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

// --- header.h

// --- fail_duplicate_cpp_name.carbon

library "[[@TEST_NAME]]";

import Cpp library "header.h";

// CHECK:STDERR: fail_duplicate_cpp_name.carbon:[[@LINE+7]]:11: error: duplicate name `Cpp` being declared in the same scope [NameDeclDuplicate]
// CHECK:STDERR: namespace Cpp;
// CHECK:STDERR:           ^~~
// CHECK:STDERR: fail_duplicate_cpp_name.carbon:[[@LINE-5]]:1: note: name is previously declared here [NameDeclPrevious]
// CHECK:STDERR: import Cpp library "header.h";
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
namespace Cpp;

// --- cpp_in_inner_namespace.carbon

library "[[@TEST_NAME]]";

import Cpp library "header.h";

namespace N;
namespace N.Cpp;

// --- alias.carbon

library "[[@TEST_NAME]]";

import Cpp library "header.h";

alias MyCpp = Cpp;

// --- fail_add_name_to_cpp_namespace.carbon

library "[[@TEST_NAME]]";

import Cpp library "header.h";

// CHECK:STDERR: fail_add_name_to_cpp_namespace.carbon:[[@LINE+7]]:7: error: imported packages cannot be used for declarations [QualifiedDeclOutsidePackage]
// CHECK:STDERR: class Cpp.C {};
// CHECK:STDERR:       ^~~
// CHECK:STDERR: fail_add_name_to_cpp_namespace.carbon:[[@LINE-5]]:1: note: package imported here [QualifiedDeclOutsidePackageSource]
// CHECK:STDERR: import Cpp library "header.h";
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
class Cpp.C {};

// --- api_and_impl.carbon

library "[[@TEST_NAME]]";

import Cpp library "header.h";

// --- api_and_impl.impl.carbon

impl library "[[@TEST_NAME]]";

import Cpp library "header.h";

// CHECK:STDOUT: --- fail_duplicate_cpp_name.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "header.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- cpp_in_inner_namespace.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:     .N = %N
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "header.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %N: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = %Cpp
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp: <namespace> = namespace [concrete] {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- alias.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:     .MyCpp = %MyCpp
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "header.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT:   %MyCpp: <namespace> = bind_alias MyCpp, imports.%Cpp [concrete = imports.%Cpp]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_add_name_to_cpp_namespace.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT:   %C: type = class_type @C [concrete]
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT:   %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     .C = file.%C.decl
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "header.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT:   %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
// 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: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- api_and_impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %Cpp.import_cpp = import_cpp {
// CHECK:STDOUT:     import Cpp "header.h"
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- api_and_impl.impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT:   %Main.Cpp: <namespace> = import_ref Main//api_and_impl, Cpp, loaded
// CHECK:STDOUT:   %Cpp: <namespace> = namespace %Main.Cpp, [concrete] {
// CHECK:STDOUT:     import Cpp//...
// CHECK:STDOUT:   }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT:   package: <namespace> = namespace [concrete] {
// CHECK:STDOUT:     .Cpp = imports.%Cpp
// CHECK:STDOUT:   }
// CHECK:STDOUT:   %default.import.loc2_28.1 = import <none>
// CHECK:STDOUT:   %default.import.loc2_28.2 = import <none>
// CHECK:STDOUT: }
// CHECK:STDOUT: