bit_int/bit_int/
fmt.rs

1// SPDX-FileCopyrightText: 2024 Shun Sakai
2//
3// SPDX-License-Identifier: Apache-2.0 OR MIT
4
5//! Utilities for formatting and printing [`BitInt`].
6
7use core::fmt;
8
9use num_traits::{PrimInt, Signed};
10
11use super::BitInt;
12
13macro_rules! impl_fmt {
14    ($trait:ident) => {
15        impl<T: Signed + PrimInt + fmt::$trait, const N: u32> fmt::$trait for BitInt<T, N> {
16            #[inline]
17            fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
18                self.get().fmt(f)
19            }
20        }
21    };
22}
23impl_fmt!(Display);
24impl_fmt!(Octal);
25impl_fmt!(LowerHex);
26impl_fmt!(UpperHex);
27impl_fmt!(Binary);
28impl_fmt!(LowerExp);
29impl_fmt!(UpperExp);
30
31#[cfg(test)]
32mod tests {
33    use super::super::BitI8;
34
35    #[test]
36    fn debug() {
37        assert_eq!(format!("{:?}", BitI8::<7>::MIN), "BitInt(-64)");
38        assert_eq!(format!("{:?}", BitI8::<7>::MAX), "BitInt(63)");
39    }
40
41    #[test]
42    fn display() {
43        assert_eq!(format!("{}", BitI8::<7>::MIN), "-64");
44        assert_eq!(format!("{}", BitI8::<7>::MAX), "63");
45    }
46
47    #[test]
48    fn octal() {
49        assert_eq!(format!("{:o}", BitI8::<7>::MIN), "300");
50        assert_eq!(format!("{:#o}", BitI8::<7>::MAX), "0o77");
51    }
52
53    #[test]
54    fn lower_hex() {
55        assert_eq!(format!("{:x}", BitI8::<7>::MIN), "c0");
56        assert_eq!(format!("{:#x}", BitI8::<7>::MAX), "0x3f");
57    }
58
59    #[test]
60    fn upper_hex() {
61        assert_eq!(format!("{:X}", BitI8::<7>::MIN), "C0");
62        assert_eq!(format!("{:#X}", BitI8::<7>::MAX), "0x3F");
63    }
64
65    #[test]
66    fn binary() {
67        assert_eq!(format!("{:b}", BitI8::<7>::MIN), "11000000");
68        assert_eq!(format!("{:#b}", BitI8::<7>::MAX), "0b111111");
69    }
70
71    #[test]
72    fn lower_exp() {
73        assert_eq!(format!("{:e}", BitI8::<7>::MIN), "-6.4e1");
74        assert_eq!(format!("{:e}", BitI8::<7>::MAX), "6.3e1");
75    }
76
77    #[test]
78    fn upper_exp() {
79        assert_eq!(format!("{:E}", BitI8::<7>::MIN), "-6.4E1");
80        assert_eq!(format!("{:E}", BitI8::<7>::MAX), "6.3E1");
81    }
82}
bit_int/bit_int/fmt.rs

bit_int/bit_int/
fmt.rs
