1 files changed, 22 insertions, 1 deletions

diff --git a/src/bootstrap/primitives.c b/src/bootstrap/primitives.c
index 97058f9..61ce360 100644
--- a/src/bootstrap/primitives.c
+++ b/src/bootstrap/primitives.c
@@ -309,5 +309,26 @@ proc_or(Object *args) {
     return obj_false;
 }
 
-// TODO: if/cond
+Object *
+proc_if(Object *args) {
+    if (args->type != OBJ_TYPE_PAIR || args->cdr->type != OBJ_TYPE_PAIR) {
+        fprintf(stderr, "error: wrong number of arguments.\n");
+        return NULL;
+    }
+
+    Object *condition = eval(args->car);
+    if (condition == obj_true) {
+        Object *ret = eval(args->cdr->car);
+        return ret;
+    }
+    if (args->cdr->cdr != obj_nil) {
+        Object *ret = eval(args->cdr->cdr->car);
+        return ret;
+    }
+
+    return obj_nil;
+}
+
+// TODO: cond
+// TODO: equality greater than smaller than...
 // TODO: fixnum left/right shift, mask, invert