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Yousef Khadadeh
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487
include/Eigen/src/Core/util/IndexedViewHelper.h
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487
include/Eigen/src/Core/util/IndexedViewHelper.h
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// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2017 Gael Guennebaud <gael.guennebaud@inria.fr>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_INDEXED_VIEW_HELPER_H
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#define EIGEN_INDEXED_VIEW_HELPER_H
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// IWYU pragma: private
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#include "../InternalHeaderCheck.h"
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namespace Eigen {
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namespace internal {
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struct symbolic_last_tag {};
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struct all_t {};
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} // namespace internal
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namespace placeholders {
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typedef symbolic::SymbolExpr<internal::symbolic_last_tag> last_t;
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/** \var last
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* \ingroup Core_Module
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*
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* Can be used as a parameter to Eigen::seq and Eigen::seqN functions to symbolically reference the last
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* element/row/columns of the underlying vector or matrix once passed to DenseBase::operator()(const RowIndices&, const
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* ColIndices&).
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*
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* This symbolic placeholder supports standard arithmetic operations.
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*
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* A typical usage example would be:
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* \code
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* using namespace Eigen;
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* using Eigen::placeholders::last;
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* VectorXd v(n);
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* v(seq(2,last-2)).setOnes();
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* \endcode
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*
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* \sa end
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*/
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static constexpr const last_t last;
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typedef symbolic::AddExpr<symbolic::SymbolExpr<internal::symbolic_last_tag>,
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symbolic::ValueExpr<Eigen::internal::FixedInt<1>>>
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lastp1_t;
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typedef Eigen::internal::all_t all_t;
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/** \var lastp1
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* \ingroup Core_Module
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*
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* Can be used as a parameter to Eigen::seq and Eigen::seqN functions to symbolically
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* reference the last+1 element/row/columns of the underlying vector or matrix once
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* passed to DenseBase::operator()(const RowIndices&, const ColIndices&).
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*
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* This symbolic placeholder supports standard arithmetic operations.
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* It is essentially an alias to last+fix<1>.
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*
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* \sa last
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*/
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#ifdef EIGEN_PARSED_BY_DOXYGEN
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static constexpr auto lastp1 = last + fix<1>;
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#else
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// Using a FixedExpr<1> expression is important here to make sure the compiler
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// can fully optimize the computation starting indices with zero overhead.
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static constexpr lastp1_t lastp1 = lastp1_t{};
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#endif
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/** \var end
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* \ingroup Core_Module
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* \sa lastp1
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*/
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static constexpr lastp1_t end = lastp1;
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/** \var all
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* \ingroup Core_Module
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* Can be used as a parameter to DenseBase::operator()(const RowIndices&, const ColIndices&) to index all rows or
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* columns
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*/
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static constexpr Eigen::internal::all_t all;
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} // namespace placeholders
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namespace internal {
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// Evaluate a symbolic expression or constant given the "size" of an object, allowing
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// any symbols like `last` to be evaluated. The default here assumes a dynamic constant.
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template <typename Expr, int SizeAtCompileTime, typename EnableIf = void>
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struct SymbolicExpressionEvaluator {
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static constexpr Index ValueAtCompileTime = Undefined;
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static Index eval(const Expr& expr, Index /*size*/) { return static_cast<Index>(expr); }
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};
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// Symbolic expression with size known at compile-time.
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template <typename Expr, int SizeAtCompileTime>
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struct SymbolicExpressionEvaluator<Expr, SizeAtCompileTime, std::enable_if_t<symbolic::is_symbolic<Expr>::value>> {
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static constexpr Index ValueAtCompileTime =
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Expr::Derived::eval_at_compile_time(Eigen::placeholders::last = fix<SizeAtCompileTime - 1>);
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static Index eval(const Expr& expr, Index /*size*/) {
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return expr.eval(Eigen::placeholders::last = fix<SizeAtCompileTime - 1>);
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}
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};
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// Symbolic expression with dynamic size.
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template <typename Expr>
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struct SymbolicExpressionEvaluator<Expr, Dynamic, std::enable_if_t<symbolic::is_symbolic<Expr>::value>> {
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static constexpr Index ValueAtCompileTime = Undefined;
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static Index eval(const Expr& expr, Index size) { return expr.eval(Eigen::placeholders::last = size - 1); }
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};
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// Fixed int.
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template <int N, int SizeAtCompileTime>
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struct SymbolicExpressionEvaluator<FixedInt<N>, SizeAtCompileTime, void> {
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static constexpr Index ValueAtCompileTime = static_cast<Index>(N);
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static Index eval(const FixedInt<N>& /*expr*/, Index /*size*/) { return ValueAtCompileTime; }
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};
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//--------------------------------------------------------------------------------
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// Handling of generic indices (e.g. array)
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//--------------------------------------------------------------------------------
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// Potentially wrap indices in a type that is better-suited for IndexedView evaluation.
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template <typename Indices, int NestedSizeAtCompileTime, typename EnableIf = void>
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struct IndexedViewHelperIndicesWrapper {
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using type = Indices;
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static const type& CreateIndexSequence(const Indices& indices, Index /*nested_size*/) { return indices; }
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};
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// Extract compile-time and runtime first, size, increments.
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template <typename Indices, typename EnableIf = void>
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struct IndexedViewHelper {
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static constexpr Index FirstAtCompileTime = Undefined;
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static constexpr Index SizeAtCompileTime = array_size<Indices>::value;
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static constexpr Index IncrAtCompileTime = Undefined;
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static constexpr Index first(const Indices& indices) { return static_cast<Index>(indices[0]); }
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static constexpr Index size(const Indices& indices) { return index_list_size(indices); }
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static constexpr Index incr(const Indices& /*indices*/) { return Undefined; }
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};
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//--------------------------------------------------------------------------------
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// Handling of ArithmeticSequence
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//--------------------------------------------------------------------------------
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template <Index FirstAtCompileTime_, Index SizeAtCompileTime_, Index IncrAtCompileTime_>
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class ArithmeticSequenceRange {
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public:
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static constexpr Index FirstAtCompileTime = FirstAtCompileTime_;
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static constexpr Index SizeAtCompileTime = SizeAtCompileTime_;
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static constexpr Index IncrAtCompileTime = IncrAtCompileTime_;
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constexpr ArithmeticSequenceRange(Index first, Index size, Index incr) : first_{first}, size_{size}, incr_{incr} {}
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constexpr Index operator[](Index i) const { return first() + i * incr(); }
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constexpr Index first() const noexcept { return first_.value(); }
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constexpr Index size() const noexcept { return size_.value(); }
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constexpr Index incr() const noexcept { return incr_.value(); }
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private:
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variable_if_dynamicindex<Index, int(FirstAtCompileTime)> first_;
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variable_if_dynamic<Index, int(SizeAtCompileTime)> size_;
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variable_if_dynamicindex<Index, int(IncrAtCompileTime)> incr_;
