RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-05-31 07:58:11 +00:00
Code Issues Activity Actions

LibJS/Bytecode: Move Append impl to CommonImplementations

Browse source
This commit is contained in:
Simon Wanner 2023-10-29 17:20:51 +01:00 • committed by Andreas Kling
parent 3dc5c8d28e
commit 516bb01082
3 changed files with 59 additions and 57 deletions
Download patch file Download diff file Expand all files Collapse all files

58
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
View file

@ -577,63 +577,7 @@ ThrowCompletionOr<void> NewArray::execute_impl(Bytecode::Interpreter& interprete
ThrowCompletionOr<void> Append::execute_impl(Bytecode::Interpreter& interpreter) const
{
// Note: This OpCode is used to construct array literals and argument arrays for calls,
// containing at least one spread element,
// Iterating over such a spread element to unpack it has to be visible by
// the user courtesy of
// (1) https://tc39.es/ecma262/#sec-runtime-semantics-arrayaccumulation
// SpreadElement : ... AssignmentExpression
// 1. Let spreadRef be ? Evaluation of AssignmentExpression.
// 2. Let spreadObj be ? GetValue(spreadRef).
// 3. Let iteratorRecord be ? GetIterator(spreadObj).
// 4. Repeat,
// a. Let next be ? IteratorStep(iteratorRecord).
// b. If next is false, return nextIndex.
// c. Let nextValue be ? IteratorValue(next).
// d. Perform ! CreateDataPropertyOrThrow(array, ! ToString(𝔽(nextIndex)), nextValue).
// e. Set nextIndex to nextIndex + 1.
// (2) https://tc39.es/ecma262/#sec-runtime-semantics-argumentlistevaluation
// ArgumentList : ... AssignmentExpression
// 1. Let list be a new empty List.
// 2. Let spreadRef be ? Evaluation of AssignmentExpression.
// 3. Let spreadObj be ? GetValue(spreadRef).
// 4. Let iteratorRecord be ? GetIterator(spreadObj).
// 5. Repeat,
// a. Let next be ? IteratorStep(iteratorRecord).
// b. If next is false, return list.
// c. Let nextArg be ? IteratorValue(next).
// d. Append nextArg to list.
// ArgumentList : ArgumentList , ... AssignmentExpression
// 1. Let precedingArgs be ? ArgumentListEvaluation of ArgumentList.
// 2. Let spreadRef be ? Evaluation of AssignmentExpression.
// 3. Let iteratorRecord be ? GetIterator(? GetValue(spreadRef)).
// 4. Repeat,
// a. Let next be ? IteratorStep(iteratorRecord).
// b. If next is false, return precedingArgs.
// c. Let nextArg be ? IteratorValue(next).
// d. Append nextArg to precedingArgs.
auto& vm = interpreter.vm();
// Note: We know from codegen, that lhs is a plain array with only indexed properties
auto& lhs = interpreter.reg(m_lhs).as_array();
auto lhs_size = lhs.indexed_properties().array_like_size();
auto rhs = interpreter.accumulator();
if (m_is_spread) {
// ...rhs
size_t i = lhs_size;
TRY(get_iterator_values(vm, rhs, [&i, &lhs](Value iterator_value) -> Optional<Completion> {
lhs.indexed_properties().put(i, iterator_value, default_attributes);
++i;
return {};
}));
} else {
lhs.indexed_properties().put(lhs_size, rhs, default_attributes);
}
return {};
return append(interpreter.vm(), interpreter.reg(m_lhs), interpreter.accumulator(), m_is_spread);
}
ThrowCompletionOr<void> ImportCall::execute_impl(Bytecode::Interpreter& interpreter) const