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carbon-lang/toolchain/check/testdata/class/partial.carbon
T
Jon Ross-Perkins 49ba8cf3e1 Switch class to use a blanket impl for Destroy (#6125) 
Right now, the class destroy impl is incorrectly generated (first
discussed [in
Discord](https://discord.com/channels/655572317891461132/941071822756143115/1418614787449032826)).
If we want it to be correct, deferred definition logic would need to be
added, and the declaration would need to be moved inside the `class`
scope (along with whatever generic logic that needs).

This instead switches to a blanket impl, to avoid creating latent bugs
with generating the `impl` and function body in the wrong scope. This
approach uses the same blanket impl as aggregate destruction that was
added by #6098.

The intent here is to allow progress on other parts of `Destroy`. For
example, under this model the implementation of the function body could
be done as part of lowering the specific.
2025-09-29 16:05:06 +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/convert.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/class/partial.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/partial.carbon
// --- base.carbon
library "[[@TEST_NAME]]";
base class C { }
//@dump-sem-ir-begin
fn A(p: partial C);
//@dump-sem-ir-end
// --- abstract.carbon
library "[[@TEST_NAME]]";
abstract class C { }
//@dump-sem-ir-begin
fn A(p: partial C);
//@dump-sem-ir-end
// --- fail_partial_nondynamic.carbon
library "[[@TEST_NAME]]";
class C { }
//@dump-sem-ir-begin
// CHECK:STDERR: fail_partial_nondynamic.carbon:[[@LINE+4]]:9: error: `partial` applied to final type `C` [PartialOnFinal]
// CHECK:STDERR: fn G(p: partial C);
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
fn G(p: partial C);
//@dump-sem-ir-end
// --- fail_partial_final.carbon
library "[[@TEST_NAME]]";
base class Base { }
class Derived {
extend base: Base;
}
//@dump-sem-ir-begin
// CHECK:STDERR: fail_partial_final.carbon:[[@LINE+4]]:9: error: `partial` applied to final type `Derived` [PartialOnFinal]
// CHECK:STDERR: fn G(p: partial Derived);
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR:
fn G(p: partial Derived);
//@dump-sem-ir-end
// --- fail_partial_decl.carbon
library "[[@TEST_NAME]]";
class C;
// TODO: This diagnostic could be more specific - the type might be non-final,
// but since we only have a declaration, we don't know.
//@dump-sem-ir-begin
// applied to final type `C` [PartialOnFinal] CHECK:STDERR: fn G(p: partial C);
// CHECK:STDERR: fail_partial_decl.carbon:[[@LINE+4]]:9: error: `partial` applied to final type `C` [PartialOnFinal]
// CHECK:STDERR: fn G(p: partial C);
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
fn G(p: partial C);
//@dump-sem-ir-end
// --- fail_partial_tuple.carbon
library "[[@TEST_NAME]]";
class C;
//@dump-sem-ir-begin
// CHECK:STDERR: fail_partial_tuple.carbon:[[@LINE+4]]:9: error: `partial` applied to final type `(C, C)` [PartialOnFinal]
// CHECK:STDERR: fn G(p: partial (C, C));
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
fn G(p: partial (C, C));
//@dump-sem-ir-end
// --- fail_partial_struct.carbon
library "[[@TEST_NAME]]";
class C;
//@dump-sem-ir-begin
// CHECK:STDERR: fail_partial_struct.carbon:[[@LINE+4]]:9: error: `partial` applied to final type `{.x: C}` [PartialOnFinal]
// CHECK:STDERR: fn G(p: partial {.x: C});
// CHECK:STDERR: ^~~~~~~~~~~~~~~
// CHECK:STDERR:
fn G(p: partial {.x: C});
//@dump-sem-ir-end
// --- fail_duplicate.carbon
library "[[@TEST_NAME]]";
base class C { }
//@dump-sem-ir-begin
// CHECK:STDERR: fail_duplicate.carbon:[[@LINE+4]]:9: error: `partial` applied to final type `partial C` [PartialOnFinal]
// CHECK:STDERR: fn F(p: partial (partial C));
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
fn F(p: partial (partial C));
//@dump-sem-ir-end
// --- fail_convert_to_nonpartial.carbon
library "[[@TEST_NAME]]";
base class C { }
fn G(p: partial C*) -> C* {
// CHECK:STDERR: fail_convert_to_nonpartial.carbon:[[@LINE+7]]:3: error: cannot implicitly convert expression of type `partial C*` to `C*` [ConversionFailure]
// CHECK:STDERR: return p;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR: fail_convert_to_nonpartial.carbon:[[@LINE+4]]:3: note: type `partial C*` does not implement interface `Core.ImplicitAs(C*)` [MissingImplInMemberAccessNote]
// CHECK:STDERR: return p;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
return p;
}
// --- fail_derive_from_partial.carbon
library "[[@TEST_NAME]]";
base class C { }
class Derived {
// CHECK:STDERR: fail_derive_from_partial.carbon:[[@LINE+4]]:16: error: deriving from final type `partial C`; base type must be an `abstract` or `base` class [BaseIsFinal]
// CHECK:STDERR: extend base: partial C;
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
extend base: partial C;
}
// --- fail_todo_partial_template_dependent.carbon
library "[[@TEST_NAME]]";
// TODO: This should be accepted because `T` might be final once we know what it
// is.
// CHECK:STDERR: fail_todo_partial_template_dependent.carbon:[[@LINE+4]]:28: error: `partial` applied to final type `T` [PartialOnFinal]
// CHECK:STDERR: fn G[template T:! type](p: partial T*);
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
fn G[template T:! type](p: partial T*);
// --- fail_partial_generic.carbon
library "[[@TEST_NAME]]";
// TODO: Maybe rephrase this to use some common/generic phrasing to refer to the
// generic type and its requirements, as distinct from the concrete type that
// might be used here in any specific.
// CHECK:STDERR: fail_partial_generic.carbon:[[@LINE+4]]:19: error: `partial` applied to final type `T` [PartialOnFinal]
// CHECK:STDERR: fn F[T:! type](p: partial T*);
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
fn F[T:! type](p: partial T*);
// CHECK:STDOUT: --- base.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %.43f: type = partial_type %C [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.43f [concrete]
// CHECK:STDOUT: %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT: %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %A.decl: %A.type = fn_decl @A [concrete = constants.%A] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.43f = value_param call_param0
// CHECK:STDOUT: %.loc6_9.1: type = splice_block %.loc6_9.2 [concrete = constants.%.43f] {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %.loc6_9.2: type = partial_type %C.ref [concrete = constants.%.43f]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.43f = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A(%p.param: %.43f);
// CHECK:STDOUT:
// CHECK:STDOUT: --- abstract.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %.43f: type = partial_type %C [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.43f [concrete]
// CHECK:STDOUT: %A.type: type = fn_type @A [concrete]
// CHECK:STDOUT: %A: %A.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %A.decl: %A.type = fn_decl @A [concrete = constants.%A] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.43f = value_param call_param0
// CHECK:STDOUT: %.loc6_9.1: type = splice_block %.loc6_9.2 [concrete = constants.%.43f] {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %.loc6_9.2: type = partial_type %C.ref [concrete = constants.%.43f]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.43f = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @A(%p.param: %.43f);
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_partial_nondynamic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %.43f: type = partial_type %C [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.43f [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.43f = value_param call_param0
// CHECK:STDOUT: %.loc10_9.1: type = splice_block %.loc10_9.2 [concrete = constants.%.43f] {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %.loc10_9.2: type = partial_type %C.ref [concrete = constants.%.43f]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.43f = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%p.param: %.43f);
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_partial_final.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Derived: type = class_type @Derived [concrete]
// CHECK:STDOUT: %.604: type = partial_type %Derived [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.604 [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.604 = value_param call_param0
// CHECK:STDOUT: %.loc13_9.1: type = splice_block %.loc13_9.2 [concrete = constants.%.604] {
// CHECK:STDOUT: %Derived.ref: type = name_ref Derived, file.%Derived.decl [concrete = constants.%Derived]
// CHECK:STDOUT: %.loc13_9.2: type = partial_type %Derived.ref [concrete = constants.%.604]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.604 = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%p.param: %.604);
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_partial_decl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %.43f: type = partial_type %C [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.43f [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.43f = value_param call_param0
// CHECK:STDOUT: %.loc13_9.1: type = splice_block %.loc13_9.2 [concrete = constants.%.43f] {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %.loc13_9.2: type = partial_type %C.ref [concrete = constants.%.43f]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.43f = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%p.param: %.43f);
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_partial_tuple.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %tuple.type.24b: type = tuple_type (type, type) [concrete]
// CHECK:STDOUT: %tuple.type.56b: type = tuple_type (%C, %C) [concrete]
// CHECK:STDOUT: %.62c: type = partial_type %tuple.type.56b [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.62c [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.62c = value_param call_param0
// CHECK:STDOUT: %.loc10_9.1: type = splice_block %.loc10_9.3 [concrete = constants.%.62c] {
// CHECK:STDOUT: %C.ref.loc10_18: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %C.ref.loc10_21: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %.loc10_22: %tuple.type.24b = tuple_literal (%C.ref.loc10_18, %C.ref.loc10_21)
// CHECK:STDOUT: %.loc10_9.2: type = converted %.loc10_22, constants.%tuple.type.56b [concrete = constants.%tuple.type.56b]
// CHECK:STDOUT: %.loc10_9.3: type = partial_type %.loc10_9.2 [concrete = constants.%.62c]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.62c = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%p.param: %.62c);
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_partial_struct.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %struct_type.x: type = struct_type {.x: %C} [concrete]
// CHECK:STDOUT: %.1ed: type = partial_type %struct_type.x [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.1ed [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.1ed = value_param call_param0
// CHECK:STDOUT: %.loc10_9.1: type = splice_block %.loc10_9.2 [concrete = constants.%.1ed] {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %struct_type.x: type = struct_type {.x: %C} [concrete = constants.%struct_type.x]
// CHECK:STDOUT: %.loc10_9.2: type = partial_type %struct_type.x [concrete = constants.%.1ed]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.1ed = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%p.param: %.1ed);
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_duplicate.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %.43f: type = partial_type %C [concrete]
// CHECK:STDOUT: %.a34: type = partial_type %.43f [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %.a34 [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %p.patt: %pattern_type = binding_pattern p [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type = value_param_pattern %p.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %p.param: %.a34 = value_param call_param0
// CHECK:STDOUT: %.loc10_9.1: type = splice_block %.loc10_9.2 [concrete = constants.%.a34] {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %.loc10_18: type = partial_type %C.ref [concrete = constants.%.43f]
// CHECK:STDOUT: %.loc10_9.2: type = partial_type %.loc10_18 [concrete = constants.%.a34]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %.a34 = bind_name p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%p.param: %.a34);
// CHECK:STDOUT:
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