typemeta_StaticString/test.cpp

/* +------------------------------------------------------------------------+
   |                     Mobile Robot Programming Toolkit (MRPT)            |
   |                          http://www.mrpt.org/                          |
   |                                                                        |
   | Copyright (c) 2005-2018, Individual contributors, see AUTHORS file     |
   | See: http://www.mrpt.org/Authors - All rights reserved.                |
   | Released under BSD License. See details in http://www.mrpt.org/License |
   +------------------------------------------------------------------------+ */
/** \example typemeta_StaticString/test.cpp */
 
//! [example sstring]
#include <mrpt/typemeta/static_string.h>
#include <iostream>
 
void Test_StaticString()
{
        using namespace std;
        using namespace mrpt::typemeta;
 
        constexpr string_literal<3> s = "foo";
        cout << "string_literal<3>=" << s << endl;
 
        constexpr auto a = literal("foo");
        constexpr auto b = literal("bar");
        // In GCC7 this can be "constexpr", but it fails in MSVC 2017 (!)
        auto ab = a + b;
        cout << "a=" << a << endl;
        cout << "b=" << b << endl;
        cout << "a+b=" << ab << endl;
 
        static_assert(ab.size() == 6, "***");
        cout << "(a+b).size()=" << ab.size() << endl;
        cout << "(a+b)[0]=" << ab[0] << endl;
        cout << "(a+b)[5]=" << ab[5] << endl;
}
//! [example sstring]
 
//! [example num2str]
#include <mrpt/typemeta/num_to_string.h>
#include <iostream>
 
void Test_StaticNum2Str()
{
        using namespace std;
        using namespace mrpt::typemeta;
 
        constexpr auto n42 = num_to_string<42>::value;
        constexpr auto n9999 = num_to_string<9999>::value;
        cout << "42 as string=" << n42 << endl;
        cout << "9999 as string=" << n9999 << endl;
}
//! [example num2str]
 
int main(int argc, char** argv)
{
        try
        {
                Test_StaticString();
                return 0;
        }
        catch (std::exception& e)
        {
                std::cout << "Exception: " << e.what() << std::endl;
                return -1;
        }
}