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};
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template <typename FirstType, typename SizeType, typename IncrType, int NestedSizeAtCompileTime>
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struct IndexedViewHelperIndicesWrapper<ArithmeticSequence<FirstType, SizeType, IncrType>, NestedSizeAtCompileTime,
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void> {
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static constexpr Index EvalFirstAtCompileTime =
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SymbolicExpressionEvaluator<FirstType, NestedSizeAtCompileTime>::ValueAtCompileTime;
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static constexpr Index EvalSizeAtCompileTime =
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SymbolicExpressionEvaluator<SizeType, NestedSizeAtCompileTime>::ValueAtCompileTime;
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static constexpr Index EvalIncrAtCompileTime =
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SymbolicExpressionEvaluator<IncrType, NestedSizeAtCompileTime>::ValueAtCompileTime;
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static constexpr Index FirstAtCompileTime =
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(int(EvalFirstAtCompileTime) == Undefined) ? Index(DynamicIndex) : EvalFirstAtCompileTime;
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static constexpr Index SizeAtCompileTime =
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(int(EvalSizeAtCompileTime) == Undefined) ? Index(Dynamic) : EvalSizeAtCompileTime;
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static constexpr Index IncrAtCompileTime =
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(int(EvalIncrAtCompileTime) == Undefined) ? Index(DynamicIndex) : EvalIncrAtCompileTime;
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using Indices = ArithmeticSequence<FirstType, SizeType, IncrType>;
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using type = ArithmeticSequenceRange<FirstAtCompileTime, SizeAtCompileTime, IncrAtCompileTime>;
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static type CreateIndexSequence(const Indices& indices, Index nested_size) {
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Index first =
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SymbolicExpressionEvaluator<FirstType, NestedSizeAtCompileTime>::eval(indices.firstObject(), nested_size);
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Index size =
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SymbolicExpressionEvaluator<SizeType, NestedSizeAtCompileTime>::eval(indices.sizeObject(), nested_size);
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Index incr =
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SymbolicExpressionEvaluator<IncrType, NestedSizeAtCompileTime>::eval(indices.incrObject(), nested_size);
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return type(first, size, incr);
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}
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};
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template <Index FirstAtCompileTime_, Index SizeAtCompileTime_, Index IncrAtCompileTime_>
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struct IndexedViewHelper<ArithmeticSequenceRange<FirstAtCompileTime_, SizeAtCompileTime_, IncrAtCompileTime_>, void> {
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public:
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using Indices = ArithmeticSequenceRange<FirstAtCompileTime_, SizeAtCompileTime_, IncrAtCompileTime_>;
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static constexpr Index FirstAtCompileTime = Indices::FirstAtCompileTime;
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static constexpr Index SizeAtCompileTime = Indices::SizeAtCompileTime;
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static constexpr Index IncrAtCompileTime = Indices::IncrAtCompileTime;
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static Index first(const Indices& indices) { return indices.first(); }
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static Index size(const Indices& indices) { return indices.size(); }
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static Index incr(const Indices& indices) { return indices.incr(); }
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};
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//--------------------------------------------------------------------------------
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// Handling of a single index.
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//--------------------------------------------------------------------------------
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template <Index ValueAtCompileTime>
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class SingleRange {
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public:
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static constexpr Index FirstAtCompileTime = ValueAtCompileTime;
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static constexpr Index SizeAtCompileTime = Index(1);
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static constexpr Index IncrAtCompileTime = Index(1); // Needs to be 1 to be treated as block-like.
