| |
| // RUN: %target-swift-frontend -emit-silgen -enable-sil-ownership %s | %FileCheck %s |
| |
| func takesOptionalFunction(_: (() -> ())?) {} |
| |
| struct CustomNull : ExpressibleByNilLiteral { |
| init(nilLiteral: ()) {} |
| } |
| |
| func takesANull(_: CustomNull) {} |
| |
| // CHECK-LABEL: sil hidden @$S11nil_literal4testyyF : $@convention(thin) () -> () |
| func test() { |
| // CHECK: [[NIL:%.*]] = enum $Optional<@callee_guaranteed () -> ()>, #Optional.none!enumelt |
| // CHECK: [[FN:%.*]] = function_ref @$S11nil_literal21takesOptionalFunctionyyyycSgF |
| // CHECK: apply [[FN]]([[NIL]]) |
| _ = takesOptionalFunction(nil) |
| |
| // CHECK: [[METATYPE:%.*]] = metatype $@thin CustomNull.Type |
| // CHECK: [[NIL_FN:%.*]] = function_ref @$S11nil_literal10CustomNullV0A7LiteralACyt_tcfC |
| // CHECK: [[NIL:%.*]] = apply [[NIL_FN]]([[METATYPE]]) |
| // CHECK: [[FN:%.*]] = function_ref @$S11nil_literal10takesANullyyAA10CustomNullVF |
| // CHECK: apply [[FN]]([[NIL]]) |
| _ = takesANull(nil) |
| } |
