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carbon-lang/toolchain/check/testdata/class/import_member_cycle.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/convert.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/class/import_member_cycle.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/import_member_cycle.carbon
// --- a.carbon
library "[[@TEST_NAME]]";
class Cycle {
var a: Cycle*;
}
// --- b.carbon
library "[[@TEST_NAME]]";
import library "a";
fn Run() {
var a: Cycle*;
}
// CHECK:STDOUT: --- a.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Cycle: type = class_type @Cycle [concrete]
// CHECK:STDOUT: %ptr: type = ptr_type %Cycle [concrete]
// CHECK:STDOUT: %Cycle.elem: type = unbound_element_type %Cycle, %ptr [concrete]
// CHECK:STDOUT: %struct_type.a: type = struct_type {.a: %ptr} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %struct_type.a [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .Cycle = %Cycle.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Cycle.decl: type = class_decl @Cycle [concrete = constants.%Cycle] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Cycle {
// CHECK:STDOUT: %Cycle.ref: type = name_ref Cycle, file.%Cycle.decl [concrete = constants.%Cycle]
// CHECK:STDOUT: %ptr: type = ptr_type %Cycle.ref [concrete = constants.%ptr]
// CHECK:STDOUT: %.loc5: %Cycle.elem = field_decl a, element0 [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%struct_type.a [concrete = constants.%complete_type]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%Cycle
// CHECK:STDOUT: .Cycle = <poisoned>
// CHECK:STDOUT: .a = %.loc5
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- b.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Run.type: type = fn_type @Run [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Run: %Run.type = struct_value () [concrete]
// CHECK:STDOUT: %Cycle: type = class_type @Cycle [concrete]
// CHECK:STDOUT: %ptr.257: type = ptr_type %Cycle [concrete]
// CHECK:STDOUT: %struct_type.a: type = struct_type {.a: %ptr.257} [concrete]
// CHECK:STDOUT: %complete_type.e4b: <witness> = complete_type_witness %struct_type.a [concrete]
// CHECK:STDOUT: %pattern_type.d3d: type = pattern_type %ptr.257 [concrete]
// CHECK:STDOUT: %Destroy.type: type = facet_type <@Destroy> [concrete]
// CHECK:STDOUT: %type_where: type = facet_type <type where .Self impls <CanDestroy>> [concrete]
// CHECK:STDOUT: %facet_value: %type_where = facet_value %ptr.257, () [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.e87: type = fn_type @DestroyT.binding.as_type.as.Destroy.impl.Op, @DestroyT.binding.as_type.as.Destroy.impl(%facet_value) [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.d80: %DestroyT.binding.as_type.as.Destroy.impl.Op.type.e87 = struct_value () [concrete]
// CHECK:STDOUT: %ptr.d80: type = ptr_type %ptr.257 [concrete]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn: <specific function> = specific_function %DestroyT.binding.as_type.as.Destroy.impl.Op.d80, @DestroyT.binding.as_type.as.Destroy.impl.Op(%facet_value) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Main.Cycle: type = import_ref Main//a, Cycle, loaded [concrete = constants.%Cycle]
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Destroy = %Core.Destroy
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Main.import_ref.72d: <witness> = import_ref Main//a, loc6_1, loaded [concrete = constants.%complete_type.e4b]
// CHECK:STDOUT: %Main.import_ref.3a6 = import_ref Main//a, inst{{\d+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.4e0 = import_ref Main//a, loc5_8, unloaded
// CHECK:STDOUT: %Core.Destroy: type = import_ref Core//prelude/parts/destroy, Destroy, loaded [concrete = constants.%Destroy.type]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Cycle = imports.%Main.Cycle
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .Run = %Run.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %default.import = import <none>
// CHECK:STDOUT: %Run.decl: %Run.type = fn_decl @Run [concrete = constants.%Run] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Cycle [from "a.carbon"] {
// CHECK:STDOUT: complete_type_witness = imports.%Main.import_ref.72d
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%Main.import_ref.3a6
// CHECK:STDOUT: .a = imports.%Main.import_ref.4e0
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Run() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.d3d = binding_pattern a [concrete]
// CHECK:STDOUT: %a.var_patt: %pattern_type.d3d = var_pattern %a.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a.var: ref %ptr.257 = var %a.var_patt
// CHECK:STDOUT: %.loc7_15: type = splice_block %ptr [concrete = constants.%ptr.257] {
// CHECK:STDOUT: %Cycle.ref: type = name_ref Cycle, imports.%Main.Cycle [concrete = constants.%Cycle]
// CHECK:STDOUT: %ptr: type = ptr_type %Cycle.ref [concrete = constants.%ptr.257]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: ref %ptr.257 = bind_name a, %a.var
// CHECK:STDOUT: %facet_value: %type_where = facet_value constants.%ptr.257, () [concrete = constants.%facet_value]
// CHECK:STDOUT: %.loc7_3: %type_where = converted constants.%ptr.257, %facet_value [concrete = constants.%facet_value]
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.bound: <bound method> = bound_method %a.var, constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.d80
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn: <specific function> = specific_function constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.d80, @DestroyT.binding.as_type.as.Destroy.impl.Op(constants.%facet_value) [concrete = constants.%DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %a.var, %DestroyT.binding.as_type.as.Destroy.impl.Op.specific_fn
// CHECK:STDOUT: %addr: %ptr.d80 = addr_of %a.var
// CHECK:STDOUT: %DestroyT.binding.as_type.as.Destroy.impl.Op.call: init %empty_tuple.type = call %bound_method(%addr)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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