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carbon-lang/toolchain/check/testdata/impl/self_in_class.carbon
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Dana Jansens fe020ee08b Make FacetAccessType evaluate to SymbolicBindingType for type-of a BindSymbolicName (#6115) 
The SymbolicBindingType refers to the type value that will be
substituted in for the BindSymbolicName, but holds onto the EntityNameId
from the BindSymbolicName instead of (or in addition to, for now) the
instruction.

The EntityNameId will be used to look in the ScopeStack to find the
witnesses either from the BindSymbolicName instruction, or other
instructions that specify `impls` constraints against the EntityName.

This will allow us to have the `T` in `I(T)` resolve to a `.Self`
reference in the type so that we get type equality with the binding's
type: `T:! I(.Self)`.
2025-10-06 18:56:43 +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/none.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/impl/self_in_class.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/self_in_class.carbon
interface DefaultConstructible {
fn Make() -> Self;
}
class C {}
class A {
impl C as DefaultConstructible {
// `Self` here refers to `C`, not `A`.
// TODO: Revisit this once #3714 is resolved.
fn Make() -> Self { return {}; }
}
}
// CHECK:STDOUT: --- self_in_class.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %DefaultConstructible.type: type = facet_type <@DefaultConstructible> [concrete]
// CHECK:STDOUT: %Self: %DefaultConstructible.type = bind_symbolic_name Self, 0 [symbolic]
// CHECK:STDOUT: %Self.binding.as_type: type = symbolic_binding_type Self, 0, %Self [symbolic]
// CHECK:STDOUT: %pattern_type.d52: type = pattern_type %Self.binding.as_type [symbolic]
// CHECK:STDOUT: %DefaultConstructible.Make.type: type = fn_type @DefaultConstructible.Make [concrete]
// CHECK:STDOUT: %DefaultConstructible.Make: %DefaultConstructible.Make.type = struct_value () [concrete]
// CHECK:STDOUT: %DefaultConstructible.assoc_type: type = assoc_entity_type @DefaultConstructible [concrete]
// CHECK:STDOUT: %assoc0: %DefaultConstructible.assoc_type = assoc_entity element0, @DefaultConstructible.%DefaultConstructible.Make.decl [concrete]
// 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: %A: type = class_type @A [concrete]
// CHECK:STDOUT: %DefaultConstructible.impl_witness: <witness> = impl_witness @A.%DefaultConstructible.impl_witness_table [concrete]
// CHECK:STDOUT: %pattern_type.c48: type = pattern_type %C [concrete]
// CHECK:STDOUT: %C.as.DefaultConstructible.impl.Make.type: type = fn_type @C.as.DefaultConstructible.impl.Make [concrete]
// CHECK:STDOUT: %C.as.DefaultConstructible.impl.Make: %C.as.DefaultConstructible.impl.Make.type = struct_value () [concrete]
// CHECK:STDOUT: %DefaultConstructible.facet: %DefaultConstructible.type = facet_value %C, (%DefaultConstructible.impl_witness) [concrete]
// CHECK:STDOUT: %C.val: %C = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .DefaultConstructible = %DefaultConstructible.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .A = %A.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %DefaultConstructible.decl: type = interface_decl @DefaultConstructible [concrete = constants.%DefaultConstructible.type] {} {}
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %A.decl: type = class_decl @A [concrete = constants.%A] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @DefaultConstructible {
// CHECK:STDOUT: %Self: %DefaultConstructible.type = bind_symbolic_name Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %DefaultConstructible.Make.decl: %DefaultConstructible.Make.type = fn_decl @DefaultConstructible.Make [concrete = constants.%DefaultConstructible.Make] {
// CHECK:STDOUT: %return.patt: @DefaultConstructible.Make.%pattern_type (%pattern_type.d52) = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: @DefaultConstructible.Make.%pattern_type (%pattern_type.d52) = out_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Self.ref: %DefaultConstructible.type = name_ref Self, @DefaultConstructible.%Self [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.as_type: type = facet_access_type %Self.ref [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type)]
