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fdb188ccfd
Implementation of unused pattern bindings #2022, continued. Whereas previous PR #6460 took care of parsing, and PR #6479 prepared the stage by using _ in some test cases, this PR has the the actual implementation, using a simple dataflow analysis. --------- Co-authored-by: Burak Emir <bqe@google.com> Co-authored-by: jonmeow <jperkins@google.com>
394 lines
20 KiB
Plaintext
394 lines
20 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/convert.carbon
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// EXTRA-ARGS: --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/impls/destroy.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/impls/destroy.carbon
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// --- types.h
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class PublicDestructor {
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public:
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~PublicDestructor();
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};
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class TrivialDestructor {
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public:
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~TrivialDestructor() = default;
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};
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template<int N = 0>
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class AmbiguousDestructorT {
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public:
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~AmbiguousDestructorT() requires (N != 1);
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~AmbiguousDestructorT() requires (N != 2);
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};
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using AmbiguousDestructor = AmbiguousDestructorT<>;
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class DeletedDestructor {
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public:
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~DeletedDestructor() = delete;
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};
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class PrivateDestructor {
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private:
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~PrivateDestructor();
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};
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class ProtectedDestructor {
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protected:
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~ProtectedDestructor();
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};
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// --- destroy_destroyable.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "types.h";
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// Dump the whole file so we can see that the trivial destructor maps to a
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// "no_op" builtin.
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//@include-in-dumps
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fn PublicDestroy() {
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var unused a: Cpp.PublicDestructor = {};
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}
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fn TrivialDestroy() {
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var unused a: Cpp.TrivialDestructor = {};
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}
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// --- destroy_protected_base_destructor.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "types.h";
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class Derived {
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extend base: Cpp.ProtectedDestructor;
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}
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fn DestroyClassWithProtectedBaseDestructor() {
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//@dump-sem-ir-begin
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var unused a: Derived = {.base = {}};
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//@dump-sem-ir-end
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}
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// --- todo_fail_destroy_private_base_destructor.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "types.h";
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class Derived {
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extend base: Cpp.PrivateDestructor;
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}
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fn DestroyClassWithPrivateBaseDestructor() {
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//@dump-sem-ir-begin
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// TODO: We should not allow this, as the destructor of the base class is private.
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var unused a: Derived = {.base = {}};
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//@dump-sem-ir-end
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}
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// --- fail_destroy_nondestroyable.carbon
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library "[[@TEST_NAME]]";
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+16]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:13:7: error: destructor of class 'AmbiguousDestructorT<>' is ambiguous [CppInteropParseError]
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// CHECK:STDERR: 13 | class AmbiguousDestructorT {
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+12]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:13:7: note: in instantiation of template class 'AmbiguousDestructorT<>' requested here [CppInteropParseNote]
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// CHECK:STDERR: 13 | class AmbiguousDestructorT {
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+8]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:15:3: note: candidate function [CppInteropParseNote]
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// CHECK:STDERR: 15 | ~AmbiguousDestructorT() requires (N != 1);
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+4]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:16:3: note: candidate function [CppInteropParseNote]
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// CHECK:STDERR: 16 | ~AmbiguousDestructorT() requires (N != 2);
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// CHECK:STDERR: | ^
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import Cpp library "types.h";
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fn AmbiguousDestroy() {
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+4]]:17: note: while completing C++ type `Cpp.AmbiguousDestructorT` [InCppTypeCompletion]
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// CHECK:STDERR: var unused a: Cpp.AmbiguousDestructor = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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var unused a: Cpp.AmbiguousDestructor = {};
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}
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fn DeletedDestroy() {
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+8]]:3: error: attempt to use a deleted function [CppInteropParseError]
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// CHECK:STDERR: 39 | var unused a: Cpp.DeletedDestructor = {};
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// CHECK:STDERR: | ^
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE-14]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:23:3: note: '~DeletedDestructor' has been explicitly marked deleted here [CppInteropParseNote]
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// CHECK:STDERR: 23 | ~DeletedDestructor() = delete;
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// CHECK:STDERR: | ^
