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carbon-lang/toolchain/check/testdata/operators/overloaded/eq.carbon
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Jon Ross-Perkins c5eba90317 Change Destroy to use a CustomWitness instead of a blanket impl (#6512) 
Pursuant to recent decisions on #6124, switch `Destroy` to use a
`CustomWitness` for its implementation. Right now this is manufacturing
no-op implementation functions on each lookup, which obviously isn't
ideal but is intended as a first pass. I'm mostly trying to find the
right balance between updating the approach to reflect new decisions,
while still breaking apart work in a way.

The `CoreInterface` logic is intended to build on `CoreIdentifier`
support. We have a number of additional interfaces that require
specialized logic, and that'll extend pretty far with C++ interop, so it
seemed easiest to have a generic function for it. That's what's
replacing the logic inside C++ interop that was doing string comparisons
(which could have already been moved to `CoreIdentifier`, I just missed
it in my first pass).

This adds `CustomWitness` support because the `Destroy` witnesses can be
imported cross-file. `CustomWitness` was previously only used for C++
types, which don't yet support import, which is why that wasn't
previously an issue. The addition of `query_specific_interface_id` is
similarly needed in order to get correct sorting of witness blocks when
imported.

This PR also removes builtin constraint logic (note this is in a
separate commit to help review; it's not a separate PR because it's
difficult to split apart without tests breaking). This had been made
generic with the expectation that destroy, copy, move, and conversions
would all need related support. Under the new decision, we are not going
to do blanket impls and will instead just manufacture a `CustomWitness`
for everything.

A lot of SemIR fingerprints change, but that's probably because the
addition of `Destroy` on core classes is yielding structural changes.
2025-12-19 18:36:06 +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/full.carbon
// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/operators/overloaded/eq.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/operators/overloaded/eq.carbon
// --- user.carbon
package User;
class C {};
impl C as Core.EqWith(C) {
fn Equal[self: C](other: C) -> bool;
fn NotEqual[self: C](other: C) -> bool;
}
fn TestEqual(a: C, b: C) -> bool {
return a == b;
}
fn TestNotEqual(a: C, b: C) -> bool {
return a != b;
}
// --- fail_no_impl.carbon
package FailNoImpl;
class D {};
fn TestEqual(a: D, b: D) -> bool {
// CHECK:STDERR: fail_no_impl.carbon:[[@LINE+4]]:10: error: cannot access member of interface `Core.EqWith(D)` in type `D` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: return a == b;
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR:
return a == b;
}
fn TestNotEqual(a: D, b: D) -> bool {
// CHECK:STDERR: fail_no_impl.carbon:[[@LINE+4]]:10: error: cannot access member of interface `Core.EqWith(D)` in type `D` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: return a != b;
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR:
return a != b;
}
// --- fail_no_impl_for_args.carbon
package FailNoImplForArgs;
class C {};
class D {};
impl C as Core.EqWith(C) {
fn Equal[self: C](other: C) -> bool;
fn NotEqual[self: C](other: C) -> bool;
}
fn TestRhsBad(a: C, b: D) -> bool {
// CHECK:STDERR: fail_no_impl_for_args.carbon:[[@LINE+4]]:10: error: cannot access member of interface `Core.EqWith(D)` in type `C` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: return a == b;
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR:
return a == b;
}
fn TestLhsBad(a: D, b: C) -> bool {
// CHECK:STDERR: fail_no_impl_for_args.carbon:[[@LINE+4]]:10: error: cannot access member of interface `Core.EqWith(C)` in type `D` that does not implement that interface [MissingImplInMemberAccess]
// CHECK:STDERR: return a != b;
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR:
return a != b;
}
// CHECK:STDOUT: --- user.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %EqWith.type.c2e: type = generic_interface_type @EqWith [concrete]
// CHECK:STDOUT: %EqWith.generic: %EqWith.type.c2e = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.831: type = pattern_type bool [concrete]
// CHECK:STDOUT: %EqWith.type.ae7: type = facet_type <@EqWith, @EqWith(%C)> [concrete]
// CHECK:STDOUT: %EqWith.impl_witness: <witness> = impl_witness @C.as.EqWith.impl.%EqWith.impl_witness_table [concrete]
// CHECK:STDOUT: %EqWith.Equal.type.ab8: type = fn_type @EqWith.Equal, @EqWith(%C) [concrete]
// CHECK:STDOUT: %EqWith.NotEqual.type.d5e: type = fn_type @EqWith.NotEqual, @EqWith(%C) [concrete]
// CHECK:STDOUT: %pattern_type.476: type = pattern_type %C [concrete]
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [concrete]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.Equal.type: type = fn_type @C.as.EqWith.impl.Equal [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.Equal: %C.as.EqWith.impl.Equal.type = struct_value () [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual.type: type = fn_type @C.as.EqWith.impl.NotEqual [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual: %C.as.EqWith.impl.NotEqual.type = struct_value () [concrete]
// CHECK:STDOUT: %EqWith.facet: %EqWith.type.ae7 = facet_value %C, (%EqWith.impl_witness) [concrete]
// CHECK:STDOUT: %TestEqual.type: type = fn_type @TestEqual [concrete]
// CHECK:STDOUT: %TestEqual: %TestEqual.type = struct_value () [concrete]
// CHECK:STDOUT: %.5c2: type = fn_type_with_self_type %EqWith.Equal.type.ab8, %EqWith.facet [concrete]
// CHECK:STDOUT: %TestNotEqual.type: type = fn_type @TestNotEqual [concrete]
// CHECK:STDOUT: %TestNotEqual: %TestNotEqual.type = struct_value () [concrete]
// CHECK:STDOUT: %.371: type = fn_type_with_self_type %EqWith.NotEqual.type.d5e, %EqWith.facet [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .EqWith = %Core.EqWith
// CHECK:STDOUT: .Bool = %Core.Bool
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.EqWith: %EqWith.type.c2e = import_ref Core//prelude/operators/comparison, EqWith, loaded [concrete = constants.%EqWith.generic]
// CHECK:STDOUT: %Core.Bool: %Bool.type = import_ref Core//prelude/types/bool, Bool, loaded [concrete = constants.%Bool]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .TestEqual = %TestEqual.decl
// CHECK:STDOUT: .TestNotEqual = %TestNotEqual.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: impl_decl @C.as.EqWith.impl [concrete] {} {
// CHECK:STDOUT: %C.ref.loc6_6: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %Core.ref: <namespace> = name_ref Core, imports.%Core [concrete = imports.%Core]
// CHECK:STDOUT: %EqWith.ref: %EqWith.type.c2e = name_ref EqWith, imports.%Core.EqWith [concrete = constants.%EqWith.generic]
// CHECK:STDOUT: %C.ref.loc6_23: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %EqWith.type: type = facet_type <@EqWith, @EqWith(constants.%C)> [concrete = constants.%EqWith.type.ae7]
// CHECK:STDOUT: }
// CHECK:STDOUT: %TestEqual.decl: %TestEqual.type = fn_decl @TestEqual [concrete = constants.%TestEqual] {
// CHECK:STDOUT: %a.patt: %pattern_type.476 = value_binding_pattern a [concrete]
// CHECK:STDOUT: %a.param_patt: %pattern_type.476 = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT: %b.patt: %pattern_type.476 = value_binding_pattern b [concrete]
// CHECK:STDOUT: %b.param_patt: %pattern_type.476 = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc11_29.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc11_29.2: type = converted %Bool.call, %.loc11_29.1 [concrete = bool]
// CHECK:STDOUT: %a.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc11_17: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %a: %C = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref.loc11_23: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %b: %C = value_binding b, %b.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %TestNotEqual.decl: %TestNotEqual.type = fn_decl @TestNotEqual [concrete = constants.%TestNotEqual] {
// CHECK:STDOUT: %a.patt: %pattern_type.476 = value_binding_pattern a [concrete]
// CHECK:STDOUT: %a.param_patt: %pattern_type.476 = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT: %b.patt: %pattern_type.476 = value_binding_pattern b [concrete]
// CHECK:STDOUT: %b.param_patt: %pattern_type.476 = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc15_32.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc15_32.2: type = converted %Bool.call, %.loc15_32.1 [concrete = bool]
