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Auto merge of #244 - wictory:master, r=cuviper 

Added trait From<T> for Ratio<T> where T: Clone + Integer

Hi!

So I thought that this kind of trait would be useful when one wants to write code which should be generic over different types of numbers.
This commit is contained in:
Homu 2016-12-03 07:14:51 +09:00
parent a63bbc916f 4bdad38eee
commit dc8c8fc3f6
1 changed files with 8 additions and 0 deletions
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8
rational/src/lib.rs
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@ -261,6 +261,13 @@ impl Ratio<BigInt> {
} }
} }
// From integer
impl<T> From<T> for Ratio<T> where T: Clone + Integer {
fn from(x: T) -> Ratio<T> {
Ratio::from_integer(x)
}
}
// Comparisons // Comparisons
// Mathematically, comparing a/b and c/d is the same as comparing a*d and b*c, but it's very easy // Mathematically, comparing a/b and c/d is the same as comparing a*d and b*c, but it's very easy
@ -738,6 +745,7 @@ mod test {
assert_eq!(_1_2, Ratio::new(1, 2)); assert_eq!(_1_2, Ratio::new(1, 2));
assert_eq!(_3_2, Ratio::new(3, 2)); assert_eq!(_3_2, Ratio::new(3, 2));
assert_eq!(_NEG1_2, Ratio::new(-1, 2)); assert_eq!(_NEG1_2, Ratio::new(-1, 2));
assert_eq!(_2, From::from(2));
} }
#[test] #[test]