regexp.h

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#ifndef _RE2C_IR_REGEXP_REGEXP_
#define _RE2C_IR_REGEXP_REGEXP_

#include "src/util/c99_stdint.h"
#include <iosfwd>
#include <set>
#include <vector>

#include "src/util/free_list.h"
#include "src/util/forbid_copy.h"

namespace re2c
{

struct nfa_state_t;
struct nfa_t;

typedef std::vector<uint32_t> charset_t;

class RegExp
{
public:
    static free_list <RegExp *> vFreeList;

    inline RegExp ()
    {
        vFreeList.insert (this);
    }
    inline virtual ~RegExp ()
    {
        vFreeList.erase (this);
    }
    virtual void split (std::set<uint32_t> &) = 0;
    virtual uint32_t calc_size() const = 0;
    virtual uint32_t fixedLength ();
    virtual nfa_state_t *compile(nfa_t &nfa, nfa_state_t *n) = 0;
    virtual void display (std::ostream &) const = 0;
    friend std::ostream & operator << (std::ostream & o, const RegExp & re);

    FORBID_COPY (RegExp);
};

RegExp * doAlt (RegExp * e1, RegExp * e2);
RegExp * mkAlt (RegExp * e1, RegExp * e2);
RegExp * doCat (RegExp * e1, RegExp * e2);
RegExp * repeat (RegExp * e, uint32_t n);
RegExp * repeat_from_to (RegExp * e, uint32_t n, uint32_t m);
RegExp * repeat_from (RegExp * e, uint32_t n);

} // end namespace re2c

#endif // _RE2C_IR_REGEXP_REGEXP_