From fc00f4c2a426a9cb5ea7d2ba7a371b61e200813f Mon Sep 17 00:00:00 2001
From: Sami Vaarala <sami.vaarala@iki.fi>
Date: Thu, 15 Dec 2016 02:04:25 +0200
Subject: [PATCH 1/4] Typedarray ES6 inheritance changes

---
 src-input/builtins.yaml | 241 ++++++++++++++++++++++------------------
 1 file changed, 131 insertions(+), 110 deletions(-)

diff --git a/src-input/builtins.yaml b/src-input/builtins.yaml
index 525e3d6c..a5ad8857 100644
--- a/src-input/builtins.yaml
+++ b/src-input/builtins.yaml
@@ -485,7 +485,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -493,7 +493,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Object"
-        attributes: ""
+        attributes: "c"
 
       - key: "getPrototypeOf"
         value:
@@ -672,7 +672,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -680,7 +680,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Function"
-        attributes: ""
+        attributes: "c"
 
   # Note, unlike other prototype objects, Function.prototype is itself
   # a Function and callable.  When invoked, it accepts any arguments
@@ -699,7 +699,7 @@ objects:
     properties:
       - key: "length"
         value: 0
-        attributes: ""
+        attributes: "c"
         present_if: DUK_USE_FUNCTION_BUILTIN
       - key: "constructor"
         value:
@@ -708,16 +708,10 @@ objects:
         attributes: "wc"
         present_if: DUK_USE_FUNCTION_BUILTIN
 
-      # Each built-in of class Function has a "name" which is
-      # non-writable (the empty string above).  Function.prototype
-      # is a special case: it is a function but we want it's name
-      # to be writable so that user code can set a "name" property
-      # for Duktape/C functions.  If the Function.prototype.name
-      # property were non-writable, that would be prevented due to
-      # standard Ecmascript property write semantics.
+      # In ES6 Function.prototype.name is not writable, but is configurable.
       - key: "name"
         value: ""
-        attributes: "w"
+        attributes: "c"
         #present_if: DUK_USE_FUNCTION_BUILTIN  # Kept even when prototype is otherwise empty to guarantee a .name for functions
 
       # test262 ch15/15.3/15.3.4/15.3.4.2/S15.3.4.2_A11 checks that Function.prototype.toString.length
@@ -763,7 +757,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -771,7 +765,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Array"
-        attributes: ""
+        attributes: "c"
       - key: "isArray"
         value:
           type: function
@@ -974,7 +968,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -982,7 +976,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "String"
-        attributes: ""
+        attributes: "c"
 
       - key: "fromCharCode"
         value:
@@ -1203,7 +1197,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -1211,7 +1205,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Boolean"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_boolean_prototype
     class: Boolean
@@ -1264,7 +1258,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -1272,7 +1266,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Number"
-        attributes: ""
+        attributes: "c"
       - key: "MAX_VALUE"
         value:
           type: double
@@ -1372,7 +1366,7 @@ objects:
     properties:
       - key: "length"
         value: 7
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -1380,7 +1374,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Date"
-        attributes: ""
+        attributes: "c"
 
       - key: "parse"
         value:
@@ -1763,7 +1757,7 @@ objects:
     properties:
       - key: "length"
         value: 2
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -1771,7 +1765,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "RegExp"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_regexp_prototype
     class: Object  # Object in ES6; RegExp in ES5
@@ -1893,7 +1887,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -1901,7 +1895,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "Error"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_error_prototype
     class: Error
@@ -2000,7 +1994,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -2008,7 +2002,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "EvalError"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_eval_error_prototype
     class: Error
@@ -2040,7 +2034,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -2048,7 +2042,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "RangeError"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_range_error_prototype
     class: Error
@@ -2080,7 +2074,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -2088,7 +2082,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "ReferenceError"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_reference_error_prototype
     class: Error
@@ -2120,7 +2114,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -2128,7 +2122,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "SyntaxError"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_syntax_error_prototype
     class: Error
@@ -2160,7 +2154,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -2168,7 +2162,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "TypeError"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_type_error_prototype
     class: Error
@@ -2200,7 +2194,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
       - key: "prototype"
         value:
           type: object
@@ -2208,7 +2202,7 @@ objects:
         attributes: ""
       - key: "name"
         value: "URIError"
-        attributes: ""
+        attributes: "c"
 
