mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 18:51:11 +01:00
Christopher Di BellaandRichard Smith
4df2b6ea9d
Iterators, smart pointers, optional, and expected types depend on `operator*`. This commit adds `CppUnsafeDeref` as a core interface, with an associated function, so that the compiler can dereference user-defined C++ types. Things not implemented in this commit: * `operator*` overload resolution * SemIR lowering --------- Co-authored-by: Richard Smith <richard@metafoo.co.uk>
120 lines
3.7 KiB
Plaintext
120 lines
3.7 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/full.carbon
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//
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// EXTRA-ARGS: --target=aarch64-unknown-linux --clang-arg=--std=c++20
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/interop/cpp/deref.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interop/cpp/deref.carbon
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// --- fail_todo_const_deref.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''c++
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class ConstDeref {
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public:
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auto operator*() const -> int&;
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};
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''';
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fn TestDerefPass(var int_ptr: Cpp.ConstDeref) -> ref i32 {
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// CHECK:STDERR: fail_todo_const_deref.carbon:[[@LINE+4]]:10: error: semantics TODO: `Unsupported definition of interface CppUnsafeDeref` [SemanticsTodo]
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// CHECK:STDERR: return int_ptr.(Core.CppUnsafeDeref.Op)();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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return int_ptr.(Core.CppUnsafeDeref.Op)();
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}
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// --- fail_todo_mutable_deref.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''c++
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class MutableDeref {
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public:
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auto operator*() -> int&;
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};
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''';
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fn TestDerefPass(var int_ptr: Cpp.MutableDeref) -> ref i32 {
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// CHECK:STDERR: fail_todo_mutable_deref.carbon:[[@LINE+4]]:10: error: semantics TODO: `Unsupported definition of interface CppUnsafeDeref` [SemanticsTodo]
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// CHECK:STDERR: return int_ptr.(Core.CppUnsafeDeref.Op)();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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return int_ptr.(Core.CppUnsafeDeref.Op)();
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}
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// --- fail_todo_multi_deref.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''c++
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class MultiDeref {
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public:
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auto operator*() & -> int&;
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auto operator*() const& -> const int&;
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auto operator*() && -> int&&;
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auto operator*() const&& -> int const&&;
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};
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''';
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fn TestDerefPass(var int_ptr: Cpp.MultiDeref) -> ref i32 {
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// CHECK:STDERR: fail_todo_multi_deref.carbon:[[@LINE+4]]:10: error: semantics TODO: `operator* overload sets not implemented yet` [SemanticsTodo]
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// CHECK:STDERR: return int_ptr.(Core.CppUnsafeDeref.Op)();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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return int_ptr.(Core.CppUnsafeDeref.Op)();
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}
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// --- fail_todo_maybe_deref.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''c++
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template<class T, class U>
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concept SameImpl = __is_same(T, U);
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template<class T, class U>
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concept SameAs = SameImpl<T, U> && SameImpl<U, T>;
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template<class T>
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class MaybeDeref {
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public:
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auto operator*() const -> int&
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requires SameAs<T, int>;
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auto operator*() const -> const T&;
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};
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''';
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fn TestDerefPass(var int_ptr: Cpp.MaybeDeref(i32)) -> ref i32 {
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// CHECK:STDERR: fail_todo_maybe_deref.carbon:[[@LINE+4]]:10: error: semantics TODO: `operator* overload sets not implemented yet` [SemanticsTodo]
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// CHECK:STDERR: return int_ptr.(Core.CppUnsafeDeref.Op)();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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return int_ptr.(Core.CppUnsafeDeref.Op)();
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}
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// --- fail_not_a_ptr.carbon
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library "[[@TEST_NAME]]";
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import Cpp inline '''c++
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class NotAPtr {};
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''';
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fn TestDerefFail(not_ptr: Cpp.NotAPtr) {
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// CHECK:STDERR: fail_not_a_ptr.carbon:[[@LINE+4]]:3: error: cannot access member of interface `Core.CppUnsafeDeref` in type `Cpp.NotAPtr` that does not implement that interface [MissingImplInMemberAccess]
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// CHECK:STDERR: not_ptr.(Core.CppUnsafeDeref.Op)();
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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not_ptr.(Core.CppUnsafeDeref.Op)();
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}
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