label.h

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#ifndef _RE2C_CODEGEN_LABEL_
#define _RE2C_CODEGEN_LABEL_

#include <iosfwd> // ostream

#include "src/util/c99_stdint.h"

namespace re2c {

template <typename num_t> class counter_t;

// label public API:
//     - get first label
//     - compare labels
//     - get label width
//     - output label to std::ostream
//
// label private API (for label counter):
//     - get initial label
//     - get next label
class label_t
{
    static const uint32_t FIRST;
    uint32_t value;
    label_t ();
    void inc ();

public:
    static label_t first ();
    bool operator < (const label_t & l) const;
    uint32_t width () const;
    friend std::ostream & operator << (std::ostream & o, label_t l);

    friend class counter_t<label_t>;
};

} // namespace re2c

#endif // _RE2C_CODEGEN_LABEL_