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1d961ba22d
Although I don't plan to bring over new assertions wholesale into the current qualification branch, it's entirely possible that various minor changes in main will use the new assertions; having this basic support in the release branch will simplify that. (This is why I'm adding the includes as a separate pass from rewriting the individual assertions)
89 lines
2.7 KiB
C++
89 lines
2.7 KiB
C++
//===--- ConcreteDeclRef.cpp - Reference to a concrete decl ---------------===//
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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 implements the ConcreteDeclRef class, which provides a reference to
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// a declaration that is potentially specialized.
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//
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//===----------------------------------------------------------------------===//
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#include "swift/AST/ASTContext.h"
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#include "swift/AST/ConcreteDeclRef.h"
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#include "swift/AST/Decl.h"
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#include "swift/AST/GenericSignature.h"
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#include "swift/AST/ProtocolConformance.h"
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#include "swift/AST/SubstitutionMap.h"
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#include "swift/AST/Types.h"
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#include "swift/Basic/Assertions.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace swift;
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ConcreteDeclRef ConcreteDeclRef::getOverriddenDecl() const {
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auto *derivedDecl = getDecl();
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auto *baseDecl = derivedDecl->getOverriddenDecl();
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auto baseSig = baseDecl->getInnermostDeclContext()
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->getGenericSignatureOfContext();
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auto derivedSig = derivedDecl->getInnermostDeclContext()
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->getGenericSignatureOfContext();
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SubstitutionMap subs;
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if (baseSig) {
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subs = SubstitutionMap::getOverrideSubstitutions(baseDecl, derivedDecl);
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if (derivedSig)
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subs = subs.subst(getSubstitutions());
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}
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return ConcreteDeclRef(baseDecl, subs);
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}
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ConcreteDeclRef ConcreteDeclRef::getOverriddenDecl(ValueDecl *baseDecl) const {
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auto *derivedDecl = getDecl();
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if (baseDecl == derivedDecl) return *this;
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#ifndef NDEBUG
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{
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auto cur = derivedDecl;
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for (; cur && cur != baseDecl; cur = cur->getOverriddenDecl()) {}
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assert(cur && "decl is not an indirect override of baseDecl");
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}
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#endif
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if (!baseDecl->getInnermostDeclContext()->isGenericContext()) {
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return ConcreteDeclRef(baseDecl);
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}
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auto subs = SubstitutionMap::getOverrideSubstitutions(baseDecl, derivedDecl);
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if (auto derivedSubs = getSubstitutions()) {
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subs = subs.subst(derivedSubs);
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}
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return ConcreteDeclRef(baseDecl, subs);
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}
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void ConcreteDeclRef::dump(raw_ostream &os) const {
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if (!getDecl()) {
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os << "**NULL**";
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return;
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}
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getDecl()->dumpRef(os);
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// If specialized, dump the substitutions.
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if (isSpecialized()) {
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os << " [with ";
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getSubstitutions().dump(os, SubstitutionMap::DumpStyle::Minimal);
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os << ']';
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}
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}
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void ConcreteDeclRef::dump() const {
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dump(llvm::errs());
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}
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