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carbon-lang/toolchain/check/testdata/interface/fail_generic_redeclaration.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/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/interface/fail_generic_redeclaration.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/fail_generic_redeclaration.carbon
interface NotGeneric;
// CHECK:STDERR: fail_generic_redeclaration.carbon:[[@LINE+7]]:1: error: redeclaration differs because of parameter list [RedeclParamListDiffers]
// CHECK:STDERR: interface NotGeneric(T:! type) {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_generic_redeclaration.carbon:[[@LINE-4]]:1: note: previously declared without parameter list [RedeclParamListPrevious]
// CHECK:STDERR: interface NotGeneric;
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
interface NotGeneric(T:! type) {}
interface Generic(T:! type);
// CHECK:STDERR: fail_generic_redeclaration.carbon:[[@LINE+7]]:1: error: redeclaration differs because of missing parameter list [RedeclParamListDiffers]
// CHECK:STDERR: interface Generic {}
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~
// CHECK:STDERR: fail_generic_redeclaration.carbon:[[@LINE-4]]:1: note: previously declared with parameter list [RedeclParamListPrevious]
// CHECK:STDERR: interface Generic(T:! type);
// CHECK:STDERR: ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
// CHECK:STDERR:
interface Generic {}
interface DifferentParams(T:! type);
// CHECK:STDERR: fail_generic_redeclaration.carbon:[[@LINE+7]]:27: error: type `<pattern for ()>` of parameter 1 in redeclaration differs from previous parameter type `<pattern for type>` [RedeclParamDiffersType]
// CHECK:STDERR: interface DifferentParams(T:! ()) {}
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR: fail_generic_redeclaration.carbon:[[@LINE-4]]:27: note: previous declaration's corresponding parameter here [RedeclParamPrevious]
// CHECK:STDERR: interface DifferentParams(T:! type);
// CHECK:STDERR: ^~~~~~~~
// CHECK:STDERR:
interface DifferentParams(T:! ()) {}
// CHECK:STDOUT: --- fail_generic_redeclaration.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %NotGeneric.type.d1b: type = facet_type <@NotGeneric.loc15> [concrete]
// CHECK:STDOUT: %type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %pattern_type.98f: type = pattern_type type [concrete]
// CHECK:STDOUT: %T.67d: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %NotGeneric.type.92a: type = generic_interface_type @NotGeneric.loc23 [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %NotGeneric.generic: %NotGeneric.type.92a = struct_value () [concrete]
// CHECK:STDOUT: %NotGeneric.type.3f5: type = facet_type <@NotGeneric.loc23, @NotGeneric.loc23(%T.67d)> [symbolic]
// CHECK:STDOUT: %Self.c60: %NotGeneric.type.3f5 = symbolic_binding Self, 1 [symbolic]
// CHECK:STDOUT: %Generic.type.c0b: type = generic_interface_type @Generic.loc25 [concrete]
// CHECK:STDOUT: %Generic.generic: %Generic.type.c0b = struct_value () [concrete]
// CHECK:STDOUT: %Generic.type.f69: type = facet_type <@Generic.loc33> [concrete]
// CHECK:STDOUT: %Self.560: %Generic.type.f69 = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %DifferentParams.type.74015f.1: type = generic_interface_type @DifferentParams.loc35 [concrete]
// CHECK:STDOUT: %DifferentParams.generic.6c8256.1: %DifferentParams.type.74015f.1 = struct_value () [concrete]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT: %pattern_type.cb1: type = pattern_type %empty_tuple.type [concrete]
// CHECK:STDOUT: %T.d5f: %empty_tuple.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %DifferentParams.type.74015f.2: type = generic_interface_type @DifferentParams.loc43 [concrete]
// CHECK:STDOUT: %DifferentParams.generic.6c8256.2: %DifferentParams.type.74015f.2 = struct_value () [concrete]
// CHECK:STDOUT: %DifferentParams.type.ca0: type = facet_type <@DifferentParams.loc43, @DifferentParams.loc43(%T.d5f)> [symbolic]
// CHECK:STDOUT: %Self.250: %DifferentParams.type.ca0 = symbolic_binding Self, 1 [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .NotGeneric = %NotGeneric.decl.loc15
// CHECK:STDOUT: .Generic = %Generic.decl.loc25
// CHECK:STDOUT: .DifferentParams = %DifferentParams.decl.loc35
// CHECK:STDOUT: }
// CHECK:STDOUT: %NotGeneric.decl.loc15: type = interface_decl @NotGeneric.loc15 [concrete = constants.%NotGeneric.type.d1b] {} {}
// CHECK:STDOUT: %NotGeneric.decl.loc23: %NotGeneric.type.92a = interface_decl @NotGeneric.loc23 [concrete = constants.%NotGeneric.generic] {
// CHECK:STDOUT: %T.patt: %pattern_type.98f = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc23_26.1: type = splice_block %.loc23_26.2 [concrete = type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.loc23_26.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc23_23.2: type = symbolic_binding T, 0 [symbolic = %T.loc23_23.1 (constants.%T.67d)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %Generic.decl.loc25: %Generic.type.c0b = interface_decl @Generic.loc25 [concrete = constants.%Generic.generic] {
// CHECK:STDOUT: %T.patt: %pattern_type.98f = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc25_23.1: type = splice_block %.loc25_23.2 [concrete = type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.loc25_23.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc25_20.2: type = symbolic_binding T, 0 [symbolic = %T.loc25_20.1 (constants.%T.67d)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %Generic.decl.loc33: type = interface_decl @Generic.loc33 [concrete = constants.%Generic.type.f69] {} {}
