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carbon-lang/toolchain/check/testdata/class/self/fail_ref_self.carbon
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Richard Smith 05cc09daca Fix cross-package signature mismatches. (#7232) 
Fixes link failures when referencing a symbol involving a fingerprint
from a different package.

Previously we included the `Namespace`'s `import_id` as part of its
fingerprint, which caused local and imported namespaces to get different
fingerprints. We now store the `import_id` on the `NameScope` instead of
on the `Namespace` inst to avoid this problem.

Also, when we reach a package-level `NameScopeId`, consistently
fingerprint it as a (package name, library name) pair. Previously the
fingerprinting depended on whether it was imported or not, as an
imported `NameScopeId` had a parent scope (the current package). We need
to include the library name here so that private entities with the same
name in different libraries have different fingerprints.
2026-05-21 00:02:29 +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/self/fail_ref_self.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/class/self/fail_ref_self.carbon
class Class {
fn F[ref self: Self]();
}
fn Make() -> Class;
fn F(c: Class, p: Class*) {
// CHECK:STDERR: fail_ref_self.carbon:[[@LINE+7]]:3: error: value expression passed to reference parameter [ValueForRefParam]
// CHECK:STDERR: c.F();
// CHECK:STDERR: ^
// CHECK:STDERR: fail_ref_self.carbon:[[@LINE-9]]:8: note: initializing function parameter [InCallToFunctionParam]
// CHECK:STDERR: fn F[ref self: Self]();
// CHECK:STDERR: ^~~~~~~~~~~~~~
// CHECK:STDERR:
c.F();
// This call is OK.
(*p).F();
// So is this one.
Make().F();
}
// CHECK:STDOUT: --- fail_ref_self.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Class: type = class_type @Class [concrete]
// CHECK:STDOUT: %pattern_type.138: type = pattern_type %Class [concrete]
// CHECK:STDOUT: %Class.F.type: type = fn_type @Class.F [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Class.F: %Class.F.type = struct_value () [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %.23c: Core.Form = init_form %Class [concrete]
// CHECK:STDOUT: %Make.type: type = fn_type @Make [concrete]
// CHECK:STDOUT: %Make: %Make.type = struct_value () [concrete]
// CHECK:STDOUT: %ptr.bd7: type = ptr_type %Class [concrete]
// CHECK:STDOUT: %pattern_type.9b1: type = pattern_type %ptr.bd7 [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %Destroy.type: type = facet_type <@Destroy> [concrete]
// CHECK:STDOUT: %Destroy.Op.type.af7ec0.2: type = fn_type @Destroy.Op.loc35_8.2 [concrete]
// CHECK:STDOUT: %Destroy.Op.1dc86d.2: %Destroy.Op.type.af7ec0.2 = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// 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: %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: .Core = imports.%Core
// CHECK:STDOUT: .Class = %Class.decl
// CHECK:STDOUT: .Make = %Make.decl
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Class.decl: type = class_decl @Class [concrete = constants.%Class] {} {}
// CHECK:STDOUT: %Make.decl: %Make.type = fn_decl @Make [concrete = constants.%Make] {
// CHECK:STDOUT: %return.param_patt: %pattern_type.138 = out_param_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.138 = return_slot_pattern %return.param_patt, %Class.ref [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %Class.ref: type = name_ref Class, file.%Class.decl [concrete = constants.%Class]
// CHECK:STDOUT: %.loc19: Core.Form = init_form %Class.ref [concrete = constants.%.23c]
// CHECK:STDOUT: %return.param: ref %Class = out_param call_param0
// CHECK:STDOUT: %return: ref %Class = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %c.param_patt: %pattern_type.138 = value_param_pattern [concrete]
