From 6b6d3dadc24fa7031f9e173b77eb3d313ea8ee62 Mon Sep 17 00:00:00 2001
From: Hackerpilot <briancschott@gmail.com>
Date: Fri, 28 Feb 2014 15:05:35 -0800
Subject: [PATCH] Enhanced string intern API

---
 stdx/lexer.d | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/stdx/lexer.d b/stdx/lexer.d
index 86eca05..2508d73 100644
--- a/stdx/lexer.d
+++ b/stdx/lexer.d
@@ -803,17 +803,20 @@ public:
         return intern(str, hash);
     }
 
+    /**
+     * ditto
+     */
+    string intern(string str) pure nothrow @safe
+    {
+        return intern(cast(const(ubyte)[]) str);
+    }
+
     /**
      * Caches a string as above, but uses the given hash code instead of
      * calculating one itself. Use this alongside $(LREF hashStep)() can reduce the
      * amount of work necessary when lexing dynamic tokens.
      */
     string intern(const(ubyte)[] str, uint hash) pure nothrow @safe
-    in
-    {
-        assert (str.length > 0);
-    }
-    body
     {
         return _intern(str, hash);
     }
@@ -839,6 +842,8 @@ private:
 
     string _intern(const(ubyte)[] bytes, uint hash) pure nothrow @trusted
     {
+        if (bytes.length == 0)
+            return "";
         import core.atomic;
         import core.memory;
         shared ubyte[] mem;