// CHECK:STDOUT: %DifferentParams.decl.loc35: %DifferentParams.type.74015f.1 = interface_decl @DifferentParams.loc35 [concrete = constants.%DifferentParams.generic.6c8256.1] {
// CHECK:STDOUT: %T.patt: %pattern_type.98f = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc35_31.1: type = splice_block %.loc35_31.2 [concrete = type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.loc35_31.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc35_28.2: type = symbolic_binding T, 0 [symbolic = %T.loc35_28.1 (constants.%T.67d)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %DifferentParams.decl.loc43: %DifferentParams.type.74015f.2 = interface_decl @DifferentParams.loc43 [concrete = constants.%DifferentParams.generic.6c8256.2] {
// CHECK:STDOUT: %T.patt: %pattern_type.cb1 = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc43_32.1: type = splice_block %.loc43_32.3 [concrete = constants.%empty_tuple.type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.loc43_32.2: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc43_32.3: type = converted %.loc43_32.2, constants.%empty_tuple.type [concrete = constants.%empty_tuple.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc43_28.2: %empty_tuple.type = symbolic_binding T, 0 [symbolic = %T.loc43_28.1 (constants.%T.d5f)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @NotGeneric.loc15;
// CHECK:STDOUT:
// CHECK:STDOUT: generic interface @NotGeneric.loc23(%T.loc23_23.2: type) {
// CHECK:STDOUT: %T.loc23_23.1: type = symbolic_binding T, 0 [symbolic = %T.loc23_23.1 (constants.%T.67d)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %NotGeneric.type: type = facet_type <@NotGeneric.loc23, @NotGeneric.loc23(%T.loc23_23.1)> [symbolic = %NotGeneric.type (constants.%NotGeneric.type.3f5)]
// CHECK:STDOUT: %Self.loc23_32.2: @NotGeneric.loc23.%NotGeneric.type (%NotGeneric.type.3f5) = symbolic_binding Self, 1 [symbolic = %Self.loc23_32.2 (constants.%Self.c60)]
// CHECK:STDOUT:
// CHECK:STDOUT: interface {
// CHECK:STDOUT: %Self.loc23_32.1: @NotGeneric.loc23.%NotGeneric.type (%NotGeneric.type.3f5) = symbolic_binding Self, 1 [symbolic = %Self.loc23_32.2 (constants.%Self.c60)]
// CHECK:STDOUT: %NotGeneric.WithSelf.decl = interface_with_self_decl @NotGeneric.loc23 [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self.loc23_32.1
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic interface @Generic.loc25(%T.loc25_20.2: type) {
// CHECK:STDOUT: %T.loc25_20.1: type = symbolic_binding T, 0 [symbolic = %T.loc25_20.1 (constants.%T.67d)]
// CHECK:STDOUT:
// CHECK:STDOUT: interface;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Generic.loc33 {
// CHECK:STDOUT: %Self: %Generic.type.f69 = symbolic_binding Self, 0 [symbolic = constants.%Self.560]
// CHECK:STDOUT: %Generic.WithSelf.decl = interface_with_self_decl @Generic.loc33 [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic interface @DifferentParams.loc35(%T.loc35_28.2: type) {
// CHECK:STDOUT: %T.loc35_28.1: type = symbolic_binding T, 0 [symbolic = %T.loc35_28.1 (constants.%T.67d)]
// CHECK:STDOUT:
// CHECK:STDOUT: interface;
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic interface @DifferentParams.loc43(%T.loc43_28.2: %empty_tuple.type) {
// CHECK:STDOUT: %T.loc43_28.1: %empty_tuple.type = symbolic_binding T, 0 [symbolic = %T.loc43_28.1 (constants.%T.d5f)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %DifferentParams.type: type = facet_type <@DifferentParams.loc43, @DifferentParams.loc43(%T.loc43_28.1)> [symbolic = %DifferentParams.type (constants.%DifferentParams.type.ca0)]
// CHECK:STDOUT: %Self.loc43_35.2: @DifferentParams.loc43.%DifferentParams.type (%DifferentParams.type.ca0) = symbolic_binding Self, 1 [symbolic = %Self.loc43_35.2 (constants.%Self.250)]
// CHECK:STDOUT:
// CHECK:STDOUT: interface {
// CHECK:STDOUT: %Self.loc43_35.1: @DifferentParams.loc43.%DifferentParams.type (%DifferentParams.type.ca0) = symbolic_binding Self, 1 [symbolic = %Self.loc43_35.2 (constants.%Self.250)]
// CHECK:STDOUT: %DifferentParams.WithSelf.decl = interface_with_self_decl @DifferentParams.loc43 [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self.loc43_35.1
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @NotGeneric.loc23(constants.%T.67d) {
// CHECK:STDOUT: %T.loc23_23.1 => constants.%T.67d
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @NotGeneric.WithSelf(constants.%T.67d, constants.%Self.c60) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Generic.loc25(constants.%T.67d) {
// CHECK:STDOUT: %T.loc25_20.1 => constants.%T.67d
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Generic.WithSelf(constants.%Self.560) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @DifferentParams.loc35(constants.%T.67d) {
// CHECK:STDOUT: %T.loc35_28.1 => constants.%T.67d
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @DifferentParams.loc43(constants.%T.d5f) {
// CHECK:STDOUT: %T.loc43_28.1 => constants.%T.d5f
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @DifferentParams.WithSelf(constants.%T.d5f, constants.%Self.250) {}
// CHECK:STDOUT:
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