RegExp: Add support for the ES6-proposed sticky flag

test/mjsunit/harmony/regexp-sticky.js

Index: test/mjsunit/harmony/regexp-sticky.js
diff --git a/test/mjsunit/harmony/regexp-sticky.js b/test/mjsunit/harmony/regexp-sticky.js
new file mode 100644
index 0000000000000000000000000000000000000000..d864e51dbc95ad1fa086be4d2f02084bc4c83390
--- /dev/null
+++ b/test/mjsunit/harmony/regexp-sticky.js
@@ -0,0 +1,103 @@
+// Copyright 2014 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.
+
+// Flags: --harmony-regexps
+
+var re = /foo.bar/;
+
+assertTrue(!!"foo*bar".match(re));
+assertTrue(!!"..foo*bar".match(re));
+
+var plain = /foobar/;
+
+assertTrue(!!"foobar".match(plain));
+assertTrue(!!"..foobar".match(plain));
+
+var sticky = /foo.bar/y;
+
+assertTrue(!!"foo*bar".match(sticky));
+assertFalse(!!"..foo*bar".match(sticky));
+
+var stickyplain = /foobar/y;
+
+assertTrue(!!"foobar".match(stickyplain));
+assertFalse(!!"..foobar".match(stickyplain));

[Yang, 2014/09/15 09:23:16]

According to 21.2.5.2.2, 19, we should set .lastIndex when the regexp is sticky
or global. This is not tested anywhere here.

[Erik Corry, 2014/09/16 17:49:40]

Done.

+
+var global = /foo.bar/g;
+
+assertTrue(global.test("foo*bar"));
+assertFalse(global.test("..foo*bar"));
+global.lastIndex = 0;
+assertTrue(global.test("..foo*bar"));
+
+var plainglobal = /foobar/g;
+
+assertTrue(plainglobal.test("foobar"));
+assertFalse(plainglobal.test("foobar"));
+plainglobal.lastIndex = 0;
+assertTrue(plainglobal.test("foobar"));
+
+var stickyglobal = /foo.bar/gy;
+
+assertTrue(stickyglobal.test("foo*bar"));
+assertFalse(stickyglobal.test("..foo*bar"));
+stickyglobal.lastIndex = 0;
+assertFalse(stickyglobal.test("..foo*bar"));
+stickyglobal.lastIndex = 2;
+assertTrue(stickyglobal.test("..foo*bar"));
+
+var stickyplainglobal = /foobar/yg;
+assertTrue(stickyplainglobal.sticky);
+stickyplainglobal.sticky = false;
+
+assertTrue(stickyplainglobal.test("foobar"));
+assertFalse(stickyplainglobal.test("..foobar"));
+stickyplainglobal.lastIndex = 0;
+assertFalse(stickyplainglobal.test("..foobar"));
+stickyplainglobal.lastIndex = 2;
+assertTrue(stickyplainglobal.test("..foobar"));
+
+assertEquals("/foo.bar/gy", "" + stickyglobal);
+assertEquals("/foo.bar/g", "" + global);
+
+assertTrue(stickyglobal.sticky);
+stickyglobal.sticky = false;
+assertTrue(stickyglobal.sticky);
+
+var stickyglobal2 = new RegExp("foo.bar", "gy");
+assertTrue(stickyglobal2.test("foo*bar"));
+assertFalse(stickyglobal2.test("..foo*bar"));
+stickyglobal2.lastIndex = 0;
+assertFalse(stickyglobal2.test("..foo*bar"));
+stickyglobal2.lastIndex = 2;
+assertTrue(stickyglobal2.test("..foo*bar"));
+
+assertEquals("/foo.bar/gy", "" + stickyglobal2);
+
+assertTrue(stickyglobal2.sticky);
+stickyglobal2.sticky = false;
+assertTrue(stickyglobal2.sticky);