cpp-game-engine/graphics/include/game/graphics/exception.h

//
//  exception.h
//  graphics
//
//  Created by Sam Jaffe on 7/6/19.
//  Copyright © 2019 Sam Jaffe. All rights reserved.
//

#pragma once

#include <stdexcept>
#include <string>

namespace graphics {
  struct file_read_error : std::runtime_error {
    file_read_error(std::string const & file)
        : std::runtime_error("Unable to read file " + file) {}
    file_read_error(std::string const & type, std::string const & file)
        : std::runtime_error("Unable to read " + type + " file " + file) {}
  };

  struct unknown_texture_format : std::runtime_error {
    unknown_texture_format(int components)
        : std::runtime_error("Invalid number of components provided: " +
                             std::to_string(components)) {}
  };

  template <typename E> struct unmapped_enum : std::logic_error {
    // TODO (sjaffe): This is just an int cast, which isn't all that helpful.
    // Instead, one might use  https://github.com/Neargye/magic_enum
    // or wait for C++ to implement that sort of thing through metaclasses, etc.
    unmapped_enum(E en)
        : std::logic_error("Unknown " + type_name + std::to_string((int)en)) {}
    unmapped_enum(std::string const & str)
        : std::logic_error("Unknown " + type_name + str) {}

    static std::string const type_name;
  };

  template <typename E>
  std::string const unmapped_enum<E>::type_name{typeid(E).name()};
}