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fixed
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implement az casts from bool to fixed-point

This commit is contained in:
Trevor Spiteri 2019-10-10 19:57:44 +02:00
parent a99655c809
commit f3dc9cdb04
1 changed files with 99 additions and 77 deletions
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176
src/cast.rs
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@ -65,76 +65,78 @@ macro_rules! run_time {
}
};
($Fixed:ident($LeEqU:ident); $Num:ident) => {
impl<Frac: $LeEqU> Cast<$Fixed<Frac>> for $Num {
($Fixed:ident($LeEqU:ident); $Dst:ident) => {
impl<Frac: $LeEqU> Cast<$Dst> for $Fixed<Frac> {
#[inline]
fn cast(self) -> $Dst {
self.to_num()
}
}
impl<Frac: $LeEqU> CheckedCast<$Dst> for $Fixed<Frac> {
#[inline]
fn checked_cast(self) -> Option<$Dst> {
self.checked_to_num()
}
}
impl<Frac: $LeEqU> SaturatingCast<$Dst> for $Fixed<Frac> {
#[inline]
fn saturating_cast(self) -> $Dst {
self.saturating_to_num()
}
}
impl<Frac: $LeEqU> WrappingCast<$Dst> for $Fixed<Frac> {
#[inline]
fn wrapping_cast(self) -> $Dst {
self.wrapping_to_num()
}
}
impl<Frac: $LeEqU> OverflowingCast<$Dst> for $Fixed<Frac> {
#[inline]
fn overflowing_cast(self) -> ($Dst, bool) {
self.overflowing_to_num()
}
}
};
($Src:ident; $Fixed:ident($LeEqU:ident)) => {
impl<Frac: $LeEqU> Cast<$Fixed<Frac>> for $Src {
#[inline]
fn cast(self) -> $Fixed<Frac> {
<$Fixed<Frac>>::from_num(self)
}
}
impl<Frac: $LeEqU> Cast<$Num> for $Fixed<Frac> {
#[inline]
fn cast(self) -> $Num {
self.to_num()
}
}
impl<Frac: $LeEqU> CheckedCast<$Fixed<Frac>> for $Num {
impl<Frac: $LeEqU> CheckedCast<$Fixed<Frac>> for $Src {
#[inline]
fn checked_cast(self) -> Option<$Fixed<Frac>> {
<$Fixed<Frac>>::checked_from_num(self)
}
}
impl<Frac: $LeEqU> CheckedCast<$Num> for $Fixed<Frac> {
#[inline]
fn checked_cast(self) -> Option<$Num> {
self.checked_to_num()
}
}
impl<Frac: $LeEqU> SaturatingCast<$Fixed<Frac>> for $Num {
impl<Frac: $LeEqU> SaturatingCast<$Fixed<Frac>> for $Src {
#[inline]
fn saturating_cast(self) -> $Fixed<Frac> {
<$Fixed<Frac>>::saturating_from_num(self)
}
}
impl<Frac: $LeEqU> SaturatingCast<$Num> for $Fixed<Frac> {
#[inline]
fn saturating_cast(self) -> $Num {
self.saturating_to_num()
}
}
impl<Frac: $LeEqU> WrappingCast<$Fixed<Frac>> for $Num {
impl<Frac: $LeEqU> WrappingCast<$Fixed<Frac>> for $Src {
#[inline]
fn wrapping_cast(self) -> $Fixed<Frac> {
<$Fixed<Frac>>::wrapping_from_num(self)
}
}
impl<Frac: $LeEqU> WrappingCast<$Num> for $Fixed<Frac> {
#[inline]
fn wrapping_cast(self) -> $Num {
self.wrapping_to_num()
}
}
impl<Frac: $LeEqU> OverflowingCast<$Fixed<Frac>> for $Num {
impl<Frac: $LeEqU> OverflowingCast<$Fixed<Frac>> for $Src {
#[inline]
fn overflowing_cast(self) -> ($Fixed<Frac>, bool) {
<$Fixed<Frac>>::overflowing_from_num(self)
}
}
impl<Frac: $LeEqU> OverflowingCast<$Num> for $Fixed<Frac> {
#[inline]
fn overflowing_cast(self) -> ($Num, bool) {
self.overflowing_to_num()
}
}
};
}
@ -205,69 +207,73 @@ macro_rules! compile_time {
}
};
($FixedI:ident, $FixedU:ident($LeEqU:ident); int $IntI:ident, $IntU:ident) => {
($FixedI:ident, $FixedU:ident($LeEqU:ident); int $DstI:ident, $DstU:ident) => {
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedI<Frac>> for $IntI {
<$FixedI<Frac>>::INT_NBITS >= 8 * mem::size_of::<$IntI>() as u32
impl<Frac: $LeEqU> StaticCast<$DstI> for $FixedI<Frac> {
8 * mem::size_of::<$DstI>() as u32 >= <$FixedI<Frac>>::INT_NBITS
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$IntI> for $FixedI<Frac> {
8 * mem::size_of::<$IntI>() as u32 >= <$FixedI<Frac>>::INT_NBITS
