X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=prelude.js;h=38a13d7fdb52ce9d7d011b820d885498eed2ad8e;hb=ad19ec082d2d9aa6877cc0bbae9ec3fe3094f489;hp=cf976a04a6d06bf3cdd3a405032e6f170265d988;hpb=845aad879287d067fffa6a872e03a24935bf8fc6;p=jscl.git

diff --git a/prelude.js b/prelude.js
index cf976a0..38a13d7 100644
--- a/prelude.js
+++ b/prelude.js
@@ -1,13 +1,25 @@
-function pv (x) { return x ; }
+// This file is prepended to the result of compile ecmalisp.lisp, and
+// contain runtime code that ecmalisp assumes to exist.
+
+var window = this;
+var nil;
+
+function globalEval (x) {
+    return eval.call (window, x);
+}
+
+function pv (x) { return x==undefined? nil: x; }
 
 function mv(){
-    var r = [];
+    var r = [].slice.call(arguments);
     r['multiple-value'] = true;
-    for (var i=0; i<arguments.length; i++)
-        r.push(arguments[i]);
     return r;
 }
 
+function forcemv (x) {
+    return typeof x == 'object' && 'multiple-value' in x? x: mv(x);
+}
+
 // NOTE: Define VALUES to be MV for toplevel forms. It is because
 // `eval' compiles the forms and execute the Javascript code at
 // toplevel with `js-eval', so it is necessary to return multiple