other: &Self) -> Ordering {
        let self_chars = self.as_ref().chars().map(|c| c.to_ascii_lowercase());
        let other_chars = other.as_ref().chars().map(|c| c.to_ascii_lowercase());
        self_chars.cmp(other_chars)
    }
}

impl<S: AsRef<str>> AsRef<str> for Ascii<S> {
    #[inline]
    fn as_ref(&self) -> &str {
        self.0.as_ref()
    }

}

impl<S: fmt::Display> fmt::Display for Ascii<S> {
    #[inline]
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        fmt::Display::fmt(&self.0, fmt)
    }
}

impl<S1: AsRef<str>> PartialEq<Ascii<S1>> for String {
    #[inline]
    fn eq(&self, other: &Ascii<S1>) -> bool {
        other == self
    }
}

impl<'a, S1: AsRef<str>> PartialEq<Ascii<S1>> for &'a str {
    #[inline]
    fn eq(&self, other: &Ascii<S1>) -> bool {
        other == self
    }
}

impl<S1: AsRef<str>, S2: AsRef<str>> PartialEq<S2> for Ascii<S1> {
    #[inline]
    fn eq(&self, other: &S2) -> bool {
        self.as_ref().eq_ignore_ascii_case(other.as_ref())
    }
}

impl<S: AsRef<str>> Eq for Ascii<S> {}

impl<S: FromStr> FromStr for Ascii<S> {
    type Err = <S as FromStr>::Err;
    fn from_str(s: &str) -> Result<Ascii<S>, <S as FromStr>::Err> {
        s.parse().map(Ascii)
    }
}

impl<S: AsRef<str>> Hash for Ascii<S> {
    #[inline]
    fn hash<H: Hasher>(&self, hasher: &mut H) {
        for byte in self.as_ref().bytes().map(|b| b.to_ascii_lowercase()) {
            hasher.write_u8(byte);
        }
    }
}

#[cfg(test)]
mod tests {
    use ::Ascii;
    use std::hash::{Hash, Hasher};
    #[cfg(not(__unicase__default_hasher))]
    use std::hash::SipHasher as DefaultHasher;
    #[cfg(__unicase__default_hasher)]
    use std::collections::hash_map::DefaultHasher;

    fn hash<T: Hash>(t: &T) -> u64 {
        let mut s = DefaultHasher::new();
        t.hash(&mut s);
        s.finish()
    }

    #[test]
    fn test_case_insensitive() {
        let a = Ascii("foobar");
        let b = Ascii("FOOBAR");

        assert_eq!(a, b);
        assert_eq!(hash(&a), hash(&b));

        assert_eq!(a, "fooBar");
        assert_eq!("fooBar", a);
        assert_eq!(String::from("fooBar"), a);
        assert_eq!(a, String::from("fooBar"));
    }

    #[cfg(feature = "nightly")]
    #[bench]
    fn bench_ascii_eq(b: &mut ::test::Bencher) {
        b.bytes = b"foobar".len() as u64;
        b.iter(|| assert_eq!(Ascii("foobar"), Ascii("FOOBAR")));
    }

    #[cfg(__unicase__iter_cmp)]
    #[test]
    fn test_case_cmp() {
        assert!(Ascii("foobar") == Ascii("FOOBAR"));
        assert!(Ascii("a") < Ascii("B"));

        assert!(Ascii("A") < Ascii("b"));
        assert!(Ascii("aa") > Ascii("a"));

        assert!(Ascii("a") < Ascii("aa"));
        assert!(Ascii("a") < Ascii("AA"));
    }

    #[cfg(__unicase__const_fns)]
    #[test]
    fn test_ascii_new_const() {
        const _ASCII: Ascii<&'static str> = Ascii::new("");
    }
}