error.hpp

// The MIT License (MIT)

// Copyright (c) 2012-2014 Danny Y., Rapptz

// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef GEARS_OPTPARSE_ERROR_HPP
#define GEARS_OPTPARSE_ERROR_HPP

#include <string>
#include <stdexcept>

namespace gears {
namespace optparse {
class error : public std::runtime_error {
public:
    std::string program_name;
    std::string option_name;
    std::string error_string;
    error(const std::string& name, const std::string& str, const std::string& op):
        std::runtime_error(name + ": error: " + str), program_name(name), option_name(op), error_string(str) {}
};

class unrecognised_option : public error {
public:
    unrecognised_option(const std::string& name, const std::string& op):
    error(name, "unrecognised option '" + op + '\'', op) {}
};

class missing_required_option : public error {
public:
    missing_required_option(const std::string& name, const std::string& op):
    error(name, "missing required option '" + op + '\'', op) {}
};

class missing_required_value : public error {
public:
    missing_required_value(const std::string& name, const std::string& op, size_t nargs):
    error(name, nargs == 1 ?
                "option '" + op + "' requires an argument" :
                "option '" + op + "' requires " + std::to_string(nargs) + " arguments", op) {}
};

class option_takes_no_value : public error {
public:
    option_takes_no_value(const std::string& name, const std::string& op):
    error(name, "option '" + op + "' does not take a value", op) {}
};
} // optparse
} // gears

#endif // GEARS_OPTPARSE_ERROR_HPP