2021-01-03 22:20:34 +08:00
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use crate::base::dimension::{Const, Dim, DimName, Dynamic};
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2019-03-23 21:29:07 +08:00
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use crate::base::matrix_slice::{SliceStorage, SliceStorageMut};
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2021-04-11 17:00:38 +08:00
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use crate::base::{MatrixSlice, MatrixSliceMutMN, Scalar};
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2018-02-02 19:26:04 +08:00
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2019-04-10 02:39:36 +08:00
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use num_rational::Ratio;
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2020-11-15 23:57:49 +08:00
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/// # Creating matrix slices from `&[T]`
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, R: Dim, C: Dim, RStride: Dim, CStride: Dim>
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MatrixSlice<'a, T, R, C, RStride, CStride>
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2018-04-27 13:53:08 +08:00
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{
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2018-02-02 19:26:40 +08:00
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/// Creates, without bound-checking, a matrix slice from an array and with dimensions and strides specified by generic types instances.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// This method is unsafe because the input data array is not checked to contain enough elements.
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/// The generic types `R`, `C`, `RStride`, `CStride` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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2018-02-02 19:26:18 +08:00
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#[inline]
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2018-04-27 13:53:08 +08:00
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pub unsafe fn from_slice_with_strides_generic_unchecked(
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2021-04-11 17:00:38 +08:00
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data: &'a [T],
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2018-02-02 19:26:35 +08:00
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start: usize,
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nrows: R,
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ncols: C,
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rstride: RStride,
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cstride: CStride,
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2020-04-06 00:49:48 +08:00
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) -> Self {
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2018-02-02 19:26:35 +08:00
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let data = SliceStorage::from_raw_parts(
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2020-11-16 21:59:53 +08:00
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data.as_ptr().add(start),
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2018-02-02 19:26:35 +08:00
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(nrows, ncols),
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(rstride, cstride),
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);
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2018-02-02 19:26:18 +08:00
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Self::from_data(data)
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}
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2018-02-02 19:26:40 +08:00
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/// Creates a matrix slice from an array and with dimensions and strides specified by generic types instances.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// Panics if the input data array dose not contain enough elements.
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/// The generic types `R`, `C`, `RStride`, `CStride` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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2018-02-02 19:26:04 +08:00
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#[inline]
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2018-04-27 13:53:08 +08:00
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pub fn from_slice_with_strides_generic(
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2021-04-11 17:00:38 +08:00
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data: &'a [T],
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2018-02-02 19:26:35 +08:00
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nrows: R,
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ncols: C,
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rstride: RStride,
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cstride: CStride,
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2020-04-06 00:49:48 +08:00
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) -> Self {
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2018-02-02 19:26:04 +08:00
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// NOTE: The assertion implements the following formula, but without subtractions to avoid
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// underflow panics:
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// len >= (ncols - 1) * cstride + (nrows - 1) * rstride + 1
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2018-02-02 19:26:35 +08:00
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assert!(
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data.len() + cstride.value() + rstride.value()
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>= ncols.value() * cstride.value() + nrows.value() * rstride.value() + 1,
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"Matrix slice: input data buffer to small."
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);
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2018-02-02 19:26:04 +08:00
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2018-04-27 13:53:08 +08:00
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unsafe {
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Self::from_slice_with_strides_generic_unchecked(data, 0, nrows, ncols, rstride, cstride)
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}
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2018-02-02 19:26:18 +08:00
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}
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}
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, R: Dim, C: Dim> MatrixSlice<'a, T, R, C> {
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2020-11-15 23:57:49 +08:00
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/// Creates, without bound-checking, a matrix slice from an array and with dimensions specified by generic types instances.
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///
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/// This method is unsafe because the input data array is not checked to contain enough elements.
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/// The generic types `R` and `C` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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#[inline]
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pub unsafe fn from_slice_generic_unchecked(
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2021-04-11 17:00:38 +08:00
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data: &'a [T],
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2020-11-15 23:57:49 +08:00
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start: usize,
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nrows: R,
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ncols: C,
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) -> Self {
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2021-01-03 22:20:34 +08:00
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Self::from_slice_with_strides_generic_unchecked(
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data, start, nrows, ncols, Const::<1>, nrows,
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)
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2020-11-15 23:57:49 +08:00
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}
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/// Creates a matrix slice from an array and with dimensions and strides specified by generic types instances.
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///
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/// Panics if the input data array dose not contain enough elements.
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/// The generic types `R` and `C` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn from_slice_generic(data: &'a [T], nrows: R, ncols: C) -> Self {
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2021-01-03 22:20:34 +08:00
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Self::from_slice_with_strides_generic(data, nrows, ncols, Const::<1>, nrows)
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2020-11-15 23:57:49 +08:00
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}
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}
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macro_rules! impl_constructors(
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($($Dims: ty),*; $(=> $DimIdent: ident: $DimBound: ident),*; $($gargs: expr),*; $($args: ident),*) => {
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, $($DimIdent: $DimBound),*> MatrixSlice<'a, T, $($Dims),*> {
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2020-11-15 23:57:49 +08:00
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/// Creates a new matrix slice from the given data array.
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///
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/// Panics if `data` does not contain enough elements.
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn from_slice(data: &'a [T], $($args: usize),*) -> Self {
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2020-11-15 23:57:49 +08:00
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Self::from_slice_generic(data, $($gargs),*)
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}
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/// Creates, without bound checking, a new matrix slice from the given data array.
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub unsafe fn from_slice_unchecked(data: &'a [T], start: usize, $($args: usize),*) -> Self {
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2020-11-15 23:57:49 +08:00
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Self::from_slice_generic_unchecked(data, start, $($gargs),*)
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}
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}
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, $($DimIdent: $DimBound, )*> MatrixSlice<'a, T, $($Dims,)* Dynamic, Dynamic> {
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2020-11-15 23:57:49 +08:00
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/// Creates a new matrix slice with the specified strides from the given data array.
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///
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/// Panics if `data` does not contain enough elements.
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn from_slice_with_strides(data: &'a [T], $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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2020-11-15 23:57:49 +08:00
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Self::from_slice_with_strides_generic(data, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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}
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/// Creates, without bound checking, a new matrix slice with the specified strides from the given data array.
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub unsafe fn from_slice_with_strides_unchecked(data: &'a [T], start: usize, $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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2020-11-15 23:57:49 +08:00
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Self::from_slice_with_strides_generic_unchecked(data, start, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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}
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}
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}
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);
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// TODO: this is not very pretty. We could find a better call syntax.
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2021-04-11 17:00:38 +08:00
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impl_constructors!(R, C; // Arguments for Matrix<T, ..., S>
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=> R: DimName, => C: DimName; // Type parameters for impl<T, ..., S>
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2020-11-15 23:57:49 +08:00
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R::name(), C::name(); // Arguments for `_generic` constructors.
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); // Arguments for non-generic constructors.
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impl_constructors!(R, Dynamic;
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=> R: DimName;
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R::name(), Dynamic::new(ncols);
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ncols);
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impl_constructors!(Dynamic, C;
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=> C: DimName;
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Dynamic::new(nrows), C::name();
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nrows);
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impl_constructors!(Dynamic, Dynamic;
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;
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Dynamic::new(nrows), Dynamic::new(ncols);
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nrows, ncols);
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/// # Creating mutable matrix slices from `&mut [T]`
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, R: Dim, C: Dim, RStride: Dim, CStride: Dim>
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MatrixSliceMutMN<'a, T, R, C, RStride, CStride>
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2018-04-27 13:53:08 +08:00
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{
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2018-02-02 19:26:40 +08:00
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/// Creates, without bound-checking, a mutable matrix slice from an array and with dimensions and strides specified by generic types instances.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// This method is unsafe because the input data array is not checked to contain enough elements.
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/// The generic types `R`, `C`, `RStride`, `CStride` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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2018-02-02 19:26:18 +08:00
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#[inline]
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2018-04-27 13:53:08 +08:00
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pub unsafe fn from_slice_with_strides_generic_unchecked(
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2021-04-11 17:00:38 +08:00
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data: &'a mut [T],
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2018-02-02 19:26:35 +08:00
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start: usize,
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nrows: R,
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ncols: C,
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rstride: RStride,
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cstride: CStride,
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2020-04-06 00:49:48 +08:00
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) -> Self {
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2018-02-02 19:26:35 +08:00
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let data = SliceStorageMut::from_raw_parts(
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2020-11-16 21:59:53 +08:00
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data.as_mut_ptr().add(start),
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2018-02-02 19:26:35 +08:00
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(nrows, ncols),
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(rstride, cstride),
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);
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2018-02-02 19:26:04 +08:00
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Self::from_data(data)
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}
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2018-02-02 19:26:40 +08:00
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/// Creates a mutable matrix slice from an array and with dimensions and strides specified by generic types instances.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// Panics if the input data array dose not contain enough elements.
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/// The generic types `R`, `C`, `RStride`, `CStride` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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2018-02-02 19:26:04 +08:00
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#[inline]
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2018-04-27 13:53:08 +08:00
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pub fn from_slice_with_strides_generic(
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2021-04-11 17:00:38 +08:00
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data: &'a mut [T],
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2018-02-02 19:26:35 +08:00
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nrows: R,
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ncols: C,
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rstride: RStride,
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cstride: CStride,
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2020-04-06 00:49:48 +08:00
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) -> Self {
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2018-02-02 19:26:04 +08:00
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// NOTE: The assertion implements the following formula, but without subtractions to avoid
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// underflow panics:
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// len >= (ncols - 1) * cstride + (nrows - 1) * rstride + 1
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2018-02-02 19:26:35 +08:00
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assert!(
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data.len() + cstride.value() + rstride.value()
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>= ncols.value() * cstride.value() + nrows.value() * rstride.value() + 1,
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"Matrix slice: input data buffer to small."
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);
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2018-02-02 19:26:04 +08:00
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2020-04-06 00:49:48 +08:00
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assert!(
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{
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let nrows = nrows.value();
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let ncols = ncols.value();
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let rstride = rstride.value();
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let cstride = cstride.value();
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2019-04-10 02:39:36 +08:00
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2020-04-06 00:49:48 +08:00
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nrows * ncols <= 1
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|| match (rstride, cstride) {
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(0, 0) => false, // otherwise: matrix[(0, 0)] == index[(nrows - 1, ncols - 1)],
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(0, _) => nrows <= 1, // otherwise: matrix[(0, 0)] == index[(nrows - 1, 0)],
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(_, 0) => ncols <= 1, // otherwise: matrix[(0, 0)] == index[(0, ncols - 1)],
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(_, _) => {
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// otherwise: matrix[(0, numer)] == index[(denom, 0)]
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let ratio = Ratio::new(rstride, cstride);
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nrows <= *ratio.denom() || ncols <= *ratio.numer()
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}
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2019-04-10 02:39:36 +08:00
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}
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},
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2020-04-06 00:49:48 +08:00
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"Matrix slice: dimensions and strides result in aliased indices."
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);
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2019-04-10 02:39:36 +08:00
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2018-02-02 19:26:18 +08:00
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unsafe {
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2018-04-27 13:53:08 +08:00
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Self::from_slice_with_strides_generic_unchecked(data, 0, nrows, ncols, rstride, cstride)
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2018-02-02 19:26:18 +08:00
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}
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2018-02-02 19:26:04 +08:00
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}
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}
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, R: Dim, C: Dim> MatrixSliceMutMN<'a, T, R, C> {
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2018-02-02 19:26:40 +08:00
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/// Creates, without bound-checking, a mutable matrix slice from an array and with dimensions specified by generic types instances.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// This method is unsafe because the input data array is not checked to contain enough elements.
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/// The generic types `R` and `C` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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2018-02-02 19:26:18 +08:00
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#[inline]
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2018-04-27 13:53:08 +08:00
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pub unsafe fn from_slice_generic_unchecked(
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2021-04-11 17:00:38 +08:00
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data: &'a mut [T],
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2018-02-02 19:26:35 +08:00
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start: usize,
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nrows: R,
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ncols: C,
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2020-04-06 00:49:48 +08:00
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) -> Self {
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2021-01-03 22:20:34 +08:00
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Self::from_slice_with_strides_generic_unchecked(
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data, start, nrows, ncols, Const::<1>, nrows,
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)
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2018-02-02 19:26:18 +08:00
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}
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2018-02-02 19:26:40 +08:00
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/// Creates a mutable matrix slice from an array and with dimensions and strides specified by generic types instances.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// Panics if the input data array dose not contain enough elements.
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/// The generic types `R` and `C` can either be type-level integers or integers wrapped with `Dynamic::new()`.
