generic-json 0.7.0

Generic JSON traits
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

/// JSON number.
pub trait Number: Eq {
	/// Returns this number as an `u32` if it can be exactly represented as such.
	fn as_u32(&self) -> Option<u32>;

	/// Returns this number as an `u64` if it can be exactly represented as such.
	fn as_u64(&self) -> Option<u64>;

	/// Returns this number as an `i32` if it can be exactly represented as such.
	fn as_i32(&self) -> Option<i32>;

	/// Returns this number as an `i64` if it can be exactly represented as such.
	fn as_i64(&self) -> Option<i64>;

	/// Returns this number as an `f32` if it can be exactly represented as such.
	fn as_f32(&self) -> Option<f32>;

	/// Returns this number as an `f32`, potentially losing precision in the process.
	fn as_f32_lossy(&self) -> f32;

	/// Returns this number as an `f64` if it can be exactly represented as such.
	fn as_f64(&self) -> Option<f64>;

	/// Returns this number as an `f64`, potentially losing precision in the process.
	fn as_f64_lossy(&self) -> f64;
}

/// Zero number.
///
/// This is a dummy number type that can only represent the value `0.0`.
#[derive(PartialEq, Eq, Hash, PartialOrd, Ord, Debug)]
pub struct Zero;

impl Number for Zero {
	fn as_u32(&self) -> Option<u32> {
		None
	}

	fn as_u64(&self) -> Option<u64> {
		None
	}

	fn as_i32(&self) -> Option<i32> {
		None
	}

	fn as_i64(&self) -> Option<i64> {
		None
	}

	fn as_f32(&self) -> Option<f32> {
		Some(0.0)
	}

	fn as_f32_lossy(&self) -> f32 {
		0.0
	}

	fn as_f64(&self) -> Option<f64> {
		Some(0.0)
	}

	fn as_f64_lossy(&self) -> f64 {
		0.0
	}
}