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a356c89e92
Instead, reference count the SyntaxData's parent. This has a couple of advantages: 1. We eliminate a const_cast that was potentially unsafe 2. It more closely resembles the architecture on the Swift side 3. It has the potential to be optimised further if the parent can be accessed in an unsafe, non-reference-counted way
104 lines
2.7 KiB
C++
104 lines
2.7 KiB
C++
//===----------- TokenSyntax.h - Swift Token Interface ----------*- 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 contains the interface for a `TokenSyntax`, which is a token
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// that includes full-fidelity leading and trailing trivia.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_SYNTAX_TOKENSYNTAX_H
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#define SWIFT_SYNTAX_TOKENSYNTAX_H
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#include "swift/Syntax/RawSyntax.h"
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#include "swift/Syntax/References.h"
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#include "swift/Syntax/Syntax.h"
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#include "swift/Syntax/TokenKinds.h"
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#include "swift/Syntax/Trivia.h"
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namespace swift {
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namespace syntax {
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class TokenSyntax final : public Syntax {
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protected:
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void validate() const {
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assert(getRaw()->isToken());
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}
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public:
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TokenSyntax(const SyntaxData Data) : Syntax(Data) {}
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static TokenSyntax missingToken(const tok Kind, OwnedString Text) {
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return makeRoot<TokenSyntax>(RawSyntax::missing(Kind, Text));
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}
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Trivia getLeadingTrivia() const {
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return Trivia { getRaw()->getLeadingTrivia().vec() };
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}
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Trivia getTrailingTrivia() const {
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return Trivia { getRaw()->getTrailingTrivia().vec() };
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}
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TokenSyntax withLeadingTrivia(const Trivia &Trivia) const {
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auto NewRaw = getRaw()->withLeadingTrivia(Trivia.Pieces);
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return TokenSyntax(Data.replacingSelf(NewRaw));
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}
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TokenSyntax withTrailingTrivia(const Trivia &Trivia) const {
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auto NewRaw = getRaw()->withTrailingTrivia(Trivia.Pieces);
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return TokenSyntax(Data.replacingSelf(NewRaw));
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}
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/* TODO: If we really need them.
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bool isKeyword() const;
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bool isPunctuation() const;
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bool isOperator() const;
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bool isLiteral() const;
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*/
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bool isMissing() const {
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return getRaw()->isMissing();
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}
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tok getTokenKind() const {
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return getRaw()->getTokenKind();
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}
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StringRef getText() const {
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return getRaw()->getTokenText();
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}
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StringRef getIdentifierText() const {
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StringRef text = getText();
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if (text.front() == '`') {
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assert(text.back() == '`');
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return text.slice(1, text.size() - 1);
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}
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return text;
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}
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static bool kindof(SyntaxKind Kind) {
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return isTokenKind(Kind);
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}
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static bool classof(const Syntax *S) {
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return kindof(S->getKind());
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}
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};
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} // end namespace syntax
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} // end namespace swift
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#endif // SWIFT_SYNTAX_TOKENSYNTAX_H
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