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carbon-lang/toolchain/check/testdata/impl/impl_forall.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/impl/impl_forall.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/impl/impl_forall.carbon
interface Simple {
fn F();
}
impl forall [T:! type] T as Simple {
fn F() {}
}
// CHECK:STDOUT: --- impl_forall.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Simple.type: type = facet_type <@Simple> [concrete]
// CHECK:STDOUT: %Self: %Simple.type = symbolic_binding Self, 0 [symbolic]
// CHECK:STDOUT: %Simple.WithSelf.F.type.e70: type = fn_type @Simple.WithSelf.F, @Simple.WithSelf(%Self) [symbolic]
// CHECK:STDOUT: %Simple.WithSelf.F.302: %Simple.WithSelf.F.type.e70 = struct_value () [symbolic]
// CHECK:STDOUT: %Simple.assoc_type: type = assoc_entity_type @Simple [concrete]
// CHECK:STDOUT: %assoc0: %Simple.assoc_type = assoc_entity element0, @Simple.WithSelf.%Simple.WithSelf.F.decl [concrete]
// CHECK:STDOUT: %type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %pattern_type: type = pattern_type type [concrete]
// CHECK:STDOUT: %T: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %Simple.impl_witness: <witness> = impl_witness @T.as.Simple.impl.%Simple.impl_witness_table, @T.as.Simple.impl(%T) [symbolic]
// CHECK:STDOUT: %T.as.Simple.impl.F.type: type = fn_type @T.as.Simple.impl.F, @T.as.Simple.impl(%T) [symbolic]
// CHECK:STDOUT: %T.as.Simple.impl.F: %T.as.Simple.impl.F.type = struct_value () [symbolic]
// CHECK:STDOUT: %Simple.facet: %Simple.type = facet_value %T, (%Simple.impl_witness) [symbolic]
// CHECK:STDOUT: %Simple.WithSelf.F.type.54e: type = fn_type @Simple.WithSelf.F, @Simple.WithSelf(%Simple.facet) [symbolic]
// CHECK:STDOUT: %Simple.WithSelf.F.0a3: %Simple.WithSelf.F.type.54e = struct_value () [symbolic]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Simple = %Simple.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Simple.decl: type = interface_decl @Simple [concrete = constants.%Simple.type] {} {}
// CHECK:STDOUT: impl_decl @T.as.Simple.impl [concrete] {
// CHECK:STDOUT: %T.patt: %pattern_type = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %T.ref: type = name_ref T, %T.loc19_15.2 [symbolic = %T.loc19_15.1 (constants.%T)]
// CHECK:STDOUT: %Simple.ref: type = name_ref Simple, file.%Simple.decl [concrete = constants.%Simple.type]
// CHECK:STDOUT: %.loc19_18.1: type = splice_block %.loc19_18.2 [concrete = type] {
// CHECK:STDOUT: %.Self: %type = symbolic_binding .Self [symbolic_self = constants.%.Self]
// CHECK:STDOUT: %.loc19_18.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc19_15.2: type = symbolic_binding T, 0 [symbolic = %T.loc19_15.1 (constants.%T)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: interface @Simple {
// CHECK:STDOUT: %Self: %Simple.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
// CHECK:STDOUT: %Simple.WithSelf.decl = interface_with_self_decl @Simple [concrete]
// CHECK:STDOUT:
// CHECK:STDOUT: !with Self:
// CHECK:STDOUT: %Simple.WithSelf.F.decl: @Simple.WithSelf.%Simple.WithSelf.F.type (%Simple.WithSelf.F.type.e70) = fn_decl @Simple.WithSelf.F [symbolic = @Simple.WithSelf.%Simple.WithSelf.F (constants.%Simple.WithSelf.F.302)] {} {}
// CHECK:STDOUT: %assoc0: %Simple.assoc_type = assoc_entity element0, %Simple.WithSelf.F.decl [concrete = constants.%assoc0]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .Self = %Self
// CHECK:STDOUT: .F = @Simple.WithSelf.%assoc0
// CHECK:STDOUT: witness = (@Simple.WithSelf.%Simple.WithSelf.F.decl)
// CHECK:STDOUT:
// CHECK:STDOUT: !requires:
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic impl @T.as.Simple.impl(%T.loc19_15.2: type) {
// CHECK:STDOUT: %T.loc19_15.1: type = symbolic_binding T, 0 [symbolic = %T.loc19_15.1 (constants.%T)]
// CHECK:STDOUT: %Simple.impl_witness.loc19_36.2: <witness> = impl_witness %Simple.impl_witness_table, @T.as.Simple.impl(%T.loc19_15.1) [symbolic = %Simple.impl_witness.loc19_36.2 (constants.%Simple.impl_witness)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.as.Simple.impl.F.type: type = fn_type @T.as.Simple.impl.F, @T.as.Simple.impl(%T.loc19_15.1) [symbolic = %T.as.Simple.impl.F.type (constants.%T.as.Simple.impl.F.type)]
// CHECK:STDOUT: %T.as.Simple.impl.F: @T.as.Simple.impl.%T.as.Simple.impl.F.type (%T.as.Simple.impl.F.type) = struct_value () [symbolic = %T.as.Simple.impl.F (constants.%T.as.Simple.impl.F)]
// CHECK:STDOUT:
// CHECK:STDOUT: impl: %T.ref as %Simple.ref {
// CHECK:STDOUT: %T.as.Simple.impl.F.decl: @T.as.Simple.impl.%T.as.Simple.impl.F.type (%T.as.Simple.impl.F.type) = fn_decl @T.as.Simple.impl.F [symbolic = @T.as.Simple.impl.%T.as.Simple.impl.F (constants.%T.as.Simple.impl.F)] {} {}
// CHECK:STDOUT: %Simple.impl_witness_table = impl_witness_table (%T.as.Simple.impl.F.decl), @T.as.Simple.impl [concrete]
// CHECK:STDOUT: %Simple.impl_witness.loc19_36.1: <witness> = impl_witness %Simple.impl_witness_table, @T.as.Simple.impl(constants.%T) [symbolic = %Simple.impl_witness.loc19_36.2 (constants.%Simple.impl_witness)]
// CHECK:STDOUT:
// CHECK:STDOUT: !members:
// CHECK:STDOUT: .F = %T.as.Simple.impl.F.decl
// CHECK:STDOUT: extend %Simple.ref
// CHECK:STDOUT: witness = %Simple.impl_witness.loc19_36.1
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @Simple.WithSelf.F(@Simple.%Self: %Simple.type) {
// CHECK:STDOUT: fn();
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @T.as.Simple.impl.F(@T.as.Simple.impl.%T.loc19_15.2: type) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Simple.WithSelf(constants.%Self) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Self => constants.%Self
// CHECK:STDOUT: %Simple.WithSelf.F.type => constants.%Simple.WithSelf.F.type.e70
// CHECK:STDOUT: %Simple.WithSelf.F => constants.%Simple.WithSelf.F.302
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Simple.WithSelf.F(constants.%Self) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.as.Simple.impl(constants.%T) {
// CHECK:STDOUT: %T.loc19_15.1 => constants.%T
// CHECK:STDOUT: %Simple.impl_witness.loc19_36.2 => constants.%Simple.impl_witness
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %T.as.Simple.impl.F.type => constants.%T.as.Simple.impl.F.type
// CHECK:STDOUT: %T.as.Simple.impl.F => constants.%T.as.Simple.impl.F
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @T.as.Simple.impl.F(constants.%T) {}
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Simple.WithSelf(constants.%Simple.facet) {
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %Self => constants.%Simple.facet
// CHECK:STDOUT: %Simple.WithSelf.F.type => constants.%Simple.WithSelf.F.type.54e
// CHECK:STDOUT: %Simple.WithSelf.F => constants.%Simple.WithSelf.F.0a3
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @Simple.WithSelf.F(constants.%Simple.facet) {}
// CHECK:STDOUT:
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