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// CHECK:STDERR:
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var unused a: Cpp.DeletedDestructor = {};
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}
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fn PrivateDestroy() {
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+8]]:3: error: cannot access private member `<C++ destructor>` of type `Cpp.PrivateDestructor` [ClassInvalidMemberAccess]
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// CHECK:STDERR: var unused a: Cpp.PrivateDestructor = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE-26]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:28:3: note: declared here [ClassMemberDeclaration]
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// CHECK:STDERR: ~PrivateDestructor();
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var unused a: Cpp.PrivateDestructor = {};
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}
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fn ProtectedDestroy() {
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE+8]]:3: error: cannot access protected member `<C++ destructor>` of type `Cpp.ProtectedDestructor` [ClassInvalidMemberAccess]
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// CHECK:STDERR: var unused a: Cpp.ProtectedDestructor = {};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_destroy_nondestroyable.carbon:[[@LINE-38]]:10: in file included here [InCppInclude]
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// CHECK:STDERR: ./types.h:33:3: note: declared here [ClassMemberDeclaration]
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// CHECK:STDERR: ~ProtectedDestructor();
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// CHECK:STDERR: ^
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// CHECK:STDERR:
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var unused a: Cpp.ProtectedDestructor = {};
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}
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// --- destroy_generically.carbon
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library "[[@TEST_NAME]]";
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import Cpp library "types.h";
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fn Destroy[T:! Core.Copy & Core.Destroy](c: T) {
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var unused d: T = c;
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}
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fn DoDestroy() {
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Destroy({} as Cpp.PublicDestructor);
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}
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class Wrap(T:! Core.Destroy) {}
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fn EqualWitnesses(p: Wrap(Cpp.PublicDestructor)*) -> Wrap(Cpp.PublicDestructor)* {
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return p;
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}
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// CHECK:STDOUT: --- destroy_destroyable.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %PublicDestroy.type: type = fn_type @PublicDestroy [concrete]
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// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
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// CHECK:STDOUT: %PublicDestroy: %PublicDestroy.type = struct_value () [concrete]
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// CHECK:STDOUT: %PublicDestructor: type = class_type @PublicDestructor [concrete]
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
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// CHECK:STDOUT: %pattern_type.27d: type = pattern_type %PublicDestructor [concrete]
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// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
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// CHECK:STDOUT: %PublicDestructor.val: %PublicDestructor = struct_value () [concrete]
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// CHECK:STDOUT: %Destroy.type: type = facet_type <@Destroy> [concrete]
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// CHECK:STDOUT: %PublicDestructor.cpp_destructor.type: type = fn_type @PublicDestructor.cpp_destructor [concrete]
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// CHECK:STDOUT: %PublicDestructor.cpp_destructor: %PublicDestructor.cpp_destructor.type = struct_value () [concrete]
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// CHECK:STDOUT: %TrivialDestroy.type: type = fn_type @TrivialDestroy [concrete]
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// CHECK:STDOUT: %TrivialDestroy: %TrivialDestroy.type = struct_value () [concrete]
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// CHECK:STDOUT: %TrivialDestructor: type = class_type @TrivialDestructor [concrete]
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// CHECK:STDOUT: %pattern_type.1b8: type = pattern_type %TrivialDestructor [concrete]
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// CHECK:STDOUT: %TrivialDestructor.val: %TrivialDestructor = struct_value () [concrete]
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// CHECK:STDOUT: %TrivialDestructor.cpp_destructor.type: type = fn_type @TrivialDestructor.cpp_destructor [concrete]
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// CHECK:STDOUT: %TrivialDestructor.cpp_destructor: %TrivialDestructor.cpp_destructor.type = struct_value () [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
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// CHECK:STDOUT: .Destroy = %Core.Destroy
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// CHECK:STDOUT: import Core//prelude
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// CHECK:STDOUT: import Core//prelude/...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Cpp: <namespace> = namespace file.%Cpp.import_cpp, [concrete] {
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// CHECK:STDOUT: .PublicDestructor = %PublicDestructor.decl
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// CHECK:STDOUT: .TrivialDestructor = %TrivialDestructor.decl
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// CHECK:STDOUT: import Cpp//...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %PublicDestructor.decl: type = class_decl @PublicDestructor [concrete = constants.%PublicDestructor] {} {}
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// CHECK:STDOUT: %Core.Destroy: type = import_ref Core//prelude/parts/destroy, Destroy, loaded [concrete = constants.%Destroy.type]
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// CHECK:STDOUT: %TrivialDestructor.decl: type = class_decl @TrivialDestructor [concrete = constants.%TrivialDestructor] {} {}
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
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// CHECK:STDOUT: .Core = imports.%Core
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// CHECK:STDOUT: .Cpp = imports.%Cpp
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// CHECK:STDOUT: .PublicDestroy = %PublicDestroy.decl
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// CHECK:STDOUT: .TrivialDestroy = %TrivialDestroy.decl
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %Cpp.import_cpp = import_cpp {
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// CHECK:STDOUT: import Cpp "types.h"
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %PublicDestroy.decl: %PublicDestroy.type = fn_decl @PublicDestroy [concrete = constants.%PublicDestroy] {} {}
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// CHECK:STDOUT: %TrivialDestroy.decl: %TrivialDestroy.type = fn_decl @TrivialDestroy [concrete = constants.%TrivialDestroy] {} {}
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @PublicDestructor {
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
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// CHECK:STDOUT: complete_type_witness = %complete_type
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: import Cpp//...
