#ifndef NCTREF_VARTABLE_H
#define NCTREF_VARTABLE_H

#include"types.h"

typedef enum {
	VARTABLEENTRY_SYMBOL, VARTABLEENTRY_TYPE, VARTABLEENTRY_VAR
} VarTableEntryKind;

typedef struct UseDef {
	union AST *use; //expr
	union AST *def; //assign stmt
	size_t t;
	struct UseDef *next;
} UseDef;

typedef struct VarTableEntry {
	Type *type;
	
	VarTableEntryKind kind;
	struct {
		union {
			struct {
				char isLocal;
				char isExternal;
				const char *name;
			} symbol;
			struct {
				uint16_t color, degree;
				size_t start, end;
				uint8_t priority;
				
				UseDef *usedefFirst;
				UseDef *usedefLast;
			} var;
		};
		struct VarTableEntry *offset;
	} data;
	
	void *userdata;
} VarTableEntry;

typedef struct VarTable {
	struct VarTable *parent;
	
	size_t count;
	const char **names;
	VarTableEntry **data;
} VarTable;

VarTable *vartable_new(VarTable*);
VarTableEntry *vartable_get(VarTable*, const char*);
VarTableEntry *vartable_find(VarTable*, const char*);
VarTableEntry *vartable_set(VarTable*, const char*, VarTableEntry*);

#endif