[parser] Relex restriction on reserved words

src/parsing/parser-base.h

Index: src/parsing/parser-base.h
diff --git a/src/parsing/parser-base.h b/src/parsing/parser-base.h
index 46689d54c02bcb645cc658ef7481349764a85c5a..4b725ada226cbf7e807f39c403922d9781b96512 100644
--- a/src/parsing/parser-base.h
+++ b/src/parsing/parser-base.h
@@ -2774,6 +2774,8 @@ bool ParserBase<Traits>::IsNextLetKeyword() {
     case Token::LET:  // Yes, you can do let let = ... in sloppy mode

[Dan Ehrenberg, 2016/04/20 20:59:56]

Actually, this comment reflects a previous misunderstanding that I had. let let
= ... is disallowed. This is enforced in ParserBase::ParseAndClassifyIdentifier
(search for LetInLexicalBinding). It probably wouldn't change any behavior
(beyond how pretty the error messages are) to remove this line. Sorry for
leaving this out of date.

[mike3, 2016/04/21 19:51:20]

No worries; I'll remove this line while I'm at it.

     case Token::YIELD:
       return true;
+    case Token::FUTURE_STRICT_RESERVED_WORD:
+      return is_sloppy(language_mode());
     default:
       return false;
   }