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carbon-lang/toolchain/check/testdata/class/import_struct_cycle.carbon
T
Richard Smith cefa0397bb More fixes to package and library fingerprinting. (#7297) 
Fix import logic to make all imported packages be children of the
`NameScopeId::Package` scope. Previously, indirectly-imported packages
would end up as children of their importing package's scope, which
resulted in them not being treated as packages at all, and in particular
not being fingerprinted as packages.

Fixing that caused a failure in the fingerprinting logic as we started
to encounter packages with no correspoding import scopes. Instead of
looking for import scopes, use a simpler mechanism to map packages to
their package names, and clean up.

Unfortunately the latter change churns all the fingerprints again :(
Hopefully this is the last time for a while.
2026-06-04 17:41:46 +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_struct_cycle.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/import_struct_cycle.carbon
// --- a.carbon
library "[[@TEST_NAME]]";
class Cycle;
var a: {.b: Cycle*};
class Cycle {
// The type here is equivalent to the `a` above, but on import can be resolved first.
var c: {.b: Cycle*};
}
// --- b.carbon
library "[[@TEST_NAME]]";
import library "a";
fn Run() {
a.b = (*a.b).c.b;
}
// 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: %struct_type.b: type = struct_type {.b: %ptr} [concrete]
// CHECK:STDOUT: %pattern_type.38c: type = pattern_type %struct_type.b [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.type: type = facet_type <@DefaultOrUnformed> [concrete]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.type.150: type = fn_type @T.as.DefaultOrUnformed.impl.Op, @T.as.DefaultOrUnformed.impl(%T.67d) [symbolic]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.53a: %T.as.DefaultOrUnformed.impl.Op.type.150 = struct_value () [symbolic]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness.b8b: <witness> = impl_witness imports.%DefaultOrUnformed.impl_witness_table.374, @T.as.DefaultOrUnformed.impl(%struct_type.b) [concrete]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.type.49c: type = fn_type @T.as.DefaultOrUnformed.impl.Op, @T.as.DefaultOrUnformed.impl(%struct_type.b) [concrete]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.74d: %T.as.DefaultOrUnformed.impl.Op.type.49c = struct_value () [concrete]
// CHECK:STDOUT: %DefaultOrUnformed.facet: %DefaultOrUnformed.type = facet_value %struct_type.b, (%DefaultOrUnformed.impl_witness.b8b) [concrete]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.specific_fn: <specific function> = specific_function %T.as.DefaultOrUnformed.impl.Op.74d, @T.as.DefaultOrUnformed.impl.Op(%struct_type.b) [concrete]
// CHECK:STDOUT: %Cycle.elem: type = unbound_element_type %Cycle, %struct_type.b [concrete]
// CHECK:STDOUT: %struct_type.c: type = struct_type {.c: %struct_type.b} [concrete]
// CHECK:STDOUT: %complete_type.663: <witness> = complete_type_witness %struct_type.c [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .DefaultOrUnformed = %Core.DefaultOrUnformed
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.DefaultOrUnformed: type = import_ref Core//prelude/parts/default, DefaultOrUnformed, loaded [concrete = constants.%DefaultOrUnformed.type]
// CHECK:STDOUT: %Core.import_ref.cc8: @T.as.DefaultOrUnformed.impl.%T.as.DefaultOrUnformed.impl.Op.type (%T.as.DefaultOrUnformed.impl.Op.type.150) = import_ref Core//prelude/parts/default, loc{{\d+_\d+}}, loaded [symbolic = @T.as.DefaultOrUnformed.impl.%T.as.DefaultOrUnformed.impl.Op (constants.%T.as.DefaultOrUnformed.impl.Op.53a)]
// CHECK:STDOUT: %DefaultOrUnformed.impl_witness_table.374 = impl_witness_table (%Core.import_ref.cc8), @T.as.DefaultOrUnformed.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .Cycle = %Cycle.decl.loc4
// CHECK:STDOUT: .a = %a
