1 //===--- Format.cpp - Format C++ code -------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief This file implements functions declared in Format.h. This will be
12 /// split into separate files as we go.
14 //===----------------------------------------------------------------------===//
16 #include "clang/Format/Format.h"
17 #include "AffectedRangeManager.h"
18 #include "ContinuationIndenter.h"
19 #include "FormatInternal.h"
20 #include "FormatTokenLexer.h"
21 #include "NamespaceEndCommentsFixer.h"
22 #include "SortJavaScriptImports.h"
23 #include "TokenAnalyzer.h"
24 #include "TokenAnnotator.h"
25 #include "UnwrappedLineFormatter.h"
26 #include "UnwrappedLineParser.h"
27 #include "UsingDeclarationsSorter.h"
28 #include "WhitespaceManager.h"
29 #include "clang/Basic/Diagnostic.h"
30 #include "clang/Basic/DiagnosticOptions.h"
31 #include "clang/Basic/SourceManager.h"
32 #include "clang/Basic/VirtualFileSystem.h"
33 #include "clang/Lex/Lexer.h"
34 #include "llvm/ADT/STLExtras.h"
35 #include "llvm/Support/Allocator.h"
36 #include "llvm/Support/Debug.h"
37 #include "llvm/Support/Path.h"
38 #include "llvm/Support/Regex.h"
39 #include "llvm/Support/YAMLTraits.h"
44 #define DEBUG_TYPE "format-formatter"
46 using clang::format::FormatStyle;
48 LLVM_YAML_IS_SEQUENCE_VECTOR(clang::format::FormatStyle::IncludeCategory)
49 LLVM_YAML_IS_SEQUENCE_VECTOR(clang::format::FormatStyle::RawStringFormat)
53 template <> struct ScalarEnumerationTraits<FormatStyle::LanguageKind> {
54 static void enumeration(IO &IO, FormatStyle::LanguageKind &Value) {
55 IO.enumCase(Value, "Cpp", FormatStyle::LK_Cpp);
56 IO.enumCase(Value, "Java", FormatStyle::LK_Java);
57 IO.enumCase(Value, "JavaScript", FormatStyle::LK_JavaScript);
58 IO.enumCase(Value, "ObjC", FormatStyle::LK_ObjC);
59 IO.enumCase(Value, "Proto", FormatStyle::LK_Proto);
60 IO.enumCase(Value, "TableGen", FormatStyle::LK_TableGen);
61 IO.enumCase(Value, "TextProto", FormatStyle::LK_TextProto);
65 template <> struct ScalarEnumerationTraits<FormatStyle::LanguageStandard> {
66 static void enumeration(IO &IO, FormatStyle::LanguageStandard &Value) {
67 IO.enumCase(Value, "Cpp03", FormatStyle::LS_Cpp03);
68 IO.enumCase(Value, "C++03", FormatStyle::LS_Cpp03);
69 IO.enumCase(Value, "Cpp11", FormatStyle::LS_Cpp11);
70 IO.enumCase(Value, "C++11", FormatStyle::LS_Cpp11);
71 IO.enumCase(Value, "Auto", FormatStyle::LS_Auto);
75 template <> struct ScalarEnumerationTraits<FormatStyle::UseTabStyle> {
76 static void enumeration(IO &IO, FormatStyle::UseTabStyle &Value) {
77 IO.enumCase(Value, "Never", FormatStyle::UT_Never);
78 IO.enumCase(Value, "false", FormatStyle::UT_Never);
79 IO.enumCase(Value, "Always", FormatStyle::UT_Always);
80 IO.enumCase(Value, "true", FormatStyle::UT_Always);
81 IO.enumCase(Value, "ForIndentation", FormatStyle::UT_ForIndentation);
82 IO.enumCase(Value, "ForContinuationAndIndentation",
83 FormatStyle::UT_ForContinuationAndIndentation);
87 template <> struct ScalarEnumerationTraits<FormatStyle::JavaScriptQuoteStyle> {
88 static void enumeration(IO &IO, FormatStyle::JavaScriptQuoteStyle &Value) {
89 IO.enumCase(Value, "Leave", FormatStyle::JSQS_Leave);
90 IO.enumCase(Value, "Single", FormatStyle::JSQS_Single);
91 IO.enumCase(Value, "Double", FormatStyle::JSQS_Double);
95 template <> struct ScalarEnumerationTraits<FormatStyle::ShortFunctionStyle> {
96 static void enumeration(IO &IO, FormatStyle::ShortFunctionStyle &Value) {
97 IO.enumCase(Value, "None", FormatStyle::SFS_None);
98 IO.enumCase(Value, "false", FormatStyle::SFS_None);
99 IO.enumCase(Value, "All", FormatStyle::SFS_All);
100 IO.enumCase(Value, "true", FormatStyle::SFS_All);
101 IO.enumCase(Value, "Inline", FormatStyle::SFS_Inline);
102 IO.enumCase(Value, "InlineOnly", FormatStyle::SFS_InlineOnly);
103 IO.enumCase(Value, "Empty", FormatStyle::SFS_Empty);
107 template <> struct ScalarEnumerationTraits<FormatStyle::BinaryOperatorStyle> {
108 static void enumeration(IO &IO, FormatStyle::BinaryOperatorStyle &Value) {
109 IO.enumCase(Value, "All", FormatStyle::BOS_All);
110 IO.enumCase(Value, "true", FormatStyle::BOS_All);
111 IO.enumCase(Value, "None", FormatStyle::BOS_None);
112 IO.enumCase(Value, "false", FormatStyle::BOS_None);
113 IO.enumCase(Value, "NonAssignment", FormatStyle::BOS_NonAssignment);
117 template <> struct ScalarEnumerationTraits<FormatStyle::BraceBreakingStyle> {
118 static void enumeration(IO &IO, FormatStyle::BraceBreakingStyle &Value) {
119 IO.enumCase(Value, "Attach", FormatStyle::BS_Attach);
120 IO.enumCase(Value, "Linux", FormatStyle::BS_Linux);
121 IO.enumCase(Value, "Mozilla", FormatStyle::BS_Mozilla);
122 IO.enumCase(Value, "Stroustrup", FormatStyle::BS_Stroustrup);
123 IO.enumCase(Value, "Allman", FormatStyle::BS_Allman);
124 IO.enumCase(Value, "GNU", FormatStyle::BS_GNU);
125 IO.enumCase(Value, "WebKit", FormatStyle::BS_WebKit);
126 IO.enumCase(Value, "Custom", FormatStyle::BS_Custom);
131 struct ScalarEnumerationTraits<FormatStyle::BreakConstructorInitializersStyle> {
133 enumeration(IO &IO, FormatStyle::BreakConstructorInitializersStyle &Value) {
134 IO.enumCase(Value, "BeforeColon", FormatStyle::BCIS_BeforeColon);
135 IO.enumCase(Value, "BeforeComma", FormatStyle::BCIS_BeforeComma);
136 IO.enumCase(Value, "AfterColon", FormatStyle::BCIS_AfterColon);
141 struct ScalarEnumerationTraits<FormatStyle::PPDirectiveIndentStyle> {
142 static void enumeration(IO &IO, FormatStyle::PPDirectiveIndentStyle &Value) {
143 IO.enumCase(Value, "None", FormatStyle::PPDIS_None);
144 IO.enumCase(Value, "AfterHash", FormatStyle::PPDIS_AfterHash);
149 struct ScalarEnumerationTraits<FormatStyle::ReturnTypeBreakingStyle> {
150 static void enumeration(IO &IO, FormatStyle::ReturnTypeBreakingStyle &Value) {
151 IO.enumCase(Value, "None", FormatStyle::RTBS_None);
152 IO.enumCase(Value, "All", FormatStyle::RTBS_All);
153 IO.enumCase(Value, "TopLevel", FormatStyle::RTBS_TopLevel);
154 IO.enumCase(Value, "TopLevelDefinitions",
155 FormatStyle::RTBS_TopLevelDefinitions);
156 IO.enumCase(Value, "AllDefinitions", FormatStyle::RTBS_AllDefinitions);
161 struct ScalarEnumerationTraits<FormatStyle::DefinitionReturnTypeBreakingStyle> {
163 enumeration(IO &IO, FormatStyle::DefinitionReturnTypeBreakingStyle &Value) {
164 IO.enumCase(Value, "None", FormatStyle::DRTBS_None);
165 IO.enumCase(Value, "All", FormatStyle::DRTBS_All);
166 IO.enumCase(Value, "TopLevel", FormatStyle::DRTBS_TopLevel);
168 // For backward compatibility.
