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Allow std::initializer_list constructors in constexpr expressions

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Alexander Richardson 2022-12-14 17:05:37 +00:00 committed by Rasmus Munk Larsen
parent 6d3e3678b4
commit 62de593c40
7 changed files with 213 additions and 196 deletions
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5
Eigen/src/Core/Array.h
View File

@ -193,8 +193,9 @@ class Array
* *
* \sa Array(const Scalar& a0, const Scalar& a1, const Scalar& a2, const Scalar& a3, const ArgTypes&... args) * \sa Array(const Scalar& a0, const Scalar& a1, const Scalar& a2, const Scalar& a3, const ArgTypes&... args)
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr Array(
EIGEN_STRONG_INLINE Array(const std::initializer_list<std::initializer_list<Scalar>>& list) : Base(list) {} const std::initializer_list<std::initializer_list<Scalar>>& list)
: Base(list) {}
#ifndef EIGEN_PARSED_BY_DOXYGEN #ifndef EIGEN_PARSED_BY_DOXYGEN
template<typename T> template<typename T>

3
Eigen/src/Core/DenseBase.h
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@ -670,8 +670,7 @@ template<typename Derived> class DenseBase
protected: protected:
EIGEN_DEFAULT_COPY_CONSTRUCTOR(DenseBase) EIGEN_DEFAULT_COPY_CONSTRUCTOR(DenseBase)
/** Default constructor. Do nothing. */ /** Default constructor. Do nothing. */
EIGEN_DEVICE_FUNC DenseBase() EIGEN_DEVICE_FUNC constexpr DenseBase() {
{
/* Just checks for self-consistency of the flags. /* Just checks for self-consistency of the flags.
* Only do it when debugging Eigen, as this borders on paranoia and could slow compilation down * Only do it when debugging Eigen, as this borders on paranoia and could slow compilation down
*/ */

249
Eigen/src/Core/DenseStorage.h
View File

@ -26,14 +26,12 @@ namespace internal {
struct constructor_without_unaligned_array_assert {}; struct constructor_without_unaligned_array_assert {};
template<typename T, int Size> template <typename T, int Size>
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr void check_static_allocation_size() {
void check_static_allocation_size() // if EIGEN_STACK_ALLOCATION_LIMIT is defined to 0, then no limit
{ #if EIGEN_STACK_ALLOCATION_LIMIT
// if EIGEN_STACK_ALLOCATION_LIMIT is defined to 0, then no limit
#if EIGEN_STACK_ALLOCATION_LIMIT
EIGEN_STATIC_ASSERT(Size * sizeof(T) <= EIGEN_STACK_ALLOCATION_LIMIT, OBJECT_ALLOCATED_ON_STACK_IS_TOO_BIG); EIGEN_STATIC_ASSERT(Size * sizeof(T) <= EIGEN_STACK_ALLOCATION_LIMIT, OBJECT_ALLOCATED_ON_STACK_IS_TOO_BIG);
#endif #endif
} }
/** \internal /** \internal
@ -47,16 +45,10 @@ struct plain_array
{ {
T array[Size]; T array[Size];
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array() { check_static_allocation_size<T, Size>(); }
plain_array()
{
check_static_allocation_size<T,Size>();
}
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array(constructor_without_unaligned_array_assert) {
plain_array(constructor_without_unaligned_array_assert) check_static_allocation_size<T, Size>();
{
check_static_allocation_size<T,Size>();
} }
}; };
@ -87,17 +79,13 @@ struct plain_array<T, Size, MatrixOrArrayOptions, 8>
{ {
EIGEN_ALIGN_TO_BOUNDARY(8) T array[Size]; EIGEN_ALIGN_TO_BOUNDARY(8) T array[Size];
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array() {
plain_array()
{
EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(7); EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(7);
check_static_allocation_size<T,Size>(); check_static_allocation_size<T,Size>();
} }
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array(constructor_without_unaligned_array_assert) {
plain_array(constructor_without_unaligned_array_assert) check_static_allocation_size<T, Size>();
{
check_static_allocation_size<T,Size>();
} }
}; };
@ -106,17 +94,13 @@ struct plain_array<T, Size, MatrixOrArrayOptions, 16>
{ {
EIGEN_ALIGN_TO_BOUNDARY(16) T array[Size]; EIGEN_ALIGN_TO_BOUNDARY(16) T array[Size];
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array() {
plain_array()
{
EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(15); EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(15);
check_static_allocation_size<T,Size>(); check_static_allocation_size<T,Size>();
} }
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array(constructor_without_unaligned_array_assert) {
plain_array(constructor_without_unaligned_array_assert) check_static_allocation_size<T, Size>();
{
check_static_allocation_size<T,Size>();
} }
}; };
@ -125,17 +109,13 @@ struct plain_array<T, Size, MatrixOrArrayOptions, 32>
{ {
EIGEN_ALIGN_TO_BOUNDARY(32) T array[Size]; EIGEN_ALIGN_TO_BOUNDARY(32) T array[Size];
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array() {
plain_array()
{
EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(31); EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(31);
check_static_allocation_size<T,Size>(); check_static_allocation_size<T,Size>();
} }
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array(constructor_without_unaligned_array_assert) {
plain_array(constructor_without_unaligned_array_assert) check_static_allocation_size<T, Size>();
{
check_static_allocation_size<T,Size>();
} }
}; };
@ -144,17 +124,13 @@ struct plain_array<T, Size, MatrixOrArrayOptions, 64>
{ {
EIGEN_ALIGN_TO_BOUNDARY(64) T array[Size]; EIGEN_ALIGN_TO_BOUNDARY(64) T array[Size];
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array() {
plain_array()
{
EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(63); EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT(63);
check_static_allocation_size<T,Size>(); check_static_allocation_size<T,Size>();
} }
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr plain_array(constructor_without_unaligned_array_assert) {
plain_array(constructor_without_unaligned_array_assert) check_static_allocation_size<T, Size>();
{
check_static_allocation_size<T,Size>();
} }
}; };
@ -162,8 +138,8 @@ template <typename T, int MatrixOrArrayOptions, int Alignment>
struct plain_array<T, 0, MatrixOrArrayOptions, Alignment> struct plain_array<T, 0, MatrixOrArrayOptions, Alignment>
{ {
T array[1]; T array[1];
EIGEN_DEVICE_FUNC plain_array() {} EIGEN_DEVICE_FUNC constexpr plain_array() {}
EIGEN_DEVICE_FUNC plain_array(constructor_without_unaligned_array_assert) {} EIGEN_DEVICE_FUNC constexpr plain_array(constructor_without_unaligned_array_assert) {}
}; };
struct plain_array_helper { struct plain_array_helper {
@ -211,26 +187,25 @@ template<typename T, int Size, int Rows_, int Cols_, int Options_> class DenseSt
{ {
internal::plain_array<T,Size,Options_> m_data; internal::plain_array<T,Size,Options_> m_data;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() { constexpr EIGEN_DEVICE_FUNC DenseStorage() {
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN(Index size = Size) EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN(Index size = Size)
} }
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert)
explicit DenseStorage(internal::constructor_without_unaligned_array_assert)
: m_data(internal::constructor_without_unaligned_array_assert()) {} : m_data(internal::constructor_without_unaligned_array_assert()) {}
#if defined(EIGEN_DENSE_STORAGE_CTOR_PLUGIN) #if defined(EIGEN_DENSE_STORAGE_CTOR_PLUGIN)
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC constexpr
DenseStorage(const DenseStorage& other) : m_data(other.m_data) { DenseStorage(const DenseStorage& other) : m_data(other.m_data) {
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN(Index size = Size) EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN(Index size = Size)
} }
#else #else
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage&) = default; EIGEN_DEVICE_FUNC constexpr DenseStorage(const DenseStorage&) = default;
#endif #endif
EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage&) = default; EIGEN_DEVICE_FUNC constexpr DenseStorage& operator=(const DenseStorage&) = default;
EIGEN_DEVICE_FUNC DenseStorage(DenseStorage&&) = default; EIGEN_DEVICE_FUNC constexpr DenseStorage(DenseStorage&&) = default;
EIGEN_DEVICE_FUNC DenseStorage& operator=(DenseStorage&&) = default; EIGEN_DEVICE_FUNC constexpr DenseStorage& operator=(DenseStorage&&) = default;
EIGEN_DEVICE_FUNC DenseStorage(Index size, Index rows, Index cols) { EIGEN_DEVICE_FUNC constexpr DenseStorage(Index size, Index rows, Index cols) {
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({}) EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({})
eigen_internal_assert(size==rows*cols && rows==Rows_ && cols==Cols_); eigen_internal_assert(size == rows * cols && rows == Rows_ && cols == Cols_);
EIGEN_UNUSED_VARIABLE(size); EIGEN_UNUSED_VARIABLE(size);
EIGEN_UNUSED_VARIABLE(rows); EIGEN_UNUSED_VARIABLE(rows);
EIGEN_UNUSED_VARIABLE(cols); EIGEN_UNUSED_VARIABLE(cols);
@ -238,12 +213,12 @@ template<typename T, int Size, int Rows_, int Cols_, int Options_> class DenseSt
EIGEN_DEVICE_FUNC void swap(DenseStorage& other) { EIGEN_DEVICE_FUNC void swap(DenseStorage& other) {
numext::swap(m_data, other.m_data); numext::swap(m_data, other.m_data);
} }
EIGEN_DEVICE_FUNC static EIGEN_CONSTEXPR Index rows(void) EIGEN_NOEXCEPT {return Rows_;} EIGEN_DEVICE_FUNC static constexpr Index rows(void) EIGEN_NOEXCEPT { return Rows_; }
EIGEN_DEVICE_FUNC static EIGEN_CONSTEXPR Index cols(void) EIGEN_NOEXCEPT {return Cols_;} EIGEN_DEVICE_FUNC static constexpr Index cols(void) EIGEN_NOEXCEPT { return Cols_; }
EIGEN_DEVICE_FUNC void conservativeResize(Index,Index,Index) {} EIGEN_DEVICE_FUNC constexpr void conservativeResize(Index, Index, Index) {}
EIGEN_DEVICE_FUNC void resize(Index,Index,Index) {} EIGEN_DEVICE_FUNC constexpr void resize(Index, Index, Index) {}
EIGEN_DEVICE_FUNC const T *data() const { return m_data.array; } EIGEN_DEVICE_FUNC constexpr const T* data() const { return m_data.array; }
EIGEN_DEVICE_FUNC T *data() { return m_data.array; } EIGEN_DEVICE_FUNC constexpr T* data() { return m_data.array; }
}; };
// null matrix // null matrix
@ -252,18 +227,18 @@ class DenseStorage<T, 0, Rows_, Cols_, Options_>
{ {
public: public:
static_assert(Rows_ * Cols_ == 0, "The fixed number of rows times columns must equal the storage size."); static_assert(Rows_ * Cols_ == 0, "The fixed number of rows times columns must equal the storage size.");
EIGEN_DEVICE_FUNC DenseStorage() {} EIGEN_DEVICE_FUNC constexpr DenseStorage() {}
EIGEN_DEVICE_FUNC explicit DenseStorage(internal::constructor_without_unaligned_array_assert) {} EIGEN_DEVICE_FUNC explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert) {}
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage&) {} EIGEN_DEVICE_FUNC constexpr DenseStorage(const DenseStorage&) {}
EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage&) { return *this; } EIGEN_DEVICE_FUNC constexpr DenseStorage& operator=(const DenseStorage&) { return *this; }
EIGEN_DEVICE_FUNC DenseStorage(Index,Index,Index) {} EIGEN_DEVICE_FUNC constexpr DenseStorage(Index,Index,Index) {}
EIGEN_DEVICE_FUNC void swap(DenseStorage& ) {} EIGEN_DEVICE_FUNC constexpr void swap(DenseStorage& ) {}
EIGEN_DEVICE_FUNC static EIGEN_CONSTEXPR Index rows(void) EIGEN_NOEXCEPT {return Rows_;} EIGEN_DEVICE_FUNC static constexpr Index rows(void) EIGEN_NOEXCEPT {return Rows_;}
EIGEN_DEVICE_FUNC static EIGEN_CONSTEXPR Index cols(void) EIGEN_NOEXCEPT {return Cols_;} EIGEN_DEVICE_FUNC static constexpr Index cols(void) EIGEN_NOEXCEPT {return Cols_;}
EIGEN_DEVICE_FUNC void conservativeResize(Index,Index,Index) {} EIGEN_DEVICE_FUNC constexpr void conservativeResize(Index,Index,Index) {}
EIGEN_DEVICE_FUNC void resize(Index,Index,Index) {} EIGEN_DEVICE_FUNC constexpr void resize(Index,Index,Index) {}
EIGEN_DEVICE_FUNC const T *data() const { return 0; } EIGEN_DEVICE_FUNC constexpr const T *data() const { return 0; }
EIGEN_DEVICE_FUNC T *data() { return 0; } EIGEN_DEVICE_FUNC constexpr T *data() { return 0; }
}; };
// more specializations for null matrices; these are necessary to resolve ambiguities // more specializations for null matrices; these are necessary to resolve ambiguities
@ -373,14 +348,13 @@ class DenseStorage<T, Size, Dynamic, Dynamic, Options_>
Index m_rows; Index m_rows;
Index m_cols; Index m_cols;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() : m_rows(0), m_cols(0) {} EIGEN_DEVICE_FUNC constexpr DenseStorage() : m_data(), m_rows(0), m_cols(0) {}
EIGEN_DEVICE_FUNC explicit DenseStorage(internal::constructor_without_unaligned_array_assert) EIGEN_DEVICE_FUNC explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert)
: m_data(internal::constructor_without_unaligned_array_assert()), m_rows(0), m_cols(0) {} : m_data(internal::constructor_without_unaligned_array_assert()), m_rows(0), m_cols(0) {}
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other) EIGEN_DEVICE_FUNC constexpr DenseStorage(const DenseStorage& other)
: m_data(internal::constructor_without_unaligned_array_assert()), m_rows(other.m_rows), m_cols(other.m_cols) : m_data(internal::constructor_without_unaligned_array_assert()), m_rows(other.m_rows), m_cols(other.m_cols) {
{ internal::plain_array_helper::copy(other.m_data, m_rows * m_cols, m_data);
internal::plain_array_helper::copy(other.m_data, m_rows * m_cols, m_data); }
}
EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage& other) EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage& other)
{ {
if (this != &other) if (this != &other)
@ -391,19 +365,25 @@ class DenseStorage<T, Size, Dynamic, Dynamic, Options_>
} }
return *this; return *this;
} }
EIGEN_DEVICE_FUNC DenseStorage(Index, Index rows, Index cols) : m_rows(rows), m_cols(cols) {} EIGEN_DEVICE_FUNC constexpr DenseStorage(Index, Index rows, Index cols) : m_rows(rows), m_cols(cols) {}
EIGEN_DEVICE_FUNC void swap(DenseStorage& other) EIGEN_DEVICE_FUNC void swap(DenseStorage& other)
{ {
internal::plain_array_helper::swap(m_data, m_rows * m_cols, other.m_data, other.m_rows * other.m_cols); internal::plain_array_helper::swap(m_data, m_rows * m_cols, other.m_data, other.m_rows * other.m_cols);
numext::swap(m_rows,other.m_rows); numext::swap(m_rows,other.m_rows);
numext::swap(m_cols,other.m_cols); numext::swap(m_cols,other.m_cols);
} }
EIGEN_DEVICE_FUNC Index rows() const {return m_rows;} EIGEN_DEVICE_FUNC constexpr Index rows() const { return m_rows; }
EIGEN_DEVICE_FUNC Index cols() const {return m_cols;} EIGEN_DEVICE_FUNC constexpr Index cols() const { return m_cols; }
EIGEN_DEVICE_FUNC void conservativeResize(Index, Index rows, Index cols) { m_rows = rows; m_cols = cols; } EIGEN_DEVICE_FUNC constexpr void conservativeResize(Index, Index rows, Index cols) {
EIGEN_DEVICE_FUNC void resize(Index, Index rows, Index cols) { m_rows = rows; m_cols = cols; } m_rows = rows;
EIGEN_DEVICE_FUNC const T *data() const { return m_data.array; } m_cols = cols;
EIGEN_DEVICE_FUNC T *data() { return m_data.array; } }
EIGEN_DEVICE_FUNC constexpr void resize(Index, Index rows, Index cols) {
m_rows = rows;
m_cols = cols;
}
EIGEN_DEVICE_FUNC constexpr const T* data() const { return m_data.array; }
EIGEN_DEVICE_FUNC constexpr T* data() { return m_data.array; }
}; };
// dynamic-size matrix with fixed-size storage and fixed width // dynamic-size matrix with fixed-size storage and fixed width
@ -413,15 +393,14 @@ class DenseStorage<T, Size, Dynamic, Cols_, Options_>
internal::plain_array<T,Size,Options_> m_data; internal::plain_array<T,Size,Options_> m_data;
Index m_rows; Index m_rows;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() : m_rows(0) {} EIGEN_DEVICE_FUNC constexpr DenseStorage() : m_rows(0) {}
EIGEN_DEVICE_FUNC explicit DenseStorage(internal::constructor_without_unaligned_array_assert) EIGEN_DEVICE_FUNC explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert)
: m_data(internal::constructor_without_unaligned_array_assert()), m_rows(0) {} : m_data(internal::constructor_without_unaligned_array_assert()), m_rows(0) {}
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other) EIGEN_DEVICE_FUNC constexpr DenseStorage(const DenseStorage& other)
: m_data(internal::constructor_without_unaligned_array_assert()), m_rows(other.m_rows) : m_data(internal::constructor_without_unaligned_array_assert()), m_rows(other.m_rows) {
{
internal::plain_array_helper::copy(other.m_data, m_rows * Cols_, m_data); internal::plain_array_helper::copy(other.m_data, m_rows * Cols_, m_data);
} }
EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage& other) EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage& other)
{ {
if (this != &other) if (this != &other)
@ -431,18 +410,18 @@ class DenseStorage<T, Size, Dynamic, Cols_, Options_>
} }
return *this; return *this;
} }
EIGEN_DEVICE_FUNC DenseStorage(Index, Index rows, Index) : m_rows(rows) {} EIGEN_DEVICE_FUNC constexpr DenseStorage(Index, Index rows, Index) : m_rows(rows) {}
EIGEN_DEVICE_FUNC void swap(DenseStorage& other) EIGEN_DEVICE_FUNC void swap(DenseStorage& other)
{ {
internal::plain_array_helper::swap(m_data, m_rows * Cols_, other.m_data, other.m_rows * Cols_); internal::plain_array_helper::swap(m_data, m_rows * Cols_, other.m_data, other.m_rows * Cols_);
numext::swap(m_rows, other.m_rows); numext::swap(m_rows, other.m_rows);
} }
EIGEN_DEVICE_FUNC Index rows(void) const EIGEN_NOEXCEPT {return m_rows;} EIGEN_DEVICE_FUNC constexpr Index rows(void) const EIGEN_NOEXCEPT { return m_rows; }
EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR Index cols(void) const EIGEN_NOEXCEPT {return Cols_;} EIGEN_DEVICE_FUNC constexpr Index cols(void) const EIGEN_NOEXCEPT { return Cols_; }
EIGEN_DEVICE_FUNC void conservativeResize(Index, Index rows, Index) { m_rows = rows; } EIGEN_DEVICE_FUNC constexpr void conservativeResize(Index, Index rows, Index) { m_rows = rows; }
EIGEN_DEVICE_FUNC void resize(Index, Index rows, Index) { m_rows = rows; } EIGEN_DEVICE_FUNC constexpr void resize(Index, Index rows, Index) { m_rows = rows; }
EIGEN_DEVICE_FUNC const T *data() const { return m_data.array; } EIGEN_DEVICE_FUNC constexpr const T* data() const { return m_data.array; }
EIGEN_DEVICE_FUNC T *data() { return m_data.array; } EIGEN_DEVICE_FUNC constexpr T* data() { return m_data.array; }
}; };
// dynamic-size matrix with fixed-size storage and fixed height // dynamic-size matrix with fixed-size storage and fixed height
@ -452,14 +431,13 @@ class DenseStorage<T, Size, Rows_, Dynamic, Options_>
internal::plain_array<T,Size,Options_> m_data; internal::plain_array<T,Size,Options_> m_data;
Index m_cols; Index m_cols;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() : m_cols(0) {} EIGEN_DEVICE_FUNC constexpr DenseStorage() : m_cols(0) {}
EIGEN_DEVICE_FUNC explicit DenseStorage(internal::constructor_without_unaligned_array_assert) EIGEN_DEVICE_FUNC explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert)
: m_data(internal::constructor_without_unaligned_array_assert()), m_cols(0) {} : m_data(internal::constructor_without_unaligned_array_assert()), m_cols(0) {}
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other) EIGEN_DEVICE_FUNC constexpr DenseStorage(const DenseStorage& other)
: m_data(internal::constructor_without_unaligned_array_assert()), m_cols(other.m_cols) : m_data(internal::constructor_without_unaligned_array_assert()), m_cols(other.m_cols) {
{
internal::plain_array_helper::copy(other.m_data, Rows_ * m_cols, m_data); internal::plain_array_helper::copy(other.m_data, Rows_ * m_cols, m_data);
} }
EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage& other) EIGEN_DEVICE_FUNC DenseStorage& operator=(const DenseStorage& other)
{ {
if (this != &other) if (this != &other)
@ -474,12 +452,12 @@ class DenseStorage<T, Size, Rows_, Dynamic, Options_>
internal::plain_array_helper::swap(m_data, Rows_ * m_cols, other.m_data, Rows_ * other.m_cols); internal::plain_array_helper::swap(m_data, Rows_ * m_cols, other.m_data, Rows_ * other.m_cols);
numext::swap(m_cols, other.m_cols); numext::swap(m_cols, other.m_cols);
} }
EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR Index rows(void) const EIGEN_NOEXCEPT {return Rows_;} EIGEN_DEVICE_FUNC constexpr Index rows(void) const EIGEN_NOEXCEPT { return Rows_; }
EIGEN_DEVICE_FUNC Index cols(void) const EIGEN_NOEXCEPT {return m_cols;} EIGEN_DEVICE_FUNC constexpr Index cols(void) const EIGEN_NOEXCEPT { return m_cols; }
EIGEN_DEVICE_FUNC void conservativeResize(Index, Index, Index cols) { m_cols = cols; } EIGEN_DEVICE_FUNC constexpr void conservativeResize(Index, Index, Index cols) { m_cols = cols; }
