grapheme_splitter.hpp

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#if !defined(TETENGO_TEXT_GRAPHEMESPLITTER_HPP)
#define TETENGO_TEXT_GRAPHEMESPLITTER_HPP
 
#include <cstddef>
#include <locale>
#include <memory>
#include <string_view>
#include <vector>
 
#include <boost/core/noncopyable.hpp>
#include <boost/operators.hpp>
 
 
namespace tetengo::text
{
    class grapheme : public boost::equality_comparable<grapheme>
    {
    public:
        // constructors and destructor
 
        constexpr grapheme(std::size_t offset, std::size_t width) : m_offset{ offset }, m_width{ width } {}
 
 
        // functions
 
        [[nodiscard]] friend constexpr bool operator==(const grapheme& one, const grapheme& another)
        {
            return one.m_offset == another.m_offset && one.m_width == another.m_width;
        }
 
        [[nodiscard]] constexpr std::size_t offset() const
        {
            return m_offset;
        }
 
        [[nodiscard]] constexpr std::size_t width() const
        {
            return m_width;
        }
 
 
    private:
        // variables
 
        std::size_t m_offset;
 
        std::size_t m_width;
    };
 
 
    class grapheme_splitter : private boost::noncopyable
    {
    public:
        // constructors and destructor
 
        explicit grapheme_splitter(const std::locale& locale_ = std::locale{ "" });
 
        virtual ~grapheme_splitter();
 
 
        // functions
 
        [[nodiscard]] std::vector<grapheme> split(const std::string_view& string_) const;
 
 
    private:
        // types
 
        class impl;
 
 
        // variables
 
        const std::unique_ptr<impl> m_p_impl;
    };
 
 
}
 
 
#endif