blob: 58b12f6cb7f69b0b762df0fa30d72602dc10702c (
plain) (
blame)
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
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
//! The `Finite<T>` struct.
use std::default::Default;
use std::ops::Deref;
use malloc_size_of::{MallocSizeOf, MallocSizeOfOps};
use num_traits::Float;
/// Encapsulates the IDL restricted float type.
#[derive(Clone, Copy, Eq, JSTraceable, PartialEq)]
pub struct Finite<T: Float>(T);
impl<T: Float> Finite<T> {
/// Create a new `Finite<T: Float>` safely.
pub fn new(value: T) -> Option<Finite<T>> {
if value.is_finite() {
Some(Finite(value))
} else {
None
}
}
/// Create a new `Finite<T: Float>`.
#[inline]
pub fn wrap(value: T) -> Finite<T> {
assert!(
value.is_finite(),
"Finite<T> doesn't encapsulate unrestricted value."
);
Finite(value)
}
}
impl<T: Float> Deref for Finite<T> {
type Target = T;
fn deref(&self) -> &T {
let Finite(value) = self;
value
}
}
impl<T: Float + MallocSizeOf> MallocSizeOf for Finite<T> {
fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize {
(**self).size_of(ops)
}
}
impl<T: Float + Default> Default for Finite<T> {
fn default() -> Finite<T> {
Finite::wrap(T::default())
}
}
|
