| // RUN: %target-swift-frontend %s -O -emit-sil | %FileCheck %s |
| |
| func curry<T1, T2, T3, T4>(_ f: @escaping (T1, T2, T3) -> T4) -> (T1) -> (T2) -> (T3) -> T4 { |
| return { x in { y in { z in f(x, y, z) } } } |
| } |
| |
| public protocol P { |
| func val() -> Int32 |
| } |
| |
| struct CP: P { |
| let v: Int32 |
| |
| func val() -> Int32 { |
| return v |
| } |
| |
| init(_ v: Int32) { |
| self.v = v |
| } |
| } |
| |
| func compose(_ x: P, _ y: P, _ z: P) -> Int32 { |
| return x.val() + y.val() + z.val() |
| } |
| |
| //CHECK-LABEL: sil [noinline] @$s12sil_combine120test_compose_closures5Int32VyF : $@convention(thin) () -> Int32 { |
| //CHECK: [[OEADDR:%.*]] = open_existential_addr immutable_access {{%.*}} : $*P to $*@opened |
| //CHECK: [[ADDRCAST:%.*]] = unchecked_addr_cast [[OEADDR]] : $*@opened |
| //CHECK: struct_element_addr [[ADDRCAST]] : $*CP, #CP.v |
| @inline(never) |
| public func test_compose_closure() -> Int32 { |
| let insult = curry(compose)(CP(1))(CP(2)) |
| let gs = insult(CP(3)) |
| return gs |
| } |
| |
