mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-24 22:02:23 +01:00
Richard SmithandGeoff Romer
ce50f181f1
When a `var` is not explicitly given an initializer, initialize it in one of two ways: * If its type implements the new interface `Core.Default`, call `Core.Default.Op` to initialize it. * Otherwise, if its type implements `UnformedInit`, leave it in an unformed state. For now, this is always an uninitialized state, but that will change in the future. * If neither of those apply, the `var` declaration is ill-formed. This is a step towards implementing leads decision #6739 and proposals #257 and #5913. Assisted-by: Gemini 3.1 Pro via Antigravity --------- Co-authored-by: Geoff Romer <gromer@google.com>
78 lines
3.9 KiB
Plaintext
78 lines
3.9 KiB
Plaintext
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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// Exceptions. See /LICENSE for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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// INCLUDE-FILE: toolchain/testing/testdata/min_prelude/none.carbon
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// TODO: Add ranges and switch to "--dump-sem-ir-ranges=only".
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// EXTRA-ARGS: --dump-sem-ir-ranges=if-present
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//
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// AUTOUPDATE
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// TIP: To test this file alone, run:
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// TIP: bazel test //toolchain/testing:file_test --test_arg=--file_tests=toolchain/check/testdata/struct/fail_nested_incomplete.carbon
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// TIP: To dump output, run:
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// TIP: bazel run //toolchain/testing:file_test -- --dump_output --file_tests=toolchain/check/testdata/struct/fail_nested_incomplete.carbon
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class Incomplete;
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// CHECK:STDERR: fail_nested_incomplete.carbon:[[@LINE+7]]:8: error: binding pattern has incomplete type `{.a: Incomplete}` in name binding declaration [IncompleteTypeInBindingDecl]
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// CHECK:STDERR: var s: {.a: Incomplete};
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~
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// CHECK:STDERR: fail_nested_incomplete.carbon:[[@LINE-5]]:1: note: class was forward declared here [ClassForwardDeclaredHere]
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// CHECK:STDERR: class Incomplete;
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// CHECK:STDERR: ^~~~~~~~~~~~~~~~~
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// CHECK:STDERR:
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var s: {.a: Incomplete};
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var p: Incomplete* = &s.a;
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// CHECK:STDOUT: --- fail_nested_incomplete.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: %Incomplete: type = class_type @Incomplete [concrete]
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// CHECK:STDOUT: %struct_type.a: type = struct_type {.a: %Incomplete} [concrete]
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// CHECK:STDOUT: %ptr: type = ptr_type %Incomplete [concrete]
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// CHECK:STDOUT: %pattern_type: type = pattern_type %ptr [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: file {
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// CHECK:STDOUT: package: <namespace> = namespace [concrete] {
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// CHECK:STDOUT: .Incomplete = %Incomplete.decl
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// CHECK:STDOUT: .s = %s
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// CHECK:STDOUT: .p = %p
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Incomplete.decl: type = class_decl @Incomplete [concrete = constants.%Incomplete] {} {}
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %s.patt: <error> = ref_binding_pattern s [concrete]
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// CHECK:STDOUT: %s.var_patt: <error> = var_pattern %s.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %s.var: ref <error> = var %s.var_patt [concrete = <error>]
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// CHECK:STDOUT: %.loc24: type = splice_block %struct_type.a [concrete = constants.%struct_type.a] {
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// CHECK:STDOUT: %Incomplete.ref.loc24: type = name_ref Incomplete, %Incomplete.decl [concrete = constants.%Incomplete]
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// CHECK:STDOUT: %struct_type.a: type = struct_type {.a: %Incomplete} [concrete = constants.%struct_type.a]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %s: ref <error> = ref_binding s, <error> [concrete = <error>]
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// CHECK:STDOUT: name_binding_decl {
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// CHECK:STDOUT: %p.patt: %pattern_type = ref_binding_pattern p [concrete]
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// CHECK:STDOUT: %p.var_patt: %pattern_type = var_pattern %p.patt [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %p.var: ref %ptr = var %p.var_patt [concrete]
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// CHECK:STDOUT: %.loc26: type = splice_block %ptr [concrete = constants.%ptr] {
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// CHECK:STDOUT: %Incomplete.ref.loc26: type = name_ref Incomplete, %Incomplete.decl [concrete = constants.%Incomplete]
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// CHECK:STDOUT: %ptr: type = ptr_type %Incomplete.ref.loc26 [concrete = constants.%ptr]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %p: ref %ptr = ref_binding p, %p.var [concrete = %p.var]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: class @Incomplete;
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// CHECK:STDOUT:
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// CHECK:STDOUT: fn @__global_init() {
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// CHECK:STDOUT: !entry:
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// CHECK:STDOUT: assign file.%s.var, <error>
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// CHECK:STDOUT: %s.ref: ref <error> = name_ref s, file.%s [concrete = <error>]
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// CHECK:STDOUT: %a.ref: <error> = name_ref a, <error> [concrete = <error>]
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// CHECK:STDOUT: %addr: <error> = addr_of %a.ref [concrete = <error>]
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// CHECK:STDOUT: assign file.%p.var, <error>
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// CHECK:STDOUT: return
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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