Parse harmony let declarations.

test/cctest/test-parsing.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 47 matching lines @@
   i::byte buffer[32];
   for (int i = 0; (key_token = keywords[i]).keyword != NULL; i++) {
     const i::byte* keyword =
         reinterpret_cast<const i::byte*>(key_token.keyword);
     int length = i::StrLength(key_token.keyword);
     CHECK(static_cast<int>(sizeof(buffer)) >= length);
     {
       i::Utf8ToUC16CharacterStream stream(keyword, length);
       i::JavaScriptScanner scanner(&unicode_cache);
       scanner.Initialize(&stream);
+      // The scanner should parse 'let' as Token::LET for this test.
+      scanner.SetHarmonyBlockScoping(true);
       CHECK_EQ(key_token.token, scanner.Next());
       CHECK_EQ(i::Token::EOS, scanner.Next());
     }
     // Removing characters will make keyword matching fail.
     {
       i::Utf8ToUC16CharacterStream stream(keyword, length - 1);
       i::JavaScriptScanner scanner(&unicode_cache);
       scanner.Initialize(&stream);
       CHECK_EQ(i::Token::IDENTIFIER, scanner.Next());
       CHECK_EQ(i::Token::EOS, scanner.Next());
@@ skipping 202 matching lines @@
   const char* program = "var x = 'something';\n"
                         "escape: function() {}";
   // Fails parsing expecting an identifier after "function".
   // Before fix, didn't check *ok after Expect(Token::Identifier, ok),
   // and then used the invalid currently scanned literal. This always
   // failed in debug mode, and sometimes crashed in release mode.
 
   i::Utf8ToUC16CharacterStream stream(reinterpret_cast<const i::byte*>(program),
                                       static_cast<unsigned>(strlen(program)));
   i::ScriptDataImpl* data =
-      i::ParserApi::PreParse(&stream, NULL);
+      i::ParserApi::PreParse(&stream, NULL, false);
   CHECK(data->HasError());
   delete data;
 }
 
 
 TEST(Regress928) {
   v8::V8::Initialize();
 
   // Preparsing didn't consider the catch clause of a try statement
   // as with-content, which made it assume that a function inside
   // the block could be lazily compiled, and an extra, unexpected,
   // entry was added to the data.
   int marker;
   i::Isolate::Current()->stack_guard()->SetStackLimit(
       reinterpret_cast<uintptr_t>(&marker) - 128 * 1024);
 
   const char* program =
       "try { } catch (e) { var foo = function () { /* first */ } }"
       "var bar = function () { /* second */ }";
 
   i::Utf8ToUC16CharacterStream stream(reinterpret_cast<const i::byte*>(program),
                                       static_cast<unsigned>(strlen(program)));
   i::ScriptDataImpl* data =
-      i::ParserApi::PartialPreParse(&stream, NULL);
+      i::ParserApi::PartialPreParse(&stream, NULL, false);
   CHECK(!data->HasError());
 
   data->Initialize();
 
   int first_function =
       static_cast<int>(strstr(program, "function") - program);
   int first_lbrace = first_function + static_cast<int>(strlen("function () "));
   CHECK_EQ('{', program[first_lbrace]);
   i::FunctionEntry entry1 = data->GetFunctionEntry(first_lbrace);
   CHECK(!entry1.is_valid());
@@ skipping 372 matching lines @@
   TestScanRegExp("/[\\u12]/flipperwald", "[\\u12]");
   TestScanRegExp("/[\\u123]/flipperwald", "[\\u123]");
   // Escaped ']'s wont end the character class.
   TestScanRegExp("/[\\]/]/flipperwald", "[\\]/]");
   // Escaped slashes are not terminating.
   TestScanRegExp("/\\//flipperwald", "\\/");
   // Starting with '=' works too.
   TestScanRegExp("/=/", "=");
   TestScanRegExp("/=?/", "=?");
 }