169 IO.enumCase(Value, "false", FormatStyle::DRTBS_None);
170 IO.enumCase(Value, "true", FormatStyle::DRTBS_All);
175 struct ScalarEnumerationTraits<FormatStyle::NamespaceIndentationKind> {
176 static void enumeration(IO &IO,
177 FormatStyle::NamespaceIndentationKind &Value) {
178 IO.enumCase(Value, "None", FormatStyle::NI_None);
179 IO.enumCase(Value, "Inner", FormatStyle::NI_Inner);
180 IO.enumCase(Value, "All", FormatStyle::NI_All);
184 template <> struct ScalarEnumerationTraits<FormatStyle::BracketAlignmentStyle> {
185 static void enumeration(IO &IO, FormatStyle::BracketAlignmentStyle &Value) {
186 IO.enumCase(Value, "Align", FormatStyle::BAS_Align);
187 IO.enumCase(Value, "DontAlign", FormatStyle::BAS_DontAlign);
188 IO.enumCase(Value, "AlwaysBreak", FormatStyle::BAS_AlwaysBreak);
190 // For backward compatibility.
191 IO.enumCase(Value, "true", FormatStyle::BAS_Align);
192 IO.enumCase(Value, "false", FormatStyle::BAS_DontAlign);
197 struct ScalarEnumerationTraits<FormatStyle::EscapedNewlineAlignmentStyle> {
198 static void enumeration(IO &IO,
199 FormatStyle::EscapedNewlineAlignmentStyle &Value) {
200 IO.enumCase(Value, "DontAlign", FormatStyle::ENAS_DontAlign);
201 IO.enumCase(Value, "Left", FormatStyle::ENAS_Left);
202 IO.enumCase(Value, "Right", FormatStyle::ENAS_Right);
204 // For backward compatibility.
205 IO.enumCase(Value, "true", FormatStyle::ENAS_Left);
206 IO.enumCase(Value, "false", FormatStyle::ENAS_Right);
210 template <> struct ScalarEnumerationTraits<FormatStyle::PointerAlignmentStyle> {
211 static void enumeration(IO &IO, FormatStyle::PointerAlignmentStyle &Value) {
212 IO.enumCase(Value, "Middle", FormatStyle::PAS_Middle);
213 IO.enumCase(Value, "Left", FormatStyle::PAS_Left);
214 IO.enumCase(Value, "Right", FormatStyle::PAS_Right);
216 // For backward compatibility.
217 IO.enumCase(Value, "true", FormatStyle::PAS_Left);
218 IO.enumCase(Value, "false", FormatStyle::PAS_Right);
223 struct ScalarEnumerationTraits<FormatStyle::SpaceBeforeParensOptions> {
224 static void enumeration(IO &IO,
225 FormatStyle::SpaceBeforeParensOptions &Value) {
226 IO.enumCase(Value, "Never", FormatStyle::SBPO_Never);
227 IO.enumCase(Value, "ControlStatements",
228 FormatStyle::SBPO_ControlStatements);
229 IO.enumCase(Value, "Always", FormatStyle::SBPO_Always);
231 // For backward compatibility.
232 IO.enumCase(Value, "false", FormatStyle::SBPO_Never);
233 IO.enumCase(Value, "true", FormatStyle::SBPO_ControlStatements);
237 template <> struct MappingTraits<FormatStyle> {
238 static void mapping(IO &IO, FormatStyle &Style) {
239 // When reading, read the language first, we need it for getPredefinedStyle.
240 IO.mapOptional("Language", Style.Language);
242 if (IO.outputting()) {
243 StringRef StylesArray[] = {"LLVM", "Google", "Chromium",
244 "Mozilla", "WebKit", "GNU"};
245 ArrayRef<StringRef> Styles(StylesArray);
246 for (size_t i = 0, e = Styles.size(); i < e; ++i) {
247 StringRef StyleName(Styles[i]);
248 FormatStyle PredefinedStyle;
249 if (getPredefinedStyle(StyleName, Style.Language, &PredefinedStyle) &&
250 Style == PredefinedStyle) {
251 IO.mapOptional("# BasedOnStyle", StyleName);
256 StringRef BasedOnStyle;
257 IO.mapOptional("BasedOnStyle", BasedOnStyle);
258 if (!BasedOnStyle.empty()) {
259 FormatStyle::LanguageKind OldLanguage = Style.Language;
260 FormatStyle::LanguageKind Language =
261 ((FormatStyle *)IO.getContext())->Language;
262 if (!getPredefinedStyle(BasedOnStyle, Language, &Style)) {
263 IO.setError(Twine("Unknown value for BasedOnStyle: ", BasedOnStyle));
266 Style.Language = OldLanguage;
270 // For backward compatibility.
271 if (!IO.outputting()) {
272 IO.mapOptional("AlignEscapedNewlinesLeft", Style.AlignEscapedNewlines);
273 IO.mapOptional("DerivePointerBinding", Style.DerivePointerAlignment);
274 IO.mapOptional("IndentFunctionDeclarationAfterType",
275 Style.IndentWrappedFunctionNames);
276 IO.mapOptional("PointerBindsToType", Style.PointerAlignment);
277 IO.mapOptional("SpaceAfterControlStatementKeyword",
278 Style.SpaceBeforeParens);
281 IO.mapOptional("AccessModifierOffset", Style.AccessModifierOffset);
282 IO.mapOptional("AlignAfterOpenBracket", Style.AlignAfterOpenBracket);
283 IO.mapOptional("AlignConsecutiveAssignments",
284 Style.AlignConsecutiveAssignments);
285 IO.mapOptional("AlignConsecutiveDeclarations",
286 Style.AlignConsecutiveDeclarations);
287 IO.mapOptional("AlignEscapedNewlines", Style.AlignEscapedNewlines);
288 IO.mapOptional("AlignOperands", Style.AlignOperands);
289 IO.mapOptional("AlignTrailingComments", Style.AlignTrailingComments);
290 IO.mapOptional("AllowAllParametersOfDeclarationOnNextLine",
291 Style.AllowAllParametersOfDeclarationOnNextLine);
292 IO.mapOptional("AllowShortBlocksOnASingleLine",
293 Style.AllowShortBlocksOnASingleLine);
294 IO.mapOptional("AllowShortCaseLabelsOnASingleLine",
295 Style.AllowShortCaseLabelsOnASingleLine);
296 IO.mapOptional("AllowShortFunctionsOnASingleLine",
297 Style.AllowShortFunctionsOnASingleLine);
298 IO.mapOptional("AllowShortIfStatementsOnASingleLine",
299 Style.AllowShortIfStatementsOnASingleLine);
300 IO.mapOptional("AllowShortLoopsOnASingleLine",
301 Style.AllowShortLoopsOnASingleLine);
302 IO.mapOptional("AlwaysBreakAfterDefinitionReturnType",
303 Style.AlwaysBreakAfterDefinitionReturnType);
304 IO.mapOptional("AlwaysBreakAfterReturnType",
305 Style.AlwaysBreakAfterReturnType);
306 // If AlwaysBreakAfterDefinitionReturnType was specified but
307 // AlwaysBreakAfterReturnType was not, initialize the latter from the
308 // former for backwards compatibility.
309 if (Style.AlwaysBreakAfterDefinitionReturnType != FormatStyle::DRTBS_None &&
310 Style.AlwaysBreakAfterReturnType == FormatStyle::RTBS_None) {
311 if (Style.AlwaysBreakAfterDefinitionReturnType == FormatStyle::DRTBS_All)
312 Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_AllDefinitions;
313 else if (Style.AlwaysBreakAfterDefinitionReturnType ==
314 FormatStyle::DRTBS_TopLevel)
315 Style.AlwaysBreakAfterReturnType =
316 FormatStyle::RTBS_TopLevelDefinitions;
319 IO.mapOptional("AlwaysBreakBeforeMultilineStrings",
320 Style.AlwaysBreakBeforeMultilineStrings);
321 IO.mapOptional("AlwaysBreakTemplateDeclarations",
322 Style.AlwaysBreakTemplateDeclarations);
323 IO.mapOptional("BinPackArguments", Style.BinPackArguments);
324 IO.mapOptional("BinPackParameters", Style.BinPackParameters);
325 IO.mapOptional("BraceWrapping", Style.BraceWrapping);
326 IO.mapOptional("BreakBeforeBinaryOperators",
327 Style.BreakBeforeBinaryOperators);
328 IO.mapOptional("BreakBeforeBraces", Style.BreakBeforeBraces);
329 IO.mapOptional("BreakBeforeInheritanceComma",
330 Style.BreakBeforeInheritanceComma);
331 IO.mapOptional("BreakBeforeTernaryOperators",
332 Style.BreakBeforeTernaryOperators);
334 bool BreakConstructorInitializersBeforeComma = false;
335 IO.mapOptional("BreakConstructorInitializersBeforeComma",
336 BreakConstructorInitializersBeforeComma);
337 IO.mapOptional("BreakConstructorInitializers",
338 Style.BreakConstructorInitializers);
339 // If BreakConstructorInitializersBeforeComma was specified but
340 // BreakConstructorInitializers was not, initialize the latter from the
341 // former for backwards compatibility.
