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

base class A1 {
  var a: i32;
}

base class A2 {
  var a: i32;
}

class B2 {
  extend base: A2;
  var b: i32;
}

// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+4]]:38: ERROR: Cannot implicitly convert from `B2*` to `A1*`.
// CHECK:STDERR: fn ConvertUnrelated(p: B2*) -> A1* { return p; }
// CHECK:STDERR:                                      ^~~~~~~~~
// CHECK:STDERR:
fn ConvertUnrelated(p: B2*) -> A1* { return p; }

class Incomplete;

// CHECK:STDERR: fail_derived_to_base.carbon:[[@LINE+3]]:47: ERROR: Cannot implicitly convert from `Incomplete*` to `A2*`.
// CHECK:STDERR: fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }
// CHECK:STDERR:                                               ^~~~~~~~~
fn ConvertIncomplete(p: Incomplete*) -> A2* { return p; }

// CHECK:STDOUT: --- fail_derived_to_base.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %A1: type = class_type @A1 [template]
// CHECK:STDOUT:   %Int32.type: type = fn_type @Int32 [template]
// CHECK:STDOUT:   %.1: type = tuple_type () [template]
// CHECK:STDOUT:   %Int32: %Int32.type = struct_value () [template]
// CHECK:STDOUT:   %.2: type = unbound_element_type %A1, i32 [template]
// CHECK:STDOUT:   %.3: type = struct_type {.a: i32} [template]
// CHECK:STDOUT:   %A2: type = class_type @A2 [template]
// CHECK:STDOUT:   %.4: type = unbound_element_type %A2, i32 [template]
// CHECK:STDOUT:   %B2: type = class_type @B2 [template]
// CHECK:STDOUT:   %.5: type = ptr_type %.3 [template]
// CHECK:STDOUT:   %.6: type = unbound_element_type %B2, %A2 [template]
// CHECK:STDOUT:   %.7: type = unbound_element_type %B2, i32 [template]
// CHECK:STDOUT:   %.8: type = struct_type {.base: %A2, .b: i32} [template]
// CHECK:STDOUT:   %.9: type = ptr_type %B2 [template]
// CHECK:STDOUT:   %.10: type = ptr_type %A1 [template]
// CHECK:STDOUT:   %ConvertUnrelated.type: type = fn_type @ConvertUnrelated [template]
// CHECK:STDOUT:   %ConvertUnrelated: %ConvertUnrelated.type = struct_value () [template]
// CHECK:STDOUT:   %.11: type = struct_type {.base: %.5, .b: i32} [template]
// CHECK:STDOUT:   %.12: type = ptr_type %.11 [template]
// CHECK:STDOUT:   %.13: type = ptr_type %.8 [template]
// CHECK:STDOUT:   %Incomplete: type = class_type @Incomplete [template]
// CHECK:STDOUT:   %.14: type = ptr_type %Incomplete [template]
// CHECK:STDOUT:   %.15: type = ptr_type %A2 [template]
// CHECK:STDOUT:   %ConvertIncomplete.type: type = fn_type @ConvertIncomplete [template]
// CHECK:STDOUT:   %ConvertIncomplete: %ConvertIncomplete.type = struct_value () [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = %Core
// CHECK:STDOUT:     .A1 = %A1.decl
// CHECK:STDOUT:     .A2 = %A2.decl
// CHECK:STDOUT:     .B2 = %B2.decl
// CHECK:STDOUT:     .ConvertUnrelated = %ConvertUnrelated.decl
// CHECK:STDOUT:     .Incomplete = %Incomplete.decl
// CHECK:STDOUT:     .ConvertIncomplete = %ConvertIncomplete.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core: <namespace> = namespace [template] {}
// CHECK:STDOUT:   %A1.decl: type = class_decl @A1 [template = constants.%A1] {}
// CHECK:STDOUT:   %import_ref.1: %Int32.type = import_ref ir3, inst+3, loaded [template = constants.%Int32]
// CHECK:STDOUT:   %A2.decl: type = class_decl @A2 [template = constants.%A2] {}
// CHECK:STDOUT:   %import_ref.2: %Int32.type = import_ref ir3, inst+3, loaded [template = constants.%Int32]
// CHECK:STDOUT:   %B2.decl: type = class_decl @B2 [template = constants.%B2] {}
// CHECK:STDOUT:   %import_ref.3: %Int32.type = import_ref ir3, inst+3, loaded [template = constants.%Int32]
// CHECK:STDOUT:   %ConvertUnrelated.decl: %ConvertUnrelated.type = fn_decl @ConvertUnrelated [template = constants.%ConvertUnrelated] {
// CHECK:STDOUT:     %B2.ref: type = name_ref B2, %B2.decl [template = constants.%B2]
// CHECK:STDOUT:     %.loc28_26: type = ptr_type %B2 [template = constants.%.9]
// CHECK:STDOUT:     %p.loc28_21.1: %.9 = param p
// CHECK:STDOUT:     @ConvertUnrelated.%p: %.9 = bind_name p, %p.loc28_21.1
// CHECK:STDOUT:     %A1.ref: type = name_ref A1, %A1.decl [template = constants.%A1]
// CHECK:STDOUT:     %.loc28_34: type = ptr_type %A1 [template = constants.%.10]
// CHECK:STDOUT:     @ConvertUnrelated.%return: ref %.10 = var <return slot>
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Incomplete.decl: type = class_decl @Incomplete [template = constants.%Incomplete] {}
// CHECK:STDOUT:   %ConvertIncomplete.decl: %ConvertIncomplete.type = fn_decl @ConvertIncomplete [template = constants.%ConvertIncomplete] {
// CHECK:STDOUT:     %Incomplete.ref: type = name_ref Incomplete, %Incomplete.decl [template = constants.%Incomplete]
// CHECK:STDOUT:     %.loc35_35: type = ptr_type %Incomplete [template = constants.%.14]
// CHECK:STDOUT:     %p.loc35_22.1: %.14 = param p
// CHECK:STDOUT:     @ConvertIncomplete.%p: %.14 = bind_name p, %p.loc35_22.1
// CHECK:STDOUT:     %A2.ref: type = name_ref A2, %A2.decl [template = constants.%A2]
// CHECK:STDOUT:     %.loc35_43: type = ptr_type %A2 [template = constants.%.15]
// CHECK:STDOUT:     @ConvertIncomplete.%return: ref %.15 = var <return slot>
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @A1 {
// CHECK:STDOUT:   %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT:   %.loc12_10.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT:   %.loc12_10.2: type = converted %int.make_type_32, %.loc12_10.1 [template = i32]
// CHECK:STDOUT:   %.loc12_8: %.2 = field_decl a, element0 [template]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%A1
// CHECK:STDOUT:   .a = %.loc12_8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @A2 {
// CHECK:STDOUT:   %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT:   %.loc16_10.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT:   %.loc16_10.2: type = converted %int.make_type_32, %.loc16_10.1 [template = i32]
// CHECK:STDOUT:   %.loc16_8: %.4 = field_decl a, element0 [template]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%A2
// CHECK:STDOUT:   .a = %.loc16_8
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @B2 {
// CHECK:STDOUT:   %A2.ref: type = name_ref A2, file.%A2.decl [template = constants.%A2]
// CHECK:STDOUT:   %.loc20: %.6 = base_decl %A2, element0 [template]
// CHECK:STDOUT:   %int.make_type_32: init type = call constants.%Int32() [template = i32]
// CHECK:STDOUT:   %.loc21_10.1: type = value_of_initializer %int.make_type_32 [template = i32]
// CHECK:STDOUT:   %.loc21_10.2: type = converted %int.make_type_32, %.loc21_10.1 [template = i32]
// CHECK:STDOUT:   %.loc21_8: %.7 = field_decl b, element1 [template]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = constants.%B2
// CHECK:STDOUT:   .base = %.loc20
// CHECK:STDOUT:   .b = %.loc21_8
// CHECK:STDOUT:   extend name_scope3
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Incomplete;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Int32() -> type = "int.make_type_32";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @ConvertUnrelated(%p: %.9) -> %.10 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %p.ref: %.9 = name_ref p, %p
// CHECK:STDOUT:   return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @ConvertIncomplete(%p: %.14) -> %.15 {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT:   %p.ref: %.14 = name_ref p, %p
// CHECK:STDOUT:   return <error>
// CHECK:STDOUT: }
// CHECK:STDOUT: