exit status: 1 with stderr:
<stdin>:20:8: error: type 'FooImpl1' does not conform to protocol 'Foo' struct FooImpl1: Foo { ^ <stdin>:5:10: note: multiple matching functions named 'hoge()' with type '() -> ()' func hoge() ^ <stdin>:9:10: note: candidate exactly matches func hoge() { ^ <stdin>:15:10: note: candidate exactly matches func hoge() { ^ <stdin>:24:8: error: type 'FooImpl2' does not conform to protocol 'Foo' struct FooImpl2: Foo { ^ <stdin>:5:10: note: multiple matching functions named 'hoge()' with type '() -> ()' func hoge() ^ <stdin>:9:10: note: candidate exactly matches func hoge() { ^ <stdin>:15:10: note: candidate exactly matches func hoge() { ^ <stdin>:31:1: error: ambiguous use of 'hoge()' foo1.hoge() ^ <stdin>:9:10: note: found this candidate func hoge() { ^ <stdin>:15:10: note: found this candidate func hoge() { ^ <stdin>:32:1: error: ambiguous use of 'hoge()' foo2.hoge() ^ <stdin>:9:10: note: found this candidate func hoge() { ^ <stdin>:15:10: note: found this candidate func hoge() { ^