devtools/eigen
1
0
Fork 0
mirror of https://gitlab.com/libeigen/eigen.git synced 2026-04-10 11:34:33 +08:00
Code Issues Packages Projects Releases Wiki Activity

make fixed_size matrices conform to std::is_standard_layout

Browse Source
This commit is contained in:
Charles Schlosser
2024-11-12 23:34:26 +00:00
committed by Rasmus Munk Larsen
parent 283d871a3f
commit 489dbbc651
4 changed files with 603 additions and 297 deletions
Download Patch File Download Diff File Expand all files Collapse all files

44
test/MovableScalar.h
View File

@@ -10,24 +10,42 @@
#ifndef EIGEN_MISC_MOVABLE_SCALAR_H
#define EIGEN_MISC_MOVABLE_SCALAR_H
#include <vector>
namespace Eigen {
template <typename Scalar, typename Base = std::vector<Scalar>>
struct MovableScalar : public Base {
MovableScalar() = default;
~MovableScalar() = default;
MovableScalar(const MovableScalar&) = default;
MovableScalar(MovableScalar&& other) = default;
MovableScalar& operator=(const MovableScalar&) = default;
MovableScalar& operator=(MovableScalar&& other) = default;
MovableScalar(Scalar scalar) : Base(100, scalar) {}
template <typename Scalar>
struct MovableScalar {
MovableScalar() : m_data(new Scalar) {}
~MovableScalar() { delete m_data; }
MovableScalar(const MovableScalar& other) : m_data(new Scalar) { set(other.get()); }
MovableScalar(MovableScalar&& other) noexcept : m_data(other.m_data) { other.m_data = nullptr; }
MovableScalar& operator=(const MovableScalar& other) {
set(other.get());
return *this;
}
MovableScalar& operator=(MovableScalar&& other) noexcept {
m_data = other.m_data;
other.m_data = nullptr;
return *this;
}
MovableScalar(const Scalar& scalar) : m_data(new Scalar) { set(scalar); }
operator Scalar() const { return this->size() > 0 ? this->back() : Scalar(); }
operator Scalar() const { return get(); }
private:
void set(const Scalar& value) {
eigen_assert(m_data != nullptr);
// suppress compiler warnings
if (m_data != nullptr) *m_data = value;
}
Scalar get() const {
eigen_assert(m_data != nullptr);
// suppress compiler warnings
return m_data == nullptr ? Scalar() : *m_data;
}
Scalar* m_data = nullptr;
};
template <typename Scalar>
struct NumTraits<MovableScalar<Scalar>> : GenericNumTraits<Scalar> {
struct NumTraits<MovableScalar<Scalar>> : NumTraits<Scalar> {
enum { RequireInitialization = 1 };
};