exception.hpp

#ifndef CPPAD_CG_EXCEPTION_INCLUDED
#define CPPAD_CG_EXCEPTION_INCLUDED
/* --------------------------------------------------------------------------
 *  CppADCodeGen: C++ Algorithmic Differentiation with Source Code Generation:
 *    Copyright (C) 2012 Ciengis
 *    Copyright (C) 2019 Joao Leal
 *
 *  CppADCodeGen is distributed under multiple licenses:
 *
 *   - Eclipse Public License Version 1.0 (EPL1), and
 *   - GNU General Public License Version 3 (GPL3).
 *
 *  EPL1 terms and conditions can be found in the file "epl-v10.txt", while
 *  terms and conditions for the GPL3 can be found in the file "gpl3.txt".
 * ----------------------------------------------------------------------------
 * Author: Joao Leal
 */

namespace CppAD {
namespace cg {

class CGException : public std::exception {
protected:
    std::string _message;

public:

    inline explicit CGException(std::string message) noexcept :
        _message(std::move(message)) {
    }

    inline CGException(const CGException& e) = default;

    inline CGException(CGException&& e) = default;

    template<typename... Ts>
    explicit CGException(const Ts&... ts) noexcept {
        std::ostringstream s;
        createMessage(s, ts...);
        _message = s.str();
    }

    CGException() noexcept = delete;

    const char* what() const noexcept override {
        return _message.c_str();
    }

    ~CGException() noexcept override = default;

private:

    template <typename T, typename... Ts>
    inline void createMessage(std::ostringstream& s, const T& t, const Ts&... ts) noexcept {
        s << t;
        createMessage(s, ts...);
    }

    template <typename T>
    inline void createMessage(std::ostringstream& s, const T& t) noexcept {
        s << t;
    }

};

inline std::ostream& operator<<(std::ostream& out, const CGException& rhs) {
    out << rhs.what();
    return out;
}

} // END cg namespace
} // END CppAD namespace

#endif