BaseArgument.hpp

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#pragma once

#include <string>
#include <vector>
#include <memory>
#include <stdexcept>

namespace TAP {

class Argument;

class BaseArgument {
protected:
    bool m_required = false;

public:
    BaseArgument() {
    }

    BaseArgument(const BaseArgument&) = default;

    BaseArgument(BaseArgument&&) = default;

    virtual ~BaseArgument() {
    }

    BaseArgument& operator=(const BaseArgument&) = default;

    BaseArgument& operator=(BaseArgument&&) = default;

    virtual void find_all_arguments(std::vector<const Argument*>& collector) const = 0;

    explicit operator bool() const {
        return count() > 0;
    }


    virtual unsigned int count() const = 0;

    // Test operations

    BaseArgument& set_required(bool required = true) {
        m_required = required;
        return *this;
    }

    bool required() const {
        return m_required;
    }

    virtual void check_valid() const = 0;

    virtual std::string usage() const = 0;

    virtual std::unique_ptr<BaseArgument> clone() const & = 0;

    virtual std::unique_ptr<BaseArgument> clone() && = 0;

};

}