EIGEN_DEVICE_FUNC void resize(Index, Index, Index cols) { m_cols = cols; } EIGEN_DEVICE_FUNC constexpr void resize(Index, Index, Index cols) { m_cols = cols; }
EIGEN_DEVICE_FUNC const T *data() const { return m_data.array; } EIGEN_DEVICE_FUNC constexpr const T* data() const { return m_data.array; }
EIGEN_DEVICE_FUNC T *data() { return m_data.array; } EIGEN_DEVICE_FUNC constexpr T* data() { return m_data.array; }
}; };
// purely dynamic matrix. // purely dynamic matrix.
@ -490,15 +468,16 @@ class DenseStorage<T, Dynamic, Dynamic, Dynamic, Options_>
Index m_rows; Index m_rows;
Index m_cols; Index m_cols;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() : m_data(0), m_rows(0), m_cols(0) {} EIGEN_DEVICE_FUNC constexpr DenseStorage() : m_data(0), m_rows(0), m_cols(0) {}
EIGEN_DEVICE_FUNC explicit DenseStorage(internal::constructor_without_unaligned_array_assert) EIGEN_DEVICE_FUNC explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert)
: m_data(0), m_rows(0), m_cols(0) {} : m_data(0), m_rows(0), m_cols(0) {}
EIGEN_DEVICE_FUNC DenseStorage(Index size, Index rows, Index cols) EIGEN_DEVICE_FUNC DenseStorage(Index size, Index rows, Index cols)
: m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(size)), m_rows(rows), m_cols(cols) : m_data(internal::conditional_aligned_new_auto<T, (Options_ & DontAlign) == 0>(size)),
{ m_rows(rows),
m_cols(cols) {
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({}) EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({})
eigen_internal_assert(size==rows*cols && rows>=0 && cols >=0); eigen_internal_assert(size==rows*cols && rows>=0 && cols >=0);
} }
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other) EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other)
: m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(other.m_rows*other.m_cols)) : m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(other.m_rows*other.m_cols))
, m_rows(other.m_rows) , m_rows(other.m_rows)
@ -573,14 +552,14 @@ class DenseStorage<T, Dynamic, Rows_, Dynamic, Options_> {
T *m_data; T *m_data;
Index m_cols; Index m_cols;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() : m_data(0), m_cols(0) {} EIGEN_DEVICE_FUNC constexpr DenseStorage() : m_data(0), m_cols(0) {}
explicit DenseStorage(internal::constructor_without_unaligned_array_assert) : m_data(0), m_cols(0) {} explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert) : m_data(0), m_cols(0) {}
EIGEN_DEVICE_FUNC DenseStorage(Index size, Index rows, Index cols) : m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(size)), m_cols(cols) EIGEN_DEVICE_FUNC DenseStorage(Index size, Index rows, Index cols)
{ : m_data(internal::conditional_aligned_new_auto<T, (Options_ & DontAlign) == 0>(size)), m_cols(cols) {
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({}) EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({})
eigen_internal_assert(size==rows*cols && rows==Rows_ && cols >=0); eigen_internal_assert(size==rows*cols && rows==Rows_ && cols >=0);
EIGEN_UNUSED_VARIABLE(rows); EIGEN_UNUSED_VARIABLE(rows);
} }
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other) EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other)
: m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(Rows_*other.m_cols)) : m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(Rows_*other.m_cols))
, m_cols(other.m_cols) , m_cols(other.m_cols)
@ -617,7 +596,7 @@ class DenseStorage<T, Dynamic, Rows_, Dynamic, Options_> {
numext::swap(m_data,other.m_data); numext::swap(m_data,other.m_data);
numext::swap(m_cols,other.m_cols); numext::swap(m_cols,other.m_cols);
} }
EIGEN_DEVICE_FUNC static EIGEN_CONSTEXPR Index rows(void) EIGEN_NOEXCEPT {return Rows_;} EIGEN_DEVICE_FUNC static constexpr Index rows(void) EIGEN_NOEXCEPT { return Rows_; }
EIGEN_DEVICE_FUNC Index cols(void) const EIGEN_NOEXCEPT {return m_cols;} EIGEN_DEVICE_FUNC Index cols(void) const EIGEN_NOEXCEPT {return m_cols;}
EIGEN_DEVICE_FUNC void conservativeResize(Index size, Index, Index cols) EIGEN_DEVICE_FUNC void conservativeResize(Index size, Index, Index cols)
{ {
@ -648,14 +627,14 @@ class DenseStorage<T, Dynamic, Dynamic, Cols_, Options_>
T *m_data; T *m_data;
Index m_rows; Index m_rows;
public: public:
EIGEN_DEVICE_FUNC DenseStorage() : m_data(0), m_rows(0) {} EIGEN_DEVICE_FUNC constexpr DenseStorage() : m_data(0), m_rows(0) {}
explicit DenseStorage(internal::constructor_without_unaligned_array_assert) : m_data(0), m_rows(0) {} explicit constexpr DenseStorage(internal::constructor_without_unaligned_array_assert) : m_data(0), m_rows(0) {}
EIGEN_DEVICE_FUNC DenseStorage(Index size, Index rows, Index cols) : m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(size)), m_rows(rows) EIGEN_DEVICE_FUNC constexpr DenseStorage(Index size, Index rows, Index cols)
{ : m_data(internal::conditional_aligned_new_auto<T, (Options_ & DontAlign) == 0>(size)), m_rows(rows) {
EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({}) EIGEN_INTERNAL_DENSE_STORAGE_CTOR_PLUGIN({})
