start implementing eval

1 files changed, 7 insertions, 0 deletions

diff --git a/lisp.h b/lisp.h
index 4053bd5..6ebf9a2 100644
--- a/lisp.h
+++ b/lisp.h
@@ -31,6 +31,8 @@ value *make_symbol(const char *sym);
 value *make_string(const char *str);
 value *make_nil();
 value *cons(value *car, value *cdr);
+value *car(value *cons);
+value *cdr(value *cons);
 
 void *print_value(value *val);
 // environments, TODO: make this use hashtable
@@ -47,4 +49,9 @@ env *env_create(env *parent);
 env *env_define(env *e, const char *sym, value *val);
 value *env_lookup(env *e, const char *sym);
 
+extern env *global_env;
+
+value *eval(env *e, value *val);
+value *eval_pair(env *e, value *val);
+
 #endif