342 if (BreakConstructorInitializersBeforeComma &&
343 Style.BreakConstructorInitializers == FormatStyle::BCIS_BeforeColon)
344 Style.BreakConstructorInitializers = FormatStyle::BCIS_BeforeComma;
346 IO.mapOptional("BreakAfterJavaFieldAnnotations",
347 Style.BreakAfterJavaFieldAnnotations);
348 IO.mapOptional("BreakStringLiterals", Style.BreakStringLiterals);
349 IO.mapOptional("ColumnLimit", Style.ColumnLimit);
350 IO.mapOptional("CommentPragmas", Style.CommentPragmas);
351 IO.mapOptional("CompactNamespaces", Style.CompactNamespaces);
352 IO.mapOptional("ConstructorInitializerAllOnOneLineOrOnePerLine",
353 Style.ConstructorInitializerAllOnOneLineOrOnePerLine);
354 IO.mapOptional("ConstructorInitializerIndentWidth",
355 Style.ConstructorInitializerIndentWidth);
356 IO.mapOptional("ContinuationIndentWidth", Style.ContinuationIndentWidth);
357 IO.mapOptional("Cpp11BracedListStyle", Style.Cpp11BracedListStyle);
358 IO.mapOptional("DerivePointerAlignment", Style.DerivePointerAlignment);
359 IO.mapOptional("DisableFormat", Style.DisableFormat);
360 IO.mapOptional("ExperimentalAutoDetectBinPacking",
361 Style.ExperimentalAutoDetectBinPacking);
362 IO.mapOptional("FixNamespaceComments", Style.FixNamespaceComments);
363 IO.mapOptional("ForEachMacros", Style.ForEachMacros);
364 IO.mapOptional("IncludeBlocks", Style.IncludeBlocks);
365 IO.mapOptional("IncludeCategories", Style.IncludeCategories);
366 IO.mapOptional("IncludeIsMainRegex", Style.IncludeIsMainRegex);
367 IO.mapOptional("IndentCaseLabels", Style.IndentCaseLabels);
368 IO.mapOptional("IndentPPDirectives", Style.IndentPPDirectives);
369 IO.mapOptional("IndentWidth", Style.IndentWidth);
370 IO.mapOptional("IndentWrappedFunctionNames",
371 Style.IndentWrappedFunctionNames);
372 IO.mapOptional("JavaScriptQuotes", Style.JavaScriptQuotes);
373 IO.mapOptional("JavaScriptWrapImports", Style.JavaScriptWrapImports);
374 IO.mapOptional("KeepEmptyLinesAtTheStartOfBlocks",
375 Style.KeepEmptyLinesAtTheStartOfBlocks);
376 IO.mapOptional("MacroBlockBegin", Style.MacroBlockBegin);
377 IO.mapOptional("MacroBlockEnd", Style.MacroBlockEnd);
378 IO.mapOptional("MaxEmptyLinesToKeep", Style.MaxEmptyLinesToKeep);
379 IO.mapOptional("NamespaceIndentation", Style.NamespaceIndentation);
380 IO.mapOptional("ObjCBlockIndentWidth", Style.ObjCBlockIndentWidth);
381 IO.mapOptional("ObjCSpaceAfterProperty", Style.ObjCSpaceAfterProperty);
382 IO.mapOptional("ObjCSpaceBeforeProtocolList",
383 Style.ObjCSpaceBeforeProtocolList);
384 IO.mapOptional("PenaltyBreakAssignment", Style.PenaltyBreakAssignment);
385 IO.mapOptional("PenaltyBreakBeforeFirstCallParameter",
386 Style.PenaltyBreakBeforeFirstCallParameter);
387 IO.mapOptional("PenaltyBreakComment", Style.PenaltyBreakComment);
388 IO.mapOptional("PenaltyBreakFirstLessLess",
389 Style.PenaltyBreakFirstLessLess);
390 IO.mapOptional("PenaltyBreakString", Style.PenaltyBreakString);
391 IO.mapOptional("PenaltyExcessCharacter", Style.PenaltyExcessCharacter);
392 IO.mapOptional("PenaltyReturnTypeOnItsOwnLine",
393 Style.PenaltyReturnTypeOnItsOwnLine);
394 IO.mapOptional("PointerAlignment", Style.PointerAlignment);
395 IO.mapOptional("RawStringFormats", Style.RawStringFormats);
396 IO.mapOptional("ReflowComments", Style.ReflowComments);
397 IO.mapOptional("SortIncludes", Style.SortIncludes);
398 IO.mapOptional("SortUsingDeclarations", Style.SortUsingDeclarations);
399 IO.mapOptional("SpaceAfterCStyleCast", Style.SpaceAfterCStyleCast);
400 IO.mapOptional("SpaceAfterTemplateKeyword",
401 Style.SpaceAfterTemplateKeyword);
402 IO.mapOptional("SpaceBeforeAssignmentOperators",
403 Style.SpaceBeforeAssignmentOperators);
404 IO.mapOptional("SpaceBeforeParens", Style.SpaceBeforeParens);
405 IO.mapOptional("SpaceInEmptyParentheses", Style.SpaceInEmptyParentheses);
406 IO.mapOptional("SpacesBeforeTrailingComments",
407 Style.SpacesBeforeTrailingComments);
408 IO.mapOptional("SpacesInAngles", Style.SpacesInAngles);
409 IO.mapOptional("SpacesInContainerLiterals",
410 Style.SpacesInContainerLiterals);
411 IO.mapOptional("SpacesInCStyleCastParentheses",
412 Style.SpacesInCStyleCastParentheses);
413 IO.mapOptional("SpacesInParentheses", Style.SpacesInParentheses);
414 IO.mapOptional("SpacesInSquareBrackets", Style.SpacesInSquareBrackets);
415 IO.mapOptional("Standard", Style.Standard);
416 IO.mapOptional("TabWidth", Style.TabWidth);
417 IO.mapOptional("UseTab", Style.UseTab);
421 template <> struct MappingTraits<FormatStyle::BraceWrappingFlags> {
422 static void mapping(IO &IO, FormatStyle::BraceWrappingFlags &Wrapping) {
423 IO.mapOptional("AfterClass", Wrapping.AfterClass);
424 IO.mapOptional("AfterControlStatement", Wrapping.AfterControlStatement);
425 IO.mapOptional("AfterEnum", Wrapping.AfterEnum);
426 IO.mapOptional("AfterFunction", Wrapping.AfterFunction);
427 IO.mapOptional("AfterNamespace", Wrapping.AfterNamespace);
428 IO.mapOptional("AfterObjCDeclaration", Wrapping.AfterObjCDeclaration);
429 IO.mapOptional("AfterStruct", Wrapping.AfterStruct);
430 IO.mapOptional("AfterUnion", Wrapping.AfterUnion);
431 IO.mapOptional("AfterExternBlock", Wrapping.AfterExternBlock);
432 IO.mapOptional("BeforeCatch", Wrapping.BeforeCatch);
433 IO.mapOptional("BeforeElse", Wrapping.BeforeElse);
434 IO.mapOptional("IndentBraces", Wrapping.IndentBraces);
435 IO.mapOptional("SplitEmptyFunction", Wrapping.SplitEmptyFunction);
436 IO.mapOptional("SplitEmptyRecord", Wrapping.SplitEmptyRecord);
437 IO.mapOptional("SplitEmptyNamespace", Wrapping.SplitEmptyNamespace);
441 template <> struct MappingTraits<FormatStyle::IncludeCategory> {
442 static void mapping(IO &IO, FormatStyle::IncludeCategory &Category) {
443 IO.mapOptional("Regex", Category.Regex);
444 IO.mapOptional("Priority", Category.Priority);
448 template <> struct ScalarEnumerationTraits<FormatStyle::IncludeBlocksStyle> {
449 static void enumeration(IO &IO, FormatStyle::IncludeBlocksStyle &Value) {
450 IO.enumCase(Value, "Preserve", FormatStyle::IBS_Preserve);
451 IO.enumCase(Value, "Merge", FormatStyle::IBS_Merge);
452 IO.enumCase(Value, "Regroup", FormatStyle::IBS_Regroup);
456 template <> struct MappingTraits<FormatStyle::RawStringFormat> {
457 static void mapping(IO &IO, FormatStyle::RawStringFormat &Format) {
458 IO.mapOptional("Delimiter", Format.Delimiter);
459 IO.mapOptional("Language", Format.Language);
460 IO.mapOptional("BasedOnStyle", Format.BasedOnStyle);
464 // Allows to read vector<FormatStyle> while keeping default values.
465 // IO.getContext() should contain a pointer to the FormatStyle structure, that
466 // will be used to get default values for missing keys.
467 // If the first element has no Language specified, it will be treated as the
468 // default one for the following elements.
