From 9ad6e6f21fbbefe9e38bc6b4b8d2a78f8cbca229 Mon Sep 17 00:00:00 2001
From: Tim Vaughan <tgvaughan@gmail.com>
Date: Thu, 21 Jul 2016 21:46:25 +1200
Subject: [PATCH] Implemented fixnum =.

---
 scheme-primitives.4th | 49 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/scheme-primitives.4th b/scheme-primitives.4th
index 87cbdd4..03d885b 100644
--- a/scheme-primitives.4th
+++ b/scheme-primitives.4th
@@ -212,6 +212,41 @@
     mod fixnum-type
 ; make-primitive remainder
 
+:noname ( args -- bool )
+
+    2dup nil objeq? if
+        true boolean-type exit
+    then
+
+    ( args )
+
+    2dup car fixnum-type ensure-arg-type ( args arg0 )
+    2swap cdr ( arg0 args' )
+
+    2dup nil objeq? if
+        2drop 2drop
+        true boolean-type exit
+    then
+
+    ( arg0 args' )
+
+    begin
+        2dup nil objeq? false =
+    while
+        2dup car fixnum-type ensure-arg-type ( arg0 args' arg1 )
+        2rot 2dup 2rot ( args' arg0 arg0 arg1 )
+        objeq? false = if
+            2drop 2drop
+            false boolean-type exit
+        then
+
+        2swap cdr ( arg0 args'' )
+    repeat
+
+    2drop 2drop
+    true boolean-type
+; make-primitive =
+
 ( = Pairs and Lists = )
 
 :noname ( args -- pair )
@@ -221,6 +256,10 @@
     cons
 ; make-primitive cons
 
+:noname ( args -- list )
+    \ args is already a list!
+; make-primitive list
+
 :noname ( args -- pair )
     2dup 1 ensure-arg-count
     car pair-type ensure-arg-type
@@ -254,3 +293,13 @@
 
     ok-symbol
 ; make-primitive set-cdr!
+
+( = Polymorphic equality testing = )
+
+:noname ( args -- bool )
+    2dup 2 ensure-arg-count
+    2dup cdr car
+    2swap car
+
+    objeq? boolean-type
+; make-primitive eq?
-- 
2.20.1