1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2008 Gael Guennebaud <[email protected]>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10 #include "main.h"
11
12 template<typename From, typename To>
check_is_convertible(const From &,const To &)13 bool check_is_convertible(const From&, const To&)
14 {
15 return internal::is_convertible<From,To>::value;
16 }
17
18 struct FooReturnType {
19 typedef int ReturnType;
20 };
21
22 struct MyInterface {
23 virtual void func() = 0;
~MyInterfaceMyInterface24 virtual ~MyInterface() {}
25 };
26 struct MyImpl : public MyInterface {
funcMyImpl27 void func() {}
28 };
29
EIGEN_DECLARE_TEST(meta)30 EIGEN_DECLARE_TEST(meta)
31 {
32 VERIFY((internal::conditional<(3<4),internal::true_type, internal::false_type>::type::value));
33 VERIFY(( internal::is_same<float,float>::value));
34 VERIFY((!internal::is_same<float,double>::value));
35 VERIFY((!internal::is_same<float,float&>::value));
36 VERIFY((!internal::is_same<float,const float&>::value));
37
38 VERIFY(( internal::is_same<float,internal::remove_all<const float&>::type >::value));
39 VERIFY(( internal::is_same<float,internal::remove_all<const float*>::type >::value));
40 VERIFY(( internal::is_same<float,internal::remove_all<const float*&>::type >::value));
41 VERIFY(( internal::is_same<float,internal::remove_all<float**>::type >::value));
42 VERIFY(( internal::is_same<float,internal::remove_all<float**&>::type >::value));
43 VERIFY(( internal::is_same<float,internal::remove_all<float* const *&>::type >::value));
44 VERIFY(( internal::is_same<float,internal::remove_all<float* const>::type >::value));
45
46 // test add_const
47 VERIFY(( internal::is_same< internal::add_const<float>::type, const float >::value));
48 VERIFY(( internal::is_same< internal::add_const<float*>::type, float* const>::value));
49 VERIFY(( internal::is_same< internal::add_const<float const*>::type, float const* const>::value));
50 VERIFY(( internal::is_same< internal::add_const<float&>::type, float& >::value));
51
52 // test remove_const
53 VERIFY(( internal::is_same< internal::remove_const<float const* const>::type, float const* >::value));
54 VERIFY(( internal::is_same< internal::remove_const<float const*>::type, float const* >::value));
55 VERIFY(( internal::is_same< internal::remove_const<float* const>::type, float* >::value));
56
57 // test add_const_on_value_type
58 VERIFY(( internal::is_same< internal::add_const_on_value_type<float&>::type, float const& >::value));
59 VERIFY(( internal::is_same< internal::add_const_on_value_type<float*>::type, float const* >::value));
60
61 VERIFY(( internal::is_same< internal::add_const_on_value_type<float>::type, const float >::value));
62 VERIFY(( internal::is_same< internal::add_const_on_value_type<const float>::type, const float >::value));
63
64 VERIFY(( internal::is_same< internal::add_const_on_value_type<const float* const>::type, const float* const>::value));
65 VERIFY(( internal::is_same< internal::add_const_on_value_type<float* const>::type, const float* const>::value));
66
67 VERIFY(( internal::is_same<float,internal::remove_reference<float&>::type >::value));
68 VERIFY(( internal::is_same<const float,internal::remove_reference<const float&>::type >::value));
69 VERIFY(( internal::is_same<float,internal::remove_pointer<float*>::type >::value));
70 VERIFY(( internal::is_same<const float,internal::remove_pointer<const float*>::type >::value));
71 VERIFY(( internal::is_same<float,internal::remove_pointer<float* const >::type >::value));
72
73
74 // is_convertible
75 STATIC_CHECK(( internal::is_convertible<float,double>::value ));
76 STATIC_CHECK(( internal::is_convertible<int,double>::value ));
77 STATIC_CHECK(( internal::is_convertible<int, short>::value ));