   - id: bi_uri_error_prototype
     class: Error
@@ -2498,11 +2492,12 @@ objects:
     properties:
       - key: "length"
         value: 0
-        attributes: ""
-      # custom name, matches V8
+        attributes: "c"
+      # Custom name, matches V8; ES2016 describes %ThrowTypeError% as being
+      # anonymous.
       - key: "name"
         value: "ThrowTypeError"
-        attributes: ""
+        attributes: "c"
         duktape: true
 
   #
@@ -2604,7 +2599,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
         duktape: true
       - key: "prototype"
         value:
@@ -2614,7 +2609,7 @@ objects:
         duktape: true
       - key: "name"
         value: "Thread"
-        attributes: ""
+        attributes: "c"
         duktape: true
 
       # "yield" is a reserved word but does not prevent its use as a property name
@@ -2687,7 +2682,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
         duktape: true
       - key: "prototype"
         value:
@@ -2697,7 +2692,7 @@ objects:
         duktape: true
       - key: "name"
         value: "Pointer"
-        attributes: ""
+        attributes: "c"
         duktape: true
 
   - id: bi_pointer_prototype
@@ -2775,11 +2770,11 @@ objects:
     properties:
       - key: "length"
         value: 2
-        attributes: ""
+        attributes: "c"
         es6: true
       - key: "name"
         value: "Proxy"
-        attributes: ""
+        attributes: "c"
         es6: true
       #- key: "revocable"
       #  value:
@@ -2905,7 +2900,7 @@ objects:
     properties:
       - key: "length"
         value: 1
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -2915,12 +2910,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "ArrayBuffer"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
 
       - key: "isView"
         value:
@@ -2994,7 +2987,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3004,12 +2997,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "DataView"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
 
   - id: bi_dataview_prototype
     class: Object
@@ -3256,6 +3247,45 @@ objects:
         typedarray: true
         es6: true
 
+  # %TypedArray% constructor
+  # Prototype object providing properties shared by all TypedArray
+  # constructors.  Callable, but duk_bi_typedarray_constructor()
+  # rejects normal calls with TypeError; not constructable which
+  # rejects constructor calls with TypeError.
+  - id: bi_typedarray_constructor
+    class: Function
+    internal_prototype: bi_function_prototype
+    varargs: false
+    native: duk_bi_typedarray_constructor
+    callable: true
+    constructable: false
+    magic: 0
+    typedarray: true
+    es6: true
+    bidx: true
+    present_if: DUK_USE_BUFFEROBJECT_SUPPORT
+
+    properties:
+      - key: "length"
+        value: 0
+        attributes: "c"
+        typedarray: true
+        es6: true
+      - key: "prototype"
+        value:
+          type: object
+          id: bi_typedarray_prototype
+        attributes: ""
+        es6: true
+      - key: "name"
+        value: "TypedArray"
+        attributes: "c"
+        es6: true
+
+      # .from
+      # .of
+      # @@species getter
+
   # %TypedArrayPrototype%
   # Prototype object providing properties shared by all TypedArray
   # instances (reduces built-in object count).  The view specific prototypes
@@ -3265,7 +3295,7 @@ objects:
   - id: bi_typedarray_prototype
     class: Object
     internal_prototype: bi_object_prototype
-    # no external_constructor (specific views provide it)
+    # no external_prototype (specific views provide it)
     typedarray: true
     es6: true
     bidx: true
@@ -3292,7 +3322,7 @@ objects:
 
   - id: bi_int8array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3309,7 +3339,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3319,11 +3349,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Int8Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 1
         attributes: ""
@@ -3349,7 +3378,7 @@ objects:
 
   - id: bi_uint8array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3366,7 +3395,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3376,11 +3405,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Uint8Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 1
         attributes: ""
@@ -3406,7 +3434,7 @@ objects:
 
   - id: bi_uint8clampedarray_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3423,7 +3451,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3433,11 +3461,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Uint8ClampedArray"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 1
         attributes: ""
@@ -3463,7 +3490,7 @@ objects:
 
   - id: bi_int16array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3480,7 +3507,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3490,11 +3517,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Int16Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 2
         attributes: ""
@@ -3520,7 +3546,7 @@ objects:
 
   - id: bi_uint16array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3537,7 +3563,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3547,11 +3573,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Uint16Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 2
         attributes: ""
@@ -3577,7 +3602,7 @@ objects:
 
   - id: bi_int32array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3594,7 +3619,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3604,11 +3629,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Int32Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 4
         attributes: ""
@@ -3634,7 +3658,7 @@ objects:
 
   - id: bi_uint32array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3651,7 +3675,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3661,11 +3685,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Uint32Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 4
         attributes: ""
@@ -3691,7 +3714,7 @@ objects:
 
