using x = y
switch (foo) {
case 0: using c = d
default: using e = f
}
switch (foo) {
case 0: await using c = d
default: using e = f
}
async function foo() {
using x = y
switch (foo) {
case 0: using c = d
default: using e = f
}
switch (foo) {
case 0: await using c = d
default: using e = f
}
}