mirror of
https://github.com/apple/swift.git
synced 2025-12-21 12:14:44 +01:00
5a8d0744c3
Structurally prevent a number of common anti-patterns involving generic signatures by separating the interface into GenericSignature and the implementation into GenericSignatureBase. In particular, this allows the comparison operators to be deleted which forces callers to canonicalize the signature or ask to compare pointers explicitly.
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
//===--- ConcreteDeclRef.cpp - Reference to a concrete decl ---------------===//
|
|
//
|
|
// This source file is part of the Swift.org open source project
|
|
//
|
|
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
|
|
// Licensed under Apache License v2.0 with Runtime Library Exception
|
|
//
|
|
// See https://swift.org/LICENSE.txt for license information
|
|
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the ConcreteDeclRef class, which provides a reference to
|
|
// a declaration that is potentially specialized.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "swift/AST/ASTContext.h"
|
|
#include "swift/AST/ConcreteDeclRef.h"
|
|
#include "swift/AST/Decl.h"
|
|
#include "swift/AST/GenericSignature.h"
|
|
#include "swift/AST/ProtocolConformance.h"
|
|
#include "swift/AST/SubstitutionMap.h"
|
|
#include "swift/AST/Types.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace swift;
|
|
|
|
ConcreteDeclRef ConcreteDeclRef::getOverriddenDecl() const {
|
|
auto *derivedDecl = getDecl();
|
|
auto *baseDecl = derivedDecl->getOverriddenDecl();
|
|
|
|
auto baseSig = baseDecl->getInnermostDeclContext()
|
|
->getGenericSignatureOfContext();
|
|
auto derivedSig = derivedDecl->getInnermostDeclContext()
|
|
->getGenericSignatureOfContext();
|
|
|
|
SubstitutionMap subs;
|
|
if (baseSig) {
|
|
Optional<SubstitutionMap> derivedSubMap;
|
|
if (derivedSig)
|
|
derivedSubMap = getSubstitutions();
|
|
subs = SubstitutionMap::getOverrideSubstitutions(baseDecl, derivedDecl,
|
|
derivedSubMap);
|
|
}
|
|
return ConcreteDeclRef(baseDecl, subs);
|
|
}
|
|
|
|
void ConcreteDeclRef::dump(raw_ostream &os) {
|
|
if (!getDecl()) {
|
|
os << "**NULL**";
|
|
return;
|
|
}
|
|
|
|
getDecl()->dumpRef(os);
|
|
|
|
// If specialized, dump the substitutions.
|
|
if (isSpecialized()) {
|
|
os << " [with ";
|
|
getSubstitutions().dump(os, SubstitutionMap::DumpStyle::Minimal);
|
|
os << ']';
|
|
}
|
|
}
|
|
|
|
void ConcreteDeclRef::dump() {
|
|
dump(llvm::errs());
|
|
}
|