Revision: 11661
Author:   [email protected]
Date:     Fri May 25 03:52:38 2012
Log: Fix creating substring in string.replace(<global regexp>, <function>).

BUG=
TEST=regexp-global.js

Review URL: https://chromiumcodereview.appspot.com/10454032
http://code.google.com/p/v8/source/detail?r=11661

Modified:
 /branches/bleeding_edge/src/runtime.cc
 /branches/bleeding_edge/test/mjsunit/regexp-global.js

=======================================
--- /branches/bleeding_edge/src/runtime.cc      Wed May 23 07:24:29 2012
+++ /branches/bleeding_edge/src/runtime.cc      Fri May 25 03:52:38 2012
@@ -3955,7 +3955,6 @@
             match = isolate->factory()->NewSubString(subject,
                                                      match_start,
                                                      match_end);
-            first = false;
           }
           elements->set(0, *match);
           for (int i = 1; i <= capture_count; i++) {
@@ -3963,8 +3962,14 @@
             if (start >= 0) {
               int end = current_match[i * 2 + 1];
               ASSERT(start <= end);
-              Handle<String> substring =
- isolate->factory()->NewProperSubString(subject, start, end);
+              Handle<String> substring;
+              if (!first) {
+                substring =
+ isolate->factory()->NewProperSubString(subject, start, end);
+              } else {
+                substring =
+                    isolate->factory()->NewSubString(subject, start, end);
+              }
               elements->set(i, *substring);
             } else {
               ASSERT(current_match[i * 2 + 1] < 0);
@@ -3975,6 +3980,7 @@
           elements->set(capture_count + 2, *subject);
builder->Add(*isolate->factory()->NewJSArrayWithElements(elements));
         }
+        first = false;
       }

       // If we did not get the maximum number of matches, we can stop here
=======================================
--- /branches/bleeding_edge/test/mjsunit/regexp-global.js Tue May 22 07:05:44 2012 +++ /branches/bleeding_edge/test/mjsunit/regexp-global.js Fri May 25 03:52:38 2012
@@ -125,3 +125,8 @@
                     return match.length - 7;
                   });
 assertEquals("4, 2!", str);
+
+// Test capture that is a real substring.
+var str = "Beasts of England, beasts of Ireland";
+str = str.replace(/(.*)/g, function(match) { return '~'; });
+assertEquals("~~");

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