From 07081ff18cbfffba3ad4194e2d193f902a5d9f1f Mon Sep 17 00:00:00 2001
From: Ben Toews <mastahyeti@users.noreply.github.com>
Date: Thu, 10 Sep 2015 14:11:15 -0600
Subject: [PATCH] allow ascii_only flag on compression

---
 bin/uglifyjs                |  3 +++
 lib/compress.js             |  1 +
 test/compress/ascii_only.js | 19 +++++++++++++++++++
 3 files changed, 23 insertions(+)
 create mode 100644 test/compress/ascii_only.js

diff --git a/bin/uglifyjs b/bin/uglifyjs
index 4768f766..95b303a8 100755
--- a/bin/uglifyjs
+++ b/bin/uglifyjs
@@ -225,6 +225,9 @@ if (ARGS.keep_fnames) {
 if (BEAUTIFY)
     UglifyJS.merge(OUTPUT_OPTIONS, BEAUTIFY);
 
+if (COMPRESS)
+    OUTPUT_OPTIONS.ascii_only = !!COMPRESS.ascii_only
+
 if (ARGS.comments != null) {
     if (/^\/.*\/[a-zA-Z]*$/.test(ARGS.comments)) {
         try {
diff --git a/lib/compress.js b/lib/compress.js
index 51dd66f8..94569ed2 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -74,6 +74,7 @@ function Compressor(options, false_by_default) {
         screw_ie8     : false,
         drop_console  : false,
         angular       : false,
+        ascii_only    : false,
 
         warnings      : true,
         global_defs   : {}
diff --git a/test/compress/ascii_only.js b/test/compress/ascii_only.js
new file mode 100644
index 00000000..58b632fb
--- /dev/null
+++ b/test/compress/ascii_only.js
@@ -0,0 +1,19 @@
+prevents_unicode_escape_sequences_from_being_converted: {
+    options = {ascii_only: true};
+    input: {
+        var a = "\u2000";
+    }
+    expect: {
+        var a = "\u2000";
+    }
+}
+
+converts_unicode_characters_to_escape_sequences: {
+    options = {ascii_only: true};
+    input: {
+        var a = " ";
+    }
+    expect: {
+        var a = "\u2000";
+    }
+}