Spec allows function literals in initializer list #11509
Description
Example code:
class C {
final int x;
C() : x = (){ return 42; }();
}
main() {
print(new C().x);
}
This errs with the message:
'file:..../initcall.dart': Error: line 3 pos 13: unexpected token ')'
C() : x = (){ return 42; }();
The grammar allows the syntax.