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#pragma once
#include <u.h>
#include <libn.h>
enum
{
Toperator = RuneMask + 1,
Tstart = Toperator,
Trparen,
Tlparen,
Tor,
Tcat,
Tstar,
Tplus,
Tqmark,
Tany = Toperator << 1,
Tnop,
Tbol,
Teol,
Tcclass,
Tnclass,
Tend,
isoptor = Toperator,
isopand = Toperator << 1,
};
typedef struct Class Class;
typedef struct State State;
typedef struct Patch Patch;
typedef struct Node Node;
typedef struct Parser Parser;
typedef struct Machine Machine;
struct Class
{
rune *end;
rune span[64];
};
struct State
{
int type;
union {
State *l;
};
union {
State *r;
State *out;
};
};
struct Patch
{
State *s;
Patch *link;
};
struct Node
{
State *beg;
State *end;
};
struct Parser
{
Machine *mach;
byte *re;
int wasopand : 1;
int *optor, optorstk[1000];
Node *node, nodestk[1000];
};
struct Machine
{
/* memory buffers */
struct {
void *heap;
memยทReallocator;
};
State *state, statestk[1000];
struct {
int cap;
int len;
Class *c;
} class;
State *entry;
};
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