Reviewers: Erik Corry,
Description:
Fix bug in parser that allows "(foo):42" as a labeled statement.
Fixes issue 918.
Please review this at http://codereview.chromium.org/5044003/
Affected files:
M src/parser.cc
A test/mjsunit/regress/regress-918.js
Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index
a0f3b7147f20eda1457d4f41276c550d70b2b612..515eff3fb5428ff53ab0012fa51e38f379b4c109
100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -1692,11 +1692,13 @@ Statement*
Parser::ParseExpressionOrLabelledStatement(ZoneStringList* labels,
// ExpressionStatement | LabelledStatement ::
// Expression ';'
// Identifier ':' Statement
-
+ bool starts_with_idenfifier = (peek() == Token::IDENTIFIER);
Expression* expr = ParseExpression(true, CHECK_OK);
- if (peek() == Token::COLON && expr &&
+ if (peek() == Token::COLON && starts_with_idenfifier && expr &&
expr->AsVariableProxy() != NULL &&
!expr->AsVariableProxy()->is_this()) {
+ // Expression is a single identifier, and not, e.g., a parenthesized
+ // identifier.
VariableProxy* var = expr->AsVariableProxy();
Handle<String> label = var->name();
// TODO(1240780): We don't check for redeclaration of labels
Index: test/mjsunit/regress/regress-918.js
diff --git a/test/mjsunit/regress/regress-918.js
b/test/mjsunit/regress/regress-918.js
new file mode 100644
index
0000000000000000000000000000000000000000..4b6ddbacf8aef72c962508ce47abc3f369294793
--- /dev/null
+++ b/test/mjsunit/regress/regress-918.js
@@ -0,0 +1,33 @@
+// Copyright 2010 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
+// with the distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived
+// from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Parser should not accept parentheses around labels.
+// See http://code.google.com/p/v8/issues/detail?id=918
+
+// The label was parsed as an expression and then tested for being a
+// single identifier. This threw away the parentheses.
+assertThrows("(label):42;");
--
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