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Reapply ebed6756de

This commit is contained in:
Łukasz Jan Niemier 2016-03-25 12:34:48 +01:00
parent 72fa7ece48
commit 956bb0f4db
1 changed files with 18 additions and 0 deletions
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18
traits/src/lib.rs
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@ -54,14 +54,21 @@ macro_rules! int_trait_impl {
} }
int_trait_impl!(Num for usize u8 u16 u32 u64 isize i8 i16 i32 i64); int_trait_impl!(Num for usize u8 u16 u32 u64 isize i8 i16 i32 i64);
#[derive(Debug)]
pub enum FloatErrorKind { pub enum FloatErrorKind {
Empty, Empty,
Invalid, Invalid,
} }
// FIXME: std::num::ParseFloatError is stable in 1.0, but opaque to us,
// so there's not really any way for us to reuse it.
#[derive(Debug)]
pub struct ParseFloatError { pub struct ParseFloatError {
pub kind: FloatErrorKind, pub kind: FloatErrorKind,
} }
// FIXME: The standard library from_str_radix on floats was deprecated, so we're stuck
// with this implementation ourselves until we want to make a breaking change.
// (would have to drop it from `Num` though)
macro_rules! float_trait_impl { macro_rules! float_trait_impl {
($name:ident for $($t:ty)*) => ($( ($name:ident for $($t:ty)*) => ($(
impl $name for $t { impl $name for $t {
@ -213,3 +220,14 @@ macro_rules! float_trait_impl {
)*) )*)
} }
float_trait_impl!(Num for f32 f64); float_trait_impl!(Num for f32 f64);
#[test]
fn from_str_radix_unwrap() {
// The Result error must impl Debug to allow unwrap()
let i: i32 = Num::from_str_radix("0", 10).unwrap();
assert_eq!(i, 0);
let f: f32 = Num::from_str_radix("0.0", 10).unwrap();
assert_eq!(f, 0.0);
}