carbon-lang/toolchain/check/testdata/as/unsafe_as.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/unformed.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP:   bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/as/unsafe_as.carbon
// TIP: To dump output, run:
// TIP:   bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/as/unsafe_as.carbon

// --- fail_no_conversion.carbon

library "[[@TEST_NAME]]";

class A {};
class B {};

fn Convert(a: A) -> B {
  // CHECK:STDERR: fail_no_conversion.carbon:[[@LINE+7]]:10: error: cannot convert expression of type `A` to `B` with `unsafe as` [ConversionFailure]
  // CHECK:STDERR:   return a unsafe as B;
  // CHECK:STDERR:          ^~~~~~~~~~~~~
  // CHECK:STDERR: fail_no_conversion.carbon:[[@LINE+4]]:10: note: type `A` does not implement interface `Core.UnsafeAs(B)` [MissingImplInMemberAccessNote]
  // CHECK:STDERR:   return a unsafe as B;
  // CHECK:STDERR:          ^~~~~~~~~~~~~
  // CHECK:STDERR:
  return a unsafe as B;
}