// CHECK:STDOUT: %c.patt: %pattern_type.138 = at_binding_pattern c, %c.param_patt [concrete]
// CHECK:STDOUT: %p.param_patt: %pattern_type.9b1 = value_param_pattern [concrete]
// CHECK:STDOUT: %p.patt: %pattern_type.9b1 = at_binding_pattern p, %p.param_patt [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %c.param: %Class = value_param call_param0
// CHECK:STDOUT: %Class.ref.loc21_9: type = name_ref Class, file.%Class.decl [concrete = constants.%Class]
// CHECK:STDOUT: %c: %Class = value_binding c, %c.param
// CHECK:STDOUT: %p.param: %ptr.bd7 = value_param call_param1
// CHECK:STDOUT: %.loc21: type = splice_block %ptr [concrete = constants.%ptr.bd7] {
// CHECK:STDOUT: %Class.ref.loc21_19: type = name_ref Class, file.%Class.decl [concrete = constants.%Class]
// CHECK:STDOUT: %ptr: type = ptr_type %Class.ref.loc21_19 [concrete = constants.%ptr.bd7]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %ptr.bd7 = value_binding p, %p.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @Class {
// CHECK:STDOUT: %Class.F.decl: %Class.F.type = fn_decl @Class.F [concrete = constants.%Class.F] {
// CHECK:STDOUT: %self.param_patt: %pattern_type.138 = ref_param_pattern [concrete]
// CHECK:STDOUT: %self.patt: %pattern_type.138 = at_binding_pattern self, %self.param_patt [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %self.param: ref %Class = ref_param call_param0
// CHECK:STDOUT: %Self.ref: type = name_ref Self, constants.%Class [concrete = constants.%Class]
// CHECK:STDOUT: %self: ref %Class = ref_binding self, %self.param
// CHECK:STDOUT: }
// 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.%Class
// CHECK:STDOUT: .F = %Class.F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Class.F(%self.param: ref %Class);
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Make() -> out %return.param: %Class;
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%c.param: %Class, %p.param: %ptr.bd7) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %c.ref: %Class = name_ref c, %c
// CHECK:STDOUT: %F.ref.loc29: %Class.F.type = name_ref F, @Class.%Class.F.decl [concrete = constants.%Class.F]
// CHECK:STDOUT: %Class.F.bound.loc29: <bound method> = bound_method %c.ref, %F.ref.loc29
// CHECK:STDOUT: %Class.F.call.loc29: init %empty_tuple.type = call %Class.F.bound.loc29(<error>)
// CHECK:STDOUT: %p.ref: %ptr.bd7 = name_ref p, %p
// CHECK:STDOUT: %.loc32: ref %Class = deref %p.ref
// CHECK:STDOUT: %F.ref.loc32: %Class.F.type = name_ref F, @Class.%Class.F.decl [concrete = constants.%Class.F]
// CHECK:STDOUT: %Class.F.bound.loc32: <bound method> = bound_method %.loc32, %F.ref.loc32
// CHECK:STDOUT: %Class.F.call.loc32: init %empty_tuple.type = call %Class.F.bound.loc32(%.loc32)
// CHECK:STDOUT: %Make.ref: %Make.type = name_ref Make, file.%Make.decl [concrete = constants.%Make]
// CHECK:STDOUT: %.loc35_8.1: ref %Class = temporary_storage
// CHECK:STDOUT: %Make.call: init %Class to %.loc35_8.1 = call %Make.ref()
// CHECK:STDOUT: %.loc35_8.2: ref %Class = temporary %.loc35_8.1, %Make.call
// CHECK:STDOUT: %F.ref.loc35: %Class.F.type = name_ref F, @Class.%Class.F.decl [concrete = constants.%Class.F]
// CHECK:STDOUT: %Class.F.bound.loc35: <bound method> = bound_method %.loc35_8.2, %F.ref.loc35
// CHECK:STDOUT: %Class.F.call.loc35: init %empty_tuple.type = call %Class.F.bound.loc35(%.loc35_8.2)
// CHECK:STDOUT: %Destroy.Op.bound: <bound method> = bound_method %.loc35_8.2, constants.%Destroy.Op.1dc86d.2
// CHECK:STDOUT: %Destroy.Op.call: init %empty_tuple.type = call %Destroy.Op.bound(%.loc35_8.2)
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc35_8.1(%self.param: ref %empty_struct_type) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Destroy.Op.loc35_8.2(%self.param: ref %Class) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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