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1 //===--- UnwrappedLineFormatter.h - Format C++ code -------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 ///
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9 /// \file
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10 /// Implements a combinartorial exploration of all the different
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11 /// linebreaks unwrapped lines can be formatted in.
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12 ///
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13 //===----------------------------------------------------------------------===//
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14
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15 #ifndef LLVM_CLANG_LIB_FORMAT_UNWRAPPEDLINEFORMATTER_H
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16 #define LLVM_CLANG_LIB_FORMAT_UNWRAPPEDLINEFORMATTER_H
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17
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18 #include "ContinuationIndenter.h"
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19 #include "clang/Format/Format.h"
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20 #include <map>
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21
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22 namespace clang {
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23 namespace format {
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24
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25 class ContinuationIndenter;
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26 class WhitespaceManager;
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27
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28 class UnwrappedLineFormatter {
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29 public:
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30 UnwrappedLineFormatter(ContinuationIndenter *Indenter,
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31 WhitespaceManager *Whitespaces,
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32 const FormatStyle &Style,
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33 const AdditionalKeywords &Keywords,
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34 const SourceManager &SourceMgr,
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35 FormattingAttemptStatus *Status)
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36 : Indenter(Indenter), Whitespaces(Whitespaces), Style(Style),
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37 Keywords(Keywords), SourceMgr(SourceMgr), Status(Status) {}
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38
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39 /// Format the current block and return the penalty.
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40 unsigned format(const SmallVectorImpl<AnnotatedLine *> &Lines,
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41 bool DryRun = false, int AdditionalIndent = 0,
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42 bool FixBadIndentation = false, unsigned FirstStartColumn = 0,
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43 unsigned NextStartColumn = 0, unsigned LastStartColumn = 0);
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44
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45 private:
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46 /// Add a new line and the required indent before the first Token
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47 /// of the \c UnwrappedLine if there was no structural parsing error.
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48 void formatFirstToken(const AnnotatedLine &Line,
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49 const AnnotatedLine *PreviousLine,
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50 const SmallVectorImpl<AnnotatedLine *> &Lines,
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51 unsigned Indent, unsigned NewlineIndent);
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52
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53 /// Returns the column limit for a line, taking into account whether we
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54 /// need an escaped newline due to a continued preprocessor directive.
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55 unsigned getColumnLimit(bool InPPDirective,
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56 const AnnotatedLine *NextLine) const;
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57
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58 // Cache to store the penalty of formatting a vector of AnnotatedLines
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59 // starting from a specific additional offset. Improves performance if there
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60 // are many nested blocks.
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61 std::map<std::pair<const SmallVectorImpl<AnnotatedLine *> *, unsigned>,
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62 unsigned>
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63 PenaltyCache;
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64
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65 ContinuationIndenter *Indenter;
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66 WhitespaceManager *Whitespaces;
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67 const FormatStyle &Style;
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68 const AdditionalKeywords &Keywords;
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69 const SourceManager &SourceMgr;
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70 FormattingAttemptStatus *Status;
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71 };
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72 } // end namespace format
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73 } // end namespace clang
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74
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75 #endif // LLVM_CLANG_LIB_FORMAT_UNWRAPPEDLINEFORMATTER_H
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