469 template <> struct DocumentListTraits<std::vector<FormatStyle>> {
470 static size_t size(IO &IO, std::vector<FormatStyle> &Seq) {
473 static FormatStyle &element(IO &IO, std::vector<FormatStyle> &Seq,
475 if (Index >= Seq.size()) {
476 assert(Index == Seq.size());
477 FormatStyle Template;
478 if (!Seq.empty() && Seq[0].Language == FormatStyle::LK_None) {
481 Template = *((const FormatStyle *)IO.getContext());
482 Template.Language = FormatStyle::LK_None;
484 Seq.resize(Index + 1, Template);
495 const std::error_category &getParseCategory() {
496 static ParseErrorCategory C;
499 std::error_code make_error_code(ParseError e) {
500 return std::error_code(static_cast<int>(e), getParseCategory());
503 inline llvm::Error make_string_error(const llvm::Twine &Message) {
504 return llvm::make_error<llvm::StringError>(Message,
505 llvm::inconvertibleErrorCode());
508 const char *ParseErrorCategory::name() const noexcept {
509 return "clang-format.parse_error";
512 std::string ParseErrorCategory::message(int EV) const {
513 switch (static_cast<ParseError>(EV)) {
514 case ParseError::Success:
516 case ParseError::Error:
517 return "Invalid argument";
518 case ParseError::Unsuitable:
521 llvm_unreachable("unexpected parse error");
524 static FormatStyle expandPresets(const FormatStyle &Style) {
525 if (Style.BreakBeforeBraces == FormatStyle::BS_Custom)
527 FormatStyle Expanded = Style;
528 Expanded.BraceWrapping = {false, false, false, false, false,
529 false, false, false, false, false,
530 false, false, true, true, true};
531 switch (Style.BreakBeforeBraces) {
532 case FormatStyle::BS_Linux:
533 Expanded.BraceWrapping.AfterClass = true;
534 Expanded.BraceWrapping.AfterFunction = true;
535 Expanded.BraceWrapping.AfterNamespace = true;
537 case FormatStyle::BS_Mozilla:
538 Expanded.BraceWrapping.AfterClass = true;
539 Expanded.BraceWrapping.AfterEnum = true;
540 Expanded.BraceWrapping.AfterFunction = true;
541 Expanded.BraceWrapping.AfterStruct = true;
542 Expanded.BraceWrapping.AfterUnion = true;
543 Expanded.BraceWrapping.AfterExternBlock = true;
544 Expanded.BraceWrapping.SplitEmptyFunction = true;
545 Expanded.BraceWrapping.SplitEmptyRecord = false;
547 case FormatStyle::BS_Stroustrup:
548 Expanded.BraceWrapping.AfterFunction = true;
549 Expanded.BraceWrapping.BeforeCatch = true;
550 Expanded.BraceWrapping.BeforeElse = true;
552 case FormatStyle::BS_Allman:
553 Expanded.BraceWrapping.AfterClass = true;
554 Expanded.BraceWrapping.AfterControlStatement = true;
555 Expanded.BraceWrapping.AfterEnum = true;
556 Expanded.BraceWrapping.AfterFunction = true;
557 Expanded.BraceWrapping.AfterNamespace = true;
558 Expanded.BraceWrapping.AfterObjCDeclaration = true;
559 Expanded.BraceWrapping.AfterStruct = true;
560 Expanded.BraceWrapping.AfterExternBlock = true;
561 Expanded.BraceWrapping.BeforeCatch = true;
562 Expanded.BraceWrapping.BeforeElse = true;
564 case FormatStyle::BS_GNU:
565 Expanded.BraceWrapping = {true, true, true, true, true, true, true, true,
566 true, true, true, true, true, true, true};
568 case FormatStyle::BS_WebKit:
569 Expanded.BraceWrapping.AfterFunction = true;
577 FormatStyle getLLVMStyle() {
578 FormatStyle LLVMStyle;
579 LLVMStyle.Language = FormatStyle::LK_Cpp;
580 LLVMStyle.AccessModifierOffset = -2;
581 LLVMStyle.AlignEscapedNewlines = FormatStyle::ENAS_Right;
582 LLVMStyle.AlignAfterOpenBracket = FormatStyle::BAS_Align;
583 LLVMStyle.AlignOperands = true;
584 LLVMStyle.AlignTrailingComments = true;
585 LLVMStyle.AlignConsecutiveAssignments = false;
586 LLVMStyle.AlignConsecutiveDeclarations = false;
587 LLVMStyle.AllowAllParametersOfDeclarationOnNextLine = true;
588 LLVMStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
589 LLVMStyle.AllowShortBlocksOnASingleLine = false;
590 LLVMStyle.AllowShortCaseLabelsOnASingleLine = false;
591 LLVMStyle.AllowShortIfStatementsOnASingleLine = false;
592 LLVMStyle.AllowShortLoopsOnASingleLine = false;
593 LLVMStyle.AlwaysBreakAfterReturnType = FormatStyle::RTBS_None;
594 LLVMStyle.AlwaysBreakAfterDefinitionReturnType = FormatStyle::DRTBS_None;
595 LLVMStyle.AlwaysBreakBeforeMultilineStrings = false;
596 LLVMStyle.AlwaysBreakTemplateDeclarations = false;
597 LLVMStyle.BinPackArguments = true;
598 LLVMStyle.BinPackParameters = true;
599 LLVMStyle.BreakBeforeBinaryOperators = FormatStyle::BOS_None;
600 LLVMStyle.BreakBeforeTernaryOperators = true;
601 LLVMStyle.BreakBeforeBraces = FormatStyle::BS_Attach;
602 LLVMStyle.BraceWrapping = {false, false, false, false, false,
603 false, false, false, false, false,
604 false, false, true, true, true};
605 LLVMStyle.BreakAfterJavaFieldAnnotations = false;
606 LLVMStyle.BreakConstructorInitializers = FormatStyle::BCIS_BeforeColon;
607 LLVMStyle.BreakBeforeInheritanceComma = false;
608 LLVMStyle.BreakStringLiterals = true;
609 LLVMStyle.ColumnLimit = 80;
610 LLVMStyle.CommentPragmas = "^ IWYU pragma:";
611 LLVMStyle.CompactNamespaces = false;
612 LLVMStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = false;
613 LLVMStyle.ConstructorInitializerIndentWidth = 4;
614 LLVMStyle.ContinuationIndentWidth = 4;
615 LLVMStyle.Cpp11BracedListStyle = true;
616 LLVMStyle.DerivePointerAlignment = false;
617 LLVMStyle.ExperimentalAutoDetectBinPacking = false;
618 LLVMStyle.FixNamespaceComments = true;
619 LLVMStyle.ForEachMacros.push_back("foreach");
620 LLVMStyle.ForEachMacros.push_back("Q_FOREACH");
621 LLVMStyle.ForEachMacros.push_back("BOOST_FOREACH");
622 LLVMStyle.IncludeCategories = {{"^\"(llvm|llvm-c|clang|clang-c)/", 2},
623 {"^(<|\"(gtest|gmock|isl|json)/)", 3},
625 LLVMStyle.IncludeIsMainRegex = "(Test)?$";
626 LLVMStyle.IncludeBlocks = FormatStyle::IBS_Preserve;
627 LLVMStyle.IndentCaseLabels = false;
628 LLVMStyle.IndentPPDirectives = FormatStyle::PPDIS_None;
629 LLVMStyle.IndentWrappedFunctionNames = false;
630 LLVMStyle.IndentWidth = 2;
631 LLVMStyle.JavaScriptQuotes = FormatStyle::JSQS_Leave;
632 LLVMStyle.JavaScriptWrapImports = true;
633 LLVMStyle.TabWidth = 8;
634 LLVMStyle.MaxEmptyLinesToKeep = 1;
635 LLVMStyle.KeepEmptyLinesAtTheStartOfBlocks = true;
636 LLVMStyle.NamespaceIndentation = FormatStyle::NI_None;
637 LLVMStyle.ObjCBlockIndentWidth = 2;
638 LLVMStyle.ObjCSpaceAfterProperty = false;
639 LLVMStyle.ObjCSpaceBeforeProtocolList = true;
640 LLVMStyle.PointerAlignment = FormatStyle::PAS_Right;
641 LLVMStyle.SpacesBeforeTrailingComments = 1;
642 LLVMStyle.Standard = FormatStyle::LS_Cpp11;
643 LLVMStyle.UseTab = FormatStyle::UT_Never;
644 LLVMStyle.RawStringFormats = {{"pb", FormatStyle::LK_TextProto, "google"}};
645 LLVMStyle.ReflowComments = true;
646 LLVMStyle.SpacesInParentheses = false;
647 LLVMStyle.SpacesInSquareBrackets = false;
648 LLVMStyle.SpaceInEmptyParentheses = false;
649 LLVMStyle.SpacesInContainerLiterals = true;
650 LLVMStyle.SpacesInCStyleCastParentheses = false;
651 LLVMStyle.SpaceAfterCStyleCast = false;
652 LLVMStyle.SpaceAfterTemplateKeyword = true;
653 LLVMStyle.SpaceBeforeParens = FormatStyle::SBPO_ControlStatements;
654 LLVMStyle.SpaceBeforeAssignmentOperators = true;
655 LLVMStyle.SpacesInAngles = false;
657 LLVMStyle.PenaltyBreakAssignment = prec::Assignment;
658 LLVMStyle.PenaltyBreakComment = 300;
659 LLVMStyle.PenaltyBreakFirstLessLess = 120;
660 LLVMStyle.PenaltyBreakString = 1000;
661 LLVMStyle.PenaltyExcessCharacter = 1000000;
662 LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 60;
663 LLVMStyle.PenaltyBreakBeforeFirstCallParameter = 19;
665 LLVMStyle.DisableFormat = false;
666 LLVMStyle.SortIncludes = true;
667 LLVMStyle.SortUsingDeclarations = true;
672 FormatStyle getGoogleStyle(FormatStyle::LanguageKind Language) {
673 if (Language == FormatStyle::LK_TextProto) {
674 FormatStyle GoogleStyle = getGoogleStyle(FormatStyle::LK_Proto);
675 GoogleStyle.Language = FormatStyle::LK_TextProto;
