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56a923475f
Instead of having a heap-allocated RefCountedBox to store a SyntaxData's parent, reference-count SyntaxData itself. This has a couple of advantages: - When passing SyntaxData around, only a pointer needs to be passed instead of the entire struct contents. This is faster. - We can later introduce a SyntaxDataRef, which behaves similar to SyntaxData, but delegates the responsibility that the parent stays alive to the user. While sacrificing guaranteed memory safety, this means that SyntaxData can then be stack-allocated without any ref-counting overhead.
80 lines
2.0 KiB
C++
80 lines
2.0 KiB
C++
//===--- Syntax.cpp - Swift Syntax Implementation -------------------------===//
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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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#include "swift/Syntax/Syntax.h"
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#include "swift/Syntax/SyntaxData.h"
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#include "swift/Syntax/SyntaxVisitor.h"
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using namespace swift;
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using namespace swift::syntax;
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const RawSyntax *Syntax::getRaw() const { return Data->getRaw(); }
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SyntaxKind Syntax::getKind() const {
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return getRaw()->getKind();
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}
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void Syntax::print(llvm::raw_ostream &OS, SyntaxPrintOptions Opts) const {
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if (auto Raw = getRaw())
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Raw->print(OS, Opts);
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}
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void Syntax::dump() const {
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getRaw()->dump();
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}
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void Syntax::dump(llvm::raw_ostream &OS, unsigned Indent) const {
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getRaw()->dump(OS, 0);
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}
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bool Syntax::isType() const { return Data->isType(); }
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bool Syntax::isDecl() const { return Data->isDecl(); }
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bool Syntax::isStmt() const { return Data->isStmt(); }
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bool Syntax::isExpr() const { return Data->isExpr(); }
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bool Syntax::isToken() const {
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return getRaw()->isToken();
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}
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bool Syntax::isPattern() const { return Data->isPattern(); }
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bool Syntax::isUnknown() const { return Data->isUnknown(); }
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bool Syntax::isPresent() const {
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return getRaw()->isPresent();
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}
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bool Syntax::isMissing() const {
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return getRaw()->isMissing();
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}
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llvm::Optional<Syntax> Syntax::getParent() const {
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auto ParentData = getData()->getParent();
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if (!ParentData) {
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return None;
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}
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return Syntax(ParentData);
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}
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size_t Syntax::getNumChildren() const { return Data->getNumChildren(); }
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llvm::Optional<Syntax> Syntax::getChild(const size_t N) const {
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auto ChildData = Data->getChild(N);
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if (!ChildData) {
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return None;
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}
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return Syntax(ChildData);
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}
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