// CHECK:STDOUT: %a.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc15_20: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %a: %C = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref.loc15_26: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %b: %C = value_binding b, %b.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.EqWith.impl: %C.ref.loc6_6 as %EqWith.type {
// CHECK:STDOUT: %C.as.EqWith.impl.Equal.decl: %C.as.EqWith.impl.Equal.type = fn_decl @C.as.EqWith.impl.Equal [concrete = constants.%C.as.EqWith.impl.Equal] {
// CHECK:STDOUT: %self.patt: %pattern_type.476 = value_binding_pattern self [concrete]
// CHECK:STDOUT: %self.param_patt: %pattern_type.476 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT: %other.patt: %pattern_type.476 = value_binding_pattern other [concrete]
// CHECK:STDOUT: %other.param_patt: %pattern_type.476 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc7_34.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc7_34.2: type = converted %Bool.call, %.loc7_34.1 [concrete = bool]
// CHECK:STDOUT: %self.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc7_18: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %self: %C = value_binding self, %self.param
// CHECK:STDOUT: %other.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref.loc7_28: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %other: %C = value_binding other, %other.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual.decl: %C.as.EqWith.impl.NotEqual.type = fn_decl @C.as.EqWith.impl.NotEqual [concrete = constants.%C.as.EqWith.impl.NotEqual] {
// CHECK:STDOUT: %self.patt: %pattern_type.476 = value_binding_pattern self [concrete]
// CHECK:STDOUT: %self.param_patt: %pattern_type.476 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT: %other.patt: %pattern_type.476 = value_binding_pattern other [concrete]
// CHECK:STDOUT: %other.param_patt: %pattern_type.476 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc8_37.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc8_37.2: type = converted %Bool.call, %.loc8_37.1 [concrete = bool]
// CHECK:STDOUT: %self.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc8_21: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %self: %C = value_binding self, %self.param
// CHECK:STDOUT: %other.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref.loc8_31: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %other: %C = value_binding other, %other.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %EqWith.impl_witness_table = impl_witness_table (%C.as.EqWith.impl.Equal.decl, %C.as.EqWith.impl.NotEqual.decl), @C.as.EqWith.impl [concrete]
// CHECK:STDOUT: %EqWith.impl_witness: <witness> = impl_witness %EqWith.impl_witness_table [concrete = constants.%EqWith.impl_witness]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .C = <poisoned>
// CHECK:STDOUT: .Equal = %C.as.EqWith.impl.Equal.decl
// CHECK:STDOUT: .NotEqual = %C.as.EqWith.impl.NotEqual.decl
// CHECK:STDOUT: witness = %EqWith.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.as.EqWith.impl.Equal(%self.param: %C, %other.param: %C) -> bool;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.as.EqWith.impl.NotEqual(%self.param: %C, %other.param: %C) -> bool;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @TestEqual(%a.param: %C, %b.param: %C) -> bool {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: %C = name_ref a, %a
// CHECK:STDOUT: %b.ref: %C = name_ref b, %b
// CHECK:STDOUT: %impl.elem0: %.5c2 = impl_witness_access constants.%EqWith.impl_witness, element0 [concrete = constants.%C.as.EqWith.impl.Equal]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %a.ref, %impl.elem0
// CHECK:STDOUT: %C.as.EqWith.impl.Equal.call: init bool = call %bound_method(%a.ref, %b.ref)
// CHECK:STDOUT: return %C.as.EqWith.impl.Equal.call to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @TestNotEqual(%a.param: %C, %b.param: %C) -> bool {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: %C = name_ref a, %a
// CHECK:STDOUT: %b.ref: %C = name_ref b, %b
// CHECK:STDOUT: %impl.elem1: %.371 = impl_witness_access constants.%EqWith.impl_witness, element1 [concrete = constants.%C.as.EqWith.impl.NotEqual]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %a.ref, %impl.elem1
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual.call: init bool = call %bound_method(%a.ref, %b.ref)
