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Editorial: Factor out AO RunCallerContext() #3846

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Editorial: Factor out AO RunCallerContext() #3846

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0c4add2
Factor out RunCallerContext
jmdyck Feb 15, 2022
e008601
fixup: wording around `Resume`
jmdyck Nov 9, 2022
77fc859
fixup: insert comma
jmdyck May 7, 2026
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37 changes: 25 additions & 12 deletions spec.html
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Original file line number Diff line number Diff line change
Expand Up @@ -11994,6 +11994,28 @@ <h1>
1. Return Completion(_result_).
</emu-alg>
</emu-clause>

<emu-clause id="sec-runcallercontext" type="abstract operation">
<h1>
RunCallerContext (
_value_: an ECMAScript language value or ~empty~,
): a Completion Record
</h1>
<dl class="header">
<dt>description</dt>
<dd>It resumes the caller context (sending it _value_ as the resumption value), and waits for the result, if any.</dd>
</dl>
<emu-alg>
1. Let _genContext_ be the running execution context.
1. Remove _genContext_ from the execution context stack and restore the execution context that is at the top of the execution context stack as the running execution context.
1. Let _callerContext_ be the running execution context.
1. Resume _callerContext_, passing NormalCompletion(_value_).

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Newly Introduced Unknown Step 

This step in RunCallerContext cannot be understood by ESMeta. Type check for this algorithm will not be performed after this line.
1. NOTE: The above step transfers control to _callerContext_ and pauses. The only way for it to un-pause and have control proceed to the subsequent steps in this algorithm is for _genContext_ to be resumed again, which might never happen.
1. Assert: _genContext_ is the running execution context.
1. Let _result_ be the Completion Record with which _genContext_ was just resumed.

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1. Return Completion(_result_).
</emu-alg>
</emu-clause>
</emu-clause>

<emu-clause id="sec-jobs" oldids="sec-jobs-and-job-queues,sec-enqueuejob,sec-runjobs,job-queue">
Expand Down Expand Up @@ -50684,10 +50706,7 @@ <h1>
1. Let _generator_ be the value of the Generator component of _genContext_.
1. Assert: GetGeneratorKind() is ~sync~.
1. Set _generator_.[[GeneratorState]] to ~suspended-yield~.
1. Remove _genContext_ from the execution context stack and restore the execution context that is at the top of the execution context stack as the running execution context.
1. Let _callerContext_ be the running execution context.
1. Resume _callerContext_ passing NormalCompletion(_iteratorResult_). If _genContext_ is ever resumed again, let _resumptionValue_ be the Completion Record with which it is resumed.
1. Assert: If control reaches here, then _genContext_ is the running execution context again.
1. Let _resumptionValue_ be Completion(RunCallerContext(_iteratorResult_)).
1. Return _resumptionValue_.
</emu-alg>
</emu-clause>
Expand Down Expand Up @@ -51067,10 +51086,7 @@ <h1>
1. Let _resumptionValue_ be Completion(_toYield_.[[Completion]]).
1. Return ? AsyncGeneratorUnwrapYieldResumption(_resumptionValue_).
1. Set _generator_.[[AsyncGeneratorState]] to ~suspended-yield~.
1. Remove _genContext_ from the execution context stack and restore the execution context that is at the top of the execution context stack as the running execution context.
1. Let _callerContext_ be the running execution context.
1. Resume _callerContext_ passing *undefined*. If _genContext_ is ever resumed again, let _resumptionValue_ be the Completion Record with which it is resumed.
1. Assert: If control reaches here, then _genContext_ is the running execution context again.
1. Let _resumptionValue_ be Completion(RunCallerContext(*undefined*)).
1. Return ? AsyncGeneratorUnwrapYieldResumption(_resumptionValue_).
</emu-alg>
</emu-clause>
Expand Down Expand Up @@ -51318,10 +51334,7 @@ <h1>
1. Return NormalCompletion(*undefined*).
1. Let _onRejected_ be CreateBuiltinFunction(_rejectedClosure_, 1, *""*, « »).
1. Perform PerformPromiseThen(_promise_, _onFulfilled_, _onRejected_).
1. Remove _asyncContext_ from the execution context stack and restore the execution context that is at the top of the execution context stack as the running execution context.
1. Let _callerContext_ be the running execution context.
1. Resume _callerContext_ passing ~empty~. If _asyncContext_ is ever resumed again, let _completion_ be the Completion Record with which it is resumed.
1. Assert: If control reaches here, then _asyncContext_ is the running execution context again.
1. Let _completion_ be Completion(RunCallerContext(~empty~)).
1. Return _completion_.
</emu-alg>
</emu-clause>
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