   - id: bi_float32array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3708,7 +3731,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3718,11 +3741,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Float32Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 4
         attributes: ""
@@ -3748,7 +3770,7 @@ objects:
 
   - id: bi_float64array_constructor
     class: Function
-    internal_prototype: bi_function_prototype
+    internal_prototype: bi_typedarray_constructor
     varargs: false
     native: duk_bi_typedarray_constructor
     callable: true
@@ -3765,7 +3787,7 @@ objects:
     properties:
       - key: "length"
         value: 3
-        attributes: ""
+        attributes: "c"
         typedarray: true
         es6: true
       - key: "prototype"
@@ -3775,11 +3797,10 @@ objects:
         attributes: ""
         typedarray: true
         es6: true
-      # matches V8, not specified explicitly in Khronos spec
       - key: "name"
         value: "Float64Array"
-        attributes: ""
-        duktape: true
+        attributes: "c"
+        es6: true
       - key: "BYTES_PER_ELEMENT"
         value: 8
         attributes: ""
@@ -3821,7 +3842,7 @@ objects:
     properties:
       - key: "length"
         value: 2
-        attributes: ""
+        attributes: "c"
         nodejs_buffer: true
       - key: "prototype"
         value:
@@ -3831,7 +3852,7 @@ objects:
         nodejs_buffer: true
       - key: "name"
         value: "Buffer"
-        attributes: ""
+        attributes: "c"
         nodejs_buffer: true
 
       - key: "concat"
@@ -4432,7 +4453,7 @@ objects:
     properties:
       - key: "length"
         value: 0
-        attributes: ""
+        attributes: "c"
         encoding_api: true
       - key: "prototype"
         value:
@@ -4442,7 +4463,7 @@ objects:
         encoding_api: true
       - key: "name"
         value: "TextEncoder"
-        attributes: ""
+        attributes: "c"
         encoding_api: true
 
   - id: bi_textencoder_prototype
@@ -4490,7 +4511,7 @@ objects:
     properties:
       - key: "length"
         value: 0
-        attributes: ""
+        attributes: "c"
         encoding_api: true
       - key: "prototype"
         value:
@@ -4500,7 +4521,7 @@ objects:
         encoding_api: true
       - key: "name"
         value: "TextDecoder"
-        attributes: ""
+        attributes: "c"
         encoding_api: true
 
   - id: bi_textdecoder_prototype

From 82b2e34364c75d11880f865cae3de923f2ab58d5 Mon Sep 17 00:00:00 2001
From: Sami Vaarala <sami.vaarala@iki.fi>
Date: Sat, 17 Dec 2016 22:25:46 +0200
Subject: [PATCH 2/4] Genbuiltins fixes for property attributes

---
 tools/genbuiltins.py | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/tools/genbuiltins.py b/tools/genbuiltins.py
index 7d477233..88d6e845 100644
--- a/tools/genbuiltins.py
+++ b/tools/genbuiltins.py
@@ -360,7 +360,7 @@ def metadata_prepare_objects_bidx(meta):
         else:
             meta['objects'].append(obj)
 
-# Normalize metadata property shorthand.  For example, if a proprety value
+# Normalize metadata property shorthand.  For example, if a property value
 # is a shorthand function, create a function object and change the property
 # to point to that function object.
 def metadata_normalize_shorthand(meta):
@@ -614,7 +614,7 @@ def metadata_normalize_ram_function_names(meta):
         if name_prop is None:
             num_added += 1
             logger.debug('Adding missing "name" property for function %s' % o['id'])
-            o['properties'].append({ 'key': 'name', 'value': '', 'attributes': '' })
+            o['properties'].append({ 'key': 'name', 'value': '', 'attributes': 'c' })
 
     if num_added > 0:
         logger.debug('Added missing "name" property for %d functions' % num_added)
@@ -1340,8 +1340,8 @@ def steal_prop(props, key):
 # XXX: Reserved word stridxs could be made to match token numbers
 #      directly so that a duk_stridx2token[] would not be needed.
 
