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carbon-lang/toolchain/check/testdata/pointer/nested_const.carbon
T
Dana Jansens f8dd4d85bf Do not treat impls in different scopes as redeclarations (#7161) 
An impl in a different scope, with the same parameters, will overlap and
get diagnosed for that later by the [prioritization
rule](https://docs.carbon-lang.dev/docs/design/generics/details.html#prioritization-rule),
if they are not in a match_first block. But they are not considered as
redeclarations.

See [proposal
p5366](https://github.com/carbon-language/carbon-lang/blob/62b94f79322039acc3fc8e175896a64a32df470e/proposals/p5366.md)
for the rule.
2026-05-04 19:11:51 +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/int.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/pointer/nested_const.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/pointer/nested_const.carbon
// TODO: The `const` in the return type should not be necessary.
fn F(p: const (const (const i32*)*)) -> const i32 {
return **p;
}
// CHECK:STDOUT: --- nested_const.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %Int.type: type = generic_class_type @Int [concrete]
// CHECK:STDOUT: %Int.generic: %Int.type = struct_value () [concrete]
// CHECK:STDOUT: %N: Core.IntLiteral = symbolic_binding N, 0 [symbolic]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %const.20a: type = const_type %i32 [concrete]
// CHECK:STDOUT: %ptr.36b: type = ptr_type %const.20a [concrete]
// CHECK:STDOUT: %const.58f: type = const_type %ptr.36b [concrete]
// CHECK:STDOUT: %ptr.6e8: type = ptr_type %const.58f [concrete]
// CHECK:STDOUT: %const.fa2: type = const_type %ptr.6e8 [concrete]
// CHECK:STDOUT: %pattern_type.800: type = pattern_type %const.fa2 [concrete]
// CHECK:STDOUT: %.121: Core.Form = init_form %const.20a [concrete]
// CHECK:STDOUT: %pattern_type.a65: type = pattern_type %const.20a [concrete]
// CHECK:STDOUT: %F.type: type = fn_type @F [concrete]
// CHECK:STDOUT: %F: %F.type = struct_value () [concrete]
// CHECK:STDOUT: %Copy.type: type = facet_type <@Copy> [concrete]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.type.161: type = fn_type @Int.as.Copy.impl.Op, @Int.as.Copy.impl(%N) [symbolic]
// CHECK:STDOUT: %Int.as.Copy.impl.Op.012: %Int.as.Copy.impl.Op.type.161 = struct_value () [symbolic]
// CHECK:STDOUT: %T.035: %Copy.type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %const.as.Copy.impl.Op.type.7ab: type = fn_type @const.as.Copy.impl.Op, @const.as.Copy.impl(%T.035) [symbolic]
// CHECK:STDOUT: %const.as.Copy.impl.Op.e11: %const.as.Copy.impl.Op.type.7ab = struct_value () [symbolic]
// CHECK:STDOUT: %Copy.impl_witness.30d: <witness> = impl_witness imports.%Copy.impl_witness_table.1ee, @Int.as.Copy.impl(%int_32) [concrete]
// CHECK:STDOUT: %Copy.facet.d1a: %Copy.type = facet_value %i32, (%Copy.impl_witness.30d) [concrete]
// CHECK:STDOUT: %Copy.impl_witness.38b: <witness> = impl_witness imports.%Copy.impl_witness_table.f86, @const.as.Copy.impl(%Copy.facet.d1a) [concrete]
// CHECK:STDOUT: %const.as.Copy.impl.Op.type.b50: type = fn_type @const.as.Copy.impl.Op, @const.as.Copy.impl(%Copy.facet.d1a) [concrete]
// CHECK:STDOUT: %const.as.Copy.impl.Op.129: %const.as.Copy.impl.Op.type.b50 = struct_value () [concrete]
// CHECK:STDOUT: %Copy.facet.e9d: %Copy.type = facet_value %const.20a, (%Copy.impl_witness.38b) [concrete]
// CHECK:STDOUT: %Copy.WithSelf.Op.type.7a0: type = fn_type @Copy.WithSelf.Op, @Copy.WithSelf(%Copy.facet.e9d) [concrete]
// CHECK:STDOUT: %.5b5: type = fn_type_with_self_type %Copy.WithSelf.Op.type.7a0, %Copy.facet.e9d [concrete]
// CHECK:STDOUT: %const.as.Copy.impl.Op.specific_fn: <specific function> = specific_function %const.as.Copy.impl.Op.129, @const.as.Copy.impl.Op(%Copy.facet.d1a) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .Int = %Core.Int
// CHECK:STDOUT: .Copy = %Core.Copy
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT: %Core.Copy: type = import_ref Core//prelude/parts/copy, Copy, loaded [concrete = constants.%Copy.type]
// CHECK:STDOUT: %Core.import_ref.dbb: @Int.as.Copy.impl.%Int.as.Copy.impl.Op.type (%Int.as.Copy.impl.Op.type.161) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.Copy.impl.%Int.as.Copy.impl.Op (constants.%Int.as.Copy.impl.Op.012)]
// CHECK:STDOUT: %Copy.impl_witness_table.1ee = impl_witness_table (%Core.import_ref.dbb), @Int.as.Copy.impl [concrete]
// CHECK:STDOUT: %Core.import_ref.843: @const.as.Copy.impl.%const.as.Copy.impl.Op.type (%const.as.Copy.impl.Op.type.7ab) = import_ref Core//prelude/parts/copy, loc{{\d+_\d+}}, loaded [symbolic = @const.as.Copy.impl.%const.as.Copy.impl.Op (constants.%const.as.Copy.impl.Op.e11)]
// CHECK:STDOUT: %Copy.impl_witness_table.f86 = impl_witness_table (%Core.import_ref.843), @const.as.Copy.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .F = %F.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %F.decl: %F.type = fn_decl @F [concrete = constants.%F] {
// CHECK:STDOUT: %p.param_patt: %pattern_type.800 = value_param_pattern [concrete]
// CHECK:STDOUT: %p.patt: %pattern_type.800 = at_binding_pattern p, %p.param_patt [concrete]
// CHECK:STDOUT: %return.param_patt: %pattern_type.a65 = out_param_pattern [concrete]
// CHECK:STDOUT: %return.patt: %pattern_type.a65 = return_slot_pattern %return.param_patt, %const.loc16_41 [concrete]
// CHECK:STDOUT: } {
// CHECK:STDOUT: %i32.loc16_47: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %const.loc16_41: type = const_type %i32.loc16_47 [concrete = constants.%const.20a]
// CHECK:STDOUT: %.loc16_41: Core.Form = init_form %const.loc16_41 [concrete = constants.%.121]
// CHECK:STDOUT: %p.param: %const.fa2 = value_param call_param0
// CHECK:STDOUT: %.loc16_9: type = splice_block %const.loc16_9 [concrete = constants.%const.fa2] {
// CHECK:STDOUT: %i32.loc16_29: type = type_literal constants.%i32 [concrete = constants.%i32]
// CHECK:STDOUT: %const.loc16_23: type = const_type %i32.loc16_29 [concrete = constants.%const.20a]
// CHECK:STDOUT: %ptr.loc16_32: type = ptr_type %const.loc16_23 [concrete = constants.%ptr.36b]
// CHECK:STDOUT: %const.loc16_16: type = const_type %ptr.loc16_32 [concrete = constants.%const.58f]
// CHECK:STDOUT: %ptr.loc16_34: type = ptr_type %const.loc16_16 [concrete = constants.%ptr.6e8]
// CHECK:STDOUT: %const.loc16_9: type = const_type %ptr.loc16_34 [concrete = constants.%const.fa2]
// CHECK:STDOUT: }
// CHECK:STDOUT: %p: %const.fa2 = value_binding p, %p.param
// CHECK:STDOUT: %return.param: ref %const.20a = out_param call_param1
// CHECK:STDOUT: %return: ref %const.20a = return_slot %return.param
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @F(%p.param: %const.fa2) -> out %return.param: %const.20a {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %p.ref: %const.fa2 = name_ref p, %p
// CHECK:STDOUT: %.loc17_11.1: ref %const.58f = deref %p.ref
// CHECK:STDOUT: %.loc17_11.2: %const.58f = acquire_value %.loc17_11.1
// CHECK:STDOUT: %.loc17_10.1: ref %const.20a = deref %.loc17_11.2
// CHECK:STDOUT: %.loc17_10.2: %const.20a = acquire_value %.loc17_10.1
// CHECK:STDOUT: %impl.elem0: %.5b5 = impl_witness_access constants.%Copy.impl_witness.38b, element0 [concrete = constants.%const.as.Copy.impl.Op.129]
// CHECK:STDOUT: %bound_method.loc17_10.1: <bound method> = bound_method %.loc17_10.2, %impl.elem0
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @const.as.Copy.impl.Op(constants.%Copy.facet.d1a) [concrete = constants.%const.as.Copy.impl.Op.specific_fn]
// CHECK:STDOUT: %bound_method.loc17_10.2: <bound method> = bound_method %.loc17_10.2, %specific_fn
// CHECK:STDOUT: %const.as.Copy.impl.Op.call: init %const.20a = call %bound_method.loc17_10.2(%.loc17_10.2)
// CHECK:STDOUT: return %const.as.Copy.impl.Op.call
// CHECK:STDOUT: }
// CHECK:STDOUT:
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