Files
carbon-lang/toolchain/check/testdata/interface/basic.carbon
T
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/basic.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/interface/basic.carbon
interface Empty {
}
interface ForwardDeclared;
interface ForwardDeclared {
fn F();
}
// CHECK:STDOUT: --- basic.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Empty.type: type = facet_type <@Empty> [concrete]
// CHECK:STDOUT: %Self.63a: %Empty.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %ForwardDeclared.type: type = facet_type <@ForwardDeclared> [concrete]
// CHECK:STDOUT: %Self.b75: %ForwardDeclared.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %ForwardDeclared.WithSelf.F.type: type = fn_type @ForwardDeclared.WithSelf.F, @ForwardDeclared.WithSelf(%Self.b75) [symbolic]
// CHECK:STDOUT: %ForwardDeclared.WithSelf.F: %ForwardDeclared.WithSelf.F.type = struct_value () [symbolic]
// CHECK:STDOUT: %ForwardDeclared.assoc_type: type = assoc_entity_type @ForwardDeclared [concrete]
// CHECK:STDOUT: %assoc0: %ForwardDeclared.assoc_type = assoc_entity element0, @ForwardDeclared.WithSelf.%ForwardDeclared.WithSelf.F.decl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Empty = %Empty.decl
// CHECK:STDOUT: .ForwardDeclared = %ForwardDeclared.decl.loc18
// CHECK:STDOUT: }
// CHECK:STDOUT: %Empty.decl: type = interface_decl @Empty [concrete = constants.%Empty.type] {} {}
// CHECK:STDOUT: %ForwardDeclared.decl.loc18: type = interface_decl @ForwardDeclared [concrete = constants.%ForwardDeclared.type] {} {}
// CHECK:STDOUT: %ForwardDeclared.decl.loc20: type = interface_decl @ForwardDeclared [concrete = constants.%ForwardDeclared.type] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Empty {
// CHECK:STDOUT: %Self: %Empty.type = symbolic_binding Self, 0 [symbolic = constants.%Self.63a]
// CHECK:STDOUT: %Empty.WithSelf.decl = interface_with_self_decl @Empty [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: witness = ()
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @ForwardDeclared {
// CHECK:STDOUT: %Self: %ForwardDeclared.type = symbolic_binding Self, 0 [symbolic = constants.%Self.b75]
// CHECK:STDOUT: %ForwardDeclared.WithSelf.decl = interface_with_self_decl @ForwardDeclared [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !with Self:
// CHECK:STDOUT: %ForwardDeclared.WithSelf.F.decl: @ForwardDeclared.WithSelf.%ForwardDeclared.WithSelf.F.type (%ForwardDeclared.WithSelf.F.type) = fn_decl @ForwardDeclared.WithSelf.F [symbolic = @ForwardDeclared.WithSelf.%ForwardDeclared.WithSelf.F (constants.%ForwardDeclared.WithSelf.F)] {} {}
// CHECK:STDOUT: %assoc0: %ForwardDeclared.assoc_type = assoc_entity element0, %ForwardDeclared.WithSelf.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = @ForwardDeclared.WithSelf.%assoc0
// CHECK:STDOUT: witness = (@ForwardDeclared.WithSelf.%ForwardDeclared.WithSelf.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @ForwardDeclared.WithSelf.F(@ForwardDeclared.%Self: %ForwardDeclared.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Empty.WithSelf(constants.%Self.63a) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ForwardDeclared.WithSelf(constants.%Self.b75) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @ForwardDeclared.WithSelf.F(constants.%Self.b75) {}
// CHECK:STDOUT: