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carbon-lang/toolchain/check/testdata/alias/import_access.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
// 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/alias/import_access.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/alias/import_access.carbon
// ============================================================================
// Setup files
// ============================================================================
// --- def.carbon
package Test library "[[@TEST_NAME]]";
class C {}
private alias A = C;
// ============================================================================
// Test files
// ============================================================================
// --- def.impl.carbon
impl package Test library "[[@TEST_NAME]]";
var inst: A = {};
// --- fail_local_def.carbon
package Test library "[[@TEST_NAME]]";
import library "def";
// CHECK:STDERR: fail_local_def.carbon:[[@LINE+4]]:11: error: name `A` not found [NameNotFound]
// CHECK:STDERR: var inst: A = {};
// CHECK:STDERR: ^
// CHECK:STDERR:
var inst: A = {};
// --- fail_other_def.carbon
package Other library "[[@TEST_NAME]]";
import Test library "def";
// CHECK:STDERR: fail_other_def.carbon:[[@LINE+4]]:11: error: member name `A` not found in `Test` [MemberNameNotFoundInInstScope]
// CHECK:STDERR: var inst: Test.A = {};
// CHECK:STDERR: ^~~~~~
// CHECK:STDERR:
var inst: Test.A = {};
// CHECK:STDOUT: --- def.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .A [private] = %A
// CHECK:STDOUT: }
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: %C.ref: type = name_ref C, %C.decl [concrete = constants.%C]
// CHECK:STDOUT: %A: type = alias_binding A, %C.ref [concrete = constants.%C]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// 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.%C
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- def.impl.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %complete_type: <witness> = complete_type_witness %empty_struct_type [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT: %C.val: %C = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Test.C = import_ref Test//def, C, unloaded
// CHECK:STDOUT: %Test.A: type = import_ref Test//def, A, loaded [concrete = constants.%C]
// CHECK:STDOUT: %Test.import_ref.8f2: <witness> = import_ref Test//def, loc4_10, loaded [concrete = constants.%complete_type]
// CHECK:STDOUT: %Test.import_ref.538 = import_ref Test//def, inst{{[0-9A-F]+}} [no loc], unloaded
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .C = imports.%Test.C
// CHECK:STDOUT: .A [private] = imports.%Test.A
// CHECK:STDOUT: .inst = %inst
// CHECK:STDOUT: }
// CHECK:STDOUT: %Test.import = import Test
// CHECK:STDOUT: %default.import = import <none>
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %inst.patt: %pattern_type = ref_binding_pattern inst [concrete]
// CHECK:STDOUT: %inst.var_patt: %pattern_type = var_pattern %inst.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %inst.var: ref %C = var %inst.var_patt [concrete]
// CHECK:STDOUT: %A.ref: type = name_ref A, imports.%Test.A [concrete = constants.%C]
// CHECK:STDOUT: %inst: ref %C = ref_binding inst, %inst.var [concrete = %inst.var]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C [from "def.carbon"] {
// CHECK:STDOUT: complete_type_witness = imports.%Test.import_ref.8f2
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = imports.%Test.import_ref.538
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc4_16.1: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
// CHECK:STDOUT: %.loc4_16.2: init %C to file.%inst.var = class_init () [concrete = constants.%C.val]
// CHECK:STDOUT: %.loc4_1: init %C = converted %.loc4_16.1, %.loc4_16.2 [concrete = constants.%C.val]
// CHECK:STDOUT: assign file.%inst.var, %.loc4_1
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_local_def.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Test.C = import_ref Test//def, C, unloaded
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .C = imports.%Test.C
// CHECK:STDOUT: .A = <poisoned>
// CHECK:STDOUT: .inst = %inst
// CHECK:STDOUT: }
// CHECK:STDOUT: %default.import = import <none>
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %inst.patt: <error> = ref_binding_pattern inst [concrete]
// CHECK:STDOUT: %inst.var_patt: <error> = var_pattern %inst.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %inst.var: ref <error> = var %inst.var_patt [concrete = <error>]
// CHECK:STDOUT: %A.ref: <error> = name_ref A, <error> [concrete = <error>]
// CHECK:STDOUT: %inst: ref <error> = ref_binding inst, <error> [concrete = <error>]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc10: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
// CHECK:STDOUT: assign file.%inst.var, <error>
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_other_def.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %empty_struct_type: type = struct_type {} [concrete]
// CHECK:STDOUT: %empty_struct: %empty_struct_type = struct_value () [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Test: <namespace> = namespace file.%Test.import, [concrete] {
// CHECK:STDOUT: .A = <poisoned>
// CHECK:STDOUT: import Test//def
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Test = imports.%Test
// CHECK:STDOUT: .inst = %inst
// CHECK:STDOUT: }
// CHECK:STDOUT: %Test.import = import Test
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %inst.patt: <error> = ref_binding_pattern inst [concrete]
// CHECK:STDOUT: %inst.var_patt: <error> = var_pattern %inst.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %inst.var: ref <error> = var %inst.var_patt [concrete = <error>]
// CHECK:STDOUT: %.1: <error> = splice_block <error> [concrete = <error>] {
// CHECK:STDOUT: %Test.ref: <namespace> = name_ref Test, imports.%Test [concrete = imports.%Test]
// CHECK:STDOUT: %A.ref: <error> = name_ref A, <error> [concrete = <error>]
// CHECK:STDOUT: }
// CHECK:STDOUT: %inst: ref <error> = ref_binding inst, <error> [concrete = <error>]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @__global_init() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %.loc10: %empty_struct_type = struct_literal () [concrete = constants.%empty_struct]
// CHECK:STDOUT: assign file.%inst.var, <error>
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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