add Fixed::get_{signed,unsigned}{,_mut}
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parent
01c38307cb
commit
aadbcaceb3
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@ -107,8 +107,11 @@ The conversions supported cover the following cases.
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[`overflowing_distance`][f-od-1-9]
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* The [`unsigned_distance`][f-unsd-1-9] method was added to all signed
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fixed-point types and to the [`FixedSigned`][tfs-1-9] trait.
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* The following associated types were added to the [`Fixed`][tf-1-9] trait:
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* The following associated types and provided methods were added to the
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[`Fixed`][tf-1-9] trait:
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* [`Signed`][tf-s-1-9], [`Unsigned`][tf-u-1-9]
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* [`get_signed`][tf-gs-1-9], [`get_unsigned`][tf-gu-1-9]
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* [`get_signed_mut`][tf-gsm-1-9], [`get_unsigned_mut`][tf-gum-1-9]
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* The following traits from the [*bytemuck* crate] were implemented for all
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fixed-point numbers, added as supertraits to the [`Fixed`][tf-1-9] trait,
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and implemented for the [`Wrapping`][w-1-9] and [`Unwrapped`][u-1-9]
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@ -150,6 +153,10 @@ The conversions supported cover the following cases.
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[leu64-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/types/extra/trait.LeEqU64.html
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[leu8-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/types/extra/trait.LeEqU8.html
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[tf-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html
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[tf-gs-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_signed
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[tf-gsm-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_signed_mut
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[tf-gu-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_unsigned
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[tf-gum-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_unsigned_mut
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[tf-s-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#associatedtype.Signed
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[tf-u-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#associatedtype.Unsigned
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[tfs-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.FixedSigned.html
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@ -23,8 +23,11 @@ Version 1.9.0 (unreleased)
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[`overflowing_distance`][f-od-1-9]
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* The [`unsigned_distance`][f-unsd-1-9] method was added to all signed
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fixed-point types and to the [`FixedSigned`][tfs-1-9] trait.
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* The following associated types were added to the [`Fixed`][tf-1-9] trait:
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* The following associated types and provided methods were added to the
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[`Fixed`][tf-1-9] trait:
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* [`Signed`][tf-s-1-9], [`Unsigned`][tf-u-1-9]
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* [`get_signed`][tf-gs-1-9], [`get_unsigned`][tf-gu-1-9]
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* [`get_signed_mut`][tf-gsm-1-9], [`get_unsigned_mut`][tf-gum-1-9]
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* The following traits from the [*bytemuck* crate] were implemented for all
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fixed-point numbers, added as supertraits to the [`Fixed`][tf-1-9] trait,
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and implemented for the [`Wrapping`][w-1-9] and [`Unwrapped`][u-1-9]
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@ -66,6 +69,10 @@ Compatibility notes
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[leu64-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/types/extra/trait.LeEqU64.html
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[leu8-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/types/extra/trait.LeEqU8.html
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[tf-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html
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[tf-gs-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_signed
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[tf-gsm-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_signed_mut
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[tf-gu-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_unsigned
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[tf-gum-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#method.get_unsigned_mut
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[tf-s-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#associatedtype.Signed
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[tf-u-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.Fixed.html#associatedtype.Unsigned
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[tfs-1-9]: https://tspiteri.gitlab.io/fixed/dev/fixed/traits/trait.FixedSigned.html
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@ -95,7 +95,7 @@ x86_64-gnulinux-tarpaulin:
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image: amd64/rust:1
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variables:
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TARGET: x86_64
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REQ_COVERAGE: "78.9"
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REQ_COVERAGE: "78.5"
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cache:
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key: $CI_JOB_NAME
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paths:
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116
src/traits.rs
116
src/traits.rs
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@ -23,7 +23,7 @@ use crate::{
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F128Bits, FixedI128, FixedI16, FixedI32, FixedI64, FixedI8, FixedU128, FixedU16, FixedU32,
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FixedU64, FixedU8, ParseFixedError,
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};
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use bytemuck::{Pod, TransparentWrapper};
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use bytemuck::{self, Pod, TransparentWrapper};
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use core::{
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fmt::{Binary, Debug, Display, LowerHex, Octal, UpperHex},
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hash::Hash,
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@ -398,6 +398,120 @@ where
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/// [types]: crate::types
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type Unsigned: FixedUnsigned;
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/// Returns a reference to `self` if it is signed, or [`None`] if it is unsigned.