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constexpr SingleRange(Index v) noexcept : value_(v) {}
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constexpr Index operator[](Index) const noexcept { return first(); }
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constexpr Index first() const noexcept { return value_.value(); }
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constexpr Index size() const noexcept { return SizeAtCompileTime; }
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constexpr Index incr() const noexcept { return IncrAtCompileTime; }
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private:
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variable_if_dynamicindex<Index, int(ValueAtCompileTime)> value_;
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};
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template <typename T>
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struct is_single_range : public std::false_type {};
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template <Index ValueAtCompileTime>
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struct is_single_range<SingleRange<ValueAtCompileTime>> : public std::true_type {};
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template <typename SingleIndex, int NestedSizeAtCompileTime>
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struct IndexedViewHelperIndicesWrapper<
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SingleIndex, NestedSizeAtCompileTime,
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std::enable_if_t<std::is_integral<SingleIndex>::value || symbolic::is_symbolic<SingleIndex>::value>> {
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static constexpr Index EvalValueAtCompileTime =
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SymbolicExpressionEvaluator<SingleIndex, NestedSizeAtCompileTime>::ValueAtCompileTime;
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static constexpr Index ValueAtCompileTime =
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(int(EvalValueAtCompileTime) == Undefined) ? Index(DynamicIndex) : EvalValueAtCompileTime;
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using type = SingleRange<ValueAtCompileTime>;
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static type CreateIndexSequence(const SingleIndex& index, Index nested_size) {
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return type(SymbolicExpressionEvaluator<SingleIndex, NestedSizeAtCompileTime>::eval(index, nested_size));
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}
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};
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template <int N, int NestedSizeAtCompileTime>
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struct IndexedViewHelperIndicesWrapper<FixedInt<N>, NestedSizeAtCompileTime, void> {
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using type = SingleRange<Index(N)>;
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static type CreateIndexSequence(const FixedInt<N>& /*index*/) { return type(Index(N)); }
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};
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template <Index ValueAtCompileTime>
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struct IndexedViewHelper<SingleRange<ValueAtCompileTime>, void> {
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using Indices = SingleRange<ValueAtCompileTime>;
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static constexpr Index FirstAtCompileTime = Indices::FirstAtCompileTime;
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static constexpr Index SizeAtCompileTime = Indices::SizeAtCompileTime;
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static constexpr Index IncrAtCompileTime = Indices::IncrAtCompileTime;
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static constexpr Index first(const Indices& indices) { return indices.first(); }
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static constexpr Index size(const Indices& /*indices*/) { return SizeAtCompileTime; }
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static constexpr Index incr(const Indices& /*indices*/) { return IncrAtCompileTime; }
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};
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//--------------------------------------------------------------------------------
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// Handling of all
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//--------------------------------------------------------------------------------
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// Convert a symbolic 'all' into a usable range type
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template <Index SizeAtCompileTime_>
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class AllRange {
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public:
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static constexpr Index FirstAtCompileTime = Index(0);
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static constexpr Index SizeAtCompileTime = SizeAtCompileTime_;
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static constexpr Index IncrAtCompileTime = Index(1);
