toolchain/check/testdata/interop/cpp/const/access.carbon - trunk - githubmirror/carbon-lang

toolchain/check/testdata/interop/cpp/const/access.carbon

71 строка2 KB

Nicholas Bishop

Fix accessing members of const/partial types (#7406)

25 июн 2026, 03:07

25 июн 2026, 03:0736d9bed

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

// --- const_member_access.carbon
library "[[@TEST_NAME]]";

import Cpp inline '''
struct S {
  int x;
};

const S& Get();
''';

fn F() {
  Cpp.Get().x;
}

// --- fail_const_member_assign.carbon
library "[[@TEST_NAME]]";

import Cpp inline '''
struct S {
  int x;
};

const S& Get();
''';

fn F() {
  // CHECK:STDERR: fail_const_member_assign.carbon:[[@LINE+11]]:3: error: expression is not assignable [AssignmentToNonAssignable]
  // CHECK:STDERR:   Cpp.Get().x = 123;
  // CHECK:STDERR:   ^~~~~~~~~~~
  // CHECK:STDERR:
  // CHECK:STDERR: fail_const_member_assign.carbon:[[@LINE+7]]:3: error: cannot implicitly convert expression of type `Core.IntLiteral` to `const i32` [ConversionFailure]
  // CHECK:STDERR:   Cpp.Get().x = 123;
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~
  // CHECK:STDERR: fail_const_member_assign.carbon:[[@LINE+4]]:3: note: type `Core.IntLiteral` does not implement interface `Core.ImplicitAs(const i32)` [MissingImplInMemberAccessInContext]
  // CHECK:STDERR:   Cpp.Get().x = 123;
  // CHECK:STDERR:   ^~~~~~~~~~~~~~~~~
  // CHECK:STDERR:
  Cpp.Get().x = 123;
}

// --- fail_const_member_assign_cast.carbon
library "[[@TEST_NAME]]";

import Cpp inline '''
struct S {
  int x;
};

const S& Get();
''';

fn F() {
  // CHECK:STDERR: fail_const_member_assign_cast.carbon:[[@LINE+4]]:3: error: expression is not assignable [AssignmentToNonAssignable]
  // CHECK:STDERR:   Cpp.Get().x = 123 as i32;
  // CHECK:STDERR:   ^~~~~~~~~~~
  // CHECK:STDERR:
  Cpp.Get().x = 123 as i32;
}