parse_js/
num.rs

1use core::hash::Hash;
2use core::hash::Hasher;
3use core::mem;
4use serde::Serialize;
5use serde::Serializer;
6use std::cmp::Ordering;
7use std::fmt;
8use std::fmt::Display;
9use std::fmt::Formatter;
10
11// This provides Eq for f64.
12#[derive(Copy, Clone, PartialOrd, Debug)]
13pub struct JsNumber(pub f64);
14
15impl Display for JsNumber {
16  fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
17    write!(f, "{}", self.0)
18  }
19}
20
21impl PartialEq for JsNumber {
22  fn eq(&self, other: &Self) -> bool {
23    if self.0.is_nan() {
24      return other.0.is_nan();
25    };
26    self.0.eq(&other.0)
27  }
28}
29
30impl Eq for JsNumber {}
31
32impl Ord for JsNumber {
33  fn cmp(&self, other: &Self) -> Ordering {
34    // Only NaNs cannot be compared, and we treat them as equal.
35    self.0.partial_cmp(&other.0).unwrap_or(Ordering::Equal)
36  }
37}
38
39impl Hash for JsNumber {
40  fn hash<H: Hasher>(&self, state: &mut H) {
41    if !self.0.is_nan() {
42      unsafe { mem::transmute::<f64, u64>(self.0) }.hash(state);
43    };
44  }
45}
46
47impl Serialize for JsNumber {
48  fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error> {
49    serializer.serialize_f64(self.0)
50  }
51}
parse_js/num.rs

parse_js/
num.rs
