TODO(#330)

[nothing.git] / src / script / expr.h

diff --git a/src/script/expr.h b/src/script/expr.h
index 01dfa6064321995a394e25b6518b27dca7765255..d3607579e382b6995a9a07c87aeb63b47eb945fd 100644 (file)
--- a/src/script/expr.h
+++ b/src/script/expr.h
@@ -1,15 +1,26 @@
 #ifndef ATOM_H_
 #define ATOM_H_
 
+#include <stdlib.h>
 #include <stdbool.h>
 
+typedef struct Gc Gc;
+
 struct Cons;
 struct Atom;
 
+// TODO(#321): get rid of gc argument from expr macros (just assume that it's `gc` in the current scope)
+#define NUMBER(G, X) atom_as_expr(create_number_atom(G, X))
+#define STRING(G, S) atom_as_expr(create_string_atom(G, S, NULL))
+#define SYMBOL(G, S) atom_as_expr(create_symbol_atom(G, S, NULL))
+#define CONS(G, CAR, CDR) cons_as_expr(create_cons(G, CAR, CDR))
+#define NIL(G) SYMBOL(G, "nil")
+
 enum ExprType
 {
     EXPR_ATOM = 0,
-    EXPR_CONS
+    EXPR_CONS,
+    EXPR_VOID
 };
 
 // TODO(#285): there is no way to execute struct Expr
@@ -22,10 +33,9 @@ struct Expr
     };
 };
 
-
-
 struct Expr atom_as_expr(struct Atom *atom);
 struct Expr cons_as_expr(struct Cons *cons);
+struct Expr void_expr(void);
 
 void destroy_expr(struct Expr expr);
 void print_expr_as_sexpr(struct Expr expr);
@@ -42,15 +52,16 @@ struct Atom
     enum AtomType type;
     union
     {
-        float num;             // ATOM_NUMBER
+        // TODO(#330): Atom doesn't support floats
+        long int num;               // ATOM_NUMBER
         char *sym;             // ATOM_SYMBOL
         char *str;             // ATOM_STRING
     };
 };
 
-struct Atom *create_number_atom(float num);
-struct Atom *create_string_atom(const char *str, const char *str_end);
-struct Atom *create_symbol_atom(const char *sym, const char *sym_end);
+struct Atom *create_number_atom(Gc *gc, long int num);
+struct Atom *create_string_atom(Gc *gc, const char *str, const char *str_end);
+struct Atom *create_symbol_atom(Gc *gc, const char *sym, const char *sym_end);
 void destroy_atom(struct Atom *atom);
 void print_atom_as_sexpr(struct Atom *atom);
 
@@ -60,7 +71,7 @@ struct Cons
     struct Expr cdr;
 };
 
-struct Cons *create_cons(struct Expr car, struct Expr cdr);
+struct Cons *create_cons(Gc *gc, struct Expr car, struct Expr cdr);
 void destroy_cons(struct Cons *cons);
 void print_cons_as_sexpr(struct Cons *cons);