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carbon-lang/toolchain/check/testdata/tuple/access/fail_non_tuple_access.carbon
T
Richard Smith 5b884ae14d Improve lowering for global variables. (#5492) 
- Track the `VarPattern` instruction on the `VarStorage` instruction so
that it's available for name mangling.
- Mangle global variables based on the first binding name within their
pattern.
- Give global variables external rather than internal linkage, except if
they have no bindings whatsoever in their pattern.
- To support lowering references to bindings nested within a global var,
such as for `var (x: i32, b: i32)`, add some basic initial support for
reference constant expressions. Treat a global `var` as a reference
constant, and treat an aggregate access into a reference constant as a
reference constant.
2025-05-21 00:09:10 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/tuple/access/fail_non_tuple_access.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/tuple/access/fail_non_tuple_access.carbon
fn Main() {
// CHECK:STDERR: fail_non_tuple_access.carbon:[[@LINE+4]]:3: error: type `Core.IntLiteral` does not support indexing [TypeNotIndexable]
// CHECK:STDERR: 0[1];
// CHECK:STDERR: ^~~~
// CHECK:STDERR:
0[1];
var non_tuple: array(i32, 2) = (5, 5);
// CHECK:STDERR: fail_non_tuple_access.carbon:[[@LINE+4]]:20: error: type `array(i32, 2)` does not support tuple indexing; only tuples can be indexed that way [TupleIndexOnANonTupleType]
// CHECK:STDERR: var first: i32 = non_tuple.0;
// CHECK:STDERR: ^~~~~~~~~~~
// CHECK:STDERR:
var first: i32 = non_tuple.0;
}
// CHECK:STDOUT: --- fail_non_tuple_access.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %Main.type: type = fn_type @Main [concrete]
// CHECK:STDOUT: %Main: %Main.type = struct_value () [concrete]
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [concrete]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT: %IndexWith.type.504: type = generic_interface_type @IndexWith [concrete]
// CHECK:STDOUT: %IndexWith.generic: %IndexWith.type.504 = struct_value () [concrete]
// 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: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT: %array_type: type = array_type %int_2, %i32 [concrete]
// CHECK:STDOUT: %pattern_type.ae7: type = pattern_type %array_type [concrete]
// CHECK:STDOUT: %int_5.64b: Core.IntLiteral = int_value 5 [concrete]
// CHECK:STDOUT: %tuple.type: type = tuple_type (Core.IntLiteral, Core.IntLiteral) [concrete]
// CHECK:STDOUT: %ImplicitAs.type.cc7: type = generic_interface_type @ImplicitAs [concrete]
// CHECK:STDOUT: %ImplicitAs.generic: %ImplicitAs.type.cc7 = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.type.205: type = facet_type <@ImplicitAs, @ImplicitAs(%i32)> [concrete]
// CHECK:STDOUT: %Convert.type.1b6: type = fn_type @Convert.1, @ImplicitAs(%i32) [concrete]
// CHECK:STDOUT: %To.c80: Core.IntLiteral = bind_symbolic_name To, 0 [symbolic]
// CHECK:STDOUT: %Convert.type.0f9: type = fn_type @Convert.2, @impl.4f9(%To.c80) [symbolic]
// CHECK:STDOUT: %Convert.f06: %Convert.type.0f9 = struct_value () [symbolic]
// CHECK:STDOUT: %ImplicitAs.impl_witness.c75: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.a2f, @impl.4f9(%int_32) [concrete]
// CHECK:STDOUT: %Convert.type.035: type = fn_type @Convert.2, @impl.4f9(%int_32) [concrete]
// CHECK:STDOUT: %Convert.956: %Convert.type.035 = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet: %ImplicitAs.type.205 = facet_value Core.IntLiteral, (%ImplicitAs.impl_witness.c75) [concrete]
// CHECK:STDOUT: %.9c3: type = fn_type_with_self_type %Convert.type.1b6, %ImplicitAs.facet [concrete]
// CHECK:STDOUT: %Convert.bound: <bound method> = bound_method %int_5.64b, %Convert.956 [concrete]
// CHECK:STDOUT: %pattern_type.7ce: type = pattern_type %i32 [concrete]
// CHECK:STDOUT: %Convert.specific_fn: <specific function> = specific_function %Convert.956, @Convert.2(%int_32) [concrete]
// CHECK:STDOUT: %bound_method: <bound method> = bound_method %int_5.64b, %Convert.specific_fn [concrete]
// CHECK:STDOUT: %int_5.0f6: %i32 = int_value 5 [concrete]
// CHECK:STDOUT: %array: %array_type = tuple_value (%int_5.0f6, %int_5.0f6) [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
// CHECK:STDOUT: .IndexWith = %Core.IndexWith
// CHECK:STDOUT: .Int = %Core.Int
// CHECK:STDOUT: .ImplicitAs = %Core.ImplicitAs
// CHECK:STDOUT: import Core//prelude
// CHECK:STDOUT: import Core//prelude/...