// CHECK:STDOUT: return %C.as.EqWith.impl.NotEqual.call to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_no_impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %D: type = class_type @D [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %pattern_type.54d: type = pattern_type %D [concrete]
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [concrete]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.831: type = pattern_type bool [concrete]
// CHECK:STDOUT: %TestEqual.type: type = fn_type @TestEqual [concrete]
// CHECK:STDOUT: %TestEqual: %TestEqual.type = struct_value () [concrete]
// CHECK:STDOUT: %EqWith.type.c2e: type = generic_interface_type @EqWith [concrete]
// CHECK:STDOUT: %EqWith.generic: %EqWith.type.c2e = struct_value () [concrete]
// CHECK:STDOUT: %TestNotEqual.type: type = fn_type @TestNotEqual [concrete]
// CHECK:STDOUT: %TestNotEqual: %TestNotEqual.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Bool = %Core.Bool
// CHECK:STDOUT: .EqWith = %Core.EqWith
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.Bool: %Bool.type = import_ref Core//prelude/types/bool, Bool, loaded [concrete = constants.%Bool]
// CHECK:STDOUT: %Core.EqWith: %EqWith.type.c2e = import_ref Core//prelude/operators/comparison, EqWith, loaded [concrete = constants.%EqWith.generic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .D = %D.decl
// CHECK:STDOUT: .TestEqual = %TestEqual.decl
// CHECK:STDOUT: .TestNotEqual = %TestNotEqual.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %D.decl: type = class_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: %TestEqual.decl: %TestEqual.type = fn_decl @TestEqual [concrete = constants.%TestEqual] {
// CHECK:STDOUT: %a.patt: %pattern_type.54d = value_binding_pattern a [concrete]
// CHECK:STDOUT: %a.param_patt: %pattern_type.54d = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT: %b.patt: %pattern_type.54d = value_binding_pattern b [concrete]
// CHECK:STDOUT: %b.param_patt: %pattern_type.54d = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc6_29.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc6_29.2: type = converted %Bool.call, %.loc6_29.1 [concrete = bool]
// CHECK:STDOUT: %a.param: %D = value_param call_param0
// CHECK:STDOUT: %D.ref.loc6_17: type = name_ref D, file.%D.decl [concrete = constants.%D]
// CHECK:STDOUT: %a: %D = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %D = value_param call_param1
// CHECK:STDOUT: %D.ref.loc6_23: type = name_ref D, file.%D.decl [concrete = constants.%D]
// CHECK:STDOUT: %b: %D = value_binding b, %b.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %TestNotEqual.decl: %TestNotEqual.type = fn_decl @TestNotEqual [concrete = constants.%TestNotEqual] {
// CHECK:STDOUT: %a.patt: %pattern_type.54d = value_binding_pattern a [concrete]
// CHECK:STDOUT: %a.param_patt: %pattern_type.54d = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT: %b.patt: %pattern_type.54d = value_binding_pattern b [concrete]
// CHECK:STDOUT: %b.param_patt: %pattern_type.54d = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc14_32.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc14_32.2: type = converted %Bool.call, %.loc14_32.1 [concrete = bool]
// CHECK:STDOUT: %a.param: %D = value_param call_param0
// CHECK:STDOUT: %D.ref.loc14_20: type = name_ref D, file.%D.decl [concrete = constants.%D]
// CHECK:STDOUT: %a: %D = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %D = value_param call_param1
// CHECK:STDOUT: %D.ref.loc14_26: type = name_ref D, file.%D.decl [concrete = constants.%D]
// CHECK:STDOUT: %b: %D = value_binding b, %b.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @D {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%D
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @TestEqual(%a.param: %D, %b.param: %D) -> bool {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: %D = name_ref a, %a
// CHECK:STDOUT: %b.ref: %D = name_ref b, %b
// CHECK:STDOUT: return <error> to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @TestNotEqual(%a.param: %D, %b.param: %D) -> bool {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: %D = name_ref a, %a
// CHECK:STDOUT: %b.ref: %D = name_ref b, %b
// CHECK:STDOUT: return <error> to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_no_impl_for_args.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %D: type = class_type @D [concrete]
// CHECK:STDOUT: %EqWith.type.c2e: type = generic_interface_type @EqWith [concrete]
// CHECK:STDOUT: %EqWith.generic: %EqWith.type.c2e = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.831: type = pattern_type bool [concrete]
// CHECK:STDOUT: %EqWith.type.470: type = facet_type <@EqWith, @EqWith(%C)> [concrete]
// CHECK:STDOUT: %EqWith.impl_witness: <witness> = impl_witness @C.as.EqWith.impl.%EqWith.impl_witness_table [concrete]
// CHECK:STDOUT: %pattern_type.224: type = pattern_type %C [concrete]
// CHECK:STDOUT: %Bool.type: type = fn_type @Bool [concrete]
// CHECK:STDOUT: %Bool: %Bool.type = struct_value () [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.Equal.type: type = fn_type @C.as.EqWith.impl.Equal [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.Equal: %C.as.EqWith.impl.Equal.type = struct_value () [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual.type: type = fn_type @C.as.EqWith.impl.NotEqual [concrete]
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual: %C.as.EqWith.impl.NotEqual.type = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type.07d: type = pattern_type %D [concrete]
// CHECK:STDOUT: %TestRhsBad.type: type = fn_type @TestRhsBad [concrete]
// CHECK:STDOUT: %TestRhsBad: %TestRhsBad.type = struct_value () [concrete]
// CHECK:STDOUT: %TestLhsBad.type: type = fn_type @TestLhsBad [concrete]
// CHECK:STDOUT: %TestLhsBad: %TestLhsBad.type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .EqWith = %Core.EqWith
// CHECK:STDOUT: .Bool = %Core.Bool
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.EqWith: %EqWith.type.c2e = import_ref Core//prelude/operators/comparison, EqWith, loaded [concrete = constants.%EqWith.generic]
// CHECK:STDOUT: %Core.Bool: %Bool.type = import_ref Core//prelude/types/bool, Bool, loaded [concrete = constants.%Bool]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .D = %D.decl
// CHECK:STDOUT: .TestRhsBad = %TestRhsBad.decl
// CHECK:STDOUT: .TestLhsBad = %TestLhsBad.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %D.decl: type = class_decl @D [concrete = constants.%D] {} {}
// CHECK:STDOUT: impl_decl @C.as.EqWith.impl [concrete] {} {
// CHECK:STDOUT: %C.ref.loc7_6: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %Core.ref: <namespace> = name_ref Core, imports.%Core [concrete = imports.%Core]
// CHECK:STDOUT: %EqWith.ref: %EqWith.type.c2e = name_ref EqWith, imports.%Core.EqWith [concrete = constants.%EqWith.generic]
// CHECK:STDOUT: %C.ref.loc7_23: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %EqWith.type: type = facet_type <@EqWith, @EqWith(constants.%C)> [concrete = constants.%EqWith.type.470]
// CHECK:STDOUT: }
// CHECK:STDOUT: %TestRhsBad.decl: %TestRhsBad.type = fn_decl @TestRhsBad [concrete = constants.%TestRhsBad] {
// CHECK:STDOUT: %a.patt: %pattern_type.224 = value_binding_pattern a [concrete]
// CHECK:STDOUT: %a.param_patt: %pattern_type.224 = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT: %b.patt: %pattern_type.07d = value_binding_pattern b [concrete]
// CHECK:STDOUT: %b.param_patt: %pattern_type.07d = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc12_30.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc12_30.2: type = converted %Bool.call, %.loc12_30.1 [concrete = bool]
// CHECK:STDOUT: %a.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %a: %C = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %D = value_param call_param1
// CHECK:STDOUT: %D.ref: type = name_ref D, file.%D.decl [concrete = constants.%D]
// CHECK:STDOUT: %b: %D = value_binding b, %b.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %TestLhsBad.decl: %TestLhsBad.type = fn_decl @TestLhsBad [concrete = constants.%TestLhsBad] {
// CHECK:STDOUT: %a.patt: %pattern_type.07d = value_binding_pattern a [concrete]
// CHECK:STDOUT: %a.param_patt: %pattern_type.07d = value_param_pattern %a.patt, call_param0 [concrete]
// CHECK:STDOUT: %b.patt: %pattern_type.224 = value_binding_pattern b [concrete]
// CHECK:STDOUT: %b.param_patt: %pattern_type.224 = value_param_pattern %b.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc20_30.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc20_30.2: type = converted %Bool.call, %.loc20_30.1 [concrete = bool]
// CHECK:STDOUT: %a.param: %D = value_param call_param0
// CHECK:STDOUT: %D.ref: type = name_ref D, file.%D.decl [concrete = constants.%D]
// CHECK:STDOUT: %a: %D = value_binding a, %a.param