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @TrivialDestructor {
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete = constants.%empty_struct_type]
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// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete = constants.%complete_type]
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// CHECK:STDOUT: complete_type_witness = %complete_type
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: import Cpp//...
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @PublicDestroy() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %a.patt: %pattern_type.27d = ref_binding_pattern a [concrete]
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// CHECK:STDOUT: %a.var_patt: %pattern_type.27d = var_pattern %a.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a.var: ref %PublicDestructor = var %a.var_patt
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// CHECK:STDOUT: %.loc11_41.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc11_41.2: init %PublicDestructor to %a.var = class_init () [concrete = constants.%PublicDestructor.val]
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// CHECK:STDOUT: %.loc11_3: init %PublicDestructor = converted %.loc11_41.1, %.loc11_41.2 [concrete = constants.%PublicDestructor.val]
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// CHECK:STDOUT: assign %a.var, %.loc11_3
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// CHECK:STDOUT: %.loc11_20: type = splice_block %PublicDestructor.ref [concrete = constants.%PublicDestructor] {
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// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %PublicDestructor.ref: type = name_ref PublicDestructor, imports.%PublicDestructor.decl [concrete = constants.%PublicDestructor]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a: ref %PublicDestructor = ref_binding a, %a.var
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// CHECK:STDOUT: %PublicDestructor.cpp_destructor.bound: <bound method> = bound_method %a.var, constants.%PublicDestructor.cpp_destructor
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// CHECK:STDOUT: %PublicDestructor.cpp_destructor.call: init %empty_tuple.type = call %PublicDestructor.cpp_destructor.bound(%a.var)
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @PublicDestructor.cpp_destructor(%self.param: ref %PublicDestructor);
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @TrivialDestroy() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %a.patt: %pattern_type.1b8 = ref_binding_pattern a [concrete]
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// CHECK:STDOUT: %a.var_patt: %pattern_type.1b8 = var_pattern %a.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a.var: ref %TrivialDestructor = var %a.var_patt
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// CHECK:STDOUT: %.loc15_42.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc15_42.2: init %TrivialDestructor to %a.var = class_init () [concrete = constants.%TrivialDestructor.val]
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// CHECK:STDOUT: %.loc15_3: init %TrivialDestructor = converted %.loc15_42.1, %.loc15_42.2 [concrete = constants.%TrivialDestructor.val]
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// CHECK:STDOUT: assign %a.var, %.loc15_3
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// CHECK:STDOUT: %.loc15_20: type = splice_block %TrivialDestructor.ref [concrete = constants.%TrivialDestructor] {
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// CHECK:STDOUT: %Cpp.ref: <namespace> = name_ref Cpp, imports.%Cpp [concrete = imports.%Cpp]
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// CHECK:STDOUT: %TrivialDestructor.ref: type = name_ref TrivialDestructor, imports.%TrivialDestructor.decl [concrete = constants.%TrivialDestructor]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a: ref %TrivialDestructor = ref_binding a, %a.var
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// CHECK:STDOUT: %TrivialDestructor.cpp_destructor.bound: <bound method> = bound_method %a.var, constants.%TrivialDestructor.cpp_destructor
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// CHECK:STDOUT: %TrivialDestructor.cpp_destructor.call: init %empty_tuple.type = call %TrivialDestructor.cpp_destructor.bound(%a.var)
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @TrivialDestructor.cpp_destructor(%self.param: ref %TrivialDestructor) = "no_op";
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// CHECK:STDOUT:
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// CHECK:STDOUT: --- destroy_protected_base_destructor.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %Derived: type = class_type @Derived [concrete]
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// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
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// CHECK:STDOUT: %ProtectedDestructor: type = class_type @ProtectedDestructor [concrete]
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
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// CHECK:STDOUT: %pattern_type.9f6: type = pattern_type %Derived [concrete]
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// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
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// CHECK:STDOUT: %struct_type.base.f5e: type = struct_type {.base: %empty_struct_type} [concrete]
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// CHECK:STDOUT: %struct: %struct_type.base.f5e = struct_value (%empty_struct) [concrete]
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// CHECK:STDOUT: %ProtectedDestructor.val: %ProtectedDestructor = struct_value () [concrete]
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// CHECK:STDOUT: %Derived.val: %Derived = struct_value (%ProtectedDestructor.val) [concrete]
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// CHECK:STDOUT: %DestroyOp.type: type = fn_type @DestroyOp [concrete]
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// CHECK:STDOUT: %DestroyOp: %DestroyOp.type = struct_value () [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @DestroyClassWithProtectedBaseDestructor() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %a.patt: %pattern_type.9f6 = ref_binding_pattern a [concrete]
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// CHECK:STDOUT: %a.var_patt: %pattern_type.9f6 = var_pattern %a.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a.var: ref %Derived = var %a.var_patt
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// CHECK:STDOUT: %.loc12_37.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc12_38.1: %struct_type.base.f5e = struct_literal (%.loc12_37.1) [concrete = constants.%struct]
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// CHECK:STDOUT: %.loc12_38.2: ref %ProtectedDestructor = class_element_access %a.var, element0
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// CHECK:STDOUT: %.loc12_37.2: init %ProtectedDestructor to %.loc12_38.2 = class_init () [concrete = constants.%ProtectedDestructor.val]
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// CHECK:STDOUT: %.loc12_38.3: init %ProtectedDestructor = converted %.loc12_37.1, %.loc12_37.2 [concrete = constants.%ProtectedDestructor.val]
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// CHECK:STDOUT: %.loc12_38.4: init %Derived to %a.var = class_init (%.loc12_38.3) [concrete = constants.%Derived.val]
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// CHECK:STDOUT: %.loc12_3: init %Derived = converted %.loc12_38.1, %.loc12_38.4 [concrete = constants.%Derived.val]
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// CHECK:STDOUT: assign %a.var, %.loc12_3
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// CHECK:STDOUT: %Derived.ref: type = name_ref Derived, file.%Derived.decl [concrete = constants.%Derived]
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// CHECK:STDOUT: %a: ref %Derived = ref_binding a, %a.var
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// CHECK:STDOUT: %DestroyOp.bound: <bound method> = bound_method %a.var, constants.%DestroyOp
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// CHECK:STDOUT: %DestroyOp.call: init %empty_tuple.type = call %DestroyOp.bound(%a.var)
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @DestroyOp(%self.param: ref %Derived) = "no_op";
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// CHECK:STDOUT:
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// CHECK:STDOUT: --- todo_fail_destroy_private_base_destructor.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %Derived: type = class_type @Derived [concrete]
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// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
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// CHECK:STDOUT: %PrivateDestructor: type = class_type @PrivateDestructor [concrete]
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// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
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// CHECK:STDOUT: %pattern_type.9f6: type = pattern_type %Derived [concrete]
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// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
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// CHECK:STDOUT: %struct_type.base.f5e: type = struct_type {.base: %empty_struct_type} [concrete]
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// CHECK:STDOUT: %struct: %struct_type.base.f5e = struct_value (%empty_struct) [concrete]
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// CHECK:STDOUT: %PrivateDestructor.val: %PrivateDestructor = struct_value () [concrete]
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// CHECK:STDOUT: %Derived.val: %Derived = struct_value (%PrivateDestructor.val) [concrete]
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// CHECK:STDOUT: %DestroyOp.type: type = fn_type @DestroyOp [concrete]
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// CHECK:STDOUT: %DestroyOp: %DestroyOp.type = struct_value () [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @DestroyClassWithPrivateBaseDestructor() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %a.patt: %pattern_type.9f6 = ref_binding_pattern a [concrete]
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// CHECK:STDOUT: %a.var_patt: %pattern_type.9f6 = var_pattern %a.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %a.var: ref %Derived = var %a.var_patt
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// CHECK:STDOUT: %.loc13_37.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
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// CHECK:STDOUT: %.loc13_38.1: %struct_type.base.f5e = struct_literal (%.loc13_37.1) [concrete = constants.%struct]
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// CHECK:STDOUT: %.loc13_38.2: ref %PrivateDestructor = class_element_access %a.var, element0
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// CHECK:STDOUT: %.loc13_37.2: init %PrivateDestructor to %.loc13_38.2 = class_init () [concrete = constants.%PrivateDestructor.val]
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// CHECK:STDOUT: %.loc13_38.3: init %PrivateDestructor = converted %.loc13_37.1, %.loc13_37.2 [concrete = constants.%PrivateDestructor.val]
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// CHECK:STDOUT: %.loc13_38.4: init %Derived to %a.var = class_init (%.loc13_38.3) [concrete = constants.%Derived.val]
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// CHECK:STDOUT: %.loc13_3: init %Derived = converted %.loc13_38.1, %.loc13_38.4 [concrete = constants.%Derived.val]
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// CHECK:STDOUT: assign %a.var, %.loc13_3
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// CHECK:STDOUT: %Derived.ref: type = name_ref Derived, file.%Derived.decl [concrete = constants.%Derived]
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// CHECK:STDOUT: %a: ref %Derived = ref_binding a, %a.var
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// CHECK:STDOUT: %DestroyOp.bound: <bound method> = bound_method %a.var, constants.%DestroyOp
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// CHECK:STDOUT: %DestroyOp.call: init %empty_tuple.type = call %DestroyOp.bound(%a.var)
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// CHECK:STDOUT: <elided>
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @DestroyOp(%self.param: ref %Derived) = "no_op";
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// CHECK:STDOUT:
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