[regexp] Experimental support for regexp named captures

src/regexp/jsregexp.cc

Index: src/regexp/jsregexp.cc
diff --git a/src/regexp/jsregexp.cc b/src/regexp/jsregexp.cc
index fe04fbc9cff40f6f9e31f1f01bc33bf39990ec9e..1a9d50b5090c5635576a78eb8a40c37c46c19701 100644
--- a/src/regexp/jsregexp.cc
+++ b/src/regexp/jsregexp.cc
@@ -397,6 +397,7 @@ bool RegExpImpl::CompileIrregexp(Handle<JSRegExp> re,
 
   Handle<FixedArray> data = Handle<FixedArray>(FixedArray::cast(re->data()));
   data->set(JSRegExp::code_index(is_one_byte), result.code);
+  SetIrregexpCaptureNameMap(*data, compile_data.capture_name_map);
   int register_max = IrregexpMaxRegisterCount(*data);
   if (result.num_registers > register_max) {
     SetIrregexpMaxRegisterCount(*data, result.num_registers);
@@ -416,6 +417,11 @@ void RegExpImpl::SetIrregexpMaxRegisterCount(FixedArray* re, int value) {
   re->set(JSRegExp::kIrregexpMaxRegisterCountIndex, Smi::FromInt(value));
 }
 
+void RegExpImpl::SetIrregexpCaptureNameMap(FixedArray* re,
+                                           Handle<FixedArray> value) {
+  re->set(JSRegExp::kIrregexpCaptureNameMapIndex,
+          value.is_null() ? nullptr : *value);

[Yang, 2016/06/13 10:54:52]

let's store undefined or Smi::FromInt(0) instead.

[jgruber, 2016/06/13 13:09:59]

Done.

+}
 
 int RegExpImpl::IrregexpNumberOfCaptures(FixedArray* re) {
   return Smi::cast(re->get(JSRegExp::kIrregexpCaptureCountIndex))->value();