Coverage Report

Created: 2020-11-28 09:00

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/Format/FormatTokenLexer.h
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//===--- FormatTokenLexer.h - Format C++ code ----------------*- C++ ----*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// This file contains FormatTokenLexer, which tokenizes a source file
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/// into a token stream suitable for ClangFormat.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_FORMAT_FORMATTOKENLEXER_H
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#define LLVM_CLANG_LIB_FORMAT_FORMATTOKENLEXER_H
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#include "Encoding.h"
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#include "FormatToken.h"
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#include "clang/Basic/SourceLocation.h"
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#include "clang/Basic/SourceManager.h"
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#include "clang/Format/Format.h"
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#include "llvm/ADT/MapVector.h"
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#include "llvm/ADT/StringSet.h"
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#include "llvm/Support/Regex.h"
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#include <stack>
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namespace clang {
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namespace format {
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enum LexerState {
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  NORMAL,
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  TEMPLATE_STRING,
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  TOKEN_STASHED,
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};
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class FormatTokenLexer {
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public:
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  FormatTokenLexer(const SourceManager &SourceMgr, FileID ID, unsigned Column,
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                   const FormatStyle &Style, encoding::Encoding Encoding,
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                   llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator,
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                   IdentifierTable &IdentTable);
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  ArrayRef<FormatToken *> lex();
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  const AdditionalKeywords &getKeywords() { return Keywords; }
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private:
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  void tryMergePreviousTokens();
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  bool tryMergeLessLess();
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  bool tryMergeNSStringLiteral();
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  bool tryMergeJSPrivateIdentifier();
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  bool tryMergeCSharpStringLiteral();
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  bool tryMergeCSharpKeywordVariables();
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  bool tryMergeCSharpDoubleQuestion();
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  bool tryMergeCSharpNullConditional();
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  bool tryTransformCSharpForEach();
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  bool tryMergeForEach();
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  bool tryTransformTryUsageForC();
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  bool tryMergeTokens(ArrayRef<tok::TokenKind> Kinds, TokenType NewType);
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  // Returns \c true if \p Tok can only be followed by an operand in JavaScript.
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  bool precedesOperand(FormatToken *Tok);
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  bool canPrecedeRegexLiteral(FormatToken *Prev);
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  // Tries to parse a JavaScript Regex literal starting at the current token,
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  // if that begins with a slash and is in a location where JavaScript allows
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  // regex literals. Changes the current token to a regex literal and updates
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  // its text if successful.
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  void tryParseJSRegexLiteral();
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  // Handles JavaScript template strings.
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  //
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  // JavaScript template strings use backticks ('`') as delimiters, and allow
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  // embedding expressions nested in ${expr-here}. Template strings can be
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  // nested recursively, i.e. expressions can contain template strings in turn.
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  //
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  // The code below parses starting from a backtick, up to a closing backtick or
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  // an opening ${. It also maintains a stack of lexing contexts to handle
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  // nested template parts by balancing curly braces.
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  void handleTemplateStrings();
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  void handleCSharpVerbatimAndInterpolatedStrings();
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  void tryParsePythonComment();
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  bool tryMerge_TMacro();
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  bool tryMergeConflictMarkers();
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  FormatToken *getStashedToken();
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  FormatToken *getNextToken();
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  FormatToken *FormatTok;
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  bool IsFirstToken;
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  std::stack<LexerState> StateStack;
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  unsigned Column;
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  unsigned TrailingWhitespace;
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  std::unique_ptr<Lexer> Lex;
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  const SourceManager &SourceMgr;
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  FileID ID;
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  const FormatStyle &Style;
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  IdentifierTable &IdentTable;
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  AdditionalKeywords Keywords;
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  encoding::Encoding Encoding;
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  llvm::SpecificBumpPtrAllocator<FormatToken> &Allocator;
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  // Index (in 'Tokens') of the last token that starts a new line.
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  unsigned FirstInLineIndex;
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  SmallVector<FormatToken *, 16> Tokens;
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  llvm::SmallMapVector<IdentifierInfo *, TokenType, 8> Macros;
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  bool FormattingDisabled;
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  llvm::Regex MacroBlockBeginRegex;
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  llvm::Regex MacroBlockEndRegex;
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  // Targets that may appear inside a C# attribute.
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  static const llvm::StringSet<> CSharpAttributeTargets;
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  void readRawToken(FormatToken &Tok);
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  void resetLexer(unsigned Offset);
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};
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} // namespace format
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} // namespace clang
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#endif