10 #ifndef EIGEN_CXX11META_H 11 #define EIGEN_CXX11META_H 23 template<
typename... tt>
24 struct type_list { constexpr
static int count =
sizeof...(tt); };
26 template<
typename t,
typename... tt>
27 struct type_list<t, tt...> { constexpr
static int count =
sizeof...(tt) + 1;
typedef t first_type; };
29 template<
typename T, T... nn>
30 struct numeric_list { constexpr
static std::size_t count =
sizeof...(nn); };
32 template<
typename T, T n, T... nn>
33 struct numeric_list<T, n, nn...> { constexpr
static std::size_t count =
sizeof...(nn) + 1; constexpr
static T first_value = n; };
45 template<
typename T, std::size_t n, T start = 0, T... ii>
struct gen_numeric_list : gen_numeric_list<T, n-1, start, start + n-1, ii...> {};
46 template<
typename T, T start, T... ii>
struct gen_numeric_list<T, 0, start, ii...> {
typedef numeric_list<T, ii...> type; };
48 template<
typename T, std::size_t n, T start = 0, T... ii>
struct gen_numeric_list_reversed : gen_numeric_list_reversed<T, n-1, start, ii..., start + n-1> {};
49 template<
typename T, T start, T... ii>
struct gen_numeric_list_reversed<T, 0, start, ii...> {
typedef numeric_list<T, ii...> type; };
51 template<
typename T, std::size_t n, T a, T b, T start = 0, T... ii>
struct gen_numeric_list_swapped_pair : gen_numeric_list_swapped_pair<T, n-1, a, b, start, (start + n-1) == a ? b : ((start + n-1) == b ? a : (start + n-1)), ii...> {};
52 template<
typename T, T a, T b, T start, T... ii>
struct gen_numeric_list_swapped_pair<T, 0, a, b, start, ii...> {
typedef numeric_list<T, ii...> type; };
54 template<
typename T, std::size_t n, T V, T... nn>
struct gen_numeric_list_repeated : gen_numeric_list_repeated<T, n-1, V, V, nn...> {};
55 template<
typename T, T V, T... nn>
struct gen_numeric_list_repeated<T, 0, V, nn...> {
typedef numeric_list<T, nn...> type; };
59 template<
class a,
class b>
struct concat;
61 template<
typename... as,
typename... bs>
struct concat<type_list<as...>, type_list<bs...>> {
typedef type_list<as..., bs...> type; };
62 template<
typename T, T... as, T... bs>
struct concat<numeric_list<T, as...>, numeric_list<T, bs...> > {
typedef numeric_list<T, as..., bs...> type; };
64 template<
typename... p>
struct mconcat;
65 template<
typename a>
struct mconcat<a> {
typedef a type; };
66 template<
typename a,
typename b>
struct mconcat<a, b> : concat<a, b> {};
67 template<
typename a,
typename b,
typename... cs>
struct mconcat<a, b, cs...> : concat<a, typename mconcat<b, cs...>::type> {};
71 template<
int n,
typename x>
struct take;
72 template<
int n,
typename a,
typename... as>
struct take<n, type_list<a, as...>> : concat<type_list<a>, typename take<n-1, type_list<as...>>::type> {};
73 template<
int n>
struct take<n, type_list<>> {
typedef type_list<> type; };
74 template<
typename a,
typename... as>
struct take<0, type_list<a, as...>> {
typedef type_list<> type; };
75 template<>
struct take<0, type_list<>> {
typedef type_list<> type; };
77 template<
typename T,
int n, T a, T... as>
struct take<n, numeric_list<T, a, as...>> : concat<numeric_list<T, a>, typename take<n-1, numeric_list<T, as...>>::type> {};
78 template<
typename T,
int n>
struct take<n, numeric_list<T>> {
typedef numeric_list<T> type; };
79 template<
typename T, T a, T... as>
struct take<0, numeric_list<T, a, as...>> {
typedef numeric_list<T> type; };
80 template<
typename T>
struct take<0, numeric_list<T>> {
typedef numeric_list<T> type; };
82 template<
typename T,
int n, T... ii>
struct h_skip_helper_numeric;
83 template<
typename T,
int n, T i, T... ii>
struct h_skip_helper_numeric<T, n, i, ii...> : h_skip_helper_numeric<T, n-1, ii...> {};
84 template<
typename T, T i, T... ii>
struct h_skip_helper_numeric<T, 0, i, ii...> {
typedef numeric_list<T, i, ii...> type; };
85 template<
typename T,
int n>
struct h_skip_helper_numeric<T, n> {
typedef numeric_list<T> type; };
86 template<
typename T>
struct h_skip_helper_numeric<T, 0> {
typedef numeric_list<T> type; };
88 template<
int n,
typename... tt>
struct h_skip_helper_type;
89 template<
int n,
typename t,
typename... tt>
struct h_skip_helper_type<n, t, tt...> : h_skip_helper_type<n-1, tt...> {};
90 template<
typename t,
typename... tt>
struct h_skip_helper_type<0, t, tt...> {
typedef type_list<t, tt...> type; };
91 template<
int n>
struct h_skip_helper_type<n> {
typedef type_list<> type; };
92 template<>
struct h_skip_helper_type<0> {
typedef type_list<> type; };
96 template<
typename T, T... ii>
97 constexpr
static inline typename h_skip_helper_numeric<T, n, ii...>::type helper(numeric_list<T, ii...>) {
return typename h_skip_helper_numeric<T, n, ii...>::type(); }
98 template<
typename... tt>
99 constexpr
static inline typename h_skip_helper_type<n, tt...>::type helper(type_list<tt...>) {
return typename h_skip_helper_type<n, tt...>::type(); }
102 template<
int n,
typename a>
struct skip {
typedef decltype(h_skip<n>::helper(a())) type; };
104 template<
int start,
int count,
typename a>
struct slice : take<count, typename skip<start, a>::type> {};
108 template<
int n,
typename x>
struct get;
110 template<
int n,
typename a,
typename... as>
struct get<n, type_list<a, as...>> : get<n-1, type_list<as...>> {};
111 template<
typename a,
typename... as>
struct get<0, type_list<a, as...>> {
typedef a type; };
112 template<
int n EIGEN_TPL_PP_SPEC_HACK_DEFC(
typename, as)>
struct get<n, type_list<EIGEN_TPL_PP_SPEC_HACK_USE(as)>> { static_assert((n - n) < 0,
"meta-template get: The element to extract from a list must be smaller than the size of the list."); };
114 template<
typename T,
int n, T a, T... as>
struct get<n, numeric_list<T, a, as...>> : get<n-1, numeric_list<T, as...>> {};
115 template<
typename T, T a, T... as>
struct get<0, numeric_list<T, a, as...>> { constexpr
static T value = a; };
116 template<
typename T,
int n EIGEN_TPL_PP_SPEC_HACK_DEFC(T, as)>
struct get<n, numeric_list<T EIGEN_TPL_PP_SPEC_HACK_USEC(as)>> { static_assert((n - n) < 0,
"meta-template get: The element to extract from a list must be smaller than the size of the list."); };
120 template<
typename T, T dummy,
typename t>
struct id_numeric {
typedef t type; };
121 template<
typename dummy,
typename t>
struct id_type {
typedef t type; };
125 template<
typename a,
typename b>
struct is_same_gf : is_same<a, b> { constexpr
static int global_flags = 0; };
131 template<
typename,
typename>
class op,
132 typename additional_param,
135 struct h_apply_op_helper {
typedef type_list<typename op<values, additional_param>::type...> type; };
137 template<
typename,
typename>
class op,
138 typename additional_param,
141 struct h_apply_op_helper<true, op, additional_param, values...> {
typedef type_list<typename op<additional_param, values>::type...> type; };
145 template<
typename,
typename>
class op,
146 typename additional_param
150 template<
typename... values>
151 constexpr
static typename h_apply_op_helper<from_left, op, additional_param, values...>::type helper(type_list<values...>)
152 {
return typename h_apply_op_helper<from_left, op, additional_param, values...>::type(); }
156 template<
typename,
typename>
class op,
157 typename additional_param,
160 struct apply_op_from_left {
typedef decltype(h_apply_op<true, op, additional_param>::helper(a())) type; };
163 template<
typename,
typename>
class op,
164 typename additional_param,
167 struct apply_op_from_right {
typedef decltype(h_apply_op<false, op, additional_param>::helper(a())) type; };
172 template<
typename,
typename>
class test,
173 typename check_against,
175 bool last_check_positive =
false 177 struct contained_in_list;
180 template<
typename,
typename>
class test,
181 typename check_against,
184 struct contained_in_list<test, check_against, h_list, true>
186 constexpr
static bool value =
true;
190 template<
typename,
typename>
class test,
191 typename check_against,
195 struct contained_in_list<test, check_against, type_list<a, as...>, false> : contained_in_list<test, check_against, type_list<as...>, test<check_against, a>::value> {};
198 template<
typename,
typename>
class test,
199 typename check_against
200 EIGEN_TPL_PP_SPEC_HACK_DEFC(
typename, empty)
202 struct contained_in_list<test, check_against, type_list<EIGEN_TPL_PP_SPEC_HACK_USE(empty)>, false> { constexpr
static bool value =
false; };
207 template<
typename,
typename>
class test,
208 typename check_against,
210 int default_flags = 0,
211 bool last_check_positive =
false,
212 int last_check_flags = default_flags
214 struct contained_in_list_gf;
217 template<
typename,
typename>
class test,
218 typename check_against,
223 struct contained_in_list_gf<test, check_against, h_list, default_flags, true, last_check_flags>
225 constexpr
static bool value =
true;
226 constexpr
static int global_flags = last_check_flags;
230 template<
typename,
typename>
class test,
231 typename check_against,
237 struct contained_in_list_gf<test, check_against, type_list<a, as...>, default_flags, false, last_check_flags> : contained_in_list_gf<test, check_against, type_list<as...>, default_flags, test<check_against, a>::value, test<check_against, a>::global_flags> {};
240 template<
typename,
typename>
class test,
241 typename check_against
242 EIGEN_TPL_PP_SPEC_HACK_DEFC(
typename, empty),
246 struct contained_in_list_gf<test, check_against, type_list<EIGEN_TPL_PP_SPEC_HACK_USE(empty)>, default_flags, false, last_check_flags> { constexpr
static bool value =
false; constexpr
static int global_flags = default_flags; };
257 >
struct reduce<Reducer>
259 constexpr
static inline int run() {
return Reducer::Identity; }
266 >
struct reduce<Reducer, A, Ts...>
268 constexpr
static inline A run(A a, Ts...) {
return a; }
276 >
struct reduce<Reducer, A, B, Ts...>
278 constexpr
static inline auto run(A a, B b, Ts... ts) -> decltype(Reducer::run(a, reduce<Reducer, B, Ts...>::run(b, ts...))) {
279 return Reducer::run(a, reduce<Reducer, B, Ts...>::run(b, ts...));
286 template<
typename A,
typename B> EIGEN_DEVICE_FUNC constexpr
static inline auto run(A a, B b) -> decltype(a + b) {
return a + b; }
287 static constexpr
int Identity = 0;
290 template<
typename A,
typename B> EIGEN_DEVICE_FUNC constexpr
static inline auto run(A a, B b) -> decltype(a * b) {
return a * b; }
291 static constexpr
int Identity = 1;
294 struct logical_and_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a && b) {
return a && b; } };
295 struct logical_or_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a || b) {
return a || b; } };
297 struct equal_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a == b) {
return a == b; } };
298 struct not_equal_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a != b) {
return a != b; } };
299 struct lesser_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a < b) {
return a < b; } };
300 struct lesser_equal_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a <= b) {
return a <= b; } };
301 struct greater_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a > b) {
return a > b; } };
302 struct greater_equal_op {
template<
typename A,
typename B> constexpr
static inline auto run(A a, B b) -> decltype(a >= b) {
return a >= b; } };
306 struct not_op {