impl<Frac: $LeEqU> StaticCast<$DstI> for $FixedU<Frac> {
8 * mem::size_of::<$DstI>() as u32 > <$FixedU<Frac>>::INT_NBITS
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedU<Frac>> for $IntI {
impl<Frac: $LeEqU> StaticCast<$DstU> for $FixedI<Frac> {
false
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$IntI> for $FixedU<Frac> {
8 * mem::size_of::<$IntI>() as u32 > <$FixedU<Frac>>::INT_NBITS
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedI<Frac>> for $IntU {
<$FixedI<Frac>>::INT_NBITS > 8 * mem::size_of::<$IntU>() as u32
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$IntU> for $FixedI<Frac> {
false
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedU<Frac>> for $IntU {
<$FixedU<Frac>>::INT_NBITS >= 8 * mem::size_of::<$IntU>() as u32
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$IntU> for $FixedU<Frac> {
8 * mem::size_of::<$IntU>() as u32 >= <$FixedU<Frac>>::INT_NBITS
impl<Frac: $LeEqU> StaticCast<$DstU> for $FixedU<Frac> {
8 * mem::size_of::<$DstU>() as u32 >= <$FixedU<Frac>>::INT_NBITS
}
}
};
($Fixed:ident($LeEqU:ident); float $Float:ident) => {
(int $SrcI:ident, $SrcU:ident; $FixedI:ident, $FixedU:ident($LeEqU:ident)) => {
compile_time! {
impl<Frac: $LeEqU> StaticCast<$Fixed<Frac>> for $Float {
false
impl<Frac: $LeEqU> StaticCast<$FixedI<Frac>> for $SrcI {
<$FixedI<Frac>>::INT_NBITS >= 8 * mem::size_of::<$SrcI>() as u32
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$Float> for $Fixed<Frac> {
impl<Frac: $LeEqU> StaticCast<$FixedU<Frac>> for $SrcI {
false
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedI<Frac>> for $SrcU {
<$FixedI<Frac>>::INT_NBITS > 8 * mem::size_of::<$SrcU>() as u32
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedU<Frac>> for $SrcU {
<$FixedU<Frac>>::INT_NBITS >= 8 * mem::size_of::<$SrcU>() as u32
}
}
};
($Fixed:ident($LeEqU:ident); float $Dst:ident) => {
compile_time! {
impl<Frac: $LeEqU> StaticCast<$Dst> for $Fixed<Frac> {
true
}
}
};
(float $Src:ident; $Fixed:ident($LeEqU:ident)) => {
compile_time! {
impl<Frac: $LeEqU> StaticCast<$Fixed<Frac>> for $Src {
false
}
}
};
}
macro_rules! run_time_num {
@ -276,6 +282,7 @@ macro_rules! run_time_num {
)* };
($Fixed:ident($LeEqU:ident); $($Num:ident,)*) => { $(
run_time! { $Fixed($LeEqU); $Num }
run_time! { $Num; $Fixed($LeEqU) }
)* };
($($Fixed:ident($LeEqU:ident),)*) => { $(
run_time_num! {
@ -285,6 +292,7 @@ macro_rules! run_time_num {
FixedU8(LeEqU8), FixedU16(LeEqU16), FixedU32(LeEqU32), FixedU64(LeEqU64),
FixedU128(LeEqU128),
}
run_time! { bool; $Fixed($LeEqU) }
run_time_num! {
$Fixed($LeEqU);
i8, i16, i32, i64, i128, isize,
@ -333,8 +341,21 @@ compile_time_fixed! {
macro_rules! compile_time_int {
($FixedI:ident, $FixedU:ident($LeEqU:ident); $(($IntI:ident, $IntU:ident),)*) => { $(
compile_time! { $FixedI, $FixedU($LeEqU); int $IntI, $IntU }
compile_time! { int $IntI, $IntU; $FixedI, $FixedU($LeEqU) }
)* };
($($FixedI:ident, $FixedU:ident($LeEqU:ident),)*) => { $(
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedI<Frac>> for bool {
<$FixedI<Frac>>::INT_NBITS > 1
}
}
compile_time! {
impl<Frac: $LeEqU> StaticCast<$FixedU<Frac>> for bool {
<$FixedU<Frac>>::INT_NBITS >= 1
}
}
compile_time_int! {
$FixedI, $FixedU($LeEqU);
(i8, u8),
@ -358,6 +379,7 @@ compile_time_int! {
macro_rules! compile_time_float {
($Fixed:ident($LeEqU:ident); $($Float:ident,)*) => { $(
compile_time! { $Fixed($LeEqU); float $Float }
compile_time! { float $Float; $Fixed($LeEqU) }
)* };
($($Fixed:ident($LeEqU:ident),)*) => { $(
compile_time_float! {