Vc  1.3.2-dev
SIMD Vector Classes for C++
has_no_allocated_data.h
1 /* This file is part of the Vc library. {{{
2 Copyright © 2014-2015 Matthias Kretz <kretz@kde.org>
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26 }}}*/
27 
28 #ifndef VC_TRAITS_HAS_NO_ALLOCATED_DATA_H_
29 #define VC_TRAITS_HAS_NO_ALLOCATED_DATA_H_
30 
31 #include <array>
32 
33 namespace Vc_VERSIONED_NAMESPACE
34 {
35 namespace Traits
36 {
37 
55 template<typename T> struct has_no_allocated_data_impl : public std::false_type {};
56 
69 template <typename T>
72  typename std::remove_cv<typename std::remove_reference<T>::type>::type>
73 {
74 };
75 
76 // spezializations:
77 template<typename T, std::size_t N> struct has_no_allocated_data_impl<std::array<T, N>> : public std::true_type {};
78 template<typename T, std::size_t N> struct has_no_allocated_data_impl<T[N]> : public std::true_type {};
79 template<typename T> struct has_no_allocated_data_impl<T[]> : public std::true_type {};
80 
81 // tests:
82 static_assert(has_no_allocated_data<int[256]>::value, "");
83 static_assert(has_no_allocated_data<const int[256]>::value, "");
84 static_assert(has_no_allocated_data<volatile int[256]>::value, "");
85 static_assert(has_no_allocated_data<const volatile int[256]>::value, "");
86 
87 static_assert(has_no_allocated_data<int[]>::value, "");
88 static_assert(has_no_allocated_data<int[2][2]>::value, "");
89 
90 static_assert(has_no_allocated_data<const volatile std::array<int, 256> &>::value, "");
91 static_assert(has_no_allocated_data<const volatile std::array<int, 256>>::value, "");
92 static_assert(has_no_allocated_data<volatile std::array<int, 256> &>::value, "");
93 static_assert(has_no_allocated_data<volatile std::array<int, 256>>::value, "");
94 static_assert(has_no_allocated_data<const std::array<int, 256> &>::value, "");
95 static_assert(has_no_allocated_data<const std::array<int, 256>>::value, "");
96 static_assert(has_no_allocated_data<std::array<int, 256>>::value, "");
97 static_assert(has_no_allocated_data<std::array<int, 256> &&>::value, "");
98 static_assert(!has_no_allocated_data<int*>::value, "");
99 static_assert(!has_no_allocated_data<const int*>::value, "");
100 static_assert(!has_no_allocated_data<const int *const>::value, "");
101 static_assert(!has_no_allocated_data<int *const>::value, "");
102 
103 } // namespace Traits
104 } // namespace Vc
105 
106 #endif // VC_TRAITS_HAS_NO_ALLOCATED_DATA_H_
Definition: vector.h:257
Implements the has_no_allocated_data trait.
Type trait that tells whether a container stores its data inside the object or inside allocated memor...