cpp-argument-parser/include/program_args/exception.h

#pragma once

#include <stdexcept>

namespace program {

class ProgramArgumentsError : public std::logic_error {
  using std::logic_error::logic_error;
};

class ArgumentMixingError : public ProgramArgumentsError {
public:
  ArgumentMixingError()
      : ProgramArgumentsError("Cannot mix together argument() and action() clauses in a program") {}
};

class ArgumentStructureError : public ProgramArgumentsError {
public:
  ArgumentStructureError(std::string const & desc, std::string const & name)
      : ProgramArgumentsError(desc + " for argument " + name) {}
};

class NotAnArgumentError : public ProgramArgumentsError {
public:
  NotAnArgumentError(std::string const & name)
      : ProgramArgumentsError("Unknown argument provided: " + name) {}
};

class IllegalPositionError : public ProgramArgumentsError {
public:
  IllegalPositionError(std::string const & desc, size_t index)
      : ProgramArgumentsError(desc + " at index " + std::to_string(index)) {}
};

}