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constexpr AllRange(Index size) : size_(size) {}
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constexpr Index operator[](Index i) const noexcept { return i; }
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constexpr Index first() const noexcept { return FirstAtCompileTime; }
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constexpr Index size() const noexcept { return size_.value(); }
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constexpr Index incr() const noexcept { return IncrAtCompileTime; }
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private:
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variable_if_dynamic<Index, int(SizeAtCompileTime)> size_;
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};
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template <int NestedSizeAtCompileTime>
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struct IndexedViewHelperIndicesWrapper<all_t, NestedSizeAtCompileTime, void> {
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using type = AllRange<Index(NestedSizeAtCompileTime)>;
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static type CreateIndexSequence(const all_t& /*indices*/, Index nested_size) { return type(nested_size); }
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};
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template <Index SizeAtCompileTime_>
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struct IndexedViewHelper<AllRange<SizeAtCompileTime_>, void> {
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using Indices = AllRange<SizeAtCompileTime_>;
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static constexpr Index FirstAtCompileTime = Indices::FirstAtCompileTime;
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static constexpr Index SizeAtCompileTime = Indices::SizeAtCompileTime;
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static constexpr Index IncrAtCompileTime = Indices::IncrAtCompileTime;
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static Index first(const Indices& indices) { return indices.first(); }
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static Index size(const Indices& indices) { return indices.size(); }
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static Index incr(const Indices& indices) { return indices.incr(); }
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};
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// this helper class assumes internal::valid_indexed_view_overload<RowIndices, ColIndices>::value == true
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template <typename Derived, typename RowIndices, typename ColIndices, typename EnableIf = void>
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struct IndexedViewSelector;
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template <typename Indices, int SizeAtCompileTime>
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using IvcType = typename internal::IndexedViewHelperIndicesWrapper<Indices, SizeAtCompileTime>::type;
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template <int SizeAtCompileTime, typename Indices>
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inline IvcType<Indices, SizeAtCompileTime> CreateIndexSequence(size_t size, const Indices& indices) {
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return internal::IndexedViewHelperIndicesWrapper<Indices, SizeAtCompileTime>::CreateIndexSequence(indices, size);
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}
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// Generic
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template <typename Derived, typename RowIndices, typename ColIndices>
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struct IndexedViewSelector<Derived, RowIndices, ColIndices,
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std::enable_if_t<internal::traits<
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IndexedView<Derived, IvcType<RowIndices, Derived::RowsAtCompileTime>,
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IvcType<ColIndices, Derived::ColsAtCompileTime>>>::ReturnAsIndexedView>> {
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using ReturnType = IndexedView<Derived, IvcType<RowIndices, Derived::RowsAtCompileTime>,
|
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IvcType<ColIndices, Derived::ColsAtCompileTime>>;
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using ConstReturnType = IndexedView<const Derived, IvcType<RowIndices, Derived::RowsAtCompileTime>,
|
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IvcType<ColIndices, Derived::ColsAtCompileTime>>;
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static inline ReturnType run(Derived& derived, const RowIndices& rowIndices, const ColIndices& colIndices) {
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return ReturnType(derived, CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), rowIndices),
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CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), colIndices));
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}
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static inline ConstReturnType run(const Derived& derived, const RowIndices& rowIndices,
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const ColIndices& colIndices) {
