malachite-base 0.4.6

A collection of utilities, including new arithmetic traits and iterators that generate all values of a type
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

use malachite_base::num::basic::floats::PrimitiveFloat;
use malachite_base::num::basic::signeds::PrimitiveSigned;
use malachite_base::num::basic::traits::NegativeInfinity;
use malachite_base::num::basic::unsigneds::PrimitiveUnsigned;
use malachite_base::test_util::generators::{primitive_float_gen, signed_gen, unsigned_gen};

#[test]
pub fn test_is_integer() {
    fn test_u<T: PrimitiveUnsigned>(u: T, is_integer: bool) {
        assert_eq!(u.is_integer(), is_integer);
    }
    test_u::<u8>(0, true);
    test_u::<u8>(1, true);
    test_u::<u8>(100, true);

    fn test_i<T: PrimitiveSigned>(i: T, is_integer: bool) {
        assert_eq!(i.is_integer(), is_integer);
    }
    test_i::<i8>(0, true);
    test_i::<i8>(1, true);
    test_i::<i8>(100, true);
    test_i::<i8>(-1, true);
    test_i::<i8>(-100, true);

    fn test_f<T: PrimitiveFloat>(f: T, is_integer: bool) {
        assert_eq!(f.is_integer(), is_integer);
    }
    test_f::<f32>(0.0, true);
    test_f::<f32>(1.0, true);
    test_f::<f32>(100.0, true);
    test_f::<f32>(-1.0, true);
    test_f::<f32>(-100.0, true);

    test_f::<f32>(0.1, false);
    test_f::<f32>(100.1, false);
    test_f::<f32>(-0.1, false);
    test_f::<f32>(-100.1, false);
    test_f::<f32>(f32::NAN, false);
    test_f::<f32>(f32::INFINITY, false);
    test_f::<f32>(f32::NEGATIVE_INFINITY, false);
}

fn is_integer_unsigned<T: PrimitiveUnsigned>() {
    unsigned_gen::<T>().test_properties(|u| {
        assert!(u.is_integer());
    });
}

fn is_integer_signed<T: PrimitiveSigned>() {
    signed_gen::<T>().test_properties(|i| {
        assert!(i.is_integer());
    });
}

fn is_integer_primitive_float<T: PrimitiveFloat>() {
    primitive_float_gen::<T>().test_properties(|f| {
        assert_eq!(
            f.is_integer(),
            f.is_finite() && (f == T::ZERO || f.integer_exponent() >= 0)
        );
    });
}

#[test]
fn is_integer_properties() {
    apply_fn_to_unsigneds!(is_integer_unsigned);
    apply_fn_to_signeds!(is_integer_signed);
    apply_fn_to_primitive_floats!(is_integer_primitive_float);
}