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refactor(transformer): exponentiation transform: reduce identifier cloning #6297

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graphite-app merged 1 commit into from
Oct 5, 2024
Merged

refactor(transformer): exponentiation transform: reduce identifier cloning #6297

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22 changes: 13 additions & 9 deletions crates/oxc_transformer/src/es2016/exponentiation_operator.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -208,22 +208,26 @@ impl<'a, 'ctx> ExponentiationOperator<'a, 'ctx> {
) -> Option<Expression<'a>> {
let reference = match node {
SimpleAssignmentTarget::AssignmentTargetIdentifier(ident) => {
if ident
.reference_id
.get()
.is_some_and(|reference_id| ctx.symbols().has_binding(reference_id))
{
let reference = ctx.symbols().get_reference(ident.reference_id().unwrap());
if let Some(symbol_id) = reference.symbol_id() {
// this variable is declared in scope so we can be 100% sure
// that evaluating it multiple times won't trigger a getter
// or something else
return Some(ctx.ast.expression_from_identifier_reference(
ctx.clone_identifier_reference(ident, ReferenceFlags::Write),
ctx.create_bound_reference_id(
SPAN,
ident.name.clone(),
symbol_id,
ReferenceFlags::Write,
),
));
}
// could possibly trigger a getter so we need to only evaluate it once
ctx.ast.expression_from_identifier_reference(
ctx.clone_identifier_reference(ident, ReferenceFlags::Read),
)
ctx.ast.expression_from_identifier_reference(ctx.create_unbound_reference_id(
SPAN,
ident.name.clone(),
ReferenceFlags::Read,
))
}
match_member_expression!(SimpleAssignmentTarget) => {
let expr = match node {
Expand Down