From 699024646cc934c5af33c604a3586a0d3d414424 Mon Sep 17 00:00:00 2001
From: Akshay <nerdy@peppe.rs>
Date: Thu, 5 Nov 2020 11:55:27 +0530
Subject: repl code, refactor into modules

---
 main.scm | 36 +++++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

diff --git a/main.scm b/main.scm
index 08a5a22..59dae1d 100644
--- a/main.scm
+++ b/main.scm
@@ -1,8 +1,10 @@
-(include "prelude/primitives.scm")
-(include "util/table.scm")
-(include "util/alist.scm")
+(add-to-load-path ".")
+(add-to-load-path "util/")
+(add-to-load-path "prelude/")
 
-(define (lift-bool expr) (if expr 'true 'false))
+(use-modules (environment))
+(use-modules (prelude/primitives))
+(use-modules (util/alist))
 
 (define (tagged? expr tag)
   (if (pair? expr)
@@ -32,11 +34,7 @@
 (define (operands expr) (cdr expr))
 (define (no-operands? expr) (null? expr))
 (define (list-of-values ls env)
-  (if (no-operands? ls)
-      '()
-      (let ([first (eval-expr (car ls) env)])
-        (let ([rest (list-of-values (cdr ls) env)])
-          (cons first rest)))))
+  (map (lambda (l) (eval-expr l env)) ls))
 
 ;;; quoted expressions
 (define (quote-form? expr) (tagged? expr 'quote))
@@ -70,3 +68,23 @@
   (cond
     [(primitive? proc) (apply-primitive-proc proc args)]
     [else 'false]))
+
+(define the-global-env (setup-environment))
+(define input-prompt ";;; CIRCLE INPUT ")
+(define output-prompt ";;; CIRCLE OUTPUT ")
+(define (driver-loop)
+  (begin
+    (newline)
+    (display input-prompt)
+    (newline)
+  (let ([input (read)])
+    (let ([output (eval-expr input the-global-env)])
+      (begin
+        (display output-prompt)
+        (newline)
+        (show-lisp-expr output)
+        (newline)
+        (driver-loop))))))
+
+(define (show-lisp-expr object)
+  (display object))
-- 
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