eigen_internal_assert(size==rows*cols && rows>=0 && cols == Cols_); eigen_internal_assert(size==rows*cols && rows>=0 && cols == Cols_);
EIGEN_UNUSED_VARIABLE(cols); EIGEN_UNUSED_VARIABLE(cols);
} }
EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other) EIGEN_DEVICE_FUNC DenseStorage(const DenseStorage& other)
: m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(other.m_rows*Cols_)) : m_data(internal::conditional_aligned_new_auto<T,(Options_&DontAlign)==0>(other.m_rows*Cols_))
, m_rows(other.m_rows) , m_rows(other.m_rows)
@ -693,7 +672,7 @@ class DenseStorage<T, Dynamic, Dynamic, Cols_, Options_>
numext::swap(m_rows,other.m_rows); numext::swap(m_rows,other.m_rows);
} }
EIGEN_DEVICE_FUNC Index rows(void) const EIGEN_NOEXCEPT {return m_rows;} EIGEN_DEVICE_FUNC Index rows(void) const EIGEN_NOEXCEPT {return m_rows;}
EIGEN_DEVICE_FUNC static EIGEN_CONSTEXPR Index cols(void) {return Cols_;} EIGEN_DEVICE_FUNC static constexpr Index cols(void) { return Cols_; }
void conservativeResize(Index size, Index rows, Index) void conservativeResize(Index size, Index rows, Index)
{ {
m_data = internal::conditional_aligned_realloc_new_auto<T,(Options_&DontAlign)==0>(m_data, size, m_rows*Cols_); m_data = internal::conditional_aligned_realloc_new_auto<T,(Options_&DontAlign)==0>(m_data, size, m_rows*Cols_);

5
Eigen/src/Core/Matrix.h
View File

@ -312,8 +312,9 @@ class Matrix
* *
* \sa Matrix(const Scalar& a0, const Scalar& a1, const Scalar& a2, const Scalar& a3, const ArgTypes&... args) * \sa Matrix(const Scalar& a0, const Scalar& a1, const Scalar& a2, const Scalar& a3, const ArgTypes&... args)
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC explicit constexpr EIGEN_STRONG_INLINE Matrix(
explicit EIGEN_STRONG_INLINE Matrix(const std::initializer_list<std::initializer_list<Scalar>>& list) : Base(list) {} const std::initializer_list<std::initializer_list<Scalar>>& list)
: Base(list) {}
#ifndef EIGEN_PARSED_BY_DOXYGEN #ifndef EIGEN_PARSED_BY_DOXYGEN

83
Eigen/src/Core/PlainObjectBase.h
View File

@ -29,18 +29,13 @@ namespace Eigen {
namespace internal { namespace internal {
template<int MaxSizeAtCompileTime> struct check_rows_cols_for_overflow { template<int MaxSizeAtCompileTime> struct check_rows_cols_for_overflow {
template<typename Index> template <typename Index>
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC static EIGEN_ALWAYS_INLINE constexpr void run(Index, Index) {}
static EIGEN_ALWAYS_INLINE void run(Index, Index)
{
}
}; };
template<> struct check_rows_cols_for_overflow<Dynamic> { template<> struct check_rows_cols_for_overflow<Dynamic> {
template<typename Index> template <typename Index>
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC static EIGEN_ALWAYS_INLINE constexpr void run(Index rows, Index cols) {
static EIGEN_ALWAYS_INLINE void run(Index rows, Index cols)
{
// http://hg.mozilla.org/mozilla-central/file/6c8a909977d3/xpcom/ds/CheckedInt.h#l242 // http://hg.mozilla.org/mozilla-central/file/6c8a909977d3/xpcom/ds/CheckedInt.h#l242
// we assume Index is signed // we assume Index is signed
Index max_index = (std::size_t(1) << (8 * sizeof(Index) - 1)) - 1; // assume Index is signed Index max_index = (std::size_t(1) << (8 * sizeof(Index) - 1)) - 1; // assume Index is signed
@ -160,12 +155,10 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts. * provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
* *
* See DenseCoeffsBase<Derived,ReadOnlyAccessors>::coeff(Index) const for details. */ * See DenseCoeffsBase<Derived,ReadOnlyAccessors>::coeff(Index) const for details. */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr const Scalar& coeff(Index rowId, Index colId) const {
EIGEN_STRONG_INLINE const Scalar& coeff(Index rowId, Index colId) const if (Flags & RowMajorBit)
{
if(Flags & RowMajorBit)
return m_storage.data()[colId + rowId * m_storage.cols()]; return m_storage.data()[colId + rowId * m_storage.cols()];
else // column-major else // column-major
return m_storage.data()[rowId + colId * m_storage.rows()]; return m_storage.data()[rowId + colId * m_storage.rows()];
} }
@ -183,12 +176,10 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts. * provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
* *
* See DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index,Index) const for details. */ * See DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index,Index) const for details. */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr Scalar& coeffRef(Index rowId, Index colId) {
EIGEN_STRONG_INLINE Scalar& coeffRef(Index rowId, Index colId) if (Flags & RowMajorBit)
{
if(Flags & RowMajorBit)
return m_storage.data()[colId + rowId * m_storage.cols()]; return m_storage.data()[colId + rowId * m_storage.cols()];
else // column-major else // column-major
return m_storage.data()[rowId + colId * m_storage.rows()]; return m_storage.data()[rowId + colId * m_storage.rows()];
} }
@ -196,28 +187,20 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts. * provided to by-pass the creation of an evaluator of the expression, thus saving compilation efforts.
