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#ifndef BDL_OBJECTS_H
#define BDL_OBJECTS_H
#include "string_view.h"
#include "darray.h"
#include "chunk.h"
typedef enum ObjectType {
OBJ_TYPE_NIL,
OBJ_TYPE_TRUE,
OBJ_TYPE_FALSE,
OBJ_TYPE_FIXNUM,
OBJ_TYPE_SYMBOL,
OBJ_TYPE_STRING,
OBJ_TYPE_PAIR,
OBJ_TYPE_LAMBDA,
OBJ_TYPE_ERR,
} ObjectType;
typedef struct Object {
ObjectType type;
bool marked;
union {
// OBJ_TYPE_FIXNUM
ssize_t fixnum;
// OBJ_TYPE_STRING
// OBJ_TYPE_SYMBOL
char *text;
// OBJ_TYPE_PAIR
// struct {
// struct Object *car;
// struct Object *cdr;
// };
// OBJ_TYPE_LAMBDA
Chunk *chunk;
// struct {
// struct Object *params;
// struct Object *body;
// struct Environment *env;
// };
};
} Object;
Object make_string(StringView sv);
Object make_symbol(StringView sv);
Object make_lambda(StringView name);
void object_display(Object obj);
void object_free(Object obj);
bool object_equal(Object a, Object b);
Object object_copy(Object src);
// Value initialization.
#define NIL_VAL ((Object){.type = OBJ_TYPE_NIL})
#define TRUE_VAL ((Object){.type = OBJ_TYPE_TRUE})
#define FALSE_VAL ((Object){.type = OBJ_TYPE_FALSE})
#define FIXNUM_VAL(VAL) ((Object){.type = OBJ_TYPE_FIXNUM, .fixnum = VAL})
#define BOOL_VAL(VAL) ((VAL) ? TRUE_VAL : FALSE_VAL)
// Value extraction.
#define AS_FIXNUM(VAL) ((VAL).fixnum)
// Type checking.
#define IS_TRUE(VAL) ((VAL).type != OBJ_TYPE_FALSE)
#define IS_FALSE(VAL) ((VAL).type == OBJ_TYPE_FALSE)
#define IS_FIXNUM(VAL) ((VAL).type == OBJ_TYPE_FIXNUM)
#define IS_STRING(VAL) ((VAL).type == OBJ_TYPE_STRING)
#define IS_SYMBOL(VAL) ((VAL).type == OBJ_TYPE_SYMBOL)
#define IS_LAMBDA(VAL) ((VAL).type == OBJ_TYPE_LAMBDA)
#endif // BDL_OBJECTS_H
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