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126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
//===--- ProtocolAssociations.h - Associated types/conformances -*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines types for representing types and conformances
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// associated with a protocol.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_AST_PROTOCOLASSOCIATIONS_H
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#define SWIFT_AST_PROTOCOLASSOCIATIONS_H
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#include "swift/AST/Decl.h"
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#include "llvm/ADT/DenseMapInfo.h"
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namespace swift {
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/// A base conformance of a protocol.
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class BaseConformance {
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ProtocolDecl *Source;
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ProtocolDecl *Requirement;
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public:
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explicit BaseConformance(ProtocolDecl *source,
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ProtocolDecl *requirement)
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: Source(source), Requirement(requirement) {
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assert(source && requirement);
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}
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ProtocolDecl *getSourceProtocol() const {
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return Source;
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}
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ProtocolDecl *getBaseRequirement() const {
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return Requirement;
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}
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};
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/// A conformance associated with a protocol.
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class AssociatedConformance {
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ProtocolDecl *Source;
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CanType Association;
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ProtocolDecl *Requirement;
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using SourceInfo = llvm::DenseMapInfo<ProtocolDecl*>;
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explicit AssociatedConformance(ProtocolDecl *specialValue)
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: Source(specialValue), Association(CanType()), Requirement(nullptr) {}
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public:
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explicit AssociatedConformance(ProtocolDecl *source, CanType association,
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ProtocolDecl *requirement)
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: Source(source), Association(association), Requirement(requirement) {
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assert(source && association && requirement);
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}
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ProtocolDecl *getSourceProtocol() const {
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return Source;
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}
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CanType getAssociation() const {
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return Association;
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}
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ProtocolDecl *getAssociatedRequirement() const {
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return Requirement;
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}
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friend bool operator==(const AssociatedConformance &lhs,
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const AssociatedConformance &rhs) {
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return lhs.Source == rhs.Source &&
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lhs.Association == rhs.Association &&
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lhs.Requirement == rhs.Requirement;
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}
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friend bool operator!=(const AssociatedConformance &lhs,
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const AssociatedConformance &rhs) {
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return !(lhs == rhs);
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}
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unsigned getHashValue() const {
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return hash_value(llvm::hash_combine(Source,
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Association.getPointer(),
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Requirement));
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}
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static AssociatedConformance getEmptyKey() {
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return AssociatedConformance(SourceInfo::getEmptyKey());
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}
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static AssociatedConformance getTombstoneKey() {
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return AssociatedConformance(SourceInfo::getTombstoneKey());
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}
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};
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} // end namespace swift
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namespace llvm {
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template <> struct DenseMapInfo<swift::AssociatedConformance> {
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static inline swift::AssociatedConformance getEmptyKey() {
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return swift::AssociatedConformance::getEmptyKey();
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}
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static inline swift::AssociatedConformance getTombstoneKey() {
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return swift::AssociatedConformance::getTombstoneKey();
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}
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static unsigned getHashValue(swift::AssociatedConformance val) {
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return val.getHashValue();
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}
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static bool isEqual(swift::AssociatedConformance lhs,
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swift::AssociatedConformance rhs) {
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return lhs == rhs;
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}
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};
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}
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#endif
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