steal code
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mod macros;
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pub mod vector;
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#[cfg(test)]
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mod tests;
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241
src/macros/mod.rs
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241
src/macros/mod.rs
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// Stolen from https://github.com/c1m50c/fixed-vectors (MIT license)
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#[doc(hidden)]
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#[macro_export(local_inner_macros)]
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macro_rules! impl_vector {
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( $struct: ident { $($field: ident), + }, ( $($generic: ident), + ), $size: expr ) => {
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impl<T> $struct<T> {
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/// Constructs a new vector with the specified values for each field.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector2;
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///
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/// let vec2 = Vector2::new(0, 0);
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///
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/// assert_eq!(vec2.x, 0);
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/// assert_eq!(vec2.y, 0);
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/// ```
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#[inline(always)]
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pub const fn new( $($field: T), + ) -> Self {
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Self {
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$( $field ), +
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}
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}
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/// Consumes the vector and returns its values as an array.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector2;
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///
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/// let vec2 = Vector2::new(0, 0);
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/// let array = vec2.to_array();
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///
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/// assert_eq!(array, [0, 0]);
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/// ```
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#[inline(always)]
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pub fn to_array(self) -> [T; $size] {
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[ $(self.$field), + ]
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}
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/// Consumes the vector and returns its values as a tuple.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector2;
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///
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/// let vec2 = Vector2::new(0, 0);
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/// let tuple = vec2.to_tuple();
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///
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/// assert_eq!(tuple, (0, 0));
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/// ```
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#[inline(always)]
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pub fn to_tuple(self) -> ( $($generic), + ) {
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( $(self.$field), + )
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}
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/// Consumes the vector and returns a new vector with the given function applied on each field.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector2;
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///
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/// let vec2 = Vector2::new(1, 2)
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/// .map(|i| i * 2);
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///
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/// assert_eq!(vec2, Vector2::new(2, 4));
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/// ```
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#[inline]
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pub fn map<F, U>(self, f: F) -> $struct<U>
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where
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F: Fn(T) -> U
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{
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$struct {
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$( $field: f(self.$field) ), +
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}
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}
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}
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impl<T: Copy> $struct<T> {
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/// Constructs a vector using the given `value` as the value for all of its fields.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector2;
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///
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/// let vec2 = Vector2::from_value(0);
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///
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/// assert_eq!(vec2, Vector2::new(0, 0));
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/// ```
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#[inline(always)]
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pub const fn from_value(value: T) -> Self {
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Self {
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$( $field: value ), +
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}
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}
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}
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impl<T> From<[T; $size]> for $struct<T> {
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fn from(from: [T; $size]) -> Self {
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let mut iterator = from.into_iter();
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Self {
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// SAFETY: We know the size of `from` so `iterator.next()` is always `Some(..)`
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$( $field: unsafe { iterator.next().unwrap_unchecked() } ), +
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}
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}
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}
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impl<T> From<($($generic), +)> for $struct<T> {
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fn from(from: ($($generic), +)) -> Self {
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let ( $($field), + ) = from;
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Self {
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$( $field ), +
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}
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}
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}
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impl<T: core::fmt::Debug> core::fmt::Debug for $struct<T> {
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fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
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let identifier = core::stringify!($struct);
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f.debug_struct(identifier)
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$( .field( core::stringify!($field), &self.$field ) ) +
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.finish()
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}
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}
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impl<T: PartialEq> PartialEq for $struct<T> {
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fn eq(&self, other: &Self) -> bool {
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$( self.$field == other.$field ) && +
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}
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}
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impl<T: Eq> Eq for $struct<T> { }
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impl<T: core::hash::Hash> core::hash::Hash for $struct<T> {
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fn hash<H: core::hash::Hasher>(&self, state: &mut H) {
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$( self.$field.hash(state); ) +
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}
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}
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impl<T: Clone> Clone for $struct<T> {
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fn clone(&self) -> Self {
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Self {
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$( $field: self.$field.clone() ), +
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}
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}
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}
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impl<T: Copy> Copy for $struct<T> { }
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impl<T: Default> Default for $struct<T> {
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fn default() -> Self {
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Self {
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$( $field: T::default() ), +
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}
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}
