carbon-lang/toolchain/check/testdata/interop/cpp/class/export/access.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
//
// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/destroy.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/class/export/access.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/class/export/access.carbon

// --- fail_access_exported_private_var.carbon
library "[[@TEST_NAME]]";
import Cpp;

class A {}

class B {
  fn Make() -> Self { return {}; }
  private var a: A = {};
}

inline Cpp '''
void F() {
  auto b = Carbon::B::Make();
  // CHECK:STDERR:        ╭─┤ fail_access_exported_private_var.carbon:[[@LINE+17]]:5
  // CHECK:STDERR:        │   private var a: A = {};
  // CHECK:STDERR:        ·                ┬
  // CHECK:STDERR:        ·                ╰──┤ implicitly declared private here [CppInteropParseNote]
  // CHECK:STDERR:        ┆
  // CHECK:STDERR: ->     │   b.a;
  // CHECK:STDERR:        ·     ┳
  // CHECK:STDERR:        ·     ┗━━┫ error: 'a' is a private member of 'Carbon::Main::B'
  // CHECK:STDERR:        ·        ┃        [CppInteropParseError]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  // CHECK:STDERR:        ╭─┤ fail_access_exported_private_var.carbon:[[@LINE+6]]:5
  // CHECK:STDERR: ->     │   b.a;
  // CHECK:STDERR:        ·   ─ ┳
  // CHECK:STDERR:        ·     ┗━━┫ warning: expression result unused [CppInteropParseWarning]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  b.a;
}
''';

// --- fail_access_exported_private_method.carbon
library "[[@TEST_NAME]]";
import Cpp;

class A {}

class B {
  fn Make() -> Self { return {}; }
  private fn F() {}
}

inline Cpp '''
void G() {
  auto b = Carbon::B::Make();
  // CHECK:STDERR:        ╭─┤ fail_access_exported_private_method.carbon:[[@LINE+11]]:5
  // CHECK:STDERR:        │   private fn F() {}
  // CHECK:STDERR:        ·                  ┬
  // CHECK:STDERR:        ·                  ╰──┤ implicitly declared private here [CppInteropParseNote]
  // CHECK:STDERR:        ┆
  // CHECK:STDERR: ->     │   b.F();
  // CHECK:STDERR:        ·     ┳
  // CHECK:STDERR:        ·     ┗━━┫ error: 'F' is a private member of 'Carbon::Main::B'
  // CHECK:STDERR:        ·        ┃        [CppInteropParseError]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  b.F();
}
''';

// --- fail_access_exported_private_var_in_generic.carbon
library "[[@TEST_NAME]]";
import Cpp;

class A {}

class B(T: type) {
  private var a: A = {};
}

fn MakeB() -> B(A) {
  return {};
}

inline Cpp '''
void F() {
  auto b = Carbon::MakeB();
  // CHECK:STDERR:        ╭─┤ fail_access_exported_private_var_in_generic.carbon:[[@LINE+17]]:5
  // CHECK:STDERR:        │   private var a: A = {};
  // CHECK:STDERR:        ·                ┬
  // CHECK:STDERR:        ·                ╰──┤ implicitly declared private here [CppInteropParseNote]
  // CHECK:STDERR:        ┆
  // CHECK:STDERR: ->     │   b.a;
  // CHECK:STDERR:        ·     ┳
  // CHECK:STDERR:        ·     ┗━━┫ error: 'a' is a private member of 'Carbon::Main::B<Carbon::Main::A>'
  // CHECK:STDERR:        ·        ┃        [CppInteropParseError]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  // CHECK:STDERR:        ╭─┤ fail_access_exported_private_var_in_generic.carbon:[[@LINE+6]]:5
  // CHECK:STDERR: ->     │   b.a;
  // CHECK:STDERR:        ·   ─ ┳
  // CHECK:STDERR:        ·     ┗━━┫ warning: expression result unused [CppInteropParseWarning]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  b.a;
}
''';

// --- fail_todo_access_exported_private_method_in_generic.carbon
library "[[@TEST_NAME]]";
import Cpp;

class A {}

class B(T: type) {
  // TODO: exporting of methods in generics is not yet supported.
  // CHECK:STDERR:        ╭─┤ fail_todo_access_exported_private_method_in_generic.carbon:[[@LINE+8]]:3
  // CHECK:STDERR: ->     │   private fn F(unused self) {}
  // CHECK:STDERR:        ·   ┳━━━━━━━━━━━━━━━━━━━━━━━━━━
  // CHECK:STDERR:        ·   ┗━━┫ error: semantics TODO:
  // CHECK:STDERR:        ·      ┃        `support exporting member functions of parameterized classes`
  // CHECK:STDERR:        ·      ┃        [SemanticsTodo]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  private fn F(unused self) {}
}

fn MakeB() -> B(A) {
  return {};
}

inline Cpp '''
void F() {
  auto b = Carbon::MakeB();
  // TODO: this error should be that `F` is a private member of `B`.
  // CHECK:STDERR:        ╭─┤ fail_todo_access_exported_private_method_in_generic.carbon:[[@LINE+7]]:5
  // CHECK:STDERR: ->     │   b.F();
  // CHECK:STDERR:        ·   ─ ┳
  // CHECK:STDERR:        ·     ┗━━┫ error: no member named 'F' in 'Carbon::Main::B<Carbon::Main::A>'
  // CHECK:STDERR:        ·        ┃        [CppInteropParseError]
  // CHECK:STDERR:        ╰────
  // CHECK:STDERR:
  b.F();
}
''';

// --- access_exported_private_member_of_friend.carbon
library "[[@TEST_NAME]]";
import Cpp;

inline Cpp '''
class C;
''';

alias C = Cpp.C;

class A {}

class B {
  friend C;
  fn Make() -> Self { return {}; }
  private fn F() {}
}

inline Cpp '''
class C {
  void G() {
    auto b = Carbon::B::Make();
    b.F();
  }
};
''';