ES6: Array.prototype.slice and friends should use ToLength instead of ToUint32

src/runtime.js

Index: src/runtime.js
diff --git a/src/runtime.js b/src/runtime.js
index 1503373d4a3fc6c78cc2630b039800f30c338b08..98b21ea3912f78529bad47f157864b2bbe176ffc 100644
--- a/src/runtime.js
+++ b/src/runtime.js
@@ -26,6 +26,8 @@ var $toPositiveInteger;
 var $toPrimitive;
 var $toString;
 
+var harmony_tolength = false;
+
 (function(global, utils) {
 
 %CheckIsBootstrapping();
@@ -712,6 +714,9 @@ function ToLength(arg) {
                                              : GlobalNumber.MAX_SAFE_INTEGER;
 }
 
+function ToLengthFlagged(arg) {

[Camillo Bruni, 2015/09/08 07:18:07]

I would create a TO_LENGTH macro out of this (see src/macros.py).

[aperez, 2015/09/09 12:48:43]

Acknowledged.

+  return (harmony_tolength) ? ToLength(arg) : TO_UINT32(arg);
+}
 
 // ES5, section 9.12
 function SameValue(x, y) {
@@ -903,6 +908,7 @@ utils.Export(function(to) {
   to.ToNumber = ToNumber;
   to.ToPrimitive = ToPrimitive;
   to.ToString = ToString;
+  to.ToLengthFlagged = ToLengthFlagged;
 });
 
 })