Fix issue where the strict mode was not detected when a comment was before "strict mode";

Fixes #54

1 files changed, 18 insertions, 2 deletions

diff --git a/lib/detectStrictMode.js b/lib/detectStrictMode.js
index 35f27fb..57dc14d 100644
--- a/lib/detectStrictMode.js
+++ b/lib/detectStrictMode.js
@@ -1,3 +1,7 @@
+var multiLineComment = /^\s*\/\*.*?\*\//;

+var singleLineComment = /^\s*\/\/.*?[\r\n]/;

+var strictMode = /^\s*(?:"use strict"|'use strict')[ \t]*(?:[\r\n]|;)/;

+

 /**

  * Returns true if the source code is intended to run in strict mode. Does not detect

  * "use strict" if it occurs in a nested function.

@@ -6,7 +10,19 @@
  * @return {Boolean}

  */

 function detectStrictMode(src) {

-    return (/^\s*(?:"use strict"|'use strict')[ \t]*(?:[\r\n]|;)/g).test(src);

+    var singleLine;

+    var multiLine;

+

+    while ((singleLine = singleLineComment.test(src)) || (multiLine = multiLineComment.test(src))) {

+        if (singleLine) {

+            src = src.replace(singleLineComment, "");

+        }

+        if (multiLine) {

+            src = src.replace(multiLineComment, "");

+        }

+    }

+

+    return strictMode.test(src);

 }

 

-module.exports = detectStrictMode;
\ No newline at end of file
+module.exports = detectStrictMode;