[es6] Implement spec compliant ToPrimitive in the runtime.

test/mjsunit/harmony/to-primitive.js

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+assertEquals(1, %ToPrimitive(1));
+assertEquals(1, %ToPrimitive_Number(1));
+assertEquals(1, %ToPrimitive_String(1));
+assertEquals(1, %_ToPrimitive(1));
+assertEquals(1, %_ToPrimitive_Number(1));
+assertEquals(1, %_ToPrimitive_String(1));
+
+assertEquals(.5, %ToPrimitive(.5));
+assertEquals(.5, %ToPrimitive_Number(.5));
+assertEquals(.5, %ToPrimitive_String(.5));
+assertEquals(.5, %_ToPrimitive(.5));
+assertEquals(.5, %_ToPrimitive_Number(.5));
+assertEquals(.5, %_ToPrimitive_String(.5));
+
+assertEquals(null, %ToPrimitive(null));
+assertEquals(null, %ToPrimitive_Number(null));
+assertEquals(null, %ToPrimitive_String(null));
+assertEquals(null, %_ToPrimitive(null));
+assertEquals(null, %_ToPrimitive_Number(null));
+assertEquals(null, %_ToPrimitive_String(null));
+
+assertEquals(true, %ToPrimitive(true));
+assertEquals(true, %ToPrimitive_Number(true));
+assertEquals(true, %ToPrimitive_String(true));
+assertEquals(true, %_ToPrimitive(true));
+assertEquals(true, %_ToPrimitive_Number(true));
+assertEquals(true, %_ToPrimitive_String(true));
+
+assertEquals(false, %ToPrimitive(false));
+assertEquals(false, %ToPrimitive_Number(false));
+assertEquals(false, %ToPrimitive_String(false));
+assertEquals(false, %_ToPrimitive(false));
+assertEquals(false, %_ToPrimitive_Number(false));
+assertEquals(false, %_ToPrimitive_String(false));
+
+assertEquals(undefined, %ToPrimitive(undefined));
+assertEquals(undefined, %ToPrimitive_Number(undefined));
+assertEquals(undefined, %ToPrimitive_String(undefined));
+assertEquals(undefined, %_ToPrimitive(undefined));
+assertEquals(undefined, %_ToPrimitive_Number(undefined));
+assertEquals(undefined, %_ToPrimitive_String(undefined));
+
+assertEquals("random text", %ToPrimitive("random text"));
+assertEquals("random text", %ToPrimitive_Number("random text"));
+assertEquals("random text", %ToPrimitive_String("random text"));
+assertEquals("random text", %_ToPrimitive("random text"));
+assertEquals("random text", %_ToPrimitive_Number("random text"));
+assertEquals("random text", %_ToPrimitive_String("random text"));
+
+assertEquals(Symbol.toPrimitive, %ToPrimitive(Symbol.toPrimitive));
+assertEquals(Symbol.toPrimitive, %ToPrimitive_Number(Symbol.toPrimitive));
+assertEquals(Symbol.toPrimitive, %ToPrimitive_String(Symbol.toPrimitive));
+assertEquals(Symbol.toPrimitive, %_ToPrimitive(Symbol.toPrimitive));
+assertEquals(Symbol.toPrimitive, %_ToPrimitive_Number(Symbol.toPrimitive));
+assertEquals(Symbol.toPrimitive, %_ToPrimitive_String(Symbol.toPrimitive));
+
+var a = { toString: function() { return "xyz" }};
+assertEquals("xyz", %ToPrimitive(a));
+assertEquals("xyz", %ToPrimitive_Number(a));
+assertEquals("xyz", %ToPrimitive_String(a));
+assertEquals("xyz", %_ToPrimitive(a));
+assertEquals("xyz", %_ToPrimitive_Number(a));
+assertEquals("xyz", %_ToPrimitive_String(a));
+assertEquals("xyz", %OrdinaryToPrimitive(a, "number"));
+assertEquals("xyz", %OrdinaryToPrimitive(a, "string"));
+assertEquals("xyz", %_OrdinaryToPrimitive(a, "number"));
+assertEquals("xyz", %_OrdinaryToPrimitive(a, "string"));
+
+var b = { valueOf: function() { return 42 }};
+assertEquals(42, %ToPrimitive(b));
+assertEquals(42, %ToPrimitive_Number(b));
+assertEquals("[object Object]", %ToPrimitive_String(b));
+assertEquals(42, %_ToPrimitive(b));
+assertEquals(42, %_ToPrimitive_Number(b));
+assertEquals("[object Object]", %_ToPrimitive_String(b));
+assertEquals(42, %OrdinaryToPrimitive(b, "number"));
+assertEquals("[object Object]", %OrdinaryToPrimitive(b, "string"));
+assertEquals(42, %_OrdinaryToPrimitive(b, "number"));
+assertEquals("[object Object]", %_OrdinaryToPrimitive(b, "string"));
+
+var c = {
+  toString: function() { return "x"},
+  valueOf: function() { return 123 }
+};
+assertEquals(123, %ToPrimitive(c));
+assertEquals(123, %ToPrimitive_Number(c));
+assertEquals("x", %ToPrimitive_String(c));
+assertEquals(123, %_ToPrimitive(c));
+assertEquals(123, %_ToPrimitive_Number(c));
+assertEquals("x", %_ToPrimitive_String(c));
+assertEquals(123, %OrdinaryToPrimitive(c, "number"));
+assertEquals("x", %OrdinaryToPrimitive(c, "string"));
+assertEquals(123, %_OrdinaryToPrimitive(c, "number"));
+assertEquals("x", %_OrdinaryToPrimitive(c, "string"));
+
+var d = {
+  [Symbol.toPrimitive]: function(hint) { return hint }
+};
+assertEquals("default", %ToPrimitive(d));
+assertEquals("number", %ToPrimitive_Number(d));
+assertEquals("string", %ToPrimitive_String(d));
+assertEquals("default", %_ToPrimitive(d));
+assertEquals("number", %_ToPrimitive_Number(d));
+assertEquals("string", %_ToPrimitive_String(d));