// CHECK:STDOUT: %b.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %b: %C = value_binding b, %b.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.EqWith.impl: %C.ref.loc7_6 as %EqWith.type {
// CHECK:STDOUT: %C.as.EqWith.impl.Equal.decl: %C.as.EqWith.impl.Equal.type = fn_decl @C.as.EqWith.impl.Equal [concrete = constants.%C.as.EqWith.impl.Equal] {
// CHECK:STDOUT: %self.patt: %pattern_type.224 = value_binding_pattern self [concrete]
// CHECK:STDOUT: %self.param_patt: %pattern_type.224 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT: %other.patt: %pattern_type.224 = value_binding_pattern other [concrete]
// CHECK:STDOUT: %other.param_patt: %pattern_type.224 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc8_34.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc8_34.2: type = converted %Bool.call, %.loc8_34.1 [concrete = bool]
// CHECK:STDOUT: %self.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc8_18: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %self: %C = value_binding self, %self.param
// CHECK:STDOUT: %other.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref.loc8_28: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %other: %C = value_binding other, %other.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.as.EqWith.impl.NotEqual.decl: %C.as.EqWith.impl.NotEqual.type = fn_decl @C.as.EqWith.impl.NotEqual [concrete = constants.%C.as.EqWith.impl.NotEqual] {
// CHECK:STDOUT: %self.patt: %pattern_type.224 = value_binding_pattern self [concrete]
// CHECK:STDOUT: %self.param_patt: %pattern_type.224 = value_param_pattern %self.patt, call_param0 [concrete]
// CHECK:STDOUT: %other.patt: %pattern_type.224 = value_binding_pattern other [concrete]
// CHECK:STDOUT: %other.param_patt: %pattern_type.224 = value_param_pattern %other.patt, call_param1 [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.831 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.831 = out_param_pattern %return.patt, call_param2 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Bool.call: init type = call constants.%Bool() [concrete = bool]
// CHECK:STDOUT: %.loc9_37.1: type = value_of_initializer %Bool.call [concrete = bool]
// CHECK:STDOUT: %.loc9_37.2: type = converted %Bool.call, %.loc9_37.1 [concrete = bool]
// CHECK:STDOUT: %self.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc9_21: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %self: %C = value_binding self, %self.param
// CHECK:STDOUT: %other.param: %C = value_param call_param1
// CHECK:STDOUT: %C.ref.loc9_31: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %other: %C = value_binding other, %other.param
// CHECK:STDOUT: %return.param: ref bool = out_param call_param2
// CHECK:STDOUT: %return: ref bool = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %EqWith.impl_witness_table = impl_witness_table (%C.as.EqWith.impl.Equal.decl, %C.as.EqWith.impl.NotEqual.decl), @C.as.EqWith.impl [concrete]
// CHECK:STDOUT: %EqWith.impl_witness: <witness> = impl_witness %EqWith.impl_witness_table [concrete = constants.%EqWith.impl_witness]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .C = <poisoned>
// CHECK:STDOUT: .Equal = %C.as.EqWith.impl.Equal.decl
// CHECK:STDOUT: .NotEqual = %C.as.EqWith.impl.NotEqual.decl
// CHECK:STDOUT: witness = %EqWith.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @D {
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%empty_struct_type [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%D
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.as.EqWith.impl.Equal(%self.param: %C, %other.param: %C) -> bool;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.as.EqWith.impl.NotEqual(%self.param: %C, %other.param: %C) -> bool;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @TestRhsBad(%a.param: %C, %b.param: %D) -> bool {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: %C = name_ref a, %a
// CHECK:STDOUT: %b.ref: %D = name_ref b, %b
// CHECK:STDOUT: return <error> to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @TestLhsBad(%a.param: %D, %b.param: %C) -> bool {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref: %D = name_ref a, %a
// CHECK:STDOUT: %b.ref: %C = name_ref b, %b
// CHECK:STDOUT: return <error> to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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