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carbon-lang/toolchain/check/testdata/interop/cpp/class/export/base.carbon
T
Richard SmithandChandler Carruth c588eadb57 Rename and rearrange entities in tests to avoid name reuse (#7656)
Fix a bunch of cases where we use the same external name to mean
multiple different things in the same test. We've historically gotten
away with this, but under `--share-cpp-ast`, it becomes an error, at
least if the entity is either defined in, or used from, C++ code.

Assisted-by: Gemini via Antigravity (original change) and Claude Code
(suggested edits in review)

---------

Co-authored-by: Chandler Carruth <chandlerc@gmail.com>
2026-08-21 01:36:40 +00:00

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// 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/int.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/base.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/class/export/base.carbon
// --- derived_to_base.carbon
library "[[@TEST_NAME]]";
import Cpp;
base class A {}
class B {
extend base: A;
}
inline Cpp '''
Carbon::A* Convert(Carbon::B* p) {
return p;
}
''';
// --- name_lookup.carbon
library "[[@TEST_NAME]]";
import Cpp;
base class LookupBase {
fn F();
fn G(n: i32);
}
class LookupDerived {
extend base: LookupBase;
fn G();
}
inline Cpp '''
void Qualified() {
Carbon::LookupDerived::F();
Carbon::LookupDerived::G();
}
void MemberAccess(Carbon::LookupBase *a, Carbon::LookupDerived *b) {
b->F();
b->G();
}
''';
// --- fail_derive_from_final.carbon
library "[[@TEST_NAME]]";
import Cpp;
class FinalClass {}
inline Cpp '''
// CHECK:STDERR: fail_derive_from_final.carbon:[[@LINE+7]]:12: error: base 'FinalClass' is marked 'final' [CppInteropParseError]
// CHECK:STDERR: 15 | struct A : Carbon::FinalClass {};
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_derive_from_final.carbon:[[@LINE-6]]:18: note: 'FinalClass' declared here [CppInteropParseNote]
// CHECK:STDERR: 5 | class FinalClass {}
// CHECK:STDERR: | ^
// CHECK:STDERR:
struct A : Carbon::FinalClass {};
''';
// --- fail_abstract.carbon
library "[[@TEST_NAME]]";
import Cpp;
// TODO: Add a way to give a class a virtual destructor without C++ interop.
inline Cpp '''
struct VirtualDestructor {
virtual ~VirtualDestructor() {}
};
''';
// CHECK:STDERR: fail_abstract.carbon:[[@LINE+4]]:1: error: cannot access member of interface `Core.Destroy` in type `AbstractWithVdtor` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: abstract class AbstractWithVdtor {
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
abstract class AbstractWithVdtor {
extend base: Cpp.VirtualDestructor;
}
inline Cpp '''
// CHECK:STDERR: fail_abstract.carbon:[[@LINE+7]]:27: error: variable type 'Carbon::AbstractWithVdtor' is an abstract class [CppInteropParseError]
// CHECK:STDERR: 28 | Carbon::AbstractWithVdtor x;
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_abstract.carbon:[[@LINE-8]]:34: note: unimplemented pure virtual method '~AbstractWithVdtor' in 'AbstractWithVdtor' [CppInteropParseNote]
// CHECK:STDERR: 16 | abstract class AbstractWithVdtor {
// CHECK:STDERR: | ^
// CHECK:STDERR:
Carbon::AbstractWithVdtor x;
''';
// --- fail_todo_abstract_nonvirtual_dtor.carbon
library "[[@TEST_NAME]]";
import Cpp;
// TODO: Find a way to export this to C++ as an abstract class, despite not
// having a vptr.
// CHECK:STDERR: fail_todo_abstract_nonvirtual_dtor.carbon:[[@LINE+8]]:1: error: semantics TODO: `exporting abstract class with no abstract methods and non-virtual destructor to C++` [SemanticsTodo]
// CHECK:STDERR: abstract class AbstractNonvirtualDtor {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
// CHECK:STDERR: fail_todo_abstract_nonvirtual_dtor.carbon:[[@LINE+4]]:1: error: cannot access member of interface `Core.Destroy` in type `AbstractNonvirtualDtor` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: abstract class AbstractNonvirtualDtor {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
abstract class AbstractNonvirtualDtor {}
inline Cpp '''
class DerivedNonvirtualDtor : public Carbon::AbstractNonvirtualDtor {};
''';
// --- fail_todo_abstract_nonvirtual_dtor_but_virtual_fns.carbon
library "[[@TEST_NAME]]";
import Cpp;
// TODO: We should support generating a base subobject destructor for an
// abstract class, even though we refuse to generate a complete object
// destructor.
// CHECK:STDERR: fail_todo_abstract_nonvirtual_dtor_but_virtual_fns.carbon:[[@LINE+4]]:1: error: cannot access member of interface `Core.Destroy` in type `AbstractWithMethodNoVptr` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: abstract class AbstractWithMethodNoVptr {
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
abstract class AbstractWithMethodNoVptr {
abstract fn F(self);
}
inline Cpp '''
class DerivedWithMethodNoVptr : public Carbon::AbstractWithMethodNoVptr {
};
''';
// --- fail_variable_with_abstract_method.carbon
library "[[@TEST_NAME]]";
import Cpp;
// TODO: We should support generating a base subobject destructor for an
// abstract class, even though we refuse to generate a complete object
// destructor.
// CHECK:STDERR: fail_variable_with_abstract_method.carbon:[[@LINE+4]]:1: error: cannot access member of interface `Core.Destroy` in type `AbstractWithMethod` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: abstract class AbstractWithMethod {
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
abstract class AbstractWithMethod {
abstract fn F(self);
}
inline Cpp '''
// CHECK:STDERR: fail_variable_with_abstract_method.carbon:[[@LINE+7]]:28: error: variable type 'Carbon::AbstractWithMethod' is an abstract class [CppInteropParseError]
// CHECK:STDERR: 24 | Carbon::AbstractWithMethod x_abstract;
// CHECK:STDERR: | ^
// CHECK:STDERR: fail_variable_with_abstract_method.carbon:[[@LINE-7]]:22: note: unimplemented pure virtual method 'F' in 'AbstractWithMethod' [CppInteropParseNote]
// CHECK:STDERR: 13 | abstract fn F(self);
// CHECK:STDERR: | ^
// CHECK:STDERR:
Carbon::AbstractWithMethod x_abstract;
''';
// --- fail_todo_abstract_method_overridden_in_cpp.carbon
library "[[@TEST_NAME]]";
import Cpp;
// TODO: We should support generating a base subobject destructor for an
// abstract class, even though we refuse to generate a complete object
// destructor.
// CHECK:STDERR: fail_todo_abstract_method_overridden_in_cpp.carbon:[[@LINE+4]]:1: error: cannot access member of interface `Core.Destroy` in type `AbstractToOverride` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: abstract class AbstractToOverride {
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
abstract class AbstractToOverride {
abstract fn F(ref self);
}
// A C++ class that overrides the abstract method can be instantiated.
inline Cpp '''
struct DerivedOverriding : Carbon::AbstractToOverride {
void F() & override {}
};
DerivedOverriding d;
''';
// --- override_virtual_dtor.carbon
library "[[@TEST_NAME]]";
import Cpp;
inline Cpp '''
struct BaseWithPureVdtor {
virtual ~BaseWithPureVdtor() = 0;
};
''';
class DerivedWithVdtor {
extend base: Cpp.BaseWithPureVdtor;
}
inline Cpp '''
Carbon::DerivedWithVdtor b;
''';