Addressing Mads' comments from http://codereview.chromium.org/3585010/show.

Review URL: http://codereview.chromium.org/3613009

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5588 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -1372,6 +1372,10 @@ class Date : public Value {
  */
 class RegExp : public Value {
  public:
+  /**
+   * Regular expression flag bits. They can be or'ed to enable a set
+   * of flags.
+   */
   enum Flags {
     kNone = 0,
     kGlobal = 1,
@@ -1379,6 +1383,16 @@ class RegExp : public Value {
     kMultiline = 4
   };
 
+  /**
+   * Creates a regular expression from the given pattern string and
+   * the flags bit field. May throw a JavaScript exception as
+   * described in ECMA-252, 15.10.4.1.
+   *
+   * For example,
+   *   RegExp::New(v8::String::New("foo"),
+   *               static_cast<RegExp::Flags>(kGlobal | kMultiline))
+   * is equivalent to evaluating "/foo/gm".
+   */
   V8EXPORT static Local<RegExp> New(Handle<String> pattern,
                                     Flags flags);
 
@@ -1388,6 +1402,9 @@ class RegExp : public Value {
    */
   V8EXPORT Local<String> GetSource() const;
 
+  /**
+   * Returns the flags bit field.
+   */
   V8EXPORT Flags GetFlags() const;
 
   static inline RegExp* Cast(v8::Value* obj);

src/api.cc

@@ -3754,14 +3754,9 @@ Local<v8::RegExp> v8::RegExp::New(Handle<String> pattern,
   LOG_API("RegExp::New");
   ENTER_V8;
   EXCEPTION_PREAMBLE();
-  i::Handle<i::String> flags_string = RegExpFlagsToString(flags);
-  i::Object** argv[2] = {
-    i::Handle<i::Object>::cast(Utils::OpenHandle(*pattern)).location(),
-    i::Handle<i::Object>::cast(flags_string).location()
-  };
-  i::Handle<i::Object> obj = i::Execution::New(
-      i::Handle<i::JSFunction>(i::Top::global_context()->regexp_function()),
-      2, argv,
+  i::Handle<i::JSRegExp> obj = i::Execution::NewJSRegExp(
+      Utils::OpenHandle(*pattern),
+      RegExpFlagsToString(flags),
       &has_pending_exception);
   EXCEPTION_BAILOUT_CHECK(Local<v8::RegExp>());
   return Utils::ToLocal(i::Handle<i::JSRegExp>::cast(obj));

src/execution.cc

@@ -473,6 +473,19 @@ Handle<Object> Execution::NewDate(double time, bool* exc) {
 #undef RETURN_NATIVE_CALL
 
 
+Handle<JSRegExp> Execution::NewJSRegExp(Handle<String> pattern,
+                                        Handle<String> flags,
+                                        bool* exc) {
+  Handle<Object> re_obj = RegExpImpl::CreateRegExpLiteral(
+      Handle<JSFunction>(Top::global_context()->regexp_function()),
+      pattern,
+      flags,
+      exc);
+  if (*exc) return Handle<JSRegExp>();
+  return Handle<JSRegExp>::cast(re_obj);
+}
+
+
 Handle<Object> Execution::CharAt(Handle<String> string, uint32_t index) {
   int int_index = static_cast<int>(index);
   if (int_index < 0 || int_index >= string->length()) {

src/execution.h

@@ -105,6 +105,11 @@ class Execution : public AllStatic {
   // Create a new date object from 'time'.
   static Handle<Object> NewDate(double time, bool* exc);
 
+  // Create a new regular expression object from 'pattern' and 'flags'.
+  static Handle<JSRegExp> NewJSRegExp(Handle<String> pattern,
+                                      Handle<String> flags,
+                                      bool* exc);
+
   // Used to implement [] notation on strings (calls JS code)
   static Handle<Object> CharAt(Handle<String> str, uint32_t index);
 

test/cctest/test-api.cc

@@ -11715,4 +11715,11 @@ TEST(RegExp) {
 
   context->Global()->Set(v8_str("re"), re);
   ExpectTrue("re.test('FoobarbaZ')");
+
+  v8::TryCatch try_catch;
+  re = v8::RegExp::New(v8_str("foo["), v8::RegExp::kNone);
+  CHECK(re.IsEmpty());
+  CHECK(try_catch.HasCaught());
+  context->Global()->Set(v8_str("ex"), try_catch.Exception());
+  ExpectTrue("ex instanceof SyntaxError");
 }