Change interpretation of malformed \c? escapes in RegExp to match JSC.

test/mjsunit/regexp.js

 // Copyright 2008 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 66 matching lines @@
 result = s.match(re);
 assertEquals(result.length, 7);
 assertEquals(result[0], 'A');
 assertEquals(result[1], 'B');
 assertEquals(result[2], 'C');
 assertEquals(result[3], '\r');
 assertEquals(result[4], 'D');
 assertEquals(result[5], 'E');
 assertEquals(result[6], 'F');
 
-// Some tests from the Mozilla tests, where our behavior differs from
+// Some tests from the Mozilla tests, where our behavior used to differ from
 // SpiderMonkey.
 // From ecma_3/RegExp/regress-334158.js
 assertTrue(/\ca/.test( "\x01" ));
 assertFalse(/\ca/.test( "\\ca" ));
-// Passes in KJS, fails in IrregularExpressions.
-// See http://code.google.com/p/v8/issues/detail?id=152
-//assertTrue(/\c[a/]/.test( "\x1ba/]" ));
-
+assertFalse(/\ca/.test( "ca" ));
+assertTrue(/\c[a/]/.test( "\\ca" ));
+assertTrue(/\c[a/]/.test( "\\c/" ));
 
 // Test \c in character class
 re = /^[\cM]$/;
 assertTrue(re.test("\r"));
 assertFalse(re.test("M"));
 assertFalse(re.test("c"));
 assertFalse(re.test("\\"));
 assertFalse(re.test("\x03"));  // I.e., read as \cc
 
 re = /^[\c]]$/;
 assertTrue(re.test("c]"));
-assertFalse(re.test("\\]"));
+assertTrue(re.test("\\]"));
 assertFalse(re.test("\x1d"));  // ']' & 0x1f
-assertFalse(re.test("\\]"));
 assertFalse(re.test("\x03]"));  // I.e., read as \cc
 
+re = /^[\c1]$/;  // Digit control characters are masked in character classes.
+assertTrue(re.test("\x11"));
+assertFalse(re.test("\\"));
+assertFalse(re.test("c"));
+assertFalse(re.test("1"));
+
+re = /^[\c_]$/;  // Underscore control character is masked in character classes.
+assertTrue(re.test("\x1f"));
+assertFalse(re.test("\\"));
+assertFalse(re.test("c"));
+assertFalse(re.test("_"));
+
+re = /^[\c$]$/;  // Other characters are interpreted literally.
+assertFalse(re.test("\x04"));
+assertTrue(re.test("\\"));
+assertTrue(re.test("c"));
+assertTrue(re.test("$"));
+
+assertTrue(/^[Z-\c-e]*$/.test("Z[\\cde"));
 
 // Test that we handle \s and \S correctly inside some bizarre
 // character classes.
 re = /[\s-:]/;
 assertTrue(re.test('-'));
 assertTrue(re.test(':'));
 assertTrue(re.test(' '));
 assertTrue(re.test('\t'));
 assertTrue(re.test('\n'));
 assertFalse(re.test('a'));
@@ skipping 530 matching lines @@
 // Only partially anchored.
 var re = /(?:a|bc$)/;
 assertTrue(re.test("a"));
 assertTrue(re.test("bc"));
 assertEquals(["a"], re.exec("abc"));
 assertEquals(4, re.exec("zimzamzumba").index);
 assertEquals(["bc"], re.exec("zimzomzumbc"));
 assertFalse(re.test("c"));
 assertFalse(re.test(""));