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Cycle.decl.loc4: type = class_decl @Cycle [concrete = constants.%Cycle] {} {}
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %a.patt: %pattern_type.38c = ref_binding_pattern a [concrete]
// CHECK:STDOUT: %a.var_patt: %pattern_type.38c = var_pattern %a.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a.var: ref %struct_type.b = var %a.var_patt [concrete]
// CHECK:STDOUT: %.loc6: type = splice_block %struct_type.b [concrete = constants.%struct_type.b] {
// CHECK:STDOUT: %Cycle.ref: type = name_ref Cycle, %Cycle.decl.loc4 [concrete = constants.%Cycle]
// CHECK:STDOUT: %ptr: type = ptr_type %Cycle.ref [concrete = constants.%ptr]
// CHECK:STDOUT: %struct_type.b: type = struct_type {.b: %ptr} [concrete = constants.%struct_type.b]
// CHECK:STDOUT: }
// CHECK:STDOUT: %a: ref %struct_type.b = ref_binding a, %a.var [concrete = %a.var]
// CHECK:STDOUT: %Cycle.decl.loc8: type = class_decl @Cycle [concrete = constants.%Cycle] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Cycle {
// CHECK:STDOUT: %.loc10: %Cycle.elem = field_decl c, element0 [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness constants.%struct_type.c [concrete = constants.%complete_type.663]
// CHECK:STDOUT: complete_type_witness = %complete_type
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = constants.%Cycle
// CHECK:STDOUT: .Cycle = <poisoned>
// CHECK:STDOUT: .c = %.loc10
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %DefaultOrUnformed.facet: %DefaultOrUnformed.type = facet_value constants.%struct_type.b, (constants.%DefaultOrUnformed.impl_witness.b8b) [concrete = constants.%DefaultOrUnformed.facet]
// CHECK:STDOUT: %.loc6_20.1: %DefaultOrUnformed.type = converted constants.%struct_type.b, %DefaultOrUnformed.facet [concrete = constants.%DefaultOrUnformed.facet]
// CHECK:STDOUT: %as_type: type = facet_access_type %.loc6_20.1 [concrete = constants.%struct_type.b]
// CHECK:STDOUT: %.loc6_20.2: type = converted %.loc6_20.1, %as_type [concrete = constants.%struct_type.b]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.specific_fn: <specific function> = specific_function constants.%T.as.DefaultOrUnformed.impl.Op.74d, @T.as.DefaultOrUnformed.impl.Op(constants.%struct_type.b) [concrete = constants.%T.as.DefaultOrUnformed.impl.Op.specific_fn]
// CHECK:STDOUT: %T.as.DefaultOrUnformed.impl.Op.call: init %struct_type.b = call %T.as.DefaultOrUnformed.impl.Op.specific_fn()
// CHECK:STDOUT: assign file.%a.var, %T.as.DefaultOrUnformed.impl.Op.call
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- b.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Run.type: type = fn_type @Run [concrete]
// CHECK:STDOUT: %Run: %Run.type = struct_value () [concrete]
// CHECK:STDOUT: %Cycle: type = class_type @Cycle [concrete]
// CHECK:STDOUT: %ptr.5cd: type = ptr_type %Cycle [concrete]
// CHECK:STDOUT: %struct_type.b: type = struct_type {.b: %ptr.5cd} [concrete]
// CHECK:STDOUT: %struct_type.c: type = struct_type {.c: %struct_type.b} [concrete]
// CHECK:STDOUT: %complete_type.663: <witness> = complete_type_witness %struct_type.c [concrete]
// CHECK:STDOUT: %pattern_type.38c: type = pattern_type %struct_type.b [concrete]
// CHECK:STDOUT: %.d98: ref %ptr.5cd = struct_access imports.%a.var, element0 [concrete]
// CHECK:STDOUT: %Cycle.elem: type = unbound_element_type %Cycle, %struct_type.b [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.ff5: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%T.67d) [symbolic]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.ce9: %ptr.as.Copy.impl.Op.type.ff5 = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.fd3: <witness> = impl_witness imports.%Copy.impl_witness_table.4f1, @ptr.as.Copy.impl(%Cycle) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.type.088: type = fn_type @ptr.as.Copy.impl.Op, @ptr.as.Copy.impl(%Cycle) [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.fb2: %ptr.as.Copy.impl.Op.type.088 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet: %Copy.type = facet_value %ptr.5cd, (%Copy.impl_witness.fd3) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.783: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet) [concrete]
