| 1 | pub trait ToF64 {
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| 2 | fn to_f64(&self) -> f64;
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| 3 | }
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| 4 |
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| 5 | macro_rules! impl_to_f64 {
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| 6 | (for $($t:ty)*) => ($(
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| 7 | impl ToF64 for $t {
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| 8 | fn to_f64(&self) -> f64 {
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| 9 | *self as f64
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| 10 | }
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| 11 | }
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| 12 | )*)
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| 13 | }
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| 14 |
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| 15 | impl_to_f64!(for usize u8 u16 u32 u64 isize i8 i16 i32 i64 f32 f64);
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| 16 |
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| 17 | pub trait Unsigned {}
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| 18 |
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| 19 | macro_rules! impl_unsigned {
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| 20 | (for $($t:ty)*) => ($(
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| 21 | impl Unsigned for $t {}
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| 22 | )*)
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| 23 | }
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| 24 |
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| 25 | impl_unsigned!(for usize u8 u16 u32 u64);
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| 26 |
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| 27 | pub trait Signed {}
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| 28 |
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| 29 | macro_rules! impl_unsigned {
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| 30 | (for $($t:ty)*) => ($(
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| 31 | impl Signed for $t {}
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| 32 | )*)
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| 33 | }
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| 34 |
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| 35 | impl_unsigned!(for isize i8 i16 i32 i64);
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| 36 | |
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