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carbon-lang/toolchain/check/testdata/array/init_dependent_bound.carbon
T
Geoff Romer 4329a83e4c Form-aware textual format for return parameters and arguments (#6588) 
The key changes are:
- Function output parameters are now prefixed with `out`, and more
consistently formatted as named parameters.
- Function and inst output arguments are now written as part of the inst
form, rather than as one of the inst arguments.

As a drive-by fix, this also changes `Temporary::storage_id` from
`DestInstId` to `InstId`, because it doesn't represent an output
parameter of the `Temporary` inst itself.

See the review of
[#6532](https://github.com/carbon-language/carbon-lang/pull/6532) and
[this Discord
discussion](https://discord.com/channels/655572317891461132/999638000126394370/1458268977020141589)
for additional background.
2026-01-14 23:27:21 +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
//
// AUTOUPDATE
// TIP: To test this file alone, run:
// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/array/init_dependent_bound.carbon
// TIP: To dump output, run:
// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/array/init_dependent_bound.carbon
// --- generic_empty.carbon
library "[[@TEST_NAME]]";
fn G(T:! type) {
// We can initialize this without knowing T.
//@dump-sem-ir-begin
var arr: array(T, 0) = ();
//@dump-sem-ir-end
}
class C {}
fn H() {
G(C);
}
// --- fail_init_dependent_bound.carbon
library "[[@TEST_NAME]]";
fn F(N:! i32) {
// CHECK:STDERR: fail_init_dependent_bound.carbon:[[@LINE+4]]:28: error: cannot initialize array with dependent bound from a list of initializers [ArrayInitDependentBound]
// CHECK:STDERR: var arr: array(i32, N) = (1, 2, 3);
// CHECK:STDERR: ^~~~~~~~~
// CHECK:STDERR:
var arr: array(i32, N) = (1, 2, 3);
}
// --- fail_todo_init_template_dependent_bound.carbon
library "[[@TEST_NAME]]";
// TODO: This should be valid.
fn G(template N:! i32) {
//@dump-sem-ir-begin
// CHECK:STDERR: fail_todo_init_template_dependent_bound.carbon:[[@LINE+4]]:12: error: cannot evaluate type expression [TypeExprEvaluationFailure]
// CHECK:STDERR: var arr: array(i32, N) = (1, 2, 3);
// CHECK:STDERR: ^~~~~~~~~~~~~
// CHECK:STDERR:
var arr: array(i32, N) = (1, 2, 3);
//@dump-sem-ir-end
}
fn H() { G(3); }
// CHECK:STDOUT: --- generic_empty.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %T: type = symbolic_binding T, 0 [symbolic]
// CHECK:STDOUT: %empty_tuple.type: type = tuple_type () [concrete]
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [concrete]
// CHECK:STDOUT: %array_type.1b3: type = array_type %int_0, %T [symbolic]
// CHECK:STDOUT: %require_complete: <witness> = require_complete_type %array_type.1b3 [symbolic]
// CHECK:STDOUT: %pattern_type.bd6: type = pattern_type %array_type.1b3 [symbolic]
// CHECK:STDOUT: %empty_tuple: %empty_tuple.type = tuple_value () [concrete]
// CHECK:STDOUT: %array.ca4: %array_type.1b3 = tuple_value () [symbolic]
// CHECK:STDOUT: %Destroy.type: type = facet_type <@Destroy> [concrete]
// CHECK:STDOUT: %Destroy.Op.type: type = fn_type @Destroy.Op [concrete]
// CHECK:STDOUT: %DestroyOp.type: type = fn_type @DestroyOp [concrete]
// CHECK:STDOUT: %DestroyOp: %DestroyOp.type = struct_value () [concrete]