// CHECK:STDOUT: %.00d: type = fn_type_with_self_type %Copy.WithSelf.Op.type.783, %Copy.facet [concrete]
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %ptr.as.Copy.impl.Op.fb2, @ptr.as.Copy.impl.Op(%Cycle) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Main.Cycle = import_ref Main//a, Cycle, unloaded
// CHECK:STDOUT: %Main.a: ref %struct_type.b = import_ref Main//a, a, loaded [concrete = %a.var]
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Copy = %Core.Copy
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Main.import_ref.281: <witness> = import_ref Main//a, loc11_1, loaded [concrete = constants.%complete_type.663]
// CHECK:STDOUT: %Main.import_ref.3b0 = import_ref Main//a, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: %Main.import_ref.697: %Cycle.elem = import_ref Main//a, loc10_8, loaded [concrete = %.ec0]
// CHECK:STDOUT: %a.patt: %pattern_type.38c = ref_binding_pattern a [concrete]
// CHECK:STDOUT: %a.var_patt: %pattern_type.38c = var_pattern %a.patt [concrete]
// CHECK:STDOUT: %a.var: ref %struct_type.b = var %a.var_patt [concrete]
// CHECK:STDOUT: %.ec0: %Cycle.elem = field_decl c, element0 [concrete]
// CHECK:STDOUT: %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT: %Core.import_ref.e5f: @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op.type (%ptr.as.Copy.impl.Op.type.ff5) = import_ref Core//prelude/parts/copy, loc{{\d+_\d+}}, loaded [symbolic = @ptr.as.Copy.impl.%ptr.as.Copy.impl.Op (constants.%ptr.as.Copy.impl.Op.ce9)]
// CHECK:STDOUT: %Copy.impl_witness_table.4f1 = impl_witness_table (%Core.import_ref.e5f), @ptr.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Cycle = imports.%Main.Cycle
// CHECK:STDOUT: .a = imports.%Main.a
// 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.281
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%Main.import_ref.3b0
// CHECK:STDOUT: .c = imports.%Main.import_ref.697
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Run() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %a.ref.loc7_3: ref %struct_type.b = name_ref a, imports.%Main.a [concrete = imports.%a.var]
// CHECK:STDOUT: %.loc7_4: ref %ptr.5cd = struct_access %a.ref.loc7_3, element0 [concrete = constants.%.d98]
// CHECK:STDOUT: %a.ref.loc7_11: ref %struct_type.b = name_ref a, imports.%Main.a [concrete = imports.%a.var]
// CHECK:STDOUT: %.loc7_12.1: ref %ptr.5cd = struct_access %a.ref.loc7_11, element0 [concrete = constants.%.d98]
// CHECK:STDOUT: %.loc7_12.2: %ptr.5cd = acquire_value %.loc7_12.1
// CHECK:STDOUT: %.loc7_10: ref %Cycle = deref %.loc7_12.2
// CHECK:STDOUT: %c.ref: %Cycle.elem = name_ref c, imports.%Main.import_ref.697 [concrete = imports.%.ec0]
// CHECK:STDOUT: %.loc7_15: ref %struct_type.b = class_element_access %.loc7_10, element0
// CHECK:STDOUT: %.loc7_17.1: ref %ptr.5cd = struct_access %.loc7_15, element0
// CHECK:STDOUT: %.loc7_17.2: %ptr.5cd = acquire_value %.loc7_17.1
// CHECK:STDOUT: %impl.elem0: %.00d = impl_witness_access constants.%Copy.impl_witness.fd3, element0 [concrete = constants.%ptr.as.Copy.impl.Op.fb2]
// CHECK:STDOUT: %bound_method.loc7_17.1: <bound method> = bound_method %.loc7_17.2, %impl.elem0
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @ptr.as.Copy.impl.Op(constants.%Cycle) [concrete = constants.%ptr.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc7_17.2: <bound method> = bound_method %.loc7_17.2, %specific_fn
// CHECK:STDOUT: %ptr.as.Copy.impl.Op.call: init %ptr.5cd = call %bound_method.loc7_17.2(%.loc7_17.2)
// CHECK:STDOUT: assign %.loc7_4, %ptr.as.Copy.impl.Op.call
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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