PrusaSlicer-NonPlainar/tests/cpp17/main.cpp

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#include <cstdlib>
#include <iostream>
#include <tuple>
#include <string>
// Test new headers in cpp17
#include <variant>
#include <optional>
#include <any>
#include <string_view>
// Test for nested namespace definition
namespace PrusaSlicer::Cpp17 {
template<class T> class Foo
{
T m_arg;
public:
explicit Foo(T &&arg): m_arg{arg} {}
};
} // namespace PrusaSlicer::Cpp17
template<class T> std::string get_type(const T &v);
template<> std::string get_type(const int &) { return "int"; }
template<> std::string get_type(const double &) { return "double"; }
template<> std::string get_type(const float &) { return "double"; }
int main()
{
// /////////////////////////////////////////////////////////////////////////
// Template argument deduction for class templates
// /////////////////////////////////////////////////////////////////////////
auto foo = PrusaSlicer::Cpp17::Foo{1.f};
// /////////////////////////////////////////////////////////////////////////
// Structured bindings:
// /////////////////////////////////////////////////////////////////////////
auto my_tuple = std::make_tuple(0.2, 10);
auto [a, b] = my_tuple;
std::cout << "a is " << get_type(a) << std::endl;
std::cout << "b is " << get_type(b) << std::endl;
// /////////////////////////////////////////////////////////////////////////
// Test for std::apply()
// /////////////////////////////////////////////////////////////////////////
auto fun = [] (auto a, auto b) {
std::cout << "a (" << get_type(a) << ") = " << a << std::endl;
std::cout << "b (" << get_type(b) << ") = " << b << std::endl;
};
std::apply(fun, my_tuple);
// /////////////////////////////////////////////////////////////////////////
// constexpr lambda and if
// /////////////////////////////////////////////////////////////////////////
auto isIntegral = [](auto v) constexpr -> bool {
if constexpr (std::is_integral_v<decltype(v)>) {
return true;
} else {
return false;
}
};
static_assert (isIntegral(10), "" );
// would fail to compile: static_assert (isIntegral(10.0), "" );
2019-12-06 08:28:17 +00:00
std::cout << "Integer is integral: " << isIntegral(0) << std::endl;
std::cout << "Floating point is not integral: " << isIntegral(0.0) << std::endl;
return EXIT_SUCCESS;
}