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Normative: add Object.fromEntries #1274

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Feb 20, 2019
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Normative: add Object.fromEntries #1274

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28 changes: 28 additions & 0 deletions spec.html
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Original file line number Diff line number Diff line change
Expand Up @@ -24101,6 +24101,34 @@ <h1>Object.defineProperty ( _O_, _P_, _Attributes_ )</h1>
</emu-alg>
</emu-clause>

<emu-clause id="sec-object.fromentries">
<h1>Object.fromEntries ( iterable )</h1>
<p>When the `fromEntries` method is called with argument _iterable_, the following steps are taken:</p>
<emu-alg>
1. Perform ? RequireObjectCoercible(_iterable_).
1. Let _obj_ be ObjectCreate(%ObjectPrototype%).
1. Assert: _obj_ is an extensible ordinary object with no own properties.
1. Let _stepsDefine_ be the algorithm steps defined in <emu-xref href="#sec-create-data-property-on-object-functions">CreateDataPropertyOnObject Functions</emu-xref>.
1. Let _adder_ be CreateBuiltinFunction(_stepsDefine_, &laquo; &raquo;).
1. Return ? AddEntriesFromIterable(_obj_, _iterable_, _adder_).
</emu-alg>
<emu-note>
The function created for _adder_ is never directly accessible to ECMAScript code.
</emu-note>

<emu-clause id="sec-create-data-property-on-object-functions">
<h1>CreateDataPropertyOnObject Functions</h1>
<p>A CreateDataPropertyOnObject function is an anonymous built-in function. When a CreateDataPropertyOnObject function is called with arguments _key_ and _value_, the following steps are taken:</p>
<emu-alg>
1. Let _O_ be the *this* value.
1. Assert: Type(_O_) is Object.
1. Assert: _O_ is an extensible ordinary object.
1. Let _propertyKey_ be ? ToPropertyKey(_key_).
1. Perform ! CreateDataPropertyOrThrow(_O_, _propertyKey_, _value_).
<emu-alg>
</emu-clause>
</emu-clause>

<emu-clause id="sec-object.entries">
<h1>Object.entries ( _O_ )</h1>
<p>When the `entries` function is called with argument _O_, the following steps are taken:</p>
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