From 89946609f2de815ea87df3b001fff0caf9efa0d5 Mon Sep 17 00:00:00 2001
From: Graydon Hoare <graydon@mozilla.com>
Date: Tue, 9 Nov 2010 14:15:07 -0800
Subject: Support a special const-value refcount, use it for const strings.

---
 src/lib/_str.rs | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

(limited to 'src/lib/_str.rs')

diff --git a/src/lib/_str.rs b/src/lib/_str.rs
index 0fc7b373..4ea5ca28 100644
--- a/src/lib/_str.rs
+++ b/src/lib/_str.rs
@@ -97,8 +97,13 @@ fn from_bytes(vec[u8] v) : is_utf8(v) -> str {
 }
 
 fn refcount(str s) -> uint {
-    // -1 because calling this function incremented the refcount.
-    ret rustrt.refcount[u8](s) - 1u;
+    auto r = rustrt.refcount[u8](s);
+    if (r == dbg.const_refcount) {
+        ret r;
+    } else {
+        // -1 because calling this function incremented the refcount.
+        ret  r - 1u;
+    }
 }
 
 
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