// CHECK:STDOUT: %.loc16: type = converted %Self.ref, %Self.as_type [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type)]
// CHECK:STDOUT: %return.param: ref @DefaultConstructible.Make.%Self.binding.as_type (%Self.binding.as_type) = out_param call_param0
// CHECK:STDOUT: %return: ref @DefaultConstructible.Make.%Self.binding.as_type (%Self.binding.as_type) = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %assoc0: %DefaultConstructible.assoc_type = assoc_entity element0, %DefaultConstructible.Make.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .Make = %assoc0
// CHECK:STDOUT: witness = (%DefaultConstructible.Make.decl)
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.DefaultConstructible.impl: %C.ref as %DefaultConstructible.ref {
// CHECK:STDOUT: %C.as.DefaultConstructible.impl.Make.decl: %C.as.DefaultConstructible.impl.Make.type = fn_decl @C.as.DefaultConstructible.impl.Make [concrete = constants.%C.as.DefaultConstructible.impl.Make] {
// CHECK:STDOUT: %return.patt: %pattern_type.c48 = return_slot_pattern [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.c48 = out_param_pattern %return.patt, call_param0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Self.ref: type = name_ref Self, @C.as.DefaultConstructible.impl.%C.ref [concrete = constants.%C]
// CHECK:STDOUT: %return.param: ref %C = out_param call_param0
// CHECK:STDOUT: %return: ref %C = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Make = %C.as.DefaultConstructible.impl.Make.decl
// CHECK:STDOUT: witness = @A.%DefaultConstructible.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 @A {
// CHECK:STDOUT: impl_decl @C.as.DefaultConstructible.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %DefaultConstructible.ref: type = name_ref DefaultConstructible, file.%DefaultConstructible.decl [concrete = constants.%DefaultConstructible.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %DefaultConstructible.impl_witness_table = impl_witness_table (@C.as.DefaultConstructible.impl.%C.as.DefaultConstructible.impl.Make.decl), @C.as.DefaultConstructible.impl [concrete]
// CHECK:STDOUT: %DefaultConstructible.impl_witness: <witness> = impl_witness %DefaultConstructible.impl_witness_table [concrete = constants.%DefaultConstructible.impl_witness]
// 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.%A
// CHECK:STDOUT: .C = <poisoned>
// CHECK:STDOUT: .DefaultConstructible = <poisoned>
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @DefaultConstructible.Make(@DefaultConstructible.%Self: %DefaultConstructible.type) {
// CHECK:STDOUT: %Self: %DefaultConstructible.type = bind_symbolic_name Self, 0 [symbolic = %Self (constants.%Self)]
// CHECK:STDOUT: %Self.binding.as_type: type = symbolic_binding_type Self, 0, %Self [symbolic = %Self.binding.as_type (constants.%Self.binding.as_type)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Self.binding.as_type [symbolic = %pattern_type (constants.%pattern_type.d52)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() -> @DefaultConstructible.Make.%Self.binding.as_type (%Self.binding.as_type);
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.as.DefaultConstructible.impl.Make() -> %return.param: %C {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc25_33.1: %empty_struct_type = struct_literal ()
// CHECK:STDOUT: %.loc25_33.2: init %C = class_init (), %return [concrete = constants.%C.val]
// CHECK:STDOUT: %.loc25_34: init %C = converted %.loc25_33.1, %.loc25_33.2 [concrete = constants.%C.val]
// CHECK:STDOUT: return %.loc25_34 to %return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @DefaultConstructible.Make(constants.%Self) {
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %Self.binding.as_type => constants.%Self.binding.as_type
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.d52
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @DefaultConstructible.Make(constants.%DefaultConstructible.facet) {
// CHECK:STDOUT: %Self => constants.%DefaultConstructible.facet
// CHECK:STDOUT: %Self.binding.as_type => constants.%C
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.c48
// CHECK:STDOUT: }
// CHECK:STDOUT:
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