rosy 0.0.9

Ruby bindings for Rust.
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::{
    object::Ty,
    ruby::{
        self,
        RBasic,
        VALUE,
        value_type,
        special_consts::*,
    }
};

pub const NIL_VALUE:   VALUE = Qnil   as VALUE;
pub const TRUE_VALUE:  VALUE = Qtrue  as VALUE;
pub const FALSE_VALUE: VALUE = Qfalse as VALUE;
pub const UNDEF_VALUE: VALUE = Qundef as VALUE;

pub const MAX_VALUE: VALUE = !0;
pub const MAX_VALUE_SHIFTED: VALUE = MAX_VALUE << SPECIAL_SHIFT;

#[inline]
pub fn matches_ruby_size_align<T>() -> bool {
    use std::mem::{align_of, size_of};
    size_of::<T>()  == size_of::<VALUE>() &&
    align_of::<T>() == align_of::<VALUE>()
}

#[inline]
pub fn test_value(v: VALUE) -> bool {
    v & !NIL_VALUE != 0
}

pub fn value_is_ty(v: VALUE, ty: Ty) -> bool {
    match ty {
        Ty::FIXNUM => value_is_fixnum(v),
        Ty::FLOAT  => value_is_float(v),
        Ty::SYMBOL => value_is_sym(v),
        Ty::TRUE   => v == TRUE_VALUE,
        Ty::FALSE  => v == FALSE_VALUE,
        Ty::NIL    => v == NIL_VALUE,
        Ty::UNDEF  => v == UNDEF_VALUE,
        _ => if let Some(t) = value_built_in_ty(v) {
            t == ty
        } else {
            false
        }
    }
}

pub fn value_ty(v: VALUE) -> Ty {
    match v {
        NIL_VALUE   => Ty::NIL,
        TRUE_VALUE  => Ty::TRUE,
        FALSE_VALUE => Ty::FALSE,
        UNDEF_VALUE => Ty::UNDEF,
        _ => if value_is_sym(v) {
            Ty::SYMBOL
        } else if value_is_float(v) {
            Ty::FLOAT
        } else if value_is_fixnum(v) {
            Ty::FIXNUM
        } else if let Some(built_in) = value_built_in_ty(v) {
            built_in
        } else {
            Ty::_UNKNOWN
        }
    }
}

#[inline]
pub unsafe fn value_flags(v: VALUE) -> VALUE {
    (*(v as *const RBasic)).flags
}

#[inline]
pub unsafe fn value_built_in_ty_unchecked(v: VALUE) -> Ty {
    std::mem::transmute((value_flags(v) & value_type::MASK as VALUE) as u32)
}

#[inline]
pub fn value_built_in_ty(v: VALUE) -> Option<Ty> {
    if value_is_special_const(v) {
        None
    } else {
        unsafe { Some(value_built_in_ty_unchecked(v)) }
    }
}

#[inline]
pub fn value_is_built_in_ty(v: VALUE, ty: Ty) -> bool {
    value_built_in_ty(v) == Some(ty)
}

#[inline]
pub fn value_flag(v: VALUE) -> VALUE {
    v & !MAX_VALUE_SHIFTED
}

#[inline]
pub const fn fixnum_to_value(i: isize) -> VALUE {
    ((i as VALUE) << 1) | FIXNUM_FLAG
}

#[inline]
pub const fn value_to_fixnum(v: VALUE) -> isize {
    ((v & !FIXNUM_FLAG) as isize) >> 1
}

#[inline]
pub const fn value_is_fixnum(v: VALUE) -> bool {
    v & FIXNUM_FLAG as VALUE != 0
}

#[inline]
pub fn value_is_float(v: VALUE) -> bool {
    ruby::rb_flonum_p(v) || value_is_built_in_ty(v, Ty::FLOAT)
}

#[inline]
pub fn value_is_immediate(v: VALUE) -> bool {
    v & IMMEDIATE_MASK as VALUE != 0
}

#[inline]
pub fn value_is_special_const(v: VALUE) -> bool {
    value_is_immediate(v) || !test_value(v)
}

#[inline]
pub fn value_is_static_sym(v: VALUE) -> bool {
    value_flag(v) == SYMBOL_FLAG as VALUE
}

#[inline]
pub fn value_is_dyn_sym(v: VALUE) -> bool {
    value_is_built_in_ty(v, Ty::SYMBOL)
}

#[inline]
pub fn value_is_sym(v: VALUE) -> bool {
    value_is_static_sym(v) || value_is_dyn_sym(v)
}

#[inline]
pub fn value_is_class(v: VALUE) -> bool {
    value_is_built_in_ty(v, Ty::CLASS)
}

#[inline]
pub fn value_is_module(v: VALUE) -> bool {
    value_is_built_in_ty(v, Ty::MODULE)
}

pub trait Sealed {}