// 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/no_prelude/fail_alias.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/no_prelude/fail_alias.carbon

interface I {}
class C {}

alias AI = I;
alias AC = C;

impl AC as AI {}

// CHECK:STDERR: fail_alias.carbon:[[@LINE+7]]:1: error: redefinition of `impl AC as AI` [ImplRedefinition]
// CHECK:STDERR: impl AC as AI {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR: fail_alias.carbon:[[@LINE-5]]:1: note: previous definition was here [ImplPreviousDefinition]
// CHECK:STDERR: impl AC as AI {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR:
impl AC as AI {}

// CHECK:STDOUT: --- fail_alias.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %I.type: type = facet_type <@I> [template]
// CHECK:STDOUT:   %Self: %I.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT:   %C: type = class_type @C [template]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
// CHECK:STDOUT:   %impl_witness: <witness> = impl_witness () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .I = %I.decl
// CHECK:STDOUT:     .C = %C.decl
// CHECK:STDOUT:     .AI = %AI
// CHECK:STDOUT:     .AC = %AC
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %I.decl: type = interface_decl @I [template = constants.%I.type] {} {}
// CHECK:STDOUT:   %C.decl: type = class_decl @C [template = constants.%C] {} {}
// CHECK:STDOUT:   %I.ref: type = name_ref I, %I.decl [template = constants.%I.type]
// CHECK:STDOUT:   %AI: type = bind_alias AI, %I.decl [template = constants.%I.type]
// CHECK:STDOUT:   %C.ref: type = name_ref C, %C.decl [template = constants.%C]
// CHECK:STDOUT:   %AC: type = bind_alias AC, %C.decl [template = constants.%C]
// CHECK:STDOUT:   impl_decl @impl.1 [template] {} {
// CHECK:STDOUT:     %AC.ref: type = name_ref AC, file.%AC [template = constants.%C]
// CHECK:STDOUT:     %AI.ref: type = name_ref AI, file.%AI [template = constants.%I.type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %impl_witness.loc17: <witness> = impl_witness () [template = constants.%impl_witness]
// CHECK:STDOUT:   impl_decl @impl.2 [template] {} {
// CHECK:STDOUT:     %AC.ref: type = name_ref AC, file.%AC [template = constants.%C]
// CHECK:STDOUT:     %AI.ref: type = name_ref AI, file.%AI [template = constants.%I.type]
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %impl_witness.loc26: <witness> = impl_witness () [template = constants.%impl_witness]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT:   %Self: %I.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = %Self
// CHECK:STDOUT:   witness = ()
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl.1: %AC.ref as %AI.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   witness = file.%impl_witness.loc17
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl.2: %AC.ref as %AI.ref {
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   witness = file.%impl_witness.loc26
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template = constants.%complete_type]
// CHECK:STDOUT:   complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT: