Files
carbon-lang/toolchain/check/testdata/interop/cpp/class/roundtrip.carbon
T
Richard Smith cc4fd39238 Support round-tripping entities through C++ and Carbon. (#7022)
Use the same C++ -> Carbon map for both interop directions, and when
importing an entity from Carbon -> C++, check whether it was originally
a C++ entity and if so return the original.

Assisted-by: Gemini via Google Antigravity
2026-04-07 08:10:21 +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/none.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/roundtrip.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/class/roundtrip.carbon
// --- carbon_to_cpp_to_carbon.carbon
library "[[@TEST_NAME]]";
import Cpp;
class C {}
inline Cpp '''
using CAlias = Carbon::C;
''';
fn F(p: C*) {
let unused q: Cpp.CAlias* = p;
}
// --- cpp_to_carbon_to_cpp.carbon
library "[[@TEST_NAME]]";
import Cpp;
inline Cpp '''
class C {};
''';
alias CAlias = Cpp.C;
inline Cpp '''
auto F(C *p) -> Carbon::CAlias* {
return p;
}
''';