template<
typename A> constexpr
static inline auto run(A a) -> decltype(!a) {
return !a; } };
307 struct negation_op {
template<
typename A> constexpr
static inline auto run(A a) -> decltype(-a) {
return -a; } };
308 struct greater_equal_zero_op {
template<
typename A> constexpr
static inline auto run(A a) -> decltype(a >= 0) {
return a >= 0; } };
316 template<
typename... Ts>
317 constexpr
inline decltype(reduce<product_op, Ts...>::run((*((Ts*)0))...)) arg_prod(Ts... ts)
319 return reduce<product_op, Ts...>::run(ts...);
322 template<
typename... Ts>
323 constexpr
inline decltype(reduce<sum_op, Ts...>::run((*((Ts*)0))...)) arg_sum(Ts... ts)
325 return reduce<sum_op, Ts...>::run(ts...);
330 template<
typename Array,
int... n>
331 constexpr
inline Array h_array_reverse(Array arr, numeric_list<int, n...>)
333 return {{array_get<
sizeof...(n) - n - 1>(arr)...}};
336 template<
typename T, std::
size_t N>
337 constexpr
inline array<T, N> array_reverse(array<T, N> arr)
339 return h_array_reverse(arr,
typename gen_numeric_list<int, N>::type());
350 template<
typename Reducer,
typename T, std::size_t N, std::size_t n = N - 1>
351 struct h_array_reduce {
352 EIGEN_DEVICE_FUNC constexpr
static inline auto run(array<T, N> arr, T identity) -> decltype(Reducer::run(h_array_reduce<Reducer, T, N, n - 1>::run(arr, identity), array_get<n>(arr)))
354 return Reducer::run(h_array_reduce<Reducer, T, N, n - 1>::run(arr, identity), array_get<n>(arr));
358 template<
typename Reducer,
typename T, std::
size_t N>
359 struct h_array_reduce<Reducer, T, N, 0>
361 EIGEN_DEVICE_FUNC constexpr
static inline T run(
const array<T, N>& arr, T)
363 return array_get<0>(arr);
367 template<
typename Reducer,
typename T>
368 struct h_array_reduce<Reducer, T, 0>
370 EIGEN_DEVICE_FUNC constexpr
static inline T run(
const array<T, 0>&, T identity)
376 template<
typename Reducer,
typename T, std::
size_t N>
377 EIGEN_DEVICE_FUNC constexpr
inline auto array_reduce(
const array<T, N>& arr, T identity) -> decltype(h_array_reduce<Reducer, T, N>::run(arr, identity))
379 return h_array_reduce<Reducer, T, N>::run(arr, identity);
384 template<
typename T, std::
size_t N>
385 EIGEN_DEVICE_FUNC constexpr
inline auto array_sum(
const array<T, N>& arr) -> decltype(array_reduce<sum_op, T, N>(arr, static_cast<T>(0)))
387 return array_reduce<sum_op, T, N>(arr,
static_cast<T
>(0));
390 template<
typename T, std::
size_t N>
391 EIGEN_DEVICE_FUNC constexpr
inline auto array_prod(
const array<T, N>& arr) -> decltype(array_reduce<product_op, T, N>(arr, static_cast<T>(1)))
393 return array_reduce<product_op, T, N>(arr,
static_cast<T
>(1));
397 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE t array_prod(
const std::vector<t>& a) {
398 eigen_assert(a.size() > 0);
400 for (
size_t i = 0; i < a.size(); ++i) { prod *= a[i]; }
406 template<
typename Op,
typename A,
typename B, std::size_t N,
int... n>
407 constexpr
inline array<decltype(Op::run(A(), B())),N> h_array_zip(array<A, N> a, array<B, N> b, numeric_list<int, n...>)
409 return array<decltype(Op::run(A(), B())),N>{{ Op::run(array_get<n>(a), array_get<n>(b))... }};
412 template<
typename Op,
typename A,
typename B, std::
size_t N>
413 constexpr
inline array<decltype(Op::run(A(), B())),N> array_zip(array<A, N> a, array<B, N> b)
415 return h_array_zip<Op>(a, b,
typename gen_numeric_list<int, N>::type());
420 template<
typename Reducer,
typename Op,
typename A,
typename B, std::size_t N,
int... n>
421 constexpr
inline auto h_array_zip_and_reduce(array<A, N> a, array<B, N> b, numeric_list<int, n...>) -> decltype(reduce<Reducer,
typename id_numeric<
int,n,decltype(Op::run(A(), B()))>::type...>::run(Op::run(array_get<n>(a), array_get<n>(b))...))