679 FormatStyle GoogleStyle = getLLVMStyle();
680 GoogleStyle.Language = Language;
682 GoogleStyle.AccessModifierOffset = -1;
683 GoogleStyle.AlignEscapedNewlines = FormatStyle::ENAS_Left;
684 GoogleStyle.AllowShortIfStatementsOnASingleLine = true;
685 GoogleStyle.AllowShortLoopsOnASingleLine = true;
686 GoogleStyle.AlwaysBreakBeforeMultilineStrings = true;
687 GoogleStyle.AlwaysBreakTemplateDeclarations = true;
688 GoogleStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
689 GoogleStyle.DerivePointerAlignment = true;
690 GoogleStyle.IncludeCategories = {
691 {"^<ext/.*\\.h>", 2}, {"^<.*\\.h>", 1}, {"^<.*", 2}, {".*", 3}};
692 GoogleStyle.IncludeIsMainRegex = "([-_](test|unittest))?$";
693 GoogleStyle.IndentCaseLabels = true;
694 GoogleStyle.KeepEmptyLinesAtTheStartOfBlocks = false;
695 GoogleStyle.ObjCSpaceAfterProperty = false;
696 GoogleStyle.ObjCSpaceBeforeProtocolList = false;
697 GoogleStyle.PointerAlignment = FormatStyle::PAS_Left;
698 GoogleStyle.SpacesBeforeTrailingComments = 2;
699 GoogleStyle.Standard = FormatStyle::LS_Auto;
701 GoogleStyle.PenaltyReturnTypeOnItsOwnLine = 200;
702 GoogleStyle.PenaltyBreakBeforeFirstCallParameter = 1;
704 if (Language == FormatStyle::LK_Java) {
705 GoogleStyle.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
706 GoogleStyle.AlignOperands = false;
707 GoogleStyle.AlignTrailingComments = false;
708 GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty;
709 GoogleStyle.AllowShortIfStatementsOnASingleLine = false;
710 GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
711 GoogleStyle.BreakBeforeBinaryOperators = FormatStyle::BOS_NonAssignment;
712 GoogleStyle.ColumnLimit = 100;
713 GoogleStyle.SpaceAfterCStyleCast = true;
714 GoogleStyle.SpacesBeforeTrailingComments = 1;
715 } else if (Language == FormatStyle::LK_JavaScript) {
716 GoogleStyle.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
717 GoogleStyle.AlignOperands = false;
718 GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty;
719 GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
720 GoogleStyle.BreakBeforeTernaryOperators = false;
721 // taze:, triple slash directives (`/// <...`), @tag followed by { for a lot
722 // of JSDoc tags, and @see, which is commonly followed by overlong URLs.
723 GoogleStyle.CommentPragmas =
724 "(taze:|^/[ \t]*<|(@[A-Za-z_0-9-]+[ \\t]*{)|@see)";
725 GoogleStyle.MaxEmptyLinesToKeep = 3;
726 GoogleStyle.NamespaceIndentation = FormatStyle::NI_All;
727 GoogleStyle.SpacesInContainerLiterals = false;
728 GoogleStyle.JavaScriptQuotes = FormatStyle::JSQS_Single;
729 GoogleStyle.JavaScriptWrapImports = false;
730 } else if (Language == FormatStyle::LK_Proto) {
731 GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None;
732 GoogleStyle.SpacesInContainerLiterals = false;
733 } else if (Language == FormatStyle::LK_ObjC) {
734 GoogleStyle.ColumnLimit = 100;
740 FormatStyle getChromiumStyle(FormatStyle::LanguageKind Language) {
741 FormatStyle ChromiumStyle = getGoogleStyle(Language);
742 if (Language == FormatStyle::LK_Java) {
743 ChromiumStyle.AllowShortIfStatementsOnASingleLine = true;
744 ChromiumStyle.BreakAfterJavaFieldAnnotations = true;
745 ChromiumStyle.ContinuationIndentWidth = 8;
746 ChromiumStyle.IndentWidth = 4;
747 } else if (Language == FormatStyle::LK_JavaScript) {
748 ChromiumStyle.AllowShortIfStatementsOnASingleLine = false;
749 ChromiumStyle.AllowShortLoopsOnASingleLine = false;
751 ChromiumStyle.AllowAllParametersOfDeclarationOnNextLine = false;
752 ChromiumStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
753 ChromiumStyle.AllowShortIfStatementsOnASingleLine = false;
754 ChromiumStyle.AllowShortLoopsOnASingleLine = false;
755 ChromiumStyle.BinPackParameters = false;
756 ChromiumStyle.DerivePointerAlignment = false;
757 if (Language == FormatStyle::LK_ObjC)
758 ChromiumStyle.ColumnLimit = 80;
760 return ChromiumStyle;
763 FormatStyle getMozillaStyle() {
764 FormatStyle MozillaStyle = getLLVMStyle();
765 MozillaStyle.AllowAllParametersOfDeclarationOnNextLine = false;
766 MozillaStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
767 MozillaStyle.AlwaysBreakAfterReturnType = FormatStyle::RTBS_TopLevel;
768 MozillaStyle.AlwaysBreakAfterDefinitionReturnType =
769 FormatStyle::DRTBS_TopLevel;
770 MozillaStyle.AlwaysBreakTemplateDeclarations = true;
771 MozillaStyle.BinPackParameters = false;
772 MozillaStyle.BinPackArguments = false;
773 MozillaStyle.BreakBeforeBraces = FormatStyle::BS_Mozilla;
774 MozillaStyle.BreakConstructorInitializers = FormatStyle::BCIS_BeforeComma;
775 MozillaStyle.BreakBeforeInheritanceComma = true;
776 MozillaStyle.ConstructorInitializerIndentWidth = 2;
777 MozillaStyle.ContinuationIndentWidth = 2;
778 MozillaStyle.Cpp11BracedListStyle = false;
779 MozillaStyle.FixNamespaceComments = false;
780 MozillaStyle.IndentCaseLabels = true;
781 MozillaStyle.ObjCSpaceAfterProperty = true;
782 MozillaStyle.ObjCSpaceBeforeProtocolList = false;
783 MozillaStyle.PenaltyReturnTypeOnItsOwnLine = 200;
784 MozillaStyle.PointerAlignment = FormatStyle::PAS_Left;
785 MozillaStyle.SpaceAfterTemplateKeyword = false;
789 FormatStyle getWebKitStyle() {
790 FormatStyle Style = getLLVMStyle();
791 Style.AccessModifierOffset = -4;
792 Style.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
793 Style.AlignOperands = false;
794 Style.AlignTrailingComments = false;
795 Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
796 Style.BreakBeforeBraces = FormatStyle::BS_WebKit;
797 Style.BreakConstructorInitializers = FormatStyle::BCIS_BeforeComma;
798 Style.Cpp11BracedListStyle = false;
799 Style.ColumnLimit = 0;
800 Style.FixNamespaceComments = false;
801 Style.IndentWidth = 4;
802 Style.NamespaceIndentation = FormatStyle::NI_Inner;
803 Style.ObjCBlockIndentWidth = 4;
804 Style.ObjCSpaceAfterProperty = true;
805 Style.PointerAlignment = FormatStyle::PAS_Left;
809 FormatStyle getGNUStyle() {
810 FormatStyle Style = getLLVMStyle();
811 Style.AlwaysBreakAfterDefinitionReturnType = FormatStyle::DRTBS_All;
812 Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_AllDefinitions;
813 Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
814 Style.BreakBeforeBraces = FormatStyle::BS_GNU;
815 Style.BreakBeforeTernaryOperators = true;
816 Style.Cpp11BracedListStyle = false;
817 Style.ColumnLimit = 79;
818 Style.FixNamespaceComments = false;
819 Style.SpaceBeforeParens = FormatStyle::SBPO_Always;
820 Style.Standard = FormatStyle::LS_Cpp03;
824 FormatStyle getNoStyle() {
825 FormatStyle NoStyle = getLLVMStyle();
826 NoStyle.DisableFormat = true;
827 NoStyle.SortIncludes = false;
828 NoStyle.SortUsingDeclarations = false;
832 bool getPredefinedStyle(StringRef Name, FormatStyle::LanguageKind Language,
833 FormatStyle *Style) {
834 if (Name.equals_lower("llvm")) {
835 *Style = getLLVMStyle();
836 } else if (Name.equals_lower("chromium")) {
837 *Style = getChromiumStyle(Language);
838 } else if (Name.equals_lower("mozilla")) {
839 *Style = getMozillaStyle();
840 } else if (Name.equals_lower("google")) {
841 *Style = getGoogleStyle(Language);
842 } else if (Name.equals_lower("webkit")) {
843 *Style = getWebKitStyle();
844 } else if (Name.equals_lower("gnu")) {
845 *Style = getGNUStyle();
846 } else if (Name.equals_lower("none")) {
847 *Style = getNoStyle();
852 Style->Language = Language;
856 std::error_code parseConfiguration(StringRef Text, FormatStyle *Style) {
858 FormatStyle::LanguageKind Language = Style->Language;
859 assert(Language != FormatStyle::LK_None);
860 if (Text.trim().empty())
861 return make_error_code(ParseError::Error);
863 std::vector<FormatStyle> Styles;
864 llvm::yaml::Input Input(Text);
865 // DocumentListTraits<vector<FormatStyle>> uses the context to get default
866 // values for the fields, keys for which are missing from the configuration.
