RegExp: Add support for the ES6-proposed sticky flag

test/mjsunit/harmony/regexp-sticky.js

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+
+// 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);