From e068d45199bb23452821727e5b82a2307ae0256d Mon Sep 17 00:00:00 2001
From: Bad Diode <bd@badd10de.dev>
Date: Wed, 13 Oct 2021 17:18:31 +0200
Subject: Add eq? primitive procedure

---
 src/bootstrap/primitives.c | 47 ++++++++++++++++++++++++++++------------------
 1 file changed, 29 insertions(+), 18 deletions(-)

(limited to 'src/bootstrap/primitives.c')

diff --git a/src/bootstrap/primitives.c b/src/bootstrap/primitives.c
index 8369fa8..2a82782 100644
--- a/src/bootstrap/primitives.c
+++ b/src/bootstrap/primitives.c
@@ -880,21 +880,32 @@ proc_list(Environment *env, Object *obj) {
 // Polymorphic procedures.
 //
 
-//Object *
-//proc_equal(Object *args) {
-//    // TODO: stub
-//    (void) args;
-//    return NULL;
-//}
-
-//// TODO: fixnum left/right shift, mask, invert
-//// TODO: implement and test missing procedures
-//// TODO: add primitives for type transforms: string->symbol, symbol->string, etc
-//// TODO: properly implement nested environments
-//// TODO: implement support for quotes and semi-quotes
-//// TODO: LAMBDA
-//// TODO: let
-//// TODO: better error handling?
-//// TODO: Revise all instances where we are returning an object, since currently
-//// we may be returning a pointer to an object instead of a new one. Check also
-//// on eval function and everytime we do make_xxx(obj).
+Object *
+proc_equal(Environment *env, Object *obj) {
+    if (obj == obj_nil || obj->cdr == obj_nil) {
+        error_push((Error){
+            .type = ERR_TYPE_RUNTIME,
+            .value = ERR_NOT_ENOUGH_ARGS,
+        });
+        return obj_err;
+    }
+    Object *a = eval(env, obj->car);
+    if (a == obj_err) {
+        return obj_err;
+    }
+    Object *b = eval(env, obj->cdr->car);
+    if (b == obj_err) {
+        return obj_err;
+    }
+    return obj_eq(a, b) ? obj_true : obj_false;
+}
+
+
+// TODO: fixnum left/right shift, mask, invert
+// TODO: add primitives for type transforms: string->symbol, symbol->string, etc
+// TODO: implement support for semi-quotes
+// TODO: LAMBDA
+// TODO: let
+// TODO: Revise all instances where we are returning an object, since currently
+// we may be returning a pointer to an object instead of a new one. Check also
+// on eval function and everytime we do make_xxx(obj).
-- 
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