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carbon-lang/toolchain/check/testdata/impl/lookup/alias.carbon
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Richard Smith cefa0397bb More fixes to package and library fingerprinting. (#7297) 
Fix import logic to make all imported packages be children of the
`NameScopeId::Package` scope. Previously, indirectly-imported packages
would end up as children of their importing package's scope, which
resulted in them not being treated as packages at all, and in particular
not being fingerprinted as packages.

Fixing that caused a failure in the fingerprinting logic as we started
to encounter packages with no correspoding import scopes. Instead of
looking for import scopes, use a simpler mechanism to map packages to
their package names, and clean up.

Unfortunately the latter change churns all the fingerprints again :(
Hopefully this is the last time for a while.
2026-06-04 17:41:46 +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/impl/lookup/alias.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/lookup/alias.carbon
interface HasF {
fn F();
}
class C {
alias G = HasF.F;
}
impl C as HasF {
fn F() {}
}
fn G(c: C) {
C.G();
c.G();
}
// CHECK:STDOUT: --- alias.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %HasF.type: type = facet_type <@HasF> [concrete]
// CHECK:STDOUT: %Self: %HasF.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %HasF.WithSelf.F.type.a73: type = fn_type @HasF.WithSelf.F, @HasF.WithSelf(%Self) [symbolic]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %HasF.WithSelf.F.851: %HasF.WithSelf.F.type.a73 = struct_value () [symbolic]
// CHECK:STDOUT: %HasF.assoc_type: type = assoc_entity_type @HasF [concrete]
// CHECK:STDOUT: %assoc0: %HasF.assoc_type = assoc_entity element0, @HasF.WithSelf.%HasF.WithSelf.F.decl [concrete]
// 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: %HasF.impl_witness: <witness> = impl_witness @C.as.HasF.impl.%HasF.impl_witness_table [concrete]
// CHECK:STDOUT: %C.as.HasF.impl.F.type: type = fn_type @C.as.HasF.impl.F [concrete]
// CHECK:STDOUT: %C.as.HasF.impl.F: %C.as.HasF.impl.F.type = struct_value () [concrete]
// CHECK:STDOUT: %HasF.facet: %HasF.type = facet_value %C, (%HasF.impl_witness) [concrete]
// CHECK:STDOUT: %HasF.WithSelf.F.type.263: type = fn_type @HasF.WithSelf.F, @HasF.WithSelf(%HasF.facet) [concrete]
// CHECK:STDOUT: %HasF.WithSelf.F.3c7: %HasF.WithSelf.F.type.263 = struct_value () [concrete]
// CHECK:STDOUT: %pattern_type: type = pattern_type %C [concrete]
// CHECK:STDOUT: %G.type: type = fn_type @G [concrete]
// CHECK:STDOUT: %G: %G.type = struct_value () [concrete]
// CHECK:STDOUT: %.34f: type = fn_type_with_self_type %HasF.WithSelf.F.type.263, %HasF.facet [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .HasF = %HasF.decl
// CHECK:STDOUT: .C = %C.decl
// CHECK:STDOUT: .G = %G.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %HasF.decl: type = interface_decl @HasF [concrete = constants.%HasF.type] {} {}
// CHECK:STDOUT: %C.decl: type = class_decl @C [concrete = constants.%C] {} {}
// CHECK:STDOUT: impl_decl @C.as.HasF.impl [concrete] {} {
// CHECK:STDOUT: %C.ref: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %HasF.ref: type = name_ref HasF, file.%HasF.decl [concrete = constants.%HasF.type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %G.decl: %G.type = fn_decl @G [concrete = constants.%G] {
// CHECK:STDOUT: %c.param_patt: %pattern_type = value_param_pattern [concrete]
// CHECK:STDOUT: %c.patt: %pattern_type = at_binding_pattern c, %c.param_patt [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %c.param: %C = value_param call_param0
// CHECK:STDOUT: %C.ref.loc27: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %c: %C = value_binding c, %c.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @HasF {
// CHECK:STDOUT: %Self: %HasF.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %HasF.WithSelf.decl = interface_with_self_decl @HasF [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !with Self:
// CHECK:STDOUT: %HasF.WithSelf.F.decl: @HasF.WithSelf.%HasF.WithSelf.F.type (%HasF.WithSelf.F.type.a73) = fn_decl @HasF.WithSelf.F [symbolic = @HasF.WithSelf.%HasF.WithSelf.F (constants.%HasF.WithSelf.F.851)] {} {}
// CHECK:STDOUT: %assoc0: %HasF.assoc_type = assoc_entity element0, %HasF.WithSelf.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = @HasF.WithSelf.%assoc0
// CHECK:STDOUT: witness = (@HasF.WithSelf.%HasF.WithSelf.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: impl @C.as.HasF.impl: %C.ref as %HasF.ref {
// CHECK:STDOUT: %C.as.HasF.impl.F.decl: %C.as.HasF.impl.F.type = fn_decl @C.as.HasF.impl.F [concrete = constants.%C.as.HasF.impl.F] {} {}
// CHECK:STDOUT: %HasF.impl_witness_table = impl_witness_table (%C.as.HasF.impl.F.decl), @C.as.HasF.impl [concrete]
// CHECK:STDOUT: %HasF.impl_witness: <witness> = impl_witness %HasF.impl_witness_table [concrete = constants.%HasF.impl_witness]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .F = %C.as.HasF.impl.F.decl
// CHECK:STDOUT: extend %HasF.ref
// CHECK:STDOUT: witness = %HasF.impl_witness
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: class @C {
// CHECK:STDOUT: %HasF.ref: type = name_ref HasF, file.%HasF.decl [concrete = constants.%HasF.type]
// CHECK:STDOUT: %F.ref: %HasF.assoc_type = name_ref F, @HasF.WithSelf.%assoc0 [concrete = constants.%assoc0]
// CHECK:STDOUT: %G: %HasF.assoc_type = alias_binding G, %F.ref [concrete = constants.%assoc0]
// 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: .HasF = <poisoned>
// CHECK:STDOUT: .G = %G
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @HasF.WithSelf.F(@HasF.%Self: %HasF.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @C.as.HasF.impl.F() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @G(%c.param: %C) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %C.ref.loc28: type = name_ref C, file.%C.decl [concrete = constants.%C]
// CHECK:STDOUT: %G.ref.loc28: %HasF.assoc_type = name_ref G, @C.%G [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0.loc28: %.34f = impl_witness_access constants.%HasF.impl_witness, element0 [concrete = constants.%C.as.HasF.impl.F]
// CHECK:STDOUT: %C.as.HasF.impl.F.call.loc28: init %empty_tuple.type = call %impl.elem0.loc28()
// CHECK:STDOUT: %c.ref: %C = name_ref c, %c
// CHECK:STDOUT: %G.ref.loc29: %HasF.assoc_type = name_ref G, @C.%G [concrete = constants.%assoc0]
// CHECK:STDOUT: %impl.elem0.loc29: %.34f = impl_witness_access constants.%HasF.impl_witness, element0 [concrete = constants.%C.as.HasF.impl.F]
// CHECK:STDOUT: %C.as.HasF.impl.F.call.loc29: init %empty_tuple.type = call %impl.elem0.loc29()
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @HasF.WithSelf(constants.%Self) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %HasF.WithSelf.F.type => constants.%HasF.WithSelf.F.type.a73
// CHECK:STDOUT: %HasF.WithSelf.F => constants.%HasF.WithSelf.F.851
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @HasF.WithSelf.F(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @HasF.WithSelf(constants.%HasF.facet) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Self => constants.%HasF.facet
// CHECK:STDOUT: %HasF.WithSelf.F.type => constants.%HasF.WithSelf.F.type.263
// CHECK:STDOUT: %HasF.WithSelf.F => constants.%HasF.WithSelf.F.3c7
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @HasF.WithSelf.F(constants.%HasF.facet) {}
// CHECK:STDOUT:
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