RegExp: Add support for the ES6-proposed sticky flag

test/mjsunit/regexp-not-sticky-yet.js

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-// Flags: --allow-natives-syntax
+// Test that sticky regexp support is not affecting V8 when the
+// --harmony-regexps flag is not on.
 
-var o = {a:1.5};
-o.a = 0;
-var a = o.a;
+assertThrows(function() { eval("/foo.bar/y"); }, SyntaxError);
+assertThrows(function() { eval("/foobar/y"); }, SyntaxError);
+assertThrows(function() { eval("/foo.bar/gy"); }, SyntaxError);
+assertThrows(function() { eval("/foobar/gy"); }, SyntaxError);
+assertThrows(function() { new RegExp("foo.bar", "y"); }, SyntaxError);
+assertThrows(function() { new RegExp("foobar", "y"); }, SyntaxError);
+assertThrows(function() { new RegExp("foo.bar", "gy"); }, SyntaxError);
+assertThrows(function() { new RegExp("foobar", "gy"); }, SyntaxError);
 
-function g() {
-  return 1;
-}
+var re = /foo.bar/;
+assertEquals("/foo.bar/", "" + re);
+var plain = /foobar/;
+assertEquals("/foobar/", "" + plain);
 
-var o2 = {a:{}};
+var global = /foo.bar/g;
+assertEquals("/foo.bar/g", "" + global);
+var plainglobal = /foobar/g;
+assertEquals("/foobar/g", "" + plainglobal);
 
-function f() {
-  var result = {a: a};
-  var literal = {x:g()};
-  return [result, literal];
-}
+assertEquals(void 0, re.sticky);
+re.sticky = true; // Has no effect on the regexp, just sets a property.
+assertTrue(re.sticky);
 
-f();
-f();
-%OptimizeFunctionOnNextCall(f);
-assertEquals(1, f()[1].x);
+assertTrue(re.test("..foo.bar"));