* *
* See DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index) const for details. */ * See DenseCoeffsBase<Derived,WriteAccessors>::coeffRef(Index) const for details. */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr Scalar& coeffRef(Index index) { return m_storage.data()[index]; }
EIGEN_STRONG_INLINE Scalar& coeffRef(Index index)
{
return m_storage.data()[index];
}
/** This is the const version of coeffRef(Index,Index) which is thus synonym of coeff(Index,Index). /** This is the const version of coeffRef(Index,Index) which is thus synonym of coeff(Index,Index).
* It is provided for convenience. */ * It is provided for convenience. */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr const Scalar& coeffRef(Index rowId, Index colId) const {
EIGEN_STRONG_INLINE const Scalar& coeffRef(Index rowId, Index colId) const if (Flags & RowMajorBit)
{
if(Flags & RowMajorBit)
return m_storage.data()[colId + rowId * m_storage.cols()]; return m_storage.data()[colId + rowId * m_storage.cols()];
else // column-major else // column-major
return m_storage.data()[rowId + colId * m_storage.rows()]; return m_storage.data()[rowId + colId * m_storage.rows()];
} }
/** This is the const version of coeffRef(Index) which is thus synonym of coeff(Index). /** This is the const version of coeffRef(Index) which is thus synonym of coeff(Index).
* It is provided for convenience. */ * It is provided for convenience. */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr const Scalar& coeffRef(Index index) const {
EIGEN_STRONG_INLINE const Scalar& coeffRef(Index index) const
{
return m_storage.data()[index]; return m_storage.data()[index];
} }
@ -279,9 +262,7 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* *
* \sa resize(Index) for vectors, resize(NoChange_t, Index), resize(Index, NoChange_t) * \sa resize(Index) for vectors, resize(NoChange_t, Index), resize(Index, NoChange_t)
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE constexpr void resize(Index rows, Index cols) {
EIGEN_STRONG_INLINE void resize(Index rows, Index cols)
{
eigen_assert(internal::check_implication(RowsAtCompileTime!=Dynamic, rows==RowsAtCompileTime) eigen_assert(internal::check_implication(RowsAtCompileTime!=Dynamic, rows==RowsAtCompileTime)
&& internal::check_implication(ColsAtCompileTime!=Dynamic, cols==ColsAtCompileTime) && internal::check_implication(ColsAtCompileTime!=Dynamic, cols==ColsAtCompileTime)
&& internal::check_implication(RowsAtCompileTime==Dynamic && MaxRowsAtCompileTime!=Dynamic, rows<=MaxRowsAtCompileTime) && internal::check_implication(RowsAtCompileTime==Dynamic && MaxRowsAtCompileTime!=Dynamic, rows<=MaxRowsAtCompileTime)
@ -309,12 +290,13 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* *
* \sa resize(Index,Index), resize(NoChange_t, Index), resize(Index, NoChange_t) * \sa resize(Index,Index), resize(NoChange_t, Index), resize(Index, NoChange_t)
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC inline constexpr void resize(Index size) {
inline void resize(Index size) EIGEN_STATIC_ASSERT_VECTOR_ONLY(PlainObjectBase)
{ eigen_assert(
EIGEN_STATIC_ASSERT_VECTOR_ONLY(PlainObjectBase) ((SizeAtCompileTime == Dynamic && (MaxSizeAtCompileTime == Dynamic || size <= MaxSizeAtCompileTime)) ||
eigen_assert(((SizeAtCompileTime == Dynamic && (MaxSizeAtCompileTime==Dynamic || size<=MaxSizeAtCompileTime)) || SizeAtCompileTime == size) && size>=0); SizeAtCompileTime == size) &&
#ifdef EIGEN_INITIALIZE_COEFFS size >= 0);
#ifdef EIGEN_INITIALIZE_COEFFS
bool size_changed = size != this->size(); bool size_changed = size != this->size();
#endif #endif
if(RowsAtCompileTime == 1) if(RowsAtCompileTime == 1)
@ -334,11 +316,7 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* *
* \sa resize(Index,Index) * \sa resize(Index,Index)
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC inline constexpr void resize(NoChange_t, Index cols) { resize(rows(), cols); }
inline void resize(NoChange_t, Index cols)
{
resize(rows(), cols);
}
/** Resizes the matrix, changing only the number of rows. For the parameter of type NoChange_t, just pass the special value \c NoChange /** Resizes the matrix, changing only the number of rows. For the parameter of type NoChange_t, just pass the special value \c NoChange
* as in the example below. * as in the example below.