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}
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impl<T: core::ops::Neg<Output = T>> core::ops::Neg for $struct<T> {
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type Output = Self;
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fn neg(self) -> Self::Output {
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Self {
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$( $field: -self.$field ), +
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}
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}
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}
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// Impl arithmetic pperators
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$crate::impl_operator!( $struct { $($field), + }, AddAssign, add_assign );
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$crate::impl_operator!( $struct { $($field), + }, Add, add, Self );
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$crate::impl_operator!( $struct { $($field), + }, SubAssign, sub_assign );
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$crate::impl_operator!( $struct { $($field), + }, Sub, sub, Self );
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$crate::impl_operator!( $struct { $($field), + }, MulAssign, mul_assign );
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$crate::impl_operator!( $struct { $($field), + }, Mul, mul, Self );
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$crate::impl_operator!( $struct { $($field), + }, DivAssign, div_assign );
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$crate::impl_operator!( $struct { $($field), + }, Div, div, Self );
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$crate::impl_operator!( $struct { $($field), + }, RemAssign, rem_assign );
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$crate::impl_operator!( $struct { $($field), + }, Rem, rem, Self );
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// Impl bitwise operators
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$crate::impl_operator!( $struct { $($field), + }, BitAndAssign, bitand_assign );
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$crate::impl_operator!( $struct { $($field), + }, BitAnd, bitand, Self );
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$crate::impl_operator!( $struct { $($field), + }, BitOrAssign, bitor_assign );
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$crate::impl_operator!( $struct { $($field), + }, BitOr, bitor, Self );
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$crate::impl_operator!( $struct { $($field), + }, BitXorAssign, bitxor_assign );
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$crate::impl_operator!( $struct { $($field), + }, BitXor, bitxor, Self );
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// Impl floating-point based methods
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//$crate::impl_floating_point_operations!( $struct { $($field), + }, $size );
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};
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}
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#[doc(hidden)]
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#[macro_export(local_inner_macros)]
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macro_rules! impl_operator {
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( $struct: ident { $($field: ident), + }, $trait: ident, $method: ident, $output: ty ) => {
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impl<T: core::ops::$trait<Output = T>> core::ops::$trait<Self> for $struct<T> {
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type Output = $output;
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fn $method(self, other: Self) -> Self::Output {
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Self {
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$( $field: self.$field.$method(other.$field) ), +
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}
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}
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}
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impl<T: core::ops::$trait<Output = T> + Copy> core::ops::$trait<T> for $struct<T> {
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type Output = $output;
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fn $method(self, other: T) -> Self::Output {
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Self {
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$( $field: self.$field.$method(other) ), +
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}
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}
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}
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};
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( $struct: ident { $($field: ident), + }, $trait: ident, $method: ident ) => {
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impl<T: core::ops::$trait> core::ops::$trait for $struct<T> {
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fn $method(&mut self, other: Self) {
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$( self.$field.$method(other.$field) ); +
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}
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}
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impl<T: core::ops::$trait + Copy> core::ops::$trait<T> for $struct<T> {
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fn $method(&mut self, other: T) {
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$( self.$field.$method(other) ); +
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}
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}
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};
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}
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68
src/vector.rs
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68
src/vector.rs
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@ -0,0 +1,68 @@
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// Stolen from https://github.com/c1m50c/fixed-vectors (MIT license)
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/// Vector for holding two-dimensional values.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector2;
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///
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/// let mut vec2 = Vector2::new(1, 2);
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/// vec2 += Vector2::new(1, 2);
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///
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/// assert_eq!(vec2.x, 2);
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/// assert_eq!(vec2.y, 4);
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/// ```
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pub struct Vector2<T> {
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pub x: T,
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pub y: T,
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}
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/// Vector for holding three-dimensional values.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector3;
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///
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/// let mut vec3 = Vector3::new(1, 2, 3);
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/// vec3 += Vector3::new(1, 2, 3);
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///
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/// assert_eq!(vec3.x, 2);
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/// assert_eq!(vec3.y, 4);
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/// assert_eq!(vec3.z, 6);
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/// ```
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pub struct Vector3<T> {
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pub x: T,
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pub y: T,
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pub z: T,
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}
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/// Vector for holding four-dimensional values.
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///
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/// # Example
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///
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/// ```
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/// use fixed_vectors::Vector4;
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///
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/// let mut vec4 = Vector4::new(1, 2, 3, 4);
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/// vec4 += Vector4::new(1, 2, 3, 4);
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///
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/// assert_eq!(vec4.x, 2);
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/// assert_eq!(vec4.y, 4);
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/// assert_eq!(vec4.z, 6);
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/// assert_eq!(vec4.w, 8);
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/// ```
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pub struct Vector4<T> {
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pub x: T,
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pub y: T,
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pub z: T,
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pub w: T,
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}
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crate::impl_vector!(Vector2 { x, y }, (T, T), 2);
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crate::impl_vector!(Vector3 { x, y, z }, (T, T, T), 3);
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crate::impl_vector!(Vector4 { x, y, z, w }, (T, T, T, T), 4);
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