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2018-02-02 19:26:04 +08:00
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn from_slice_generic(data: &'a mut [T], nrows: R, ncols: C) -> Self {
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2021-01-03 22:20:34 +08:00
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Self::from_slice_with_strides_generic(data, nrows, ncols, Const::<1>, nrows)
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2018-02-02 19:26:04 +08:00
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}
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}
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macro_rules! impl_constructors_mut(
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($($Dims: ty),*; $(=> $DimIdent: ident: $DimBound: ident),*; $($gargs: expr),*; $($args: ident),*) => {
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, $($DimIdent: $DimBound),*> MatrixSliceMutMN<'a, T, $($Dims),*> {
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2018-02-02 19:26:40 +08:00
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/// Creates a new mutable matrix slice from the given data array.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// Panics if `data` does not contain enough elements.
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2018-02-02 19:26:04 +08:00
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn from_slice(data: &'a mut [T], $($args: usize),*) -> Self {
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2018-04-27 13:53:08 +08:00
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Self::from_slice_generic(data, $($gargs),*)
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2018-02-02 19:26:04 +08:00
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}
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2018-02-02 19:26:18 +08:00
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2018-02-02 19:26:40 +08:00
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/// Creates, without bound checking, a new mutable matrix slice from the given data array.
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2018-02-02 19:26:18 +08:00
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub unsafe fn from_slice_unchecked(data: &'a mut [T], start: usize, $($args: usize),*) -> Self {
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2018-04-27 13:53:08 +08:00
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Self::from_slice_generic_unchecked(data, start, $($gargs),*)
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2018-02-02 19:26:18 +08:00
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}
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2018-02-02 19:26:04 +08:00
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}
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2021-04-11 17:00:38 +08:00
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impl<'a, T: Scalar, $($DimIdent: $DimBound, )*> MatrixSliceMutMN<'a, T, $($Dims,)* Dynamic, Dynamic> {
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2018-02-02 19:26:40 +08:00
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/// Creates a new mutable matrix slice with the specified strides from the given data array.
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2018-04-27 13:53:08 +08:00
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///
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2018-02-02 19:26:40 +08:00
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/// Panics if `data` does not contain enough elements.
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2018-02-02 19:26:04 +08:00
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#[inline]
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2021-04-11 17:00:38 +08:00
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pub fn from_slice_with_strides_mut(data: &'a mut [T], $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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2018-04-27 13:53:08 +08:00
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Self::from_slice_with_strides_generic(
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2018-02-02 19:26:04 +08:00
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data, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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2018-02-02 19:26:18 +08:00
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}
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2018-02-02 19:26:40 +08:00
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/// Creates, without bound checking, a new mutable matrix slice with the specified strides from the given data array.
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2018-02-02 19:26:18 +08:00
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#[inline]
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2021-04-11 17:00:38 +08:00
|
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pub unsafe fn from_slice_with_strides_unchecked(data: &'a mut [T], start: usize, $($args: usize,)* rstride: usize, cstride: usize) -> Self {
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2018-04-27 13:53:08 +08:00
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Self::from_slice_with_strides_generic_unchecked(
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2018-02-02 19:26:18 +08:00
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data, start, $($gargs,)* Dynamic::new(rstride), Dynamic::new(cstride))
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2018-02-02 19:26:04 +08:00
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}
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}
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}
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);
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|
2020-11-15 23:57:49 +08:00
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// TODO: this is not very pretty. We could find a better call syntax.
|
2021-04-11 17:00:38 +08:00
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impl_constructors_mut!(R, C; // Arguments for Matrix<T, ..., S>
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|
=> R: DimName, => C: DimName; // Type parameters for impl<T, ..., S>
|
2020-06-07 15:07:25 +08:00
|
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|
R::name(), C::name(); // Arguments for `_generic` constructors.
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|
); // Arguments for non-generic constructors.
|
2018-02-02 19:26:04 +08:00
|
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|
impl_constructors_mut!(R, Dynamic;
|
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|
=> R: DimName;
|
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|
R::name(), Dynamic::new(ncols);
|
|
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|
ncols);
|
|
|
|
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|
|
|
impl_constructors_mut!(Dynamic, C;
|
|
|
|
|
=> C: DimName;
|
|
|
|
|
Dynamic::new(nrows), C::name();
|
|
|
|
|
nrows);
|
|
|
|
|
|
|
|
|
|
impl_constructors_mut!(Dynamic, Dynamic;
|
|
|
|
|
;
|
|
|
|
|
Dynamic::new(nrows), Dynamic::new(ncols);
|
|
|
|
|
nrows, ncols);
|