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refactor 'impl Int'

This commit is contained in:
Jorge Aparicio 2017-03-06 12:17:10 -05:00
parent 09d2f2f1f5
commit c6e06f4157
1 changed files with 28 additions and 51 deletions
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69
src/int/mod.rs
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@ -38,66 +38,43 @@ pub trait Int {
fn extract_sign(self) -> (bool, Self::UnsignedInt); fn extract_sign(self) -> (bool, Self::UnsignedInt);
} }
// TODO: Once i128/u128 support lands, we'll want to add impls for those as well macro_rules! int_impl {
impl Int for u32 { ($ity:ty, $uty:ty, $bits:expr) => {
type OtherSign = i32; impl Int for $uty {
type UnsignedInt = u32; type OtherSign = $ity;
type UnsignedInt = $uty;
fn bits() -> u32 { fn bits() -> u32 {
32 $bits
} }
fn extract_sign(self) -> (bool, u32) { fn extract_sign(self) -> (bool, $uty) {
(false, self) (false, self)
} }
}
impl Int for i32 {
type OtherSign = u32;
type UnsignedInt = u32;
fn bits() -> u32 {
32
} }
fn extract_sign(self) -> (bool, u32) { impl Int for $ity {
type OtherSign = $uty;
type UnsignedInt = $uty;
fn bits() -> u32 {
$bits
}
fn extract_sign(self) -> (bool, $uty) {
if self < 0 { if self < 0 {
(true, !(self as u32) + 1) (true, !(self as $uty) + 1)
} else { } else {
(false, self as u32) (false, self as $uty)
}
}
} }
} }
} }
impl Int for u64 { int_impl!(i32, u32, 32);
type OtherSign = i64; int_impl!(i64, u64, 64);
type UnsignedInt = u64; int_impl!(i128, u128, 128);
fn bits() -> u32 {
64
}
fn extract_sign(self) -> (bool, u64) {
(false, self)
}
}
impl Int for i64 {
type OtherSign = u64;
type UnsignedInt = u64;
fn bits() -> u32 {
64
}
fn extract_sign(self) -> (bool, u64) {
if self < 0 {
(true, !(self as u64) + 1)
} else {
(false, self as u64)
}
}
}
/// Trait to convert an integer to/from smaller parts /// Trait to convert an integer to/from smaller parts
pub trait LargeInt { pub trait LargeInt {