867 // Mapping also uses the context to get the language to find the correct
869 Input.setContext(Style);
872 return Input.error();
874 for (unsigned i = 0; i < Styles.size(); ++i) {
875 // Ensures that only the first configuration can skip the Language option.
876 if (Styles[i].Language == FormatStyle::LK_None && i != 0)
877 return make_error_code(ParseError::Error);
878 // Ensure that each language is configured at most once.
879 for (unsigned j = 0; j < i; ++j) {
880 if (Styles[i].Language == Styles[j].Language) {
882 << "Duplicate languages in the config file on positions " << j
883 << " and " << i << "\n");
884 return make_error_code(ParseError::Error);
888 // Look for a suitable configuration starting from the end, so we can
889 // find the configuration for the specific language first, and the default
890 // configuration (which can only be at slot 0) after it.
891 for (int i = Styles.size() - 1; i >= 0; --i) {
892 if (Styles[i].Language == Language ||
893 Styles[i].Language == FormatStyle::LK_None) {
895 Style->Language = Language;
896 return make_error_code(ParseError::Success);
899 return make_error_code(ParseError::Unsuitable);
902 std::string configurationAsText(const FormatStyle &Style) {
904 llvm::raw_string_ostream Stream(Text);
905 llvm::yaml::Output Output(Stream);
906 // We use the same mapping method for input and output, so we need a non-const
908 FormatStyle NonConstStyle = expandPresets(Style);
909 Output << NonConstStyle;
915 class JavaScriptRequoter : public TokenAnalyzer {
917 JavaScriptRequoter(const Environment &Env, const FormatStyle &Style)
918 : TokenAnalyzer(Env, Style) {}
920 std::pair<tooling::Replacements, unsigned>
921 analyze(TokenAnnotator &Annotator,
922 SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
923 FormatTokenLexer &Tokens) override {
924 AffectedRangeMgr.computeAffectedLines(AnnotatedLines.begin(),
925 AnnotatedLines.end());
926 tooling::Replacements Result;
927 requoteJSStringLiteral(AnnotatedLines, Result);
932 // Replaces double/single-quoted string literal as appropriate, re-escaping
933 // the contents in the process.
934 void requoteJSStringLiteral(SmallVectorImpl<AnnotatedLine *> &Lines,
935 tooling::Replacements &Result) {
936 for (AnnotatedLine *Line : Lines) {
937 requoteJSStringLiteral(Line->Children, Result);
940 for (FormatToken *FormatTok = Line->First; FormatTok;
941 FormatTok = FormatTok->Next) {
942 StringRef Input = FormatTok->TokenText;
943 if (FormatTok->Finalized || !FormatTok->isStringLiteral() ||
944 // NB: testing for not starting with a double quote to avoid
945 // breaking `template strings`.
946 (Style.JavaScriptQuotes == FormatStyle::JSQS_Single &&
947 !Input.startswith("\"")) ||
948 (Style.JavaScriptQuotes == FormatStyle::JSQS_Double &&
949 !Input.startswith("\'")))
952 // Change start and end quote.
953 bool IsSingle = Style.JavaScriptQuotes == FormatStyle::JSQS_Single;
954 SourceLocation Start = FormatTok->Tok.getLocation();
955 auto Replace = [&](SourceLocation Start, unsigned Length,
956 StringRef ReplacementText) {
957 auto Err = Result.add(tooling::Replacement(
958 Env.getSourceManager(), Start, Length, ReplacementText));
959 // FIXME: handle error. For now, print error message and skip the
960 // replacement for release version.
962 llvm::errs() << llvm::toString(std::move(Err)) << "\n";
966 Replace(Start, 1, IsSingle ? "'" : "\"");
967 Replace(FormatTok->Tok.getEndLoc().getLocWithOffset(-1), 1,
968 IsSingle ? "'" : "\"");
970 // Escape internal quotes.
971 bool Escaped = false;
972 for (size_t i = 1; i < Input.size() - 1; i++) {
975 if (!Escaped && i + 1 < Input.size() &&
976 ((IsSingle && Input[i + 1] == '"') ||
977 (!IsSingle && Input[i + 1] == '\''))) {
978 // Remove this \, it's escaping a " or ' that no longer needs
980 Replace(Start.getLocWithOffset(i), 1, "");
987 if (!Escaped && IsSingle == (Input[i] == '\'')) {
989 Replace(Start.getLocWithOffset(i), 0, "\\");
1003 class Formatter : public TokenAnalyzer {
1005 Formatter(const Environment &Env, const FormatStyle &Style,
1006 FormattingAttemptStatus *Status)
1007 : TokenAnalyzer(Env, Style), Status(Status) {}
1009 std::pair<tooling::Replacements, unsigned>
1010 analyze(TokenAnnotator &Annotator,
1011 SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
1012 FormatTokenLexer &Tokens) override {
1013 tooling::Replacements Result;
1014 deriveLocalStyle(AnnotatedLines);
1015 AffectedRangeMgr.computeAffectedLines(AnnotatedLines.begin(),
1016 AnnotatedLines.end());
1017 for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
1018 Annotator.calculateFormattingInformation(*AnnotatedLines[i]);
1020 Annotator.setCommentLineLevels(AnnotatedLines);
1022 WhitespaceManager Whitespaces(
1023 Env.getSourceManager(), Style,
1024 inputUsesCRLF(Env.getSourceManager().getBufferData(Env.getFileID())));
1025 ContinuationIndenter Indenter(Style, Tokens.getKeywords(),
1026 Env.getSourceManager(), Whitespaces, Encoding,
1027 BinPackInconclusiveFunctions);
1029 UnwrappedLineFormatter(&Indenter, &Whitespaces, Style,
1030 Tokens.getKeywords(), Env.getSourceManager(),
1032 .format(AnnotatedLines, /*DryRun=*/false,
1033 /*AdditionalIndent=*/0,
1034 /*FixBadIndentation=*/false,
1035 /*FirstStartColumn=*/Env.getFirstStartColumn(),
1036 /*NextStartColumn=*/Env.getNextStartColumn(),
1037 /*LastStartColumn=*/Env.getLastStartColumn());
1038 for (const auto &R : Whitespaces.generateReplacements())
1040 return std::make_pair(Result, 0);
1041 return std::make_pair(Result, Penalty);
1045 static bool inputUsesCRLF(StringRef Text) {
1046 return Text.count('\r') * 2 > Text.count('\n');
1050 hasCpp03IncompatibleFormat(const SmallVectorImpl<AnnotatedLine *> &Lines) {
1051 for (const AnnotatedLine *Line : Lines) {
1052 if (hasCpp03IncompatibleFormat(Line->Children))
1054 for (FormatToken *Tok = Line->First->Next; Tok; Tok = Tok->Next) {
1055 if (Tok->WhitespaceRange.getBegin() == Tok->WhitespaceRange.getEnd()) {
1056 if (Tok->is(tok::coloncolon) && Tok->Previous->is(TT_TemplateOpener))
1058 if (Tok->is(TT_TemplateCloser) &&
1059 Tok->Previous->is(TT_TemplateCloser))
1067 int countVariableAlignments(const SmallVectorImpl<AnnotatedLine *> &Lines) {
1068 int AlignmentDiff = 0;
1069 for (const AnnotatedLine *Line : Lines) {
1070 AlignmentDiff += countVariableAlignments(Line->Children);
1071 for (FormatToken *Tok = Line->First; Tok && Tok->Next; Tok = Tok->Next) {
1072 if (!Tok->is(TT_PointerOrReference))
1075 Tok->WhitespaceRange.getBegin() != Tok->WhitespaceRange.getEnd();
1076 bool SpaceAfter = Tok->Next->WhitespaceRange.getBegin() !=
1077 Tok->Next->WhitespaceRange.getEnd();
1078 if (SpaceBefore && !SpaceAfter)
1080 if (!SpaceBefore && SpaceAfter)
1084 return AlignmentDiff;
1088 deriveLocalStyle(const SmallVectorImpl<AnnotatedLine *> &AnnotatedLines) {
1089 bool HasBinPackedFunction = false;
1090 bool HasOnePerLineFunction = false;
1091 for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
1092 if (!AnnotatedLines[i]->First->Next)
1094 FormatToken *Tok = AnnotatedLines[i]->First->Next;
1096 if (Tok->PackingKind == PPK_BinPacked)
1097 HasBinPackedFunction = true;
1098 if (Tok->PackingKind == PPK_OnePerLine)
1099 HasOnePerLineFunction = true;
1104 if (Style.DerivePointerAlignment)
1105 Style.PointerAlignment = countVariableAlignments(AnnotatedLines) <= 0
1106 ? FormatStyle::PAS_Left
1107 : FormatStyle::PAS_Right;
1108 if (Style.Standard == FormatStyle::LS_Auto)
1109 Style.Standard = hasCpp03IncompatibleFormat(AnnotatedLines)
1110 ? FormatStyle::LS_Cpp11
1111 : FormatStyle::LS_Cpp03;
1112 BinPackInconclusiveFunctions =
1113 HasBinPackedFunction || !HasOnePerLineFunction;
1116 bool BinPackInconclusiveFunctions;
1117 FormattingAttemptStatus *Status;
1120 // This class clean up the erroneous/redundant code around the given ranges in
1122 class Cleaner : public TokenAnalyzer {
1124 Cleaner(const Environment &Env, const FormatStyle &Style)
1125 : TokenAnalyzer(Env, Style),
1126 DeletedTokens(FormatTokenLess(Env.getSourceManager())) {}
1128 // FIXME: eliminate unused parameters.
