hmath/bigint/convert/
from.rs

1use crate::{Ratio, BigInt, UBigInt, ConversionError};
2use crate::{impl_from_for_ref, impl_tryfrom_for_ref, impl_trait_for_general};
3
4macro_rules! impl_from_ref_bigint {
5    ($t: ty) => (
6        impl_from_for_ref!(BigInt, $t);
7    );
8    ($t: ty, $($u: ty), +) => (
9        impl_from_ref_bigint!($t);
10        impl_from_ref_bigint!($($u),+);
11    )
12}
13
14macro_rules! impl_tryfrom_ref_bigint {
15    ($t: ty) => (
16        impl_tryfrom_for_ref!(BigInt, $t);
17    );
18    ($t: ty, $($u: ty), +) => (
19        impl_tryfrom_ref_bigint!($t);
20        impl_tryfrom_ref_bigint!($($u),+);
21    )
22}
23
24impl_from_ref_bigint!(bool, u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize);
25impl_tryfrom_ref_bigint!(f32, f64);
26
27impl From<bool> for BigInt {
28    fn from(b: bool) -> Self {
29        if b {
30            BigInt::one()
31        } else {
32            BigInt::zero()
33        }
34    }
35}
36
37/// It returns the truncated value of `Ratio::from(n)`.
38impl TryFrom<f32> for BigInt {
39    type Error = ConversionError;
40
41    fn try_from(n: f32) -> Result<Self, Self::Error> {
42        Ok(Ratio::try_from(n)?.truncate_bi())
43    }
44}
45
46/// It returns the truncated value of `Ratio::from(n)`.
47impl TryFrom<f64> for BigInt {
48    type Error = ConversionError;
49
50    fn try_from(n: f64) -> Result<Self, Self::Error> {
51        Ok(Ratio::try_from(n)?.truncate_bi())
52    }
53}
54
55impl_trait_for_general!(From, i8, BigInt, from_i32);
56impl_trait_for_general!(From, i16, BigInt, from_i32);
57impl_trait_for_general!(From, i32, BigInt, from_i32);
58impl_trait_for_general!(From, i64, BigInt, from_i64);
59impl_trait_for_general!(From, i128, BigInt, from_i128);
60impl_trait_for_general!(From, u8, BigInt, from_i32);
61impl_trait_for_general!(From, u16, BigInt, from_i32);
62impl_trait_for_general!(From, u32, BigInt, from_i64);
63
64impl_trait_for_general!(TryFrom, &str, BigInt, from_string);
65
66impl From<isize> for BigInt {
67    fn from(n: isize) -> Self {
68        BigInt::from_i64(n as i64)
69    }
70}
71
72impl From<u64> for BigInt {
73    fn from(n: u64) -> Self {
74        BigInt::from_ubi(UBigInt::from_u64(n), false)
75    }
76}
77
78impl From<u128> for BigInt {
79    fn from(n: u128) -> Self {
80        BigInt::from_ubi(UBigInt::from_u128(n), false)
81    }
82}
83
84impl From<usize> for BigInt {
85    fn from(n: usize) -> Self {
86        BigInt::from_ubi(UBigInt::from_u64(n as u64), false)
87    }
88}
89
90impl TryFrom<String> for BigInt {
91    type Error = ConversionError;
92
93    fn try_from(n: String) -> Result<Self, Self::Error> {
94        BigInt::from_string(&n)
95    }
96}
97
98impl From<&Ratio> for BigInt {
99    fn from(n: &Ratio) -> Self {
100        n.truncate_bi()
101    }
102}
103
104impl From<&UBigInt> for BigInt {
105    fn from(n: &UBigInt) -> Self {
106        BigInt::from_ubi(n.clone(), false)
107    }
108}
hmath/bigint/convert/from.rs

hmath/bigint/convert/
from.rs