@ -348,11 +326,7 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
* *
* \sa resize(Index,Index) * \sa resize(Index,Index)
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC inline constexpr void resize(Index rows, NoChange_t) { resize(rows, cols()); }
inline void resize(Index rows, NoChange_t)
{
resize(rows, cols());
}
/** Resizes \c *this to have the same dimensions as \a other. /** Resizes \c *this to have the same dimensions as \a other.
* Takes care of doing all the checking that's needed. * Takes care of doing all the checking that's needed.
@ -552,10 +526,9 @@ class PlainObjectBase : public internal::dense_xpr_base<Derived>::type
/** \brief Constructs a Matrix or Array and initializes it by elements given by an initializer list of initializer /** \brief Constructs a Matrix or Array and initializes it by elements given by an initializer list of initializer
* lists * lists
*/ */
EIGEN_DEVICE_FUNC EIGEN_DEVICE_FUNC explicit constexpr EIGEN_STRONG_INLINE PlainObjectBase(
explicit EIGEN_STRONG_INLINE PlainObjectBase(const std::initializer_list<std::initializer_list<Scalar>>& list) const std::initializer_list<std::initializer_list<Scalar>>& list)
: m_storage() : m_storage() {
{
size_t list_size = 0; size_t list_size = 0;
if (list.begin() != list.end()) { if (list.begin() != list.end()) {
list_size = list.begin()->size(); list_size = list.begin()->size();

12
test/CMakeLists.txt
View File

@ -185,6 +185,18 @@ ei_add_test(io)
ei_add_test(packetmath "-DEIGEN_FAST_MATH=1") ei_add_test(packetmath "-DEIGEN_FAST_MATH=1")
ei_add_test(vectorization_logic) ei_add_test(vectorization_logic)
ei_add_test(basicstuff) ei_add_test(basicstuff)
ei_add_test_internal(constexpr constexpr_cxx14)
target_compile_features(constexpr_cxx14 PRIVATE cxx_std_14)
if ("cxx_std_17" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
# C++17 changes some rules related to constexpr, check that it works
ei_add_test_internal(constexpr constexpr_cxx17)
target_compile_features(constexpr_cxx17 PRIVATE cxx_std_17)
endif()
if ("cxx_std_20" IN_LIST CMAKE_CXX_COMPILE_FEATURES)
# C++20 changes some rules related to constexpr, check that it works
ei_add_test_internal(constexpr constexpr_cxx20)
target_compile_features(constexpr_cxx20 PRIVATE cxx_std_20)
endif()
ei_add_test(constructor) ei_add_test(constructor)
ei_add_test(linearstructure) ei_add_test(linearstructure)
ei_add_test(integer_types) ei_add_test(integer_types)

52
test/constexpr.cpp Normal file
View File

@ -0,0 +1,52 @@
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2022 Alex Richardson <alexrichardson@google.com>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include "main.h"
EIGEN_DECLARE_TEST(constexpr) {
// Clang accepts (some of) this code when using C++14/C++17, but GCC does not like
// the fact that `T array[Size]` inside Eigen::internal::plain_array is not initialized
// until after the constructor returns:
// error: member ‘Eigen::internal::plain_array<int, 9, 0, 0>::array’ must be initialized by mem-initializer in
// ‘constexpr’ constructor
#if EIGEN_COMP_CXXVER >= 20 || defined(__clang__)
constexpr Matrix3i mat({{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
VERIFY_IS_EQUAL(mat.size(), 9);
VERIFY_IS_EQUAL(mat(0, 0), 1);
static_assert(mat.coeff(0,1) == 2);
constexpr Array33i arr({{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
VERIFY_IS_EQUAL(arr(0, 0), 1);
VERIFY_IS_EQUAL(arr.size(), 9);
static_assert(arr.coeff(0,1) == 2);
// Also check dynamic size arrays/matrices with fixed-size storage (currently
// only works if all elements are initialized, since otherwise the compiler
// complains about uninitialized trailing elements.
constexpr Matrix<int, Eigen::Dynamic, Eigen::Dynamic, 0, 3, 3> dyn_mat({{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
VERIFY_IS_EQUAL(dyn_mat.size(), 9);
VERIFY_IS_EQUAL(dyn_mat(0, 0), 1);
static_assert(dyn_mat.coeff(0,1) == 2);
constexpr Array<int, Eigen::Dynamic, Eigen::Dynamic, 0, 3, 3> dyn_arr({{1, 2, 3}, {4, 5, 6}, {7, 8, 9}});
VERIFY_IS_EQUAL(dyn_arr(0, 0), 1);
VERIFY_IS_EQUAL(dyn_arr.size(), 9);
static_assert(dyn_arr.coeff(0,1) == 2);
#endif // EIGEN_COMP_CXXVER >= 20 || defined(__clang__)
}
// Check that we can use the std::initializer_list constructor for constexpr variables.
#if EIGEN_COMP_CXXVER >= 20
// EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT() will fail constexpr evaluation unless
// we have std::is_constant_evaluated().
constexpr Matrix<int, 2, 2> global_mat({{1, 2}, {3, 4}});
EIGEN_DECLARE_TEST(constexpr_global) {
VERIFY_IS_EQUAL(global_mat.size(), 4);
VERIFY_IS_EQUAL(global_mat(0, 0), 1);
static_assert(global_mat.coeff(0,0) == 1);
}
#endif // EIGEN_COMP_CXXVER >= 20