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josh11bandJosh L
c7a338be59
As of #5087, these terms are no longer synonyms. This change preserves the original meaning. --------- Co-authored-by: Josh L <josh11b@users.noreply.github.com>
99 lines
3.4 KiB
C++
99 lines
3.4 KiB
C++
// 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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#ifndef CARBON_TOOLCHAIN_SEM_IR_CLASS_H_
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#define CARBON_TOOLCHAIN_SEM_IR_CLASS_H_
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#include "toolchain/sem_ir/entity_with_params_base.h"
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#include "toolchain/sem_ir/ids.h"
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namespace Carbon::SemIR {
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// Class-specific fields.
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struct ClassFields {
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enum InheritanceKind : int8_t {
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// `abstract class`
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Abstract,
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// `base class`
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Base,
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// `class`
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Final,
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};
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// The following members always have values, and do not change throughout the
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// lifetime of the class.
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// The class type, which is the type of `Self` in the class definition.
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TypeId self_type_id;
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// The kind of inheritance that this class supports.
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// TODO: The rules here are not yet decided. See #3384.
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InheritanceKind inheritance_kind;
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// Whether this class or any base class has at least one virtual function.
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bool is_dynamic = false;
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// The following members are set at the `{` of the class definition.
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// The class scope.
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NameScopeId scope_id = NameScopeId::None;
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// The first block of the class body.
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// TODO: Handle control flow in the class body, such as if-expressions.
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InstBlockId body_block_id = InstBlockId::None;
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// The following members are accumulated throughout the class definition.
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// The adapted type declaration, if any. `None` if the class is not an
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// adapter. This is an AdaptDecl instruction.
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// TODO: Consider sharing the storage for `adapt_id` and `base_id`. A class
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// can't have both.
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InstId adapt_id = InstId::None;
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// The base class declaration. `None` if the class has no base class. This is
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// a BaseDecl instruction.
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InstId base_id = InstId::None;
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// The following members are set at the `}` of the class definition.
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// A `CompleteTypeWitness` instruction witnessing that this class type is
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// complete, and tracking its object representation. This has a value once the
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// class is defined. For an adapter, the object representation is the
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// non-adapter type that this class directly or transitively adapts.
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InstId complete_type_witness_id = InstId::None;
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// The virtual function table. `None` if the class has no (direct or
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// inherited) virtual functions.
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InstId vtable_id = InstId::None;
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};
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// A class. See EntityWithParamsBase regarding the inheritance here.
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struct Class : public EntityWithParamsBase,
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public ClassFields,
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public Printable<Class> {
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auto Print(llvm::raw_ostream& out) const -> void {
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out << "{";
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PrintBaseFields(out);
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out << "}";
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}
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// This is false until we reach the `}` of the class definition.
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auto is_complete() const -> bool {
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return complete_type_witness_id.has_value();
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}
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// Gets the type that this class type adapts. Returns `None` if there is no
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// such type, or if the class is not yet defined.
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auto GetAdaptedType(const File& file, SpecificId specific_id) const -> TypeId;
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// Gets the base class for this class type. Returns `None` if there is no
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// such type, or if the class is not yet defined.
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auto GetBaseType(const File& file, SpecificId specific_id) const -> TypeId;
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// Gets the object representation for this class. Returns `None` if the class
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// is not yet defined.
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auto GetObjectRepr(const File& file, SpecificId specific_id) const -> TypeId;
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};
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} // namespace Carbon::SemIR
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#endif // CARBON_TOOLCHAIN_SEM_IR_CLASS_H_
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