From: David Vázquez <davazp@gmail.com>
Date: Wed, 19 Feb 2014 01:05:07 +0000 (+0100)
Subject: Boolean Lisp<->Javascript conversion
X-Git-Url: http://repo.macrolet.net/gitweb/?a=commitdiff_plain;h=50599fbc81fc665124ebb66ad01be4166df23b0e;p=jscl.git

Boolean Lisp<->Javascript conversion
---

diff --git a/src/boot.lisp b/src/boot.lisp
index d2c505f..a45bb73 100644
--- a/src/boot.lisp
+++ b/src/boot.lisp
@@ -52,6 +52,7 @@
 (defconstant t 't)
 (defconstant nil 'nil)
 (%js-vset "nil" nil)
+(%js-vset "t" t)
 
 (defmacro lambda (args &body body)
   `(function (lambda ,args ,@body)))
diff --git a/src/prelude.js b/src/prelude.js
index 9214436..9f78f4a 100644
--- a/src/prelude.js
+++ b/src/prelude.js
@@ -2,6 +2,8 @@
 // contain runtime code that jscl assumes to exist.
 
 var window = this;
+
+var t;
 var nil;
 
 var lisp = {};
@@ -116,6 +118,10 @@ function Symbol(name, package_name){
 function lisp_to_js (x) {
     if (typeof x == 'object' && 'length' in x && x.stringp == 1)
         return xstring(x);
+    else if (x === t)
+      return true;
+    else if (x === nil)
+      return false;
     else if (typeof x == 'function'){
         // Trampoline calling the Lisp function
         return (function(){
@@ -131,6 +137,10 @@ function lisp_to_js (x) {
 function js_to_lisp (x) {
     if (typeof x == 'string')
         return make_lisp_string(x);
+    else if (x === true)
+        return t;
+    else if (x === false)
+        return nil;
     else if (typeof x == 'function'){
         // Trampoline calling the JS function
         return (function(values, nargs){