1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
/*
* Created by Phil Nash on 15/6/2018.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef TWOBLUECUBES_CATCH_GENERATORS_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_GENERATORS_HPP_INCLUDED
#include "catch_interfaces_generatortracker.h"
#include "catch_common.h"
#include "catch_enforce.h"
#include <memory>
#include <vector>
#include <cassert>
#include <utility>
#include <exception>
namespace Catch {
class GeneratorException : public std::exception {
const char* const m_msg = "";
public:
GeneratorException(const char* msg):
m_msg(msg)
{}
const char* what() const noexcept override final;
};
namespace Generators {
// !TBD move this into its own location?
namespace pf{
template<typename T, typename... Args>
std::unique_ptr<T> make_unique( Args&&... args ) {
return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
}
}
template<typename T>
struct IGenerator : GeneratorUntypedBase {
virtual ~IGenerator() = default;
// Returns the current element of the generator
//
// \Precondition The generator is either freshly constructed,
// or the last call to `next()` returned true
virtual T const& get() const = 0;
using type = T;
};
template<typename T>
class SingleValueGenerator final : public IGenerator<T> {
T m_value;
public:
SingleValueGenerator(T&& value) : m_value(std::move(value)) {}
T const& get() const override {
return m_value;
}
bool next() override {
return false;
}
};
template<typename T>
class FixedValuesGenerator final : public IGenerator<T> {
static_assert(!std::is_same<T, bool>::value,
"FixedValuesGenerator does not support bools because of std::vector<bool>"
"specialization, use SingleValue Generator instead.");
std::vector<T> m_values;
size_t m_idx = 0;
public:
FixedValuesGenerator( std::initializer_list<T> values ) : m_values( values ) {}
T const& get() const override {
return m_values[m_idx];
}
bool next() override {
++m_idx;
return m_idx < m_values.size();
}
};
template <typename T>
class GeneratorWrapper final {
std::unique_ptr<IGenerator<T>> m_generator;
public:
GeneratorWrapper(std::unique_ptr<IGenerator<T>> generator):
m_generator(std::move(generator))
{}
T const& get() const {
return m_generator->get();
}
bool next() {
return m_generator->next();
}
};
template <typename T>
GeneratorWrapper<T> value(T&& value) {
return GeneratorWrapper<T>(pf::make_unique<SingleValueGenerator<T>>(std::forward<T>(value)));
}
template <typename T>
GeneratorWrapper<T> values(std::initializer_list<T> values) {
return GeneratorWrapper<T>(pf::make_unique<FixedValuesGenerator<T>>(values));
}
template<typename T>
class Generators : public IGenerator<T> {
std::vector<GeneratorWrapper<T>> m_generators;
size_t m_current = 0;
void populate(GeneratorWrapper<T>&& generator) {
m_generators.emplace_back(std::move(generator));
}
void populate(T&& val) {
m_generators.emplace_back(value(std::forward<T>(val)));
}
template<typename U>
void populate(U&& val) {
populate(T(std::forward<U>(val)));
}
template<typename U, typename... Gs>
void populate(U&& valueOrGenerator, Gs &&... moreGenerators) {
populate(std::forward<U>(valueOrGenerator));
populate(std::forward<Gs>(moreGenerators)...);
}
public:
template <typename... Gs>
Generators(Gs &&... moreGenerators) {
m_generators.reserve(sizeof...(Gs));
populate(std::forward<Gs>(moreGenerators)...);
}
T const& get() const override {
return m_generators[m_current].get();
}
bool next() override {
if (m_current >= m_generators.size()) {
return false;
}
const bool current_status = m_generators[m_current].next();
if (!current_status) {
++m_current;
}
return m_current < m_generators.size();
}
};
template<typename... Ts>
GeneratorWrapper<std::tuple<Ts...>> table( std::initializer_list<std::tuple<typename std::decay<Ts>::type...>> tuples ) {
return values<std::tuple<Ts...>>( tuples );
}
// Tag type to signal that a generator sequence should convert arguments to a specific type
template <typename T>
struct as {};
template<typename T, typename... Gs>
auto makeGenerators( GeneratorWrapper<T>&& generator, Gs &&... moreGenerators ) -> Generators<T> {
return Generators<T>(std::move(generator), std::forward<Gs>(moreGenerators)...);
}
template<typename T>
auto makeGenerators( GeneratorWrapper<T>&& generator ) -> Generators<T> {
return Generators<T>(std::move(generator));
}
template<typename T, typename... Gs>
auto makeGenerators( T&& val, Gs &&... moreGenerators ) -> Generators<T> {
return makeGenerators( value( std::forward<T>( val ) ), std::forward<Gs>( moreGenerators )... );
}
template<typename T, typename U, typename... Gs>
auto makeGenerators( as<T>, U&& val, Gs &&... moreGenerators ) -> Generators<T> {
return makeGenerators( value( T( std::forward<U>( val ) ) ), std::forward<Gs>( moreGenerators )... );
}
auto acquireGeneratorTracker( SourceLineInfo const& lineInfo ) -> IGeneratorTracker&;
template<typename L>
// Note: The type after -> is weird, because VS2015 cannot parse
// the expression used in the typedef inside, when it is in
// return type. Yeah.
auto generate( SourceLineInfo const& lineInfo, L const& generatorExpression ) -> decltype(std::declval<decltype(generatorExpression())>().get()) {
using UnderlyingType = typename decltype(generatorExpression())::type;
IGeneratorTracker& tracker = acquireGeneratorTracker( lineInfo );
if (!tracker.hasGenerator()) {
tracker.setGenerator(pf::make_unique<Generators<UnderlyingType>>(generatorExpression()));
}
auto const& generator = static_cast<IGenerator<UnderlyingType> const&>( *tracker.getGenerator() );
return generator.get();
}
} // namespace Generators
} // namespace Catch
#define GENERATE( ... ) \
Catch::Generators::generate( CATCH_INTERNAL_LINEINFO, [ ]{ using namespace Catch::Generators; return makeGenerators( __VA_ARGS__ ); } ) //NOLINT(google-build-using-namespace)
#define GENERATE_COPY( ... ) \
Catch::Generators::generate( CATCH_INTERNAL_LINEINFO, [=]{ using namespace Catch::Generators; return makeGenerators( __VA_ARGS__ ); } ) //NOLINT(google-build-using-namespace)
#define GENERATE_REF( ... ) \
Catch::Generators::generate( CATCH_INTERNAL_LINEINFO, [&]{ using namespace Catch::Generators; return makeGenerators( __VA_ARGS__ ); } ) //NOLINT(google-build-using-namespace)
#endif // TWOBLUECUBES_CATCH_GENERATORS_HPP_INCLUDED
|
