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carbon-lang/toolchain/check/testdata/where_expr/dot_self_index.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/primitives.carbon
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/where_expr/dot_self_index.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/where_expr/dot_self_index.carbon
interface Empty(W:! type) {
let A:! type;
}
// T has index 0
// .Self has index invalid, not 1
// V has index 1, does not match .Self
//@dump-sem-ir-begin
fn H(T:! type, unused U: Empty(T) where .A = T*, unused V:! type) {}
//@dump-sem-ir-end
fn G(U: Empty(i32) where .A = i32*) {
H(i32, U, bool);
}
// CHECK:STDOUT: --- dot_self_index.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %type: type = facet_type <type> [concrete]
// CHECK:STDOUT: %.Self.c39: %type = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %pattern_type.98f: type = pattern_type type [concrete]
// CHECK:STDOUT: %Empty.type.6bc: type = generic_interface_type @Empty [concrete]
// CHECK:STDOUT: %Empty.generic: %Empty.type.6bc = struct_value () [concrete]
// CHECK:STDOUT: %T: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %Empty.type.0ffeb0.2: type = facet_type <@Empty, @Empty(%T)> [symbolic]
// CHECK:STDOUT: %.Self.363: %Empty.type.0ffeb0.2 = symbolic_binding .Self [symbolic]
// CHECK:STDOUT: %Empty.assoc_type.207fe8.2: type = assoc_entity_type @Empty, @Empty(%T) [symbolic]
// CHECK:STDOUT: %assoc0.cf6da7.2: %Empty.assoc_type.207fe8.2 = assoc_entity element0, @Empty.WithSelf.%A [symbolic]
// CHECK:STDOUT: %require_complete.df6: <witness> = require_complete_type %Empty.type.0ffeb0.2 [symbolic]
// CHECK:STDOUT: %.Self.as_type.75f: type = facet_access_type %.Self.363 [symbolic]
// CHECK:STDOUT: %Empty.lookup_impl_witness.2e8: <witness> = lookup_impl_witness %.Self.363, @Empty, @Empty(%T) [symbolic]
// CHECK:STDOUT: %impl.elem0.453: type = impl_witness_access %Empty.lookup_impl_witness.2e8, element0 [symbolic]
// CHECK:STDOUT: %ptr.e8f: type = ptr_type %T [symbolic]
// CHECK:STDOUT: %Empty_where.type.e1d: type = facet_type <@Empty, @Empty(%T) where %impl.elem0.453 = %ptr.e8f> [symbolic]
// CHECK:STDOUT: %pattern_type.369: type = pattern_type %Empty_where.type.e1d [symbolic]
// CHECK:STDOUT: %V: type = symbolic_binding V, 1 [symbolic]
// CHECK:STDOUT: %H.type: type = fn_type @H [concrete]
// CHECK:STDOUT: %H: %H.type = struct_value () [concrete]
// CHECK:STDOUT: %require_complete.d4e: <witness> = require_complete_type %Empty_where.type.e1d [symbolic]
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %Empty.type.bcd: type = facet_type <@Empty, @Empty(%i32)> [concrete]
// CHECK:STDOUT: %.Self.f9e: %Empty.type.bcd = symbolic_binding .Self [symbolic_self]
// CHECK:STDOUT: %Empty.assoc_type.3e3: type = assoc_entity_type @Empty, @Empty(%i32) [concrete]
// CHECK:STDOUT: %assoc0.ca7: %Empty.assoc_type.3e3 = assoc_entity element0, @Empty.WithSelf.%A [concrete]
// CHECK:STDOUT: %.Self.as_type.fcb: type = facet_access_type %.Self.f9e [symbolic_self]
// CHECK:STDOUT: %Empty.lookup_impl_witness.990: <witness> = lookup_impl_witness %.Self.f9e, @Empty, @Empty(%i32) [symbolic_self]
// CHECK:STDOUT: %impl.elem0.177: type = impl_witness_access %Empty.lookup_impl_witness.990, element0 [symbolic_self]
// CHECK:STDOUT: %ptr.143: type = ptr_type %i32 [concrete]
// CHECK:STDOUT: %Empty_where.type.5b2: type = facet_type <@Empty, @Empty(%i32) where %impl.elem0.177 = %ptr.143> [concrete]
// CHECK:STDOUT: %pattern_type.cf6: type = pattern_type %Empty_where.type.5b2 [concrete]
// CHECK:STDOUT: %complete_type.866: <witness> = complete_type_witness %Empty.type.bcd [concrete]
// CHECK:STDOUT: %complete_type.315: <witness> = complete_type_witness %Empty_where.type.5b2 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: %H.decl: %H.type = fn_decl @H [concrete = constants.%H] {
// CHECK:STDOUT: %T.patt: %pattern_type.98f = symbolic_binding_pattern T, 0 [concrete]
// CHECK:STDOUT: %U.param_patt: @H.%pattern_type (%pattern_type.369) = value_param_pattern [concrete]
// CHECK:STDOUT: %U.patt: @H.%pattern_type (%pattern_type.369) = at_binding_pattern U, %U.param_patt [concrete]
// CHECK:STDOUT: %V.patt: %pattern_type.98f = symbolic_binding_pattern V, 1 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %.loc21_10.1: type = splice_block %.loc21_10.2 [concrete = type] {
// CHECK:STDOUT: %.Self.loc21_7: %type = symbolic_binding .Self [symbolic_self = constants.%.Self.c39]
// CHECK:STDOUT: %.loc21_10.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %T.loc21_7.2: type = symbolic_binding T, 0 [symbolic = %T.loc21_7.1 (constants.%T)]
// CHECK:STDOUT: %U.param: @H.%Empty_where.type (%Empty_where.type.e1d) = value_param call_param0
// CHECK:STDOUT: %.loc21_35.1: type = splice_block %.loc21_35.2 [symbolic = %Empty_where.type (constants.%Empty_where.type.e1d)] {
// CHECK:STDOUT: %Empty.ref: %Empty.type.6bc = name_ref Empty, file.%Empty.decl [concrete = constants.%Empty.generic]
// CHECK:STDOUT: %T.ref.loc21_32: type = name_ref T, %T.loc21_7.2 [symbolic = %T.loc21_7.1 (constants.%T)]
// CHECK:STDOUT: %Empty.type.loc21_33.2: type = facet_type <@Empty, @Empty(constants.%T)> [symbolic = %Empty.type.loc21_33.1 (constants.%Empty.type.0ffeb0.2)]
// CHECK:STDOUT: %.Self.loc21_35.2: @H.%Empty.type.loc21_33.1 (%Empty.type.0ffeb0.2) = symbolic_binding .Self [symbolic = %.Self.loc21_35.1 (constants.%.Self.363)]
// CHECK:STDOUT: %.Self.ref: @H.%Empty.type.loc21_33.1 (%Empty.type.0ffeb0.2) = name_ref .Self, %.Self.loc21_35.2 [symbolic = %.Self.loc21_35.1 (constants.%.Self.363)]
// CHECK:STDOUT: %.Self.as_type.loc21_41.2: type = facet_access_type %.Self.ref [symbolic = %.Self.as_type.loc21_41.1 (constants.%.Self.as_type.75f)]
// CHECK:STDOUT: %.loc21_41.1: type = converted %.Self.ref, %.Self.as_type.loc21_41.2 [symbolic = %.Self.as_type.loc21_41.1 (constants.%.Self.as_type.75f)]
// CHECK:STDOUT: %.loc21_41.2: @H.%Empty.assoc_type (%Empty.assoc_type.207fe8.2) = specific_constant @A.%assoc0, @Empty.WithSelf(constants.%T, constants.%.Self.363) [symbolic = %assoc0 (constants.%assoc0.cf6da7.2)]
// CHECK:STDOUT: %A.ref: @H.%Empty.assoc_type (%Empty.assoc_type.207fe8.2) = name_ref A, %.loc21_41.2 [symbolic = %assoc0 (constants.%assoc0.cf6da7.2)]
// CHECK:STDOUT: %impl.elem0.loc21_41.2: type = impl_witness_access constants.%Empty.lookup_impl_witness.2e8, element0 [symbolic = %impl.elem0.loc21_41.1 (constants.%impl.elem0.453)]
// CHECK:STDOUT: %T.ref.loc21_46: type = name_ref T, %T.loc21_7.2 [symbolic = %T.loc21_7.1 (constants.%T)]
// CHECK:STDOUT: %ptr.loc21_47.2: type = ptr_type %T.ref.loc21_46 [symbolic = %ptr.loc21_47.1 (constants.%ptr.e8f)]
// CHECK:STDOUT: %.loc21_35.2: type = where_expr [symbolic = %Empty_where.type (constants.%Empty_where.type.e1d)] {
// CHECK:STDOUT: requirement_base_facet_type %Empty.type.loc21_33.2
// CHECK:STDOUT: requirement_rewrite %impl.elem0.loc21_41.2, %ptr.loc21_47.2
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: %U: @H.%Empty_where.type (%Empty_where.type.e1d) = value_binding U, %U.param
// CHECK:STDOUT: %.loc21_61.1: type = splice_block %.loc21_61.2 [concrete = type] {
// CHECK:STDOUT: %.Self.loc21_58: %type = symbolic_binding .Self [symbolic_self = constants.%.Self.c39]
// CHECK:STDOUT: %.loc21_61.2: type = type_literal type [concrete = type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %V.loc21_58.2: type = symbolic_binding V, 1 [symbolic = %V.loc21_58.1 (constants.%V)]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @H(%T.loc21_7.2: type, %V.loc21_58.2: type) {
// CHECK:STDOUT: %T.loc21_7.1: type = symbolic_binding T, 0 [symbolic = %T.loc21_7.1 (constants.%T)]
// CHECK:STDOUT: %Empty.type.loc21_33.1: type = facet_type <@Empty, @Empty(%T.loc21_7.1)> [symbolic = %Empty.type.loc21_33.1 (constants.%Empty.type.0ffeb0.2)]
// CHECK:STDOUT: %.Self.loc21_35.1: @H.%Empty.type.loc21_33.1 (%Empty.type.0ffeb0.2) = symbolic_binding .Self [symbolic = %.Self.loc21_35.1 (constants.%.Self.363)]
// CHECK:STDOUT: %require_complete.loc21_41: <witness> = require_complete_type %Empty.type.loc21_33.1 [symbolic = %require_complete.loc21_41 (constants.%require_complete.df6)]
// CHECK:STDOUT: %.Self.as_type.loc21_41.1: type = facet_access_type %.Self.loc21_35.1 [symbolic = %.Self.as_type.loc21_41.1 (constants.%.Self.as_type.75f)]
// CHECK:STDOUT: %Empty.assoc_type: type = assoc_entity_type @Empty, @Empty(%T.loc21_7.1) [symbolic = %Empty.assoc_type (constants.%Empty.assoc_type.207fe8.2)]
// CHECK:STDOUT: %assoc0: @H.%Empty.assoc_type (%Empty.assoc_type.207fe8.2) = assoc_entity element0, @Empty.WithSelf.%A [symbolic = %assoc0 (constants.%assoc0.cf6da7.2)]
// CHECK:STDOUT: %Empty.lookup_impl_witness: <witness> = lookup_impl_witness %.Self.loc21_35.1, @Empty, @Empty(%T.loc21_7.1) [symbolic = %Empty.lookup_impl_witness (constants.%Empty.lookup_impl_witness.2e8)]
// CHECK:STDOUT: %impl.elem0.loc21_41.1: type = impl_witness_access %Empty.lookup_impl_witness, element0 [symbolic = %impl.elem0.loc21_41.1 (constants.%impl.elem0.453)]
// CHECK:STDOUT: %ptr.loc21_47.1: type = ptr_type %T.loc21_7.1 [symbolic = %ptr.loc21_47.1 (constants.%ptr.e8f)]
// CHECK:STDOUT: %Empty_where.type: type = facet_type <@Empty, @Empty(%T.loc21_7.1) where %impl.elem0.loc21_41.1 = %ptr.loc21_47.1> [symbolic = %Empty_where.type (constants.%Empty_where.type.e1d)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %Empty_where.type [symbolic = %pattern_type (constants.%pattern_type.369)]
// CHECK:STDOUT: %V.loc21_58.1: type = symbolic_binding V, 1 [symbolic = %V.loc21_58.1 (constants.%V)]
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %require_complete.loc21_24: <witness> = require_complete_type %Empty_where.type [symbolic = %require_complete.loc21_24 (constants.%require_complete.d4e)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn(%U.param: @H.%Empty_where.type (%Empty_where.type.e1d)) {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @H(constants.%T, constants.%V) {
// CHECK:STDOUT: %T.loc21_7.1 => constants.%T
// CHECK:STDOUT: %Empty.type.loc21_33.1 => constants.%Empty.type.0ffeb0.2
// CHECK:STDOUT: %.Self.loc21_35.1 => constants.%.Self.363
// CHECK:STDOUT: %require_complete.loc21_41 => constants.%require_complete.df6
// CHECK:STDOUT: %.Self.as_type.loc21_41.1 => constants.%.Self.as_type.75f
// CHECK:STDOUT: %Empty.assoc_type => constants.%Empty.assoc_type.207fe8.2
// CHECK:STDOUT: %assoc0 => constants.%assoc0.cf6da7.2
// CHECK:STDOUT: %Empty.lookup_impl_witness => constants.%Empty.lookup_impl_witness.2e8
// CHECK:STDOUT: %impl.elem0.loc21_41.1 => constants.%impl.elem0.453
// CHECK:STDOUT: %ptr.loc21_47.1 => constants.%ptr.e8f
// CHECK:STDOUT: %Empty_where.type => constants.%Empty_where.type.e1d
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.369
// CHECK:STDOUT: %V.loc21_58.1 => constants.%V
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @H(constants.%i32, bool) {
// CHECK:STDOUT: %T.loc21_7.1 => constants.%i32
// CHECK:STDOUT: %Empty.type.loc21_33.1 => constants.%Empty.type.bcd
// CHECK:STDOUT: %.Self.loc21_35.1 => constants.%.Self.f9e
// CHECK:STDOUT: %require_complete.loc21_41 => constants.%complete_type.866
// CHECK:STDOUT: %.Self.as_type.loc21_41.1 => constants.%.Self.as_type.fcb
// CHECK:STDOUT: %Empty.assoc_type => constants.%Empty.assoc_type.3e3
// CHECK:STDOUT: %assoc0 => constants.%assoc0.ca7
// CHECK:STDOUT: %Empty.lookup_impl_witness => constants.%Empty.lookup_impl_witness.990
// CHECK:STDOUT: %impl.elem0.loc21_41.1 => constants.%impl.elem0.177
// CHECK:STDOUT: %ptr.loc21_47.1 => constants.%ptr.143
// CHECK:STDOUT: %Empty_where.type => constants.%Empty_where.type.5b2
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.cf6
// CHECK:STDOUT: %V.loc21_58.1 => bool
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %require_complete.loc21_24 => constants.%complete_type.315
// CHECK:STDOUT: }
// CHECK:STDOUT:
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