78 STATIC_CHECK(( internal::is_convertible<short, int>::value ));
79 STATIC_CHECK(( internal::is_convertible<double,int>::value ));
80 STATIC_CHECK(( internal::is_convertible<double,std::complex<double> >::value ));
81 STATIC_CHECK((!internal::is_convertible<std::complex<double>,double>::value ));
82 STATIC_CHECK(( internal::is_convertible<Array33f,Matrix3f>::value ));
83 STATIC_CHECK(( internal::is_convertible<Matrix3f&,Matrix3f>::value ));
84 STATIC_CHECK(( internal::is_convertible<Matrix3f&,Matrix3f&>::value ));
85 STATIC_CHECK(( internal::is_convertible<Matrix3f&,const Matrix3f&>::value ));
86 STATIC_CHECK(( internal::is_convertible<const Matrix3f&,Matrix3f>::value ));
87 STATIC_CHECK(( internal::is_convertible<const Matrix3f&,const Matrix3f&>::value ));
88 STATIC_CHECK((!internal::is_convertible<const Matrix3f&,Matrix3f&>::value ));
89 STATIC_CHECK((!internal::is_convertible<const Matrix3f,Matrix3f&>::value ));
90 STATIC_CHECK(!( internal::is_convertible<Matrix3f,Matrix3f&>::value ));
91
92 STATIC_CHECK(!( internal::is_convertible<int,int&>::value ));
93 STATIC_CHECK(( internal::is_convertible<const int,const int& >::value ));
94
95 //STATIC_CHECK((!internal::is_convertible<Matrix3f,Matrix3d>::value )); //does not even compile because the conversion is prevented by a static assertion
96 STATIC_CHECK((!internal::is_convertible<Array33f,int>::value ));
97 STATIC_CHECK((!internal::is_convertible<MatrixXf,float>::value ));
98 {
99 float f = 0.0f;
100 MatrixXf A, B;
101 VectorXf a, b;
102 VERIFY(( check_is_convertible(a.dot(b), f) ));
103 VERIFY(( check_is_convertible(a.transpose()*b, f) ));
104 VERIFY((!check_is_convertible(A*B, f) ));
105 VERIFY(( check_is_convertible(A*B, A) ));
106 }
107
108 #if (EIGEN_COMP_GNUC && EIGEN_COMP_GNUC <= 99) \
109 || (EIGEN_COMP_CLANG && EIGEN_COMP_CLANG <= 909) \
110 || (EIGEN_COMP_MSVC && EIGEN_COMP_MSVC <=1914)
111 // See http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1752,
112 // basically, a fix in the c++ standard breaks our c++98 implementation
113 // of is_convertible for abstract classes.
114 // So the following tests are expected to fail with recent compilers.
115
116 STATIC_CHECK(( !internal::is_convertible<MyInterface, MyImpl>::value ));
117 #if (!EIGEN_COMP_GNUC_STRICT) || (EIGEN_GNUC_AT_LEAST(4,8))
118 // GCC prior to 4.8 fails to compile this test:
119 // error: cannot allocate an object of abstract type 'MyInterface'
120 // In other word, it does not obey SFINAE.
121 // Nevertheless, we don't really care about supporting abstract type as scalar type!
122 STATIC_CHECK(( !internal::is_convertible<MyImpl, MyInterface>::value ));
123 #endif
124 STATIC_CHECK(( internal::is_convertible<MyImpl, const MyInterface&>::value ));
125
126 #endif
127
128 {
129 int i = 0;
130 VERIFY(( check_is_convertible(fix<3>(), i) ));
131 VERIFY((!check_is_convertible(i, fix<DynamicIndex>()) ));
132 }
133
134
135 VERIFY(( internal::has_ReturnType<FooReturnType>::value ));
136 VERIFY(( internal::has_ReturnType<ScalarBinaryOpTraits<int,int> >::value ));
137 VERIFY(( !internal::has_ReturnType<MatrixXf>::value ));
138 VERIFY(( !internal::has_ReturnType<int>::value ));
139
140 VERIFY(internal::meta_sqrt<1>::ret == 1);
141 #define VERIFY_META_SQRT(X) VERIFY(internal::meta_sqrt<X>::ret == int(std::sqrt(double(X))))
142 VERIFY_META_SQRT(2);
143 VERIFY_META_SQRT(3);
144 VERIFY_META_SQRT(4);
145 VERIFY_META_SQRT(5);
146 VERIFY_META_SQRT(6);
147 VERIFY_META_SQRT(8);
148 VERIFY_META_SQRT(9);
149 VERIFY_META_SQRT(15);
150 VERIFY_META_SQRT(16);
151 VERIFY_META_SQRT(17);
152 VERIFY_META_SQRT(255);
153 VERIFY_META_SQRT(256);
154 VERIFY_META_SQRT(257);
155 VERIFY_META_SQRT(1023);
156 VERIFY_META_SQRT(1024);
157 VERIFY_META_SQRT(1025);
158 }
159