Class YieldSEXP

Remarks

Implements yield semantics. Yield can pass arguments which can be read as iterator/next values from the iterator function. When the flow resumes, the yieldDoneIndicator value is check to perform an early return otherwise the flow of the generator function continues until next pause.

MDN reference

function* foo() {
   yield "The";
   yield "World is";
}

const iterator = foo();
console.log(iterator.next().value + " " + iterator.next().value + " " + iterator.next().value);
Copy

<yieldDoneIndicator, yieldReturnResultHolder> = YIELD obj
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Structure

• ARG(obj): An object, likely a promise returned by an asynchronous function.

• ARG(doneTarget): The target location for yieldDoneIndicator (usually ResolveEnvBindingSEXP before transition).

• ARG(nextValue): The target location for yieldReturnResultHolder (usually ResolveEnvBindingSEXP before transition).