Parser sync tests for `let` identifiers

R=marja@chromium.org
BUG=

Review URL: https://codereview.chromium.org/385613002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22324 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/parser.cc

@@ -2013,6 +2013,7 @@ Block* Parser::ParseVariableDeclarations(
     is_const = true;
     needs_init = true;
   } else if (peek() == Token::LET && strict_mode() == STRICT) {
+    ASSERT(allow_harmony_scoping());
     Consume(Token::LET);
     if (var_context == kStatement) {
       // Let declarations are only allowed in source element positions.
@@ -3052,6 +3053,7 @@ Statement* Parser::ParseForStatement(ZoneList<const AstRawString*>* labels,
         init = variable_statement;
       }
     } else if (peek() == Token::LET && strict_mode() == STRICT) {
+      ASSERT(allow_harmony_scoping());
       const AstRawString* name = NULL;
       VariableDeclarationProperties decl_props = kHasNoInitializers;
       Block* variable_statement =

test/cctest/test-parsing.cc

@@ -1749,9 +1749,43 @@ TEST(ErrorsReservedWords) {
 }
 
 
+TEST(NoErrorsLetSloppyAllModes) {
+  // In sloppy mode, it's okay to use "let" as identifier.
+  const char* context_data[][2] = {
+    { "", "" },
+    { "function f() {", "}" },
+    { "(function f() {", "})" },
+    { NULL, NULL }
+  };
+
+  const char* statement_data[] = {
+    "var let;",
+    "var foo, let;",
+    "try { } catch (let) { }",
+    "function let() { }",
+    "(function let() { })",
+    "function foo(let) { }",
+    "function foo(bar, let) { }",
+    "let = 1;",
+    "var foo = let = 1;",
+    "let * 2;",
+    "++let;",
+    "let++;",
+    "let: 34",
+    "function let(let) { let: let(let + let(0)); }",
+    "({ let: 1 })",
+    "({ get let() { 1 } })",
+    "let(100)",
+    NULL
+  };
+
+  RunParserSyncTest(context_data, statement_data, kSuccess);
+}
+
+
 TEST(NoErrorsYieldSloppyAllModes) {
   // In sloppy mode, it's okay to use "yield" as identifier, *except* inside a
-  // generator (see next test).
+  // generator (see other test).
   const char* context_data[][2] = {
     { "", "" },
     { "function not_gen() {", "}" },
@@ -1769,19 +1803,19 @@ TEST(NoErrorsYieldSloppyAllModes) {
     "function foo(bar, yield) { }",
     "yield = 1;",
     "var foo = yield = 1;",
+    "yield * 2;",
     "++yield;",
     "yield++;",
     "yield: 34",
-    "function yield(yield) { yield: yield (yield + yield (0)); }",
+    "function yield(yield) { yield: yield (yield + yield(0)); }",
     "({ yield: 1 })",
     "({ get yield() { 1 } })",
-    "yield (100)",
+    "yield(100)",
+    "yield[100]",
     NULL
   };
 
-  static const ParserFlag always_flags[] = {kAllowArrowFunctions};
-  RunParserSyncTest(context_data, statement_data, kSuccess, NULL, 0,
-                    always_flags, ARRAY_SIZE(always_flags));
+  RunParserSyncTest(context_data, statement_data, kSuccess);
 }
 
 
@@ -1809,20 +1843,20 @@ TEST(NoErrorsYieldSloppyGeneratorsEnabled) {
     "(function * yield() { })",
     "yield = 1;",
     "var foo = yield = 1;",
+    "yield * 2;",
     "++yield;",
     "yield++;",
     "yield: 34",
-    "function yield(yield) { yield: yield (yield + yield (0)); }",
+    "function yield(yield) { yield: yield (yield + yield(0)); }",
     "({ yield: 1 })",
     "({ get yield() { 1 } })",
-    "yield (100)",
+    "yield(100)",
+    "yield[100]",
     NULL
   };
 
   // This test requires kAllowGenerators to succeed.
-  static const ParserFlag always_true_flags[] = {
-    kAllowGenerators
-  };
+  static const ParserFlag always_true_flags[] = { kAllowGenerators };
   RunParserSyncTest(context_data, statement_data, kSuccess, NULL, 0,
                     always_true_flags, 1);
 }