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///
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/// # Examples
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///
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/// ```rust
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/// use fixed::{
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/// traits::Fixed,
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/// types::{I16F16, U16F16},
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/// };
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///
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/// let i = I16F16::from_num(-3.5);
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/// match i.get_signed() {
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/// Some(signed) => assert_eq!(signed.signum(), -1),
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/// None => unreachable!(),
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/// }
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///
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/// let u = U16F16::from_num(3.5);
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/// assert!(u.get_signed().is_none());
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/// ```
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#[inline]
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fn get_signed(&self) -> Option<&Self::Signed> {
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if Self::IS_SIGNED {
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Some(bytemuck::cast_ref(self))
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} else {
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None
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}
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}
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/// Returns a reference to `self` if it is unsigned, or [`None`] if it is signed.
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///
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/// # Examples
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///
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/// ```rust
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/// use fixed::{
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/// traits::Fixed,
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/// types::{I16F16, U16F16},
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/// };
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///
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/// let u = U16F16::from_num(3.5);
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/// match u.get_unsigned() {
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/// Some(unsigned) => assert_eq!(unsigned.next_power_of_two(), 4),
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/// None => unreachable!(),
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/// }
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///
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/// let i = I16F16::from_num(3.5);
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/// assert!(i.get_unsigned().is_none());
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/// ```
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#[inline]
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fn get_unsigned(&self) -> Option<&Self::Unsigned> {
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if Self::IS_SIGNED {
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None
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} else {
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Some(bytemuck::cast_ref(self))
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}
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}
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/// Returns a mutable reference to `self` if it is signed, or [`None`] if it is unsigned.
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///
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/// # Examples
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///
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/// ```rust
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/// use fixed::{
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/// traits::Fixed,
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/// types::{I16F16, U16F16},
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/// };
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///
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/// let mut i = I16F16::from_num(-3.5);
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/// match i.get_signed_mut() {
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/// Some(signed) => *signed = signed.signum(),
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/// None => unreachable!(),
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/// }
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/// assert_eq!(i, -1);
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///
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/// let mut u = U16F16::from_num(3.5);
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/// assert!(u.get_signed_mut().is_none());
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/// ```
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#[inline]
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fn get_signed_mut(&mut self) -> Option<&mut Self::Signed> {
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if Self::IS_SIGNED {
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Some(bytemuck::cast_mut(self))
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} else {
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None
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}
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}
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/// Returns a mutable reference to `self` if it is unsigned, or [`None`] if it is signed.
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///
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/// # Examples
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///
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/// ```rust
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/// use fixed::{
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/// traits::Fixed,
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/// types::{I16F16, U16F16},
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/// };
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///
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/// let mut u = U16F16::from_num(3.5);
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/// match u.get_unsigned_mut() {
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/// Some(unsigned) => *unsigned = unsigned.next_power_of_two(),
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/// None => unreachable!(),
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/// }
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/// assert_eq!(u, 4);
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///
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/// let mut i = I16F16::from_num(3.5);
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/// assert!(i.get_unsigned_mut().is_none());
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/// ```
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#[inline]
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fn get_unsigned_mut(&mut self) -> Option<&mut Self::Unsigned> {
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if Self::IS_SIGNED {
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None
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} else {
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Some(bytemuck::cast_mut(self))
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}
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}
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/// Zero.
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///
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/// See also <code>FixedI32::[ZERO][FixedI32::ZERO]</code> and
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