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return ConstReturnType(derived, CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), rowIndices),
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CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), colIndices));
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||||
}
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||||
};
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// Block
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||||
template <typename Derived, typename RowIndices, typename ColIndices>
|
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struct IndexedViewSelector<
|
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Derived, RowIndices, ColIndices,
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std::enable_if_t<internal::traits<IndexedView<Derived, IvcType<RowIndices, Derived::RowsAtCompileTime>,
|
||||
IvcType<ColIndices, Derived::ColsAtCompileTime>>>::ReturnAsBlock>> {
|
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using ActualRowIndices = IvcType<RowIndices, Derived::RowsAtCompileTime>;
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using ActualColIndices = IvcType<ColIndices, Derived::ColsAtCompileTime>;
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using IndexedViewType = IndexedView<Derived, ActualRowIndices, ActualColIndices>;
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using ConstIndexedViewType = IndexedView<const Derived, ActualRowIndices, ActualColIndices>;
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||||
using ReturnType = typename internal::traits<IndexedViewType>::BlockType;
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||||
using ConstReturnType = typename internal::traits<ConstIndexedViewType>::BlockType;
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||||
using RowHelper = internal::IndexedViewHelper<ActualRowIndices>;
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||||
using ColHelper = internal::IndexedViewHelper<ActualColIndices>;
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||||
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||||
static inline ReturnType run(Derived& derived, const RowIndices& rowIndices, const ColIndices& colIndices) {
|
||||
auto actualRowIndices = CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), rowIndices);
|
||||
auto actualColIndices = CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), colIndices);
|
||||
return ReturnType(derived, RowHelper::first(actualRowIndices), ColHelper::first(actualColIndices),
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||||
RowHelper::size(actualRowIndices), ColHelper::size(actualColIndices));
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||||
}
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||||
static inline ConstReturnType run(const Derived& derived, const RowIndices& rowIndices,
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||||
const ColIndices& colIndices) {
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||||
auto actualRowIndices = CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), rowIndices);
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||||
auto actualColIndices = CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), colIndices);
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||||
return ConstReturnType(derived, RowHelper::first(actualRowIndices), ColHelper::first(actualColIndices),
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||||
RowHelper::size(actualRowIndices), ColHelper::size(actualColIndices));
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||||
}
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||||
};
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||||
|
||||
// Scalar
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||||
template <typename Derived, typename RowIndices, typename ColIndices>
|
||||
struct IndexedViewSelector<
|
||||
Derived, RowIndices, ColIndices,
|
||||
std::enable_if_t<internal::traits<IndexedView<Derived, IvcType<RowIndices, Derived::RowsAtCompileTime>,
|
||||
IvcType<ColIndices, Derived::ColsAtCompileTime>>>::ReturnAsScalar>> {
|
||||
using ReturnType = typename DenseBase<Derived>::Scalar&;
|
||||
using ConstReturnType = typename DenseBase<Derived>::CoeffReturnType;
|
||||
using ActualRowIndices = IvcType<RowIndices, Derived::RowsAtCompileTime>;
|
||||
using ActualColIndices = IvcType<ColIndices, Derived::ColsAtCompileTime>;
|
||||
using RowHelper = internal::IndexedViewHelper<ActualRowIndices>;
|
||||
using ColHelper = internal::IndexedViewHelper<ActualColIndices>;
|
||||
static inline ReturnType run(Derived& derived, const RowIndices& rowIndices, const ColIndices& colIndices) {
|
||||
auto actualRowIndices = CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), rowIndices);
|
||||
auto actualColIndices = CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), colIndices);
|
||||
return derived(RowHelper::first(actualRowIndices), ColHelper::first(actualColIndices));
|
||||
}
|
||||
static inline ConstReturnType run(const Derived& derived, const RowIndices& rowIndices,
|
||||
const ColIndices& colIndices) {
|
||||
auto actualRowIndices = CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), rowIndices);
|
||||
auto actualColIndices = CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), colIndices);