// CHECK:STDOUT: %custom_witness.809: <witness> = custom_witness (%DestroyOp), @Destroy [concrete]
// CHECK:STDOUT: %Destroy.facet.467: %Destroy.type = facet_value %array_type.1b3, (%custom_witness.809) [symbolic]
// CHECK:STDOUT: %.2c6: type = fn_type_with_self_type %Destroy.Op.type, %Destroy.facet.467 [symbolic]
// CHECK:STDOUT: %C: type = class_type @C [concrete]
// CHECK:STDOUT: %array_type.70a: type = array_type %int_0, %C [concrete]
// CHECK:STDOUT: %complete_type.95b: <witness> = complete_type_witness %array_type.70a [concrete]
// CHECK:STDOUT: %pattern_type.f2c: type = pattern_type %array_type.70a [concrete]
// CHECK:STDOUT: %array.40f: %array_type.70a = tuple_value () [concrete]
// CHECK:STDOUT: %Destroy.facet.565: %Destroy.type = facet_value %array_type.70a, (%custom_witness.809) [concrete]
// CHECK:STDOUT: %.165: type = fn_type_with_self_type %Destroy.Op.type, %Destroy.facet.565 [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @G(%T.loc4_6.2: type) {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %array_type.loc7_22.2: type = array_type constants.%int_0, %T.loc4_6.1 [symbolic = %array_type.loc7_22.2 (constants.%array_type.1b3)]
// CHECK:STDOUT: %require_complete: <witness> = require_complete_type %array_type.loc7_22.2 [symbolic = %require_complete (constants.%require_complete)]
// CHECK:STDOUT: %pattern_type: type = pattern_type %array_type.loc7_22.2 [symbolic = %pattern_type (constants.%pattern_type.bd6)]
// CHECK:STDOUT: %array: @G.%array_type.loc7_22.2 (%array_type.1b3) = tuple_value () [symbolic = %array (constants.%array.ca4)]
// CHECK:STDOUT: %Destroy.facet: %Destroy.type = facet_value %array_type.loc7_22.2, (constants.%custom_witness.809) [symbolic = %Destroy.facet (constants.%Destroy.facet.467)]
// CHECK:STDOUT: %.loc7_3.2: type = fn_type_with_self_type constants.%Destroy.Op.type, %Destroy.facet [symbolic = %.loc7_3.2 (constants.%.2c6)]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %arr.patt: @G.%pattern_type (%pattern_type.bd6) = ref_binding_pattern arr [concrete]
// CHECK:STDOUT: %arr.var_patt: @G.%pattern_type (%pattern_type.bd6) = var_pattern %arr.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr.var: ref @G.%array_type.loc7_22.2 (%array_type.1b3) = var %arr.var_patt
// CHECK:STDOUT: %.loc7_27.1: %empty_tuple.type = tuple_literal () [concrete = constants.%empty_tuple]
// CHECK:STDOUT: %.loc7_27.2: init @G.%array_type.loc7_22.2 (%array_type.1b3) to %arr.var = array_init () [symbolic = %array (constants.%array.ca4)]
// CHECK:STDOUT: %.loc7_3.1: init @G.%array_type.loc7_22.2 (%array_type.1b3) = converted %.loc7_27.1, %.loc7_27.2 [symbolic = %array (constants.%array.ca4)]
// CHECK:STDOUT: assign %arr.var, %.loc7_3.1
// CHECK:STDOUT: %.loc7_22: type = splice_block %array_type.loc7_22.1 [symbolic = %array_type.loc7_22.2 (constants.%array_type.1b3)] {
// CHECK:STDOUT: %T.ref: type = name_ref T, %T.loc4_6.2 [symbolic = %T.loc4_6.1 (constants.%T)]
// CHECK:STDOUT: %int_0: Core.IntLiteral = int_value 0 [concrete = constants.%int_0]
// CHECK:STDOUT: %array_type.loc7_22.1: type = array_type %int_0, %T.ref [symbolic = %array_type.loc7_22.2 (constants.%array_type.1b3)]
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr: ref @G.%array_type.loc7_22.2 (%array_type.1b3) = ref_binding arr, %arr.var