423 return reduce<Reducer, typename id_numeric<int,n,decltype(Op::run(A(), B()))>::type...>::run(Op::run(array_get<n>(a), array_get<n>(b))...);
426 template<
typename Reducer,
typename Op,
typename A,
typename B, std::
size_t N>
427 constexpr
inline auto array_zip_and_reduce(array<A, N> a, array<B, N> b) -> decltype(h_array_zip_and_reduce<Reducer, Op, A, B, N>(a, b,
typename gen_numeric_list<int, N>::type()))
429 return h_array_zip_and_reduce<Reducer, Op, A, B, N>(a, b,
typename gen_numeric_list<int, N>::type());
434 template<
typename Op,
typename A, std::size_t N,
int... n>
435 constexpr
inline array<decltype(Op::run(A())),N> h_array_apply(array<A, N> a, numeric_list<int, n...>)
437 return array<decltype(Op::run(A())),N>{{ Op::run(array_get<n>(a))... }};
440 template<
typename Op,
typename A, std::
size_t N>
441 constexpr
inline array<decltype(Op::run(A())),N> array_apply(array<A, N> a)
443 return h_array_apply<Op>(a,
typename gen_numeric_list<int, N>::type());
448 template<
typename Reducer,
typename Op,
typename A, std::size_t N,
int... n>
449 constexpr
inline auto h_array_apply_and_reduce(array<A, N> arr, numeric_list<int, n...>) -> decltype(reduce<Reducer,
typename id_numeric<
int,n,decltype(Op::run(A()))>::type...>::run(Op::run(array_get<n>(arr))...))
451 return reduce<Reducer, typename id_numeric<int,n,decltype(Op::run(A()))>::type...>::run(Op::run(array_get<n>(arr))...);
454 template<
typename Reducer,
typename Op,
typename A, std::
size_t N>
455 constexpr
inline auto array_apply_and_reduce(array<A, N> a) -> decltype(h_array_apply_and_reduce<Reducer, Op, A, N>(a,
typename gen_numeric_list<int, N>::type()))
457 return h_array_apply_and_reduce<Reducer, Op, A, N>(a,
typename gen_numeric_list<int, N>::type());
468 template<
typename t,
int... ii>
469 constexpr
static inline array<t, n> run(t v, numeric_list<int, ii...>)
471 return {{
typename id_numeric<int, ii, t>::type(v)... }};
475 template<
int n,
typename t>
476 constexpr array<t, n> repeat(t v) {
return h_repeat<n>::run(v,
typename gen_numeric_list<int, n>::type()); }
479 template<
class InstType,
typename ArrType, std::size_t N,
bool Reverse,
typename... Ps>
480 struct h_instantiate_by_c_array;
482 template<
class InstType,
typename ArrType, std::size_t N,
typename... Ps>
483 struct h_instantiate_by_c_array<InstType, ArrType, N, false, Ps...>
485 static InstType run(ArrType* arr, Ps... args)
487 return h_instantiate_by_c_array<InstType, ArrType, N - 1, false, Ps..., ArrType>::run(arr + 1, args..., arr[0]);
491 template<
class InstType,
typename ArrType, std::size_t N,
typename... Ps>
492 struct h_instantiate_by_c_array<InstType, ArrType, N, true, Ps...>
494 static InstType run(ArrType* arr, Ps... args)
496 return h_instantiate_by_c_array<InstType, ArrType, N - 1, false, ArrType, Ps...>::run(arr + 1, arr[0], args...);
500 template<
class InstType,
typename ArrType,
typename... Ps>
501 struct h_instantiate_by_c_array<InstType, ArrType, 0, false, Ps...>
503 static InstType run(ArrType* arr, Ps... args)
506 return InstType(args...);
510 template<
class InstType,
typename ArrType,
typename... Ps>
511 struct h_instantiate_by_c_array<InstType, ArrType, 0, true, Ps...>
513 static InstType run(ArrType* arr, Ps... args)
516 return InstType(args...);
520 template<
class InstType,
typename ArrType, std::
size_t N,
bool Reverse = false>
521 InstType instantiate_by_c_array(ArrType* arr)
523 return h_instantiate_by_c_array<InstType, ArrType, N, Reverse>::run(arr);
530 #endif // EIGEN_CXX11META_H Namespace containing all symbols from the Eigen library.
Definition: CXX11Meta.h:13