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fix(es/compat): Handle a nullish coalescing in a switch case (#6363)

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Austaras 2022-11-06 02:31:02 +08:00 committed by GitHub
parent 0f09f82db3
commit 2de45fb0f7
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2 changed files with 14 additions and 1 deletions
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4
crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/mod.rs
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@ -74,8 +74,10 @@ impl VisitMut for NullishCoalescing {
/// Prevents #1123
fn visit_mut_switch_case(&mut self, s: &mut SwitchCase) {
// Prevents #6328
s.test.visit_mut_with(self);
let old_vars = self.vars.take();
s.visit_mut_children_with(self);
s.cons.visit_mut_with(self);
self.vars = old_vars;
}

11
crates/swc_ecma_transforms_compat/src/es2020/nullish_coalescing/tests.rs
View File

@ -166,3 +166,14 @@ function foo(opts) {
}
"#
);
test!(
syntax(),
|_| tr(Default::default()),
issue_6328,
"switch ( 0 ) { case 0 ?? 0 : }",
r#"
var ref;
switch ( 0 ) { case (ref = 0) !== null && ref !== void 0 ? ref : 0: }
"#
);