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.IndexWith: %IndexWith.type.504 = import_ref Core//prelude/operators/index, IndexWith, loaded [concrete = constants.%IndexWith.generic]
// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/types/int, Int, loaded [concrete = constants.%Int.generic]
// CHECK:STDOUT: %Core.ImplicitAs: %ImplicitAs.type.cc7 = import_ref Core//prelude/operators/as, ImplicitAs, loaded [concrete = constants.%ImplicitAs.generic]
// CHECK:STDOUT: %Core.import_ref.a5b: @impl.4f9.%Convert.type (%Convert.type.0f9) = import_ref Core//prelude/types/int, loc19_39, loaded [symbolic = @impl.4f9.%Convert (constants.%Convert.f06)]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.a2f = impl_witness_table (%Core.import_ref.a5b), @impl.4f9 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: file {
// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
// CHECK:STDOUT: .Core = imports.%Core
// CHECK:STDOUT: .Main = %Main.decl
// CHECK:STDOUT: }
// CHECK:STDOUT: %Core.import = import Core
// CHECK:STDOUT: %Main.decl: %Main.type = fn_decl @Main [concrete = constants.%Main] {} {}
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @Main() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: %int_0.loc16: Core.IntLiteral = int_value 0 [concrete = constants.%int_0]
// CHECK:STDOUT: %int_1.loc16: Core.IntLiteral = int_value 1 [concrete = constants.%int_1]
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %non_tuple.patt: %pattern_type.ae7 = binding_pattern non_tuple [concrete]
// CHECK:STDOUT: %non_tuple.var_patt: %pattern_type.ae7 = var_pattern %non_tuple.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %non_tuple.var: ref %array_type = var %non_tuple.var_patt
// CHECK:STDOUT: %int_5.loc18_35: Core.IntLiteral = int_value 5 [concrete = constants.%int_5.64b]
// CHECK:STDOUT: %int_5.loc18_38: Core.IntLiteral = int_value 5 [concrete = constants.%int_5.64b]
// CHECK:STDOUT: %.loc18_39.1: %tuple.type = tuple_literal (%int_5.loc18_35, %int_5.loc18_38)
// CHECK:STDOUT: %impl.elem0.loc18_39.1: %.9c3 = impl_witness_access constants.%ImplicitAs.impl_witness.c75, element0 [concrete = constants.%Convert.956]
// CHECK:STDOUT: %bound_method.loc18_39.1: <bound method> = bound_method %int_5.loc18_35, %impl.elem0.loc18_39.1 [concrete = constants.%Convert.bound]
// CHECK:STDOUT: %specific_fn.loc18_39.1: <specific function> = specific_function %impl.elem0.loc18_39.1, @Convert.2(constants.%int_32) [concrete = constants.%Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc18_39.2: <bound method> = bound_method %int_5.loc18_35, %specific_fn.loc18_39.1 [concrete = constants.%bound_method]
// CHECK:STDOUT: %int.convert_checked.loc18_39.1: init %i32 = call %bound_method.loc18_39.2(%int_5.loc18_35) [concrete = constants.%int_5.0f6]
// CHECK:STDOUT: %.loc18_39.2: init %i32 = converted %int_5.loc18_35, %int.convert_checked.loc18_39.1 [concrete = constants.%int_5.0f6]
// CHECK:STDOUT: %int_0.loc18: Core.IntLiteral = int_value 0 [concrete = constants.%int_0]
// CHECK:STDOUT: %.loc18_39.3: ref %i32 = array_index %non_tuple.var, %int_0.loc18
// CHECK:STDOUT: %.loc18_39.4: init %i32 = initialize_from %.loc18_39.2 to %.loc18_39.3 [concrete = constants.%int_5.0f6]
// CHECK:STDOUT: %impl.elem0.loc18_39.2: %.9c3 = impl_witness_access constants.%ImplicitAs.impl_witness.c75, element0 [concrete = constants.%Convert.956]
// CHECK:STDOUT: %bound_method.loc18_39.3: <bound method> = bound_method %int_5.loc18_38, %impl.elem0.loc18_39.2 [concrete = constants.%Convert.bound]
// CHECK:STDOUT: %specific_fn.loc18_39.2: <specific function> = specific_function %impl.elem0.loc18_39.2, @Convert.2(constants.%int_32) [concrete = constants.%Convert.specific_fn]
// CHECK:STDOUT: %bound_method.loc18_39.4: <bound method> = bound_method %int_5.loc18_38, %specific_fn.loc18_39.2 [concrete = constants.%bound_method]
// CHECK:STDOUT: %int.convert_checked.loc18_39.2: init %i32 = call %bound_method.loc18_39.4(%int_5.loc18_38) [concrete = constants.%int_5.0f6]
// CHECK:STDOUT: %.loc18_39.5: init %i32 = converted %int_5.loc18_38, %int.convert_checked.loc18_39.2 [concrete = constants.%int_5.0f6]
// CHECK:STDOUT: %int_1.loc18: Core.IntLiteral = int_value 1 [concrete = constants.%int_1]
// CHECK:STDOUT: %.loc18_39.6: ref %i32 = array_index %non_tuple.var, %int_1.loc18
// CHECK:STDOUT: %.loc18_39.7: init %i32 = initialize_from %.loc18_39.5 to %.loc18_39.6 [concrete = constants.%int_5.0f6]
// CHECK:STDOUT: %.loc18_39.8: init %array_type = array_init (%.loc18_39.4, %.loc18_39.7) to %non_tuple.var [concrete = constants.%array]
// CHECK:STDOUT: %.loc18_3: init %array_type = converted %.loc18_39.1, %.loc18_39.8 [concrete = constants.%array]
// CHECK:STDOUT: assign %non_tuple.var, %.loc18_3
// CHECK:STDOUT: %.loc18_30: type = splice_block %array_type [concrete = constants.%array_type] {
// CHECK:STDOUT: %int_32.loc18: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc18: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2]
// CHECK:STDOUT: %array_type: type = array_type %int_2, %i32.loc18 [concrete = constants.%array_type]
// CHECK:STDOUT: }
// CHECK:STDOUT: %non_tuple: ref %array_type = bind_name non_tuple, %non_tuple.var
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %first.patt: %pattern_type.7ce = binding_pattern first [concrete]
// CHECK:STDOUT: %first.var_patt: %pattern_type.7ce = var_pattern %first.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %first.var: ref %i32 = var %first.var_patt
// CHECK:STDOUT: %non_tuple.ref: ref %array_type = name_ref non_tuple, %non_tuple
// CHECK:STDOUT: %int_0.loc23: Core.IntLiteral = int_value 0 [concrete = constants.%int_0]
// CHECK:STDOUT: assign %first.var, <error>
// CHECK:STDOUT: %.loc23: type = splice_block %i32.loc23 [concrete = constants.%i32] {
// CHECK:STDOUT: %int_32.loc23: Core.IntLiteral = int_value 32 [concrete = constants.%int_32]
// CHECK:STDOUT: %i32.loc23: type = class_type @Int, @Int(constants.%int_32) [concrete = constants.%i32]
// CHECK:STDOUT: }
// CHECK:STDOUT: %first: ref %i32 = bind_name first, %first.var
// CHECK:STDOUT: return
// CHECK:STDOUT: }
// CHECK:STDOUT:
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