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/// \file utils/text/regex.hpp
/// Utilities to build and match regular expressions.

#if !defined(UTILS_TEXT_REGEX_HPP)
#define UTILS_TEXT_REGEX_HPP

#include "utils/text/regex_fwd.hpp"

#include <cstddef>
#include <memory>


namespace utils {
namespace text {


/// Container for regex match results.
class regex_matches {
    struct impl;

    /// Pointer to shared implementation.
    std::shared_ptr< impl > _pimpl;

    friend class regex;
    regex_matches(std::shared_ptr< impl >);

public:
    ~regex_matches(void);

    std::size_t count(void) const;
    std::string get(const std::size_t) const;

    operator bool(void) const;
};


/// Regular expression compiler and executor.
///
/// All regular expressions handled by this class are "extended".
class regex {
    struct impl;

    /// Pointer to shared implementation.
    std::shared_ptr< impl > _pimpl;

    regex(std::shared_ptr< impl >);

public:
    ~regex(void);

    static regex compile(const std::string&, const std::size_t,
                         const bool = false);
    regex_matches match(const std::string&) const;
};


regex_matches match_regex(const std::string&, const std::string&,
                          const std::size_t, const bool = false);


}  // namespace text
}  // namespace utils

#endif  // !defined(UTILS_TEXT_REGEX_HPP)