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Differential D91292 Diff 304732 libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/ctor_result_type.pass.cpp

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libcxx/test/std/numerics/rand/rand.eng/rand.eng.lcong/ctor_result_type.pass.cpp

//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information. // See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// <random> // <random>
// template <class UIntType, UIntType a, UIntType c, UIntType m> // template <class UIntType, UIntType a, UIntType c, UIntType m>
// class linear_congruential_engine; // class linear_congruential_engine;
// explicit linear_congruential_engine(result_type s = default_seed); // explicit linear_congruential_engine(result_type s = default_seed); // before C++20
// linear_congruential_engine() : linear_congruential_engine(default_seed) {} // C++20
// explicit linear_congruential_engine(result_type s); // C++20
// Serializing/deserializing the state of the RNG requires iostreams // Serializing/deserializing the state of the RNG requires iostreams
// UNSUPPORTED: libcpp-has-no-localization // UNSUPPORTED: libcpp-has-no-localization
#include <random> #include <random>
#include <sstream> #include <sstream>
#include <cassert> #include <cassert>
#include "test_macros.h" #include "test_macros.h"
template <class T> template <class T>
std::string
to_string(T const &e)
{
std::ostringstream os;
os << e;
return os.str();
}
template <class T>
void void
test1() test1()
{ {
// c % m != 0 && s % m != 0 // c % m != 0 && s % m != 0
{ {
typedef std::linear_congruential_engine<T, 2, 3, 7> E; typedef std::linear_congruential_engine<T, 2, 3, 7> E;
E e(5); E e(5);
std::ostringstream os; assert(to_string(e) == "5");
os << e;
assert(os.str() == "5");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 3, 0> E; typedef std::linear_congruential_engine<T, 2, 3, 0> E;
E e(5); E e(5);
std::ostringstream os; assert(to_string(e) == "5");
os << e;
assert(os.str() == "5");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 3, 4> E; typedef std::linear_congruential_engine<T, 2, 3, 4> E;
E e(5); E e(5);
std::ostringstream os; assert(to_string(e) == "1");
os << e;
assert(os.str() == "1");
} }
} }
template <class T> template <class T>
void void
test2() test2()
{ {
// c % m != 0 && s % m == 0 // c % m != 0 && s % m == 0
{ {
typedef std::linear_congruential_engine<T, 2, 3, 7> E; typedef std::linear_congruential_engine<T, 2, 3, 7> E;
E e(7); E e(7);
std::ostringstream os; assert(to_string(e) == "0");
os << e;
assert(os.str() == "0");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 3, 0> E; typedef std::linear_congruential_engine<T, 2, 3, 0> E;
E e(0); E e(0);
std::ostringstream os; assert(to_string(e) == "0");
os << e;
assert(os.str() == "0");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 3, 4> E; typedef std::linear_congruential_engine<T, 2, 3, 4> E;
E e(4); E e(4);
std::ostringstream os; assert(to_string(e) == "0");
os << e;
assert(os.str() == "0");
} }
} }
template <class T> template <class T>
void void
test3() test3()
{ {
// c % m == 0 && s % m != 0 // c % m == 0 && s % m != 0
{ {
typedef std::linear_congruential_engine<T, 2, 0, 7> E; typedef std::linear_congruential_engine<T, 2, 0, 7> E;
E e(3); E e(3);
std::ostringstream os; assert(to_string(e) == "3");
os << e;
assert(os.str() == "3");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 0, 0> E; typedef std::linear_congruential_engine<T, 2, 0, 0> E;
E e(5); E e(5);
std::ostringstream os; assert(to_string(e) == "5");
os << e;
assert(os.str() == "5");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 0, 4> E; typedef std::linear_congruential_engine<T, 2, 0, 4> E;
E e(7); E e(7);
std::ostringstream os; assert(to_string(e) == "3");
os << e;
assert(os.str() == "3");
} }
} }
template <class T> template <class T>
void void
test4() test4()
{ {
// c % m == 0 && s % m == 0 // c % m == 0 && s % m == 0
{ {
typedef std::linear_congruential_engine<T, 2, 0, 7> E; typedef std::linear_congruential_engine<T, 2, 0, 7> E;
E e(7); E e(7);
std::ostringstream os; assert(to_string(e) == "1");
os << e;
assert(os.str() == "1");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 0, 0> E; typedef std::linear_congruential_engine<T, 2, 0, 0> E;
E e(0); E e(0);
std::ostringstream os; assert(to_string(e) == "1");
os << e;
assert(os.str() == "1");
} }
{ {
typedef std::linear_congruential_engine<T, 2, 0, 4> E; typedef std::linear_congruential_engine<T, 2, 0, 4> E;
E e(8); E e(8);
std::ostringstream os; assert(to_string(e) == "1");
os << e;
assert(os.str() == "1");
} }
} }
#if TEST_STD_VER > 17
template <class T, class... Args>
T
make_implicit(Args &&... args)
{
return {forward<Args>(args)...};
}
template <class T>
void
test5()
{
typedef std::linear_congruential_engine<T, 2, 0, 7> E;
auto e_default = make_implicit<E>();
auto e_1 = E(1);
assert(to_string(e_default) == to_string(e_1));
assert(to_string(e_default) == "1");
}
#endif
int main(int, char**) int main(int, char**)
{ {
test1<unsigned short>(); test1<unsigned short>();
test1<unsigned int>(); test1<unsigned int>();
test1<unsigned long>(); test1<unsigned long>();
test1<unsigned long long>(); test1<unsigned long long>();
test2<unsigned short>(); test2<unsigned short>();
test2<unsigned int>(); test2<unsigned int>();
test2<unsigned long>(); test2<unsigned long>();
test2<unsigned long long>(); test2<unsigned long long>();
test3<unsigned short>(); test3<unsigned short>();
test3<unsigned int>(); test3<unsigned int>();
test3<unsigned long>(); test3<unsigned long>();
test3<unsigned long long>(); test3<unsigned long long>();
test4<unsigned short>(); test4<unsigned short>();
test4<unsigned int>(); test4<unsigned int>();
test4<unsigned long>(); test4<unsigned long>();
test4<unsigned long long>(); test4<unsigned long long>();
#if TEST_STD_VER > 17
test5<unsigned short>();
test5<unsigned int>();
test5<unsigned long>();
test5<unsigned long long>();
#endif
return 0; return 0;
} }