1129 std::pair<tooling::Replacements, unsigned>
1130 analyze(TokenAnnotator &Annotator,
1131 SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
1132 FormatTokenLexer &Tokens) override {
1133 // FIXME: in the current implementation the granularity of affected range
1134 // is an annotated line. However, this is not sufficient. Furthermore,
1135 // redundant code introduced by replacements does not necessarily
1136 // intercept with ranges of replacements that result in the redundancy.
1137 // To determine if some redundant code is actually introduced by
1138 // replacements(e.g. deletions), we need to come up with a more
1139 // sophisticated way of computing affected ranges.
1140 AffectedRangeMgr.computeAffectedLines(AnnotatedLines.begin(),
1141 AnnotatedLines.end());
1143 checkEmptyNamespace(AnnotatedLines);
1145 for (auto &Line : AnnotatedLines) {
1146 if (Line->Affected) {
1147 cleanupRight(Line->First, tok::comma, tok::comma);
1148 cleanupRight(Line->First, TT_CtorInitializerColon, tok::comma);
1149 cleanupRight(Line->First, tok::l_paren, tok::comma);
1150 cleanupLeft(Line->First, tok::comma, tok::r_paren);
1151 cleanupLeft(Line->First, TT_CtorInitializerComma, tok::l_brace);
1152 cleanupLeft(Line->First, TT_CtorInitializerColon, tok::l_brace);
1153 cleanupLeft(Line->First, TT_CtorInitializerColon, tok::equal);
1157 return {generateFixes(), 0};
1161 bool containsOnlyComments(const AnnotatedLine &Line) {
1162 for (FormatToken *Tok = Line.First; Tok != nullptr; Tok = Tok->Next) {
1163 if (Tok->isNot(tok::comment))
1169 // Iterate through all lines and remove any empty (nested) namespaces.
1170 void checkEmptyNamespace(SmallVectorImpl<AnnotatedLine *> &AnnotatedLines) {
1171 std::set<unsigned> DeletedLines;
1172 for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
1173 auto &Line = *AnnotatedLines[i];
1174 if (Line.startsWith(tok::kw_namespace) ||
1175 Line.startsWith(tok::kw_inline, tok::kw_namespace)) {
1176 checkEmptyNamespace(AnnotatedLines, i, i, DeletedLines);
1180 for (auto Line : DeletedLines) {
1181 FormatToken *Tok = AnnotatedLines[Line]->First;
1189 // The function checks if the namespace, which starts from \p CurrentLine, and
1190 // its nested namespaces are empty and delete them if they are empty. It also
1191 // sets \p NewLine to the last line checked.
1192 // Returns true if the current namespace is empty.
1193 bool checkEmptyNamespace(SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
1194 unsigned CurrentLine, unsigned &NewLine,
1195 std::set<unsigned> &DeletedLines) {
1196 unsigned InitLine = CurrentLine, End = AnnotatedLines.size();
1197 if (Style.BraceWrapping.AfterNamespace) {
1198 // If the left brace is in a new line, we should consume it first so that
1199 // it does not make the namespace non-empty.
1200 // FIXME: error handling if there is no left brace.
1201 if (!AnnotatedLines[++CurrentLine]->startsWith(tok::l_brace)) {
1202 NewLine = CurrentLine;
1205 } else if (!AnnotatedLines[CurrentLine]->endsWith(tok::l_brace)) {
1208 while (++CurrentLine < End) {
1209 if (AnnotatedLines[CurrentLine]->startsWith(tok::r_brace))
1212 if (AnnotatedLines[CurrentLine]->startsWith(tok::kw_namespace) ||
1213 AnnotatedLines[CurrentLine]->startsWith(tok::kw_inline,
1214 tok::kw_namespace)) {
1215 if (!checkEmptyNamespace(AnnotatedLines, CurrentLine, NewLine,
1218 CurrentLine = NewLine;
1222 if (containsOnlyComments(*AnnotatedLines[CurrentLine]))
1225 // If there is anything other than comments or nested namespaces in the
1226 // current namespace, the namespace cannot be empty.
1227 NewLine = CurrentLine;
1231 NewLine = CurrentLine;
1232 if (CurrentLine >= End)
1235 // Check if the empty namespace is actually affected by changed ranges.
1236 if (!AffectedRangeMgr.affectsCharSourceRange(CharSourceRange::getCharRange(
1237 AnnotatedLines[InitLine]->First->Tok.getLocation(),
1238 AnnotatedLines[CurrentLine]->Last->Tok.getEndLoc())))
1241 for (unsigned i = InitLine; i <= CurrentLine; ++i) {
1242 DeletedLines.insert(i);
1248 // Checks pairs {start, start->next},..., {end->previous, end} and deletes one
1249 // of the token in the pair if the left token has \p LK token kind and the
1250 // right token has \p RK token kind. If \p DeleteLeft is true, the left token
1251 // is deleted on match; otherwise, the right token is deleted.
1252 template <typename LeftKind, typename RightKind>
1253 void cleanupPair(FormatToken *Start, LeftKind LK, RightKind RK,
1255 auto NextNotDeleted = [this](const FormatToken &Tok) -> FormatToken * {
1256 for (auto *Res = Tok.Next; Res; Res = Res->Next)
1257 if (!Res->is(tok::comment) &&
1258 DeletedTokens.find(Res) == DeletedTokens.end())
1262 for (auto *Left = Start; Left;) {
1263 auto *Right = NextNotDeleted(*Left);
1266 if (Left->is(LK) && Right->is(RK)) {
1267 deleteToken(DeleteLeft ? Left : Right);
1268 for (auto *Tok = Left->Next; Tok && Tok != Right; Tok = Tok->Next)
1270 // If the right token is deleted, we should keep the left token
1271 // unchanged and pair it with the new right token.
1279 template <typename LeftKind, typename RightKind>
1280 void cleanupLeft(FormatToken *Start, LeftKind LK, RightKind RK) {
1281 cleanupPair(Start, LK, RK, /*DeleteLeft=*/true);
1284 template <typename LeftKind, typename RightKind>
1285 void cleanupRight(FormatToken *Start, LeftKind LK, RightKind RK) {
1286 cleanupPair(Start, LK, RK, /*DeleteLeft=*/false);
1289 // Delete the given token.
1290 inline void deleteToken(FormatToken *Tok) {
1292 DeletedTokens.insert(Tok);
1295 tooling::Replacements generateFixes() {
1296 tooling::Replacements Fixes;
1297 std::vector<FormatToken *> Tokens;
1298 std::copy(DeletedTokens.begin(), DeletedTokens.end(),
1299 std::back_inserter(Tokens));
1301 // Merge multiple continuous token deletions into one big deletion so that
1302 // the number of replacements can be reduced. This makes computing affected
1303 // ranges more efficient when we run reformat on the changed code.