-# Default property attributes, see E5 Section 15 beginning.
-LENGTH_PROPERTY_ATTRIBUTES = ''
+# Default property attributes.
+LENGTH_PROPERTY_ATTRIBUTES = 'c'
 ACCESSOR_PROPERTY_ATTRIBUTES = 'c'
 DEFAULT_DATA_PROPERTY_ATTRIBUTES = 'wc'
 
@@ -1739,9 +1739,7 @@ def gen_ramobj_initdata_for_props(meta, be, bi, string_to_stridx, natfunc_name_t
         prop_name = steal_prop(props, 'name')
         assert(prop_name is not None)
         assert(isinstance(prop_name['value'], str))
-        # Function.prototype.name has special handling in duk_hthread_builtins.c
-        assert((bi['id'] != 'bi_function_prototype' and prop_name['attributes'] == '') or \
-               (bi['id'] == 'bi_function_prototype' and prop_name['attributes'] == 'w'))
+        assert(prop_name['attributes'] == 'c')
 
     # length: encoded specially, so steal and ignore
     prop_proto = steal_prop(props, 'length')

From ba57c486b417ea2e49b0d91d540ad17e9efade23 Mon Sep 17 00:00:00 2001
From: Sami Vaarala <sami.vaarala@iki.fi>
Date: Sat, 17 Dec 2016 23:41:16 +0200
Subject: [PATCH 3/4] Testcase for %TypedArray%

---
 ...t-bi-typedarray-constructor-inheritance.js | 60 +++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 tests/ecmascript/test-bi-typedarray-constructor-inheritance.js

diff --git a/tests/ecmascript/test-bi-typedarray-constructor-inheritance.js b/tests/ecmascript/test-bi-typedarray-constructor-inheritance.js
new file mode 100644
index 00000000..9d526378
--- /dev/null
+++ b/tests/ecmascript/test-bi-typedarray-constructor-inheritance.js
@@ -0,0 +1,60 @@
+/*
+ *  Typed array constructors inherit from %TypedArray% in ES6.
+ */
+
+/*===
+Int8Array false true
+Uint8Array false true
+Uint8ClampedArray false true
+Int16Array false true
+Uint16Array false true
+Int32Array false true
+Uint32Array false true
+Float32Array false true
+Float64Array false true
+TypeError
+TypeError
+object true false false false
+string TypedArray false false true
+number 0 false false true
+===*/
+
+function test() {
+    [ Int8Array, Uint8Array, Uint8ClampedArray,
+      Int16Array, Uint16Array, Int32Array, Uint32Array,
+      Float32Array, Float64Array ].forEach(function (fn) {
+        print(fn.name, Object.getPrototypeOf(fn) === Function.prototype, Object.getPrototypeOf(fn) === Object.getPrototypeOf(Int8Array));
+    });
+
+    // The %TypedArray% rejects normal and constructor calls.
+    var TA = Object.getPrototypeOf(Int8Array);
+    try {
+        TA();
+    } catch (e) {
+        print(e.name);
+    }
+    try {
+        new TA();
+    } catch (e) {
+        print(e.name);
+    }
+
+    // %TypedArray%.prototype is %TypedArrayPrototype%.
+    var TAP = Object.getPrototypeOf(Object.getPrototypeOf(new Uint8Array(1)));
+    pd = Object.getOwnPropertyDescriptor(TA, 'prototype');
+    print(typeof pd.value, pd.value === TAP, pd.writable, pd.enumerable, pd.configurable);
+
+    // .name
+    pd = Object.getOwnPropertyDescriptor(TA, 'name');
+    print(typeof pd.value, pd.value, pd.writable, pd.enumerable, pd.configurable);
+
+    // .length
+    pd = Object.getOwnPropertyDescriptor(TA, 'length');
+    print(typeof pd.value, pd.value, pd.writable, pd.enumerable, pd.configurable);
+}
+
+try {
+    test();
+} catch (e) {
+    print(e.stack || e);
+}

From 273557edb9a3cf9b8afe09b2621af8da1eb64030 Mon Sep 17 00:00:00 2001
From: Sami Vaarala <sami.vaarala@iki.fi>
Date: Sat, 17 Dec 2016 22:44:02 +0200
Subject: [PATCH 4/4] Releases: %TypedArray% inheritance

---
 RELEASES.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/RELEASES.rst b/RELEASES.rst
index 2167906e..f3a10803 100644
--- a/RELEASES.rst
+++ b/RELEASES.rst
@@ -2115,6 +2115,9 @@ Planned
 * Allow duplicate property names in object literals as required by ES6
   (GH-1190)
 
+* Change typed array constructor chain to match ES6, e.g. Uint8Array
+  constructor inherits from intrinsic %TypedArray% constructor (GH-1191)
+
 * Add a fastint check for duk_put_number_list() values (GH-1086)
 
 * Remove an unintended fastint downgrade check for unary minus executor