From f87cfe33d2b9f52566fde25a7c5611966da7a9bc Mon Sep 17 00:00:00 2001
From: Sami Samhuri <sami.samhuri@gmail.com>
Date: Mon, 14 Dec 2009 00:10:15 -0800
Subject: [PATCH] add a hide-prompt function

---
 el/primitives.js | 4 ++++
 el/repl.js       | 4 +++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/el/primitives.js b/el/primitives.js
index 282ed6f..2a5f1a4 100644
--- a/el/primitives.js
+++ b/el/primitives.js
@@ -123,5 +123,9 @@ EL.definePrimitive('print', ['x'],
 	     return EL.nil;
 	 },
     "print an expression");
+
+EL.definePrimitive('hide-prompt', ['yes-or-no'],
+    function(bool){ EL.hidePrompt = !EL.isNil(bool); },
+    "Call with T to hide the prompt or nil to show it.");
 };
 EL.initHook(EL._definePrimitives);
\ No newline at end of file
diff --git a/el/repl.js b/el/repl.js
index 0a04f0c..25b41d9 100644
--- a/el/repl.js
+++ b/el/repl.js
@@ -31,7 +31,9 @@ EL.repl = function() {
     var p = new EL.Parser(),
 	e = new EL.Evaluator();
     while (true) {
-	print("elisp> "); // i don't want a newline, grrrr
+	if (!EL.hidePrompt) {
+	    print("elisp> "); // i don't want a newline, grrrr
+	}
 	try {
 	    var line = readline();
 	    while (!line) {