// CHECK:STDOUT: %DestroyOp.bound: <bound method> = bound_method %arr.var, constants.%DestroyOp
// CHECK:STDOUT: %DestroyOp.call: init %empty_tuple.type = call %DestroyOp.bound(%arr.var)
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: fn @DestroyOp(%self.param: @G.%array_type.loc7_22.2 (%array_type.1b3)) = "no_op";
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%T) {
// CHECK:STDOUT: %T.loc4_6.1 => constants.%T
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%C) {
// CHECK:STDOUT: %T.loc4_6.1 => constants.%C
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %array_type.loc7_22.2 => constants.%array_type.70a
// CHECK:STDOUT: %require_complete => constants.%complete_type.95b
// CHECK:STDOUT: %pattern_type => constants.%pattern_type.f2c
// CHECK:STDOUT: %array => constants.%array.40f
// CHECK:STDOUT: %Destroy.facet => constants.%Destroy.facet.565
// CHECK:STDOUT: %.loc7_3.2 => constants.%.165
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: --- fail_todo_init_template_dependent_bound.carbon
// CHECK:STDOUT:
// CHECK:STDOUT: constants {
// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
// CHECK:STDOUT: %N.5de: %i32 = symbolic_binding N, 0, template [template]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete]
// CHECK:STDOUT: %int_3.1ba: Core.IntLiteral = int_value 3 [concrete]
// CHECK:STDOUT: %tuple.type: type = tuple_type (Core.IntLiteral, Core.IntLiteral, Core.IntLiteral) [concrete]
// CHECK:STDOUT: %tuple: %tuple.type = tuple_value (%int_1, %int_2, %int_3.1ba) [concrete]
// CHECK:STDOUT: %ImplicitAs.type.139: type = facet_type <@ImplicitAs, @ImplicitAs(Core.IntLiteral)> [concrete]
// CHECK:STDOUT: %ImplicitAs.Convert.type.71e: type = fn_type @ImplicitAs.Convert, @ImplicitAs(Core.IntLiteral) [concrete]
// CHECK:STDOUT: %From: Core.IntLiteral = symbolic_binding From, 0 [symbolic]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.type.2ed: type = fn_type @Int.as.ImplicitAs.impl.Convert, @Int.as.ImplicitAs.impl(%From) [symbolic]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.d29: %Int.as.ImplicitAs.impl.Convert.type.2ed = struct_value () [symbolic]
// CHECK:STDOUT: %int_3.822: %i32 = int_value 3 [concrete]
// CHECK:STDOUT: %ImplicitAs.impl_witness.640: <witness> = impl_witness imports.%ImplicitAs.impl_witness_table.ea2, @Int.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.type.240: type = fn_type @Int.as.ImplicitAs.impl.Convert, @Int.as.ImplicitAs.impl(%int_32) [concrete]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.dd4: %Int.as.ImplicitAs.impl.Convert.type.240 = struct_value () [concrete]
// CHECK:STDOUT: %ImplicitAs.facet.290: %ImplicitAs.type.139 = facet_value %i32, (%ImplicitAs.impl_witness.640) [concrete]
// CHECK:STDOUT: %.71e: type = fn_type_with_self_type %ImplicitAs.Convert.type.71e, %ImplicitAs.facet.290 [concrete]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.bound: <bound method> = bound_method %int_3.822, %Int.as.ImplicitAs.impl.Convert.dd4 [concrete]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.specific_fn: <specific function> = specific_function %Int.as.ImplicitAs.impl.Convert.dd4, @Int.as.ImplicitAs.impl.Convert(%int_32) [concrete]
// CHECK:STDOUT: %bound_method.17a: <bound method> = bound_method %int_3.822, %Int.as.ImplicitAs.impl.Convert.specific_fn [concrete]
// CHECK:STDOUT: %inst.splice_block: <instruction> = inst_value [concrete] {
// CHECK:STDOUT: %.236: Core.IntLiteral = splice_block %.f35 [concrete = %int_3.1ba] {
// CHECK:STDOUT: %impl.elem0: %.71e = impl_witness_access %ImplicitAs.impl_witness.640, element0 [concrete = %Int.as.ImplicitAs.impl.Convert.dd4]
// CHECK:STDOUT: %bound_method.41c: <bound method> = bound_method %int_3.822, %impl.elem0 [concrete = %Int.as.ImplicitAs.impl.Convert.bound]
// CHECK:STDOUT: %specific_fn: <specific function> = specific_function %impl.elem0, @Int.as.ImplicitAs.impl.Convert(%int_32) [concrete = %Int.as.ImplicitAs.impl.Convert.specific_fn]
// CHECK:STDOUT: %bound_method.ffb: <bound method> = bound_method %int_3.822, %specific_fn [concrete = %bound_method.17a]
// CHECK:STDOUT: %Int.as.ImplicitAs.impl.Convert.call: init Core.IntLiteral = call %bound_method.ffb(%int_3.822) [concrete = %int_3.1ba]
// CHECK:STDOUT: %.43d: Core.IntLiteral = value_of_initializer %Int.as.ImplicitAs.impl.Convert.call [concrete = %int_3.1ba]
// CHECK:STDOUT: %.f35: Core.IntLiteral = converted %int_3.822, %.43d [concrete = %int_3.1ba]
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: imports {
// CHECK:STDOUT: %Core.import_ref.0bc: @Int.as.ImplicitAs.impl.%Int.as.ImplicitAs.impl.Convert.type (%Int.as.ImplicitAs.impl.Convert.type.2ed) = import_ref Core//prelude/parts/int, loc{{\d+_\d+}}, loaded [symbolic = @Int.as.ImplicitAs.impl.%Int.as.ImplicitAs.impl.Convert (constants.%Int.as.ImplicitAs.impl.Convert.d29)]
// CHECK:STDOUT: %ImplicitAs.impl_witness_table.ea2 = impl_witness_table (%Core.import_ref.0bc), @Int.as.ImplicitAs.impl [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: generic fn @G(%N.loc5_15.2: %i32) {
// CHECK:STDOUT: <elided>
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %.loc11_23.2: <instruction> = convert_to_value_action %N.ref, Core.IntLiteral [template]
// CHECK:STDOUT:
// CHECK:STDOUT: fn() {
// CHECK:STDOUT: !entry:
// CHECK:STDOUT: name_binding_decl {
// CHECK:STDOUT: %arr.patt: <error> = ref_binding_pattern arr [concrete]
// CHECK:STDOUT: %arr.var_patt: <error> = var_pattern %arr.patt [concrete]
// CHECK:STDOUT: }
// CHECK:STDOUT: %arr.var: ref <error> = var %arr.var_patt [concrete = <error>]
// CHECK:STDOUT: %int_1: Core.IntLiteral = int_value 1 [concrete = constants.%int_1]
// CHECK:STDOUT: %int_2: Core.IntLiteral = int_value 2 [concrete = constants.%int_2]
// CHECK:STDOUT: %int_3: Core.IntLiteral = int_value 3 [concrete = constants.%int_3.1ba]
// CHECK:STDOUT: %.loc11_36: %tuple.type = tuple_literal (%int_1, %int_2, %int_3) [concrete = constants.%tuple]
// CHECK:STDOUT: assign %arr.var, <error>
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: %arr: ref <error> = ref_binding arr, <error> [concrete = <error>]
// CHECK:STDOUT: <elided>
// CHECK:STDOUT: }
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%N.5de) {
// CHECK:STDOUT: %N.loc5_15.1 => constants.%N.5de
// CHECK:STDOUT: }
// CHECK:STDOUT:
// CHECK:STDOUT: specific @G(constants.%int_3.822) {
// CHECK:STDOUT: %N.loc5_15.1 => constants.%int_3.822
// CHECK:STDOUT:
// CHECK:STDOUT: !definition:
// CHECK:STDOUT: %.loc11_23.2 => constants.%inst.splice_block
// CHECK:STDOUT: }
// CHECK:STDOUT:
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