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carbon-lang/toolchain/check/testdata/namespace/function.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/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/namespace/function.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/namespace/function.carbon
namespace Foo;
// Never called, just here to help catch bugs in name lookup.
fn Baz() {
}
fn Foo.Baz() {
}
fn Bar() {
Foo.Baz();
}
// CHECK:STDOUT: --- function.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Baz.type.710: type = fn_type @Baz.loc18 [concrete]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %Baz.142: %Baz.type.710 = struct_value () [concrete]
// CHECK:STDOUT: %Baz.type.bf9: type = fn_type @Baz.loc21 [concrete]
// CHECK:STDOUT: %Baz.5e7: %Baz.type.bf9 = struct_value () [concrete]
// CHECK:STDOUT: %Bar.type: type = fn_type @Bar [concrete]
// CHECK:STDOUT: %Bar: %Bar.type = struct_value () [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: .Foo = %Foo
// CHECK:STDOUT: .Baz = %Baz.decl.loc18
// CHECK:STDOUT: .Bar = %Bar.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Foo: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Baz = %Baz.decl.loc21
// CHECK:STDOUT: }
// CHECK:STDOUT: %Baz.decl.loc18: %Baz.type.710 = fn_decl @Baz.loc18 [concrete = constants.%Baz.142] {} {}
// CHECK:STDOUT: %Baz.decl.loc21: %Baz.type.bf9 = fn_decl @Baz.loc21 [concrete = constants.%Baz.5e7] {} {}
// CHECK:STDOUT: %Bar.decl: %Bar.type = fn_decl @Bar [concrete = constants.%Bar] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Baz.loc18() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Baz.loc21() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Bar() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %Foo.ref: <namespace> = name_ref Foo, file.%Foo [concrete = file.%Foo]
// CHECK:STDOUT: %Baz.ref: %Baz.type.bf9 = name_ref Baz, file.%Baz.decl.loc21 [concrete = constants.%Baz.5e7]
// CHECK:STDOUT: %Baz.call: init %empty_tuple.type = call %Baz.ref()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: