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

// --- a.carbon

library "[[@TEST_NAME]]";

class Empty {
}

class Incomplete;

// --- fail_b.carbon

library "[[@TEST_NAME]]";

import library "a";

// CHECK:STDERR: fail_b.carbon:[[@LINE+8]]:1: error: redeclaration of `class Empty` is redundant [RedeclRedundant]
// CHECK:STDERR: class Empty {
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR: fail_b.carbon:[[@LINE-5]]:1: in import [InImport]
// CHECK:STDERR: a.carbon:4:1: note: previously declared here [RedeclPrevDecl]
// CHECK:STDERR: class Empty {
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR:
class Empty {
}

// CHECK:STDERR: fail_b.carbon:[[@LINE+8]]:8: error: binding pattern has incomplete type `Incomplete` in name binding declaration [IncompleteTypeInBindingDecl]
// CHECK:STDERR: var a: Incomplete;
// CHECK:STDERR:        ^~~~~~~~~~
// CHECK:STDERR: fail_b.carbon:[[@LINE-16]]:1: in import [InImport]
// CHECK:STDERR: a.carbon:7:1: note: class was forward declared here [ClassForwardDeclaredHere]
// CHECK:STDERR: class Incomplete;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~
// CHECK:STDERR:
var a: Incomplete;

// CHECK:STDOUT: --- a.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %Empty: type = class_type @Empty [template]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
// CHECK:STDOUT:   %Incomplete: type = class_type @Incomplete [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .Empty = %Empty.decl
// CHECK:STDOUT:     .Incomplete = %Incomplete.decl
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %Empty.decl: type = class_decl @Empty [template = constants.%Empty] {} {}
// CHECK:STDOUT:   %Incomplete.decl: type = class_decl @Incomplete [template = constants.%Incomplete] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Empty {
// 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.%Empty
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Incomplete;
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_b.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %Empty: type = class_type @Empty [template]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [template]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [template]
// CHECK:STDOUT:   %.a95: type = class_type @.1 [template]
// CHECK:STDOUT:   %Incomplete: type = class_type @Incomplete [template]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.Empty: type = import_ref Main//a, Empty, loaded [template = constants.%Empty]
// CHECK:STDOUT:   %Main.Incomplete: type = import_ref Main//a, Incomplete, loaded [template = constants.%Incomplete]
// CHECK:STDOUT:   %Core: <namespace> = namespace file.%Core.import, [template] {
// CHECK:STDOUT:     import Core//prelude
// CHECK:STDOUT:     import Core//prelude/...
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Main.import_ref.8f2: <witness> = import_ref Main//a, loc5_1, loaded [template = constants.%complete_type]
// CHECK:STDOUT:   %Main.import_ref.fd7 = import_ref Main//a, inst16 [no loc], unloaded
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [template] {
// CHECK:STDOUT:     .Empty = imports.%Main.Empty
// CHECK:STDOUT:     .Incomplete = imports.%Main.Incomplete
// CHECK:STDOUT:     .Core = imports.%Core
// CHECK:STDOUT:     .a = %a
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Core.import = import Core
// CHECK:STDOUT:   %default.import = import <none>
// CHECK:STDOUT:   %.decl: type = class_decl @.1 [template = constants.%.a95] {} {}
// CHECK:STDOUT:   name_binding_decl {
// CHECK:STDOUT:     %a.patt: <error> = binding_pattern a
// CHECK:STDOUT:     %.loc25: <error> = var_pattern %a.patt
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %a.var: ref <error> = var a
// CHECK:STDOUT:   %Incomplete.ref: type = name_ref Incomplete, imports.%Main.Incomplete [template = constants.%Incomplete]
// CHECK:STDOUT:   %a: <error> = bind_name a, <error>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Empty [from "a.carbon"] {
// CHECK:STDOUT:   complete_type_witness = imports.%Main.import_ref.8f2
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT:   .Self = imports.%Main.import_ref.fd7
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @.1 {
// 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.%.a95
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Incomplete [from "a.carbon"];
// CHECK:STDOUT: