9 #define NUMBER(X) atom_as_expr(create_number_atom(X))
10 #define STRING(S) atom_as_expr(create_string_atom(S, NULL))
11 #define SYMBOL(S) atom_as_expr(create_symbol_atom(S, NULL))
12 #define CONS(CAR, CDR) cons_as_expr(create_cons(CAR, CDR))
13 #define NIL SYMBOL("nil")
22 // TODO(#285): there is no way to execute struct Expr
32 struct Expr atom_as_expr(struct Atom *atom);
33 struct Expr cons_as_expr(struct Cons *cons);
34 struct Expr void_expr(void);
36 void destroy_expr(struct Expr expr);
37 void print_expr_as_sexpr(struct Expr expr);
51 float num; // ATOM_NUMBER
52 char *sym; // ATOM_SYMBOL
53 char *str; // ATOM_STRING
57 struct Atom *create_number_atom(float num);
58 struct Atom *create_string_atom(const char *str, const char *str_end);
59 struct Atom *create_symbol_atom(const char *sym, const char *sym_end);
60 void destroy_atom(struct Atom *atom);
61 void print_atom_as_sexpr(struct Atom *atom);
69 struct Cons *create_cons(struct Expr car, struct Expr cdr);
70 void destroy_cons(struct Cons *cons);
71 void print_cons_as_sexpr(struct Cons *cons);