online compiler and debugger for c/c++

/****************************************************************************** Online C++ Compiler. Code, Compile, Run and Debug C++ program online. Write your code in this editor and press "Run" button to compile and execute it. *******************************************************************************/ #include <iostream> #include <cstddef> #include <stdexcept> #include <cstring> #include <ostream> #ifndef _MSC_VER # if __cplusplus < 201103 # define CONSTEXPR11_TN # define CONSTEXPR14_TN # define NOEXCEPT_TN # elif __cplusplus < 201402 # define CONSTEXPR11_TN constexpr # define CONSTEXPR14_TN # define NOEXCEPT_TN noexcept # else # define CONSTEXPR11_TN constexpr # define CONSTEXPR14_TN constexpr # define NOEXCEPT_TN noexcept # endif #else // _MSC_VER # if _MSC_VER < 1900 # define CONSTEXPR11_TN # define CONSTEXPR14_TN # define NOEXCEPT_TN # elif _MSC_VER < 2000 # define CONSTEXPR11_TN constexpr # define CONSTEXPR14_TN # define NOEXCEPT_TN noexcept # else # define CONSTEXPR11_TN constexpr # define CONSTEXPR14_TN constexpr # define NOEXCEPT_TN noexcept # endif #endif // _MSC_VER class static_string { const char* const p_; const std::size_t sz_; public: typedef const char* const_iterator; template <std::size_t N> CONSTEXPR11_TN static_string(const char(&a)[N]) NOEXCEPT_TN : p_(a) , sz_(N-1) {} CONSTEXPR11_TN static_string(const char* p, std::size_t N) NOEXCEPT_TN : p_(p) , sz_(N) {} CONSTEXPR11_TN const char* data() const NOEXCEPT_TN {return p_;} CONSTEXPR11_TN std::size_t size() const NOEXCEPT_TN {return sz_;} CONSTEXPR11_TN const_iterator begin() const NOEXCEPT_TN {return p_;} CONSTEXPR11_TN const_iterator end() const NOEXCEPT_TN {return p_ + sz_;} CONSTEXPR11_TN char operator[](std::size_t n) const { return n < sz_ ? p_[n] : throw std::out_of_range("static_string"); } }; inline std::ostream& operator<<(std::ostream& os, static_string const& s) { return os.write(s.data(), s.size()); } template <class T> CONSTEXPR14_TN static_string type_name() { #ifdef __clang__ static_string p = __PRETTY_FUNCTION__; return static_string(p.data() + 31, p.size() - 31 - 1); #elif defined(__GNUC__) static_string p = __PRETTY_FUNCTION__; # if __cplusplus < 201402 return static_string(p.data() + 36, p.size() - 36 - 1); # else return static_string(p.data() + 46, p.size() - 46 - 1); # endif #elif defined(_MSC_VER) static_string p = __FUNCSIG__; return static_string(p.data() + 38, p.size() - 38 - 7); #endif } using namespace std; template <typename ValueType> class Matrix { /* ... */ public: template <typename CompatibleType> auto operator+(Matrix<CompatibleType> const & other) -> Matrix<decltype(ValueType()+CompatibleType())> { return Matrix<decltype(ValueType()+CompatibleType())>(); } ValueType data; }; // template <typename ValueType, typename CompatibleType> // auto operator+(Matrix<ValueType> const & one, Matrix<CompatibleType> const & other) // -> Matrix<decltype(ValueType()+CompatibleType())> // { // return Matrix<decltype(ValueType()+CompatibleType())>(); // } int main() { int a = 0; float b = 0; cout << type_name<decltype(double() + float())>() << std::endl; Matrix<int> c; Matrix<float> d; cout << type_name<decltype(c + d)>() << std::endl; return 0; }