1305 while (Idx < Tokens.size()) {
1306 unsigned St = Idx, End = Idx;
1307 while ((End + 1) < Tokens.size() &&
1308 Tokens[End]->Next == Tokens[End + 1]) {
1311 auto SR = CharSourceRange::getCharRange(Tokens[St]->Tok.getLocation(),
1312 Tokens[End]->Tok.getEndLoc());
1314 Fixes.add(tooling::Replacement(Env.getSourceManager(), SR, ""));
1315 // FIXME: better error handling. for now just print error message and skip
1316 // for the release version.
1318 llvm::errs() << llvm::toString(std::move(Err)) << "\n";
1319 assert(false && "Fixes must not conflict!");
1327 // Class for less-than inequality comparason for the set `RedundantTokens`.
1328 // We store tokens in the order they appear in the translation unit so that
1329 // we do not need to sort them in `generateFixes()`.
1330 struct FormatTokenLess {
1331 FormatTokenLess(const SourceManager &SM) : SM(SM) {}
1333 bool operator()(const FormatToken *LHS, const FormatToken *RHS) const {
1334 return SM.isBeforeInTranslationUnit(LHS->Tok.getLocation(),
1335 RHS->Tok.getLocation());
1337 const SourceManager &SM;
1340 // Tokens to be deleted.
1341 std::set<FormatToken *, FormatTokenLess> DeletedTokens;
1344 struct IncludeDirective {
1351 } // end anonymous namespace
1353 // Determines whether 'Ranges' intersects with ('Start', 'End').
1354 static bool affectsRange(ArrayRef<tooling::Range> Ranges, unsigned Start,
1356 for (auto Range : Ranges) {
1357 if (Range.getOffset() < End &&
1358 Range.getOffset() + Range.getLength() > Start)
1364 // Returns a pair (Index, OffsetToEOL) describing the position of the cursor
1365 // before sorting/deduplicating. Index is the index of the include under the
1366 // cursor in the original set of includes. If this include has duplicates, it is
1367 // the index of the first of the duplicates as the others are going to be
1368 // removed. OffsetToEOL describes the cursor's position relative to the end of
1369 // its current line.
1370 // If `Cursor` is not on any #include, `Index` will be UINT_MAX.
1371 static std::pair<unsigned, unsigned>
1372 FindCursorIndex(const SmallVectorImpl<IncludeDirective> &Includes,
1373 const SmallVectorImpl<unsigned> &Indices, unsigned Cursor) {
1374 unsigned CursorIndex = UINT_MAX;
1375 unsigned OffsetToEOL = 0;
1376 for (int i = 0, e = Includes.size(); i != e; ++i) {
1377 unsigned Start = Includes[Indices[i]].Offset;
1378 unsigned End = Start + Includes[Indices[i]].Text.size();
1379 if (!(Cursor >= Start && Cursor < End))
1381 CursorIndex = Indices[i];
1382 OffsetToEOL = End - Cursor;
1383 // Put the cursor on the only remaining #include among the duplicate
1385 while (--i >= 0 && Includes[CursorIndex].Text == Includes[Indices[i]].Text)
1389 return std::make_pair(CursorIndex, OffsetToEOL);
1392 // Sorts and deduplicate a block of includes given by 'Includes' alphabetically
1393 // adding the necessary replacement to 'Replaces'. 'Includes' must be in strict
1395 // #include directives with the same text will be deduplicated, and only the
1396 // first #include in the duplicate #includes remains. If the `Cursor` is
1397 // provided and put on a deleted #include, it will be moved to the remaining
1398 // #include in the duplicate #includes.
1399 static void sortCppIncludes(const FormatStyle &Style,
1400 const SmallVectorImpl<IncludeDirective> &Includes,
1401 ArrayRef<tooling::Range> Ranges, StringRef FileName,
1402 tooling::Replacements &Replaces, unsigned *Cursor) {
1403 unsigned IncludesBeginOffset = Includes.front().Offset;
1404 unsigned IncludesEndOffset =
1405 Includes.back().Offset + Includes.back().Text.size();
1406 unsigned IncludesBlockSize = IncludesEndOffset - IncludesBeginOffset;
1407 if (!affectsRange(Ranges, IncludesBeginOffset, IncludesEndOffset))
1409 SmallVector<unsigned, 16> Indices;
1410 for (unsigned i = 0, e = Includes.size(); i != e; ++i)
1411 Indices.push_back(i);
1413 Indices.begin(), Indices.end(), [&](unsigned LHSI, unsigned RHSI) {
1414 return std::tie(Includes[LHSI].Category, Includes[LHSI].Filename) <
1415 std::tie(Includes[RHSI].Category, Includes[RHSI].Filename);
1417 // The index of the include on which the cursor will be put after
1418 // sorting/deduplicating.
1419 unsigned CursorIndex;
1420 // The offset from cursor to the end of line.
1421 unsigned CursorToEOLOffset;
1423 std::tie(CursorIndex, CursorToEOLOffset) =
1424 FindCursorIndex(Includes, Indices, *Cursor);
1426 // Deduplicate #includes.
1427 Indices.erase(std::unique(Indices.begin(), Indices.end(),
1428 [&](unsigned LHSI, unsigned RHSI) {
1429 return Includes[LHSI].Text == Includes[RHSI].Text;
1433 int CurrentCategory = Includes.front().Category;
1435 // If the #includes are out of order, we generate a single replacement fixing
1436 // the entire block. Otherwise, no replacement is generated.
1437 if (Indices.size() == Includes.size() &&
1438 std::is_sorted(Indices.begin(), Indices.end()) &&
1439 Style.IncludeBlocks == FormatStyle::IBS_Preserve)
1443 for (unsigned Index : Indices) {
1444 if (!result.empty()) {
1446 if (Style.IncludeBlocks == FormatStyle::IBS_Regroup &&
1447 CurrentCategory != Includes[Index].Category)
1450 result += Includes[Index].Text;
1451 if (Cursor && CursorIndex == Index)
1452 *Cursor = IncludesBeginOffset + result.size() - CursorToEOLOffset;
1453 CurrentCategory = Includes[Index].Category;
1456 auto Err = Replaces.add(tooling::Replacement(
1457 FileName, Includes.front().Offset, IncludesBlockSize, result));
1458 // FIXME: better error handling. For now, just skip the replacement for the
1461 llvm::errs() << llvm::toString(std::move(Err)) << "\n";
1468 // This class manages priorities of #include categories and calculates
1469 // priorities for headers.
1470 class IncludeCategoryManager {
1472 IncludeCategoryManager(const FormatStyle &Style, StringRef FileName)
1473 : Style(Style), FileName(FileName) {
1474 FileStem = llvm::sys::path::stem(FileName);
1475 for (const auto &Category : Style.IncludeCategories)
1476 CategoryRegexs.emplace_back(Category.Regex, llvm::Regex::IgnoreCase);
1477 IsMainFile = FileName.endswith(".c") || FileName.endswith(".cc") ||
1478 FileName.endswith(".cpp") || FileName.endswith(".c++") ||
1479 FileName.endswith(".cxx") || FileName.endswith(".m") ||
1480 FileName.endswith(".mm");
1483 // Returns the priority of the category which \p IncludeName belongs to.
1484 // If \p CheckMainHeader is true and \p IncludeName is a main header, returns
1485 // 0. Otherwise, returns the priority of the matching category or INT_MAX.
1486 int getIncludePriority(StringRef IncludeName, bool CheckMainHeader) {
1488 for (unsigned i = 0, e = CategoryRegexs.size(); i != e; ++i)
1489 if (CategoryRegexs[i].match(IncludeName)) {
1490 Ret = Style.IncludeCategories[i].Priority;
1493 if (CheckMainHeader && IsMainFile && Ret > 0 && isMainHeader(IncludeName))
1499 bool isMainHeader(StringRef IncludeName) const {
1500 if (!IncludeName.startswith("\""))
1502 StringRef HeaderStem =
1503 llvm::sys::path::stem(IncludeName.drop_front(1).drop_back(1));
1504 if (FileStem.startswith(HeaderStem) ||
1505 FileStem.startswith_lower(HeaderStem)) {
1506 llvm::Regex MainIncludeRegex(
1507 (HeaderStem + Style.IncludeIsMainRegex).str(),
1508 llvm::Regex::IgnoreCase);
1509 if (MainIncludeRegex.match(FileStem))
1515 const FormatStyle &Style;
1519 SmallVector<llvm::Regex, 4> CategoryRegexs;
1522 const char IncludeRegexPattern[] =
1523 R"(^[\t\ ]*#[\t\ ]*(import|include)[^"<]*(["<][^">]*[">]))";
1525 } // anonymous namespace
1527 tooling::Replacements sortCppIncludes(const FormatStyle &Style, StringRef Code,
1528 ArrayRef<tooling::Range> Ranges,
1530 tooling::Replacements &Replaces,
1533 unsigned SearchFrom = 0;
1534 llvm::Regex IncludeRegex(IncