// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
// Exceptions. See /LICENSE for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/impl/extend_impl.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/extend_impl.carbon

interface HasF {
  fn F();
}

class C {
  extend impl as HasF {
    fn F() {}
  }
}

fn G(c: C) {
  C.F();
  c.F();
}

// CHECK:STDOUT: --- extend_impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %HasF.type: type = facet_type <@HasF> [concrete]
// CHECK:STDOUT:   %Self: %HasF.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT:   %F.type.b7b: type = fn_type @F.1 [concrete]
// CHECK:STDOUT:   %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT:   %F.f50: %F.type.b7b = struct_value () [concrete]
// CHECK:STDOUT:   %HasF.assoc_type: type = assoc_entity_type @HasF [concrete]
// CHECK:STDOUT:   %assoc0: %HasF.assoc_type = assoc_entity element0, @HasF.%F.decl [concrete]
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %impl_witness: <witness> = impl_witness (@impl.%F.decl) [concrete]
// CHECK:STDOUT:   %F.type.a65: type = fn_type @F.2 [concrete]
// CHECK:STDOUT:   %F.ad8: %F.type.a65 = struct_value () [concrete]
// CHECK:STDOUT:   %HasF.facet: %HasF.type = facet_value %C, (%impl_witness) [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT:   %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT:   %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT:   %.1bc: type = fn_type_with_self_type %F.type.b7b, %HasF.facet [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .HasF = %HasF.decl
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .G = %G.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %HasF.decl: type = interface_decl @HasF [concrete = constants.%HasF.type] {} {}
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT:   %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT:     %c.patt: %C = binding_pattern c
// CHECK:STDOUT:     %c.param_patt: %C = value_param_pattern %c.patt, call_param0
// CHECK:STDOUT:   } {
// CHECK:STDOUT:     %c.param: %C = value_param call_param0
// CHECK:STDOUT:     %C.ref.loc21: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:     %c: %C = bind_name c, %c.param
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @HasF {
// CHECK:STDOUT:   %Self: %HasF.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:   %F.decl: %F.type.b7b = fn_decl @F.1 [concrete = constants.%F.f50] {} {}
// CHECK:STDOUT:   %assoc0: %HasF.assoc_type = assoc_entity element0, %F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = %Self
// CHECK:STDOUT:   .F = %assoc0
// CHECK:STDOUT:   witness = (%F.decl)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: %Self.ref as %HasF.ref {
// CHECK:STDOUT:   %F.decl: %F.type.a65 = fn_decl @F.2 [concrete = constants.%F.ad8] {} {}
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .F = %F.decl
// CHECK:STDOUT:   witness = @C.%impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   impl_decl @impl [concrete] {} {
// CHECK:STDOUT:     %Self.ref: type = name_ref Self, constants.%C [concrete = constants.%C]
// CHECK:STDOUT:     %HasF.ref: type = name_ref HasF, file.%HasF.decl [concrete = constants.%HasF.type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %impl_witness: <witness> = impl_witness (@impl.%F.decl) [concrete = constants.%impl_witness]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT:   .HasF = <poisoned>
// CHECK:STDOUT:   .F = <poisoned>
// CHECK:STDOUT:   extend @impl.%HasF.ref
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @F.1(@HasF.%Self: %HasF.type) {
// CHECK:STDOUT:   fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F.2() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%c.param_patt: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %C.ref.loc22: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT:   %F.ref.loc22: %HasF.assoc_type = name_ref F, @HasF.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT:   %impl.elem0.loc22: %.1bc = impl_witness_access constants.%impl_witness, element0 [concrete = constants.%F.ad8]
// CHECK:STDOUT:   %F.call.loc22: init %empty_tuple.type = call %impl.elem0.loc22()
// CHECK:STDOUT:   %c.ref: %C = name_ref c, %c
// CHECK:STDOUT:   %F.ref.loc23: %HasF.assoc_type = name_ref F, @HasF.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT:   %impl.elem0.loc23: %.1bc = impl_witness_access constants.%impl_witness, element0 [concrete = constants.%F.ad8]
// CHECK:STDOUT:   %F.call.loc23: init %empty_tuple.type = call %impl.elem0.loc23()
// CHECK:STDOUT:   return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.1(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @F.1(constants.%HasF.facet) {}
// CHECK:STDOUT: