carbon-lang/toolchain/check/testdata/impl/fail_extend_partially_defined_interface.carbon

// 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

interface I {
  class C {
    // CHECK:STDERR: fail_extend_partially_defined_interface.carbon:[[@LINE+6]]:5: ERROR: `extend impl` requires a definition for interface `I`.
    // CHECK:STDERR:     extend impl as I;
    // CHECK:STDERR:     ^~~~~~~~~~~~~~~~~
    // CHECK:STDERR: fail_extend_partially_defined_interface.carbon:[[@LINE-5]]:1: Interface is currently being defined.
    // CHECK:STDERR: interface I {
    // CHECK:STDERR: ^~~~~~~~~~~~~
    extend impl as I;
  }
}

// CHECK:STDOUT: --- fail_extend_partially_defined_interface.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %.1: type = interface_type @I [template]
// CHECK:STDOUT:   %C: type = class_type @C [template]
// CHECK:STDOUT:   %.2: type = struct_type {} [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace {.I = %I.decl} [template]
// CHECK:STDOUT:   %I.decl = interface_decl @I, () [template = constants.%.1]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @I {
// CHECK:STDOUT:   %C.decl = class_decl @C, () [template = constants.%C]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .C = %C.decl
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @impl: C as I;
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   impl_decl @impl, (<unexpected instref inst+5>)
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   has_error
// CHECK:STDOUT: }
// CHECK:STDOUT: