mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-02 13:25:49 +01:00
Dana Jansens
fcae9610bd
The type `type` is now a `FacetType` inst with no constraints. This brings the model implemented in the toolchain into better alignment with the language design. The `SemIR::TypeType` struct remains as a scope for holding the `TypeInstId`, `ConstantId`, and `TypeId` constants, but is not an `InstKind` anymore. The `TypeType` inst looks a lot like singletons, but there are many `FacetType` insts so it doesn't quite fit that model. So we put it alongside singletons with a fixed inst id but refer to it as a more general "builtin" inst that is not a singleton. `Namespace::PackageInstId` is similar, and we group it with `TypeType` conceptually as another builtin instruction with a fixed id. No conversion is needed anymore to use a `type` as a facet, since types also have a `FacetType` type. This simplifies and removes a number of helpers and branches throughout the code. The `TypeType` inst is now part of the constant store, so we end up printing it in the constants block in every test. But it's also named `type` rather than `%type` to preserve the majority of existing formatting behaviour, though this does look different from other constants. Assisted-by: Opus 5 was used to generate a first draft and validate the refactoring. Though nearly everything non-trivial the tool wrote has been modified or rewritten.
87 lines
3.9 KiB
Plaintext
87 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/int.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/impl/empty.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/impl/empty.carbon
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interface Empty {
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}
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impl i32 as Empty {
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}
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// CHECK:STDOUT: --- empty.carbon
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// CHECK:STDOUT:
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// CHECK:STDOUT: constants {
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// CHECK:STDOUT: type: type = facet_type <type> [concrete]
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// CHECK:STDOUT: %Empty.type: type = facet_type <@Empty> [concrete]
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// CHECK:STDOUT: %Self: %Empty.type = symbolic_binding Self, 0 [symbolic]
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// CHECK:STDOUT: %int_32: Core.IntLiteral = int_value 32 [concrete]
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// CHECK:STDOUT: %Int.type: type = generic_class_type @Int [concrete]
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// CHECK:STDOUT: %Int.generic: %Int.type = struct_value () [concrete]
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// CHECK:STDOUT: %i32: type = class_type @Int, @Int(%int_32) [concrete]
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// CHECK:STDOUT: %.d34: <witness> = impl_self_witness %i32, @Empty [concrete]
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// CHECK:STDOUT: %Empty.impl_witness: <witness> = impl_witness @i32.as.Empty.impl.%Empty.impl_witness_table [concrete]
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// CHECK:STDOUT: %Empty.facet: %Empty.type = facet_value %i32, (%Empty.impl_witness) [concrete]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: imports {
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// CHECK:STDOUT: %Core: <namespace> = namespace file.%Core.import, [concrete] {
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// CHECK:STDOUT: .Int = %Core.Int
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// CHECK:STDOUT: import Core//prelude
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// CHECK:STDOUT: import Core//prelude/...
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.Int: %Int.type = import_ref Core//prelude/parts/int, Int, loaded [concrete = constants.%Int.generic]
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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: .Core = imports.%Core
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// CHECK:STDOUT: .Empty = %Empty.decl
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %Core.import = import Core
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// CHECK:STDOUT: %Empty.decl: type = interface_decl @Empty [concrete = constants.%Empty.type] {} {}
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// CHECK:STDOUT: impl_decl @i32.as.Empty.impl [concrete] {} {
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// CHECK:STDOUT: %i32: type = type_literal constants.%i32 [concrete = constants.%i32]
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// CHECK:STDOUT: %Empty.ref: type = name_ref Empty, file.%Empty.decl [concrete = constants.%Empty.type]
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// CHECK:STDOUT: }
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// CHECK:STDOUT: %.loc18: <witness> = impl_self_witness @i32.as.Empty.impl.%i32, @Empty [concrete = constants.%.d34]
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: interface @Empty {
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// CHECK:STDOUT: %Self: %Empty.type = symbolic_binding Self, 0 [symbolic = constants.%Self]
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// CHECK:STDOUT: %Empty.WithSelf.decl = interface_with_self_decl @Empty [concrete]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: .Self = %Self
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// CHECK:STDOUT: witness = ()
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// CHECK:STDOUT:
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// CHECK:STDOUT: !requires:
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: impl @i32.as.Empty.impl: %i32 as %Empty.ref {
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// CHECK:STDOUT: %Empty.impl_witness_table = impl_witness_table (), @i32.as.Empty.impl [concrete]
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// CHECK:STDOUT: %Empty.impl_witness: <witness> = impl_witness %Empty.impl_witness_table [concrete = constants.%Empty.impl_witness]
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// CHECK:STDOUT:
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// CHECK:STDOUT: !members:
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// CHECK:STDOUT: extend %Empty.ref
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// CHECK:STDOUT: witness = %Empty.impl_witness
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: specific @Empty.WithSelf(constants.%Self) {
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// CHECK:STDOUT: !definition:
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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// CHECK:STDOUT: specific @Empty.WithSelf(constants.%Empty.facet) {
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// CHECK:STDOUT: !definition:
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// CHECK:STDOUT: }
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// CHECK:STDOUT:
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