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6911553067
This is an intermediate state in which the lexer delegates the responsibility for trivia lexing to the parser. Later, the parser will delegate this responsibility to SyntaxParsingContext which will hand it over to SyntaxParseAction, which will only lex the pieces if it is really necessary to do so.
49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
//===--- LexerState.h - Lexer State -----------------------------*- 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 the LexerState object.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_LEXERSTATE_H
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#define SWIFT_LEXERSTATE_H
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#include "llvm/ADT/Optional.h"
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#include "swift/Basic/SourceLoc.h"
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#include "swift/Parse/ParsedTrivia.h"
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namespace swift {
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class Lexer;
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/// Lexer state can be saved/restored to/from objects of this class.
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class LexerState {
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public:
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LexerState() {}
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bool isValid() const { return Loc.isValid(); }
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LexerState advance(unsigned Offset) const {
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assert(isValid());
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return LexerState(Loc.getAdvancedLoc(Offset));
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}
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private:
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explicit LexerState(SourceLoc Loc) : Loc(Loc) {}
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SourceLoc Loc;
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StringRef LeadingTrivia;
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friend class Lexer;
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};
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} // end namespace swift
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#endif
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