|
||||
return derived(RowHelper::first(actualRowIndices), ColHelper::first(actualColIndices));
|
||||
}
|
||||
};
|
||||
|
||||
// this helper class assumes internal::is_valid_index_type<Indices>::value == false
|
||||
template <typename Derived, typename Indices, typename EnableIf = void>
|
||||
struct VectorIndexedViewSelector;
|
||||
|
||||
// Generic
|
||||
template <typename Derived, typename Indices>
|
||||
struct VectorIndexedViewSelector<
|
||||
Derived, Indices,
|
||||
std::enable_if_t<!internal::is_single_range<IvcType<Indices, Derived::SizeAtCompileTime>>::value &&
|
||||
internal::IndexedViewHelper<IvcType<Indices, Derived::SizeAtCompileTime>>::IncrAtCompileTime !=
|
||||
1>> {
|
||||
static constexpr bool IsRowMajor = DenseBase<Derived>::IsRowMajor;
|
||||
using ZeroIndex = internal::SingleRange<Index(0)>;
|
||||
using RowMajorReturnType = IndexedView<Derived, ZeroIndex, IvcType<Indices, Derived::SizeAtCompileTime>>;
|
||||
using ConstRowMajorReturnType = IndexedView<const Derived, ZeroIndex, IvcType<Indices, Derived::SizeAtCompileTime>>;
|
||||
|
||||
using ColMajorReturnType = IndexedView<Derived, IvcType<Indices, Derived::SizeAtCompileTime>, ZeroIndex>;
|
||||
using ConstColMajorReturnType = IndexedView<const Derived, IvcType<Indices, Derived::SizeAtCompileTime>, ZeroIndex>;
|
||||
|
||||
using ReturnType = typename internal::conditional<IsRowMajor, RowMajorReturnType, ColMajorReturnType>::type;
|
||||
using ConstReturnType =
|
||||
typename internal::conditional<IsRowMajor, ConstRowMajorReturnType, ConstColMajorReturnType>::type;
|
||||
|
||||
template <bool UseRowMajor = IsRowMajor, std::enable_if_t<UseRowMajor, bool> = true>
|
||||
static inline RowMajorReturnType run(Derived& derived, const Indices& indices) {
|
||||
return RowMajorReturnType(derived, ZeroIndex(0),
|
||||
CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), indices));
|
||||
}
|
||||
template <bool UseRowMajor = IsRowMajor, std::enable_if_t<UseRowMajor, bool> = true>
|
||||
static inline ConstRowMajorReturnType run(const Derived& derived, const Indices& indices) {
|
||||
return ConstRowMajorReturnType(derived, ZeroIndex(0),
|
||||
CreateIndexSequence<Derived::ColsAtCompileTime>(derived.cols(), indices));
|
||||
}
|
||||
template <bool UseRowMajor = IsRowMajor, std::enable_if_t<!UseRowMajor, bool> = true>
|
||||
static inline ColMajorReturnType run(Derived& derived, const Indices& indices) {
|
||||
return ColMajorReturnType(derived, CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), indices),
|
||||
ZeroIndex(0));
|
||||
}
|
||||
template <bool UseRowMajor = IsRowMajor, std::enable_if_t<!UseRowMajor, bool> = true>
|
||||
static inline ConstColMajorReturnType run(const Derived& derived, const Indices& indices) {
|
||||
return ConstColMajorReturnType(derived, CreateIndexSequence<Derived::RowsAtCompileTime>(derived.rows(), indices),
|
||||
ZeroIndex(0));
|
||||
}
|
||||
};
|
||||
|
||||
// Block
|
||||
template <typename Derived, typename Indices>
|
||||
struct VectorIndexedViewSelector<
|
||||
Derived, Indices,
|
||||
std::enable_if_t<!internal::is_single_range<IvcType<Indices, Derived::SizeAtCompileTime>>::value &&
|
||||
internal::IndexedViewHelper<IvcType<Indices, Derived::SizeAtCompileTime>>::IncrAtCompileTime ==
|
||||
1>> {
|
||||
using Helper = internal::IndexedViewHelper<IvcType<Indices, Derived::SizeAtCompileTime>>;
|
||||
using ReturnType = VectorBlock<Derived, Helper::SizeAtCompileTime>;
|
||||
using ConstReturnType = VectorBlock<const Derived, Helper::SizeAtCompileTime>;
|
||||
static inline ReturnType run(Derived& derived, const Indices& indices) {
|
||||
auto actualIndices = CreateIndexSequence<Derived::SizeAtCompileTime>(derived.size(), indices);
|
||||
return ReturnType(derived, Helper::first(actualIndices), Helper::size(actualIndices));
|
||||
}
|
||||
static inline ConstReturnType run(const Derived& derived, const Indices& indices) {
|
||||
auto actualIndices = CreateIndexSequence<Derived::SizeAtCompileTime>(derived.size(), indices);
|
||||
return ConstReturnType(derived, Helper::first(actualIndices), Helper::size(actualIndices));
|
||||
}
|
||||
};
|
||||
|
||||
// Symbolic
|
||||
template <typename Derived, typename Indices>
|
||||
struct VectorIndexedViewSelector<
|
||||
Derived, Indices,
|
||||
std::enable_if_t<internal::is_single_range<IvcType<Indices, Derived::SizeAtCompileTime>>::value>> {
|
||||
using ReturnType = typename DenseBase<Derived>::Scalar&;
|
||||
using ConstReturnType = typename DenseBase<Derived>::CoeffReturnType;
|
||||
using Helper = internal::IndexedViewHelper<IvcType<Indices, Derived::SizeAtCompileTime>>;
|
||||
static inline ReturnType run(Derived& derived, const Indices& indices) {
|
||||
auto actualIndices = CreateIndexSequence<Derived::SizeAtCompileTime>(derived.size(), indices);
|
||||
return derived(Helper::first(actualIndices));
|
||||
}
|
||||
static inline ConstReturnType run(const Derived& derived, const Indices& indices) {
|
||||
auto actualIndices = CreateIndexSequence<Derived::SizeAtCompileTime>(derived.size(), indices);
|
||||
return derived(Helper::first(actualIndices));
|
||||
}
|
||||
};
|
||||
|
||||
} // end namespace internal
|
||||
|
||||
} // end namespace Eigen
|
||||
|
||||
#endif // EIGEN_INDEXED_VIEW_HELPER_H
|
||||
Loading…
Add table
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Reference in a new issue