flexon 0.4.6

SIMD accelerated JSON parser
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

pub const NUM_LUT: [bool; 256] = {
    let mut tmp = [false; 256];
    let mut idx = b'0';

    while idx <= b'9' {
        tmp[idx as usize] = true;
        idx += 1;
    }

    tmp[b'-' as usize] = true;
    tmp[b'.' as usize] = true;
    tmp[b'e' as usize] = true;
    tmp[b'E' as usize] = true;

    tmp
};

pub const ESC_LUT: [u8; 256] = {
    let mut tmp = [0; 256];

    tmp[b'"' as usize] = b'"';
    tmp[b'/' as usize] = b'/';
    tmp[b'n' as usize] = b'\n';
    tmp[b't' as usize] = b'\t';
    tmp[b'r' as usize] = b'\r';
    tmp[b'\\' as usize] = b'\\';
    tmp[b'b' as usize] = b'\x08';
    tmp[b'f' as usize] = b'\x0C';

    tmp
};

// refer to `ValueBuilder::literal`
pub const NON_LIT_LUT: [bool; 256] = {
    let mut tmp = [false; 256];
    let mut idx = 128;

    while idx != 256 {
        tmp[idx] = true;
        idx += 1;
    }

    tmp[b'{' as usize] = true;
    tmp[b'}' as usize] = true;
    tmp[b'[' as usize] = true;
    tmp[b']' as usize] = true;
    tmp[b'"' as usize] = true;
    tmp[b':' as usize] = true;
    tmp[b',' as usize] = true;
    tmp[b'/' as usize] = true;
    tmp[b' ' as usize] = true;
    tmp[b'\n' as usize] = true;
    tmp[b'\t' as usize] = true;
    tmp[b'\r' as usize] = true;
    tmp[b'\0' as usize] = true;

    tmp
};

pub trait Sealed {}

#[inline(always)]
pub fn likely(b: bool) -> bool {
    #[cfg(feature = "nightly")]
    return core::hint::likely(b);

    #[cfg(not(feature = "nightly"))]
    return b;
}

#[inline(always)]
pub fn unlikely(b: bool) -> bool {
    #[cfg(feature = "nightly")]
    return core::hint::unlikely(b);

    #[cfg(not(feature = "nightly"))]
    return b;
}

#[inline(always)]
pub fn cold_path() {
    #[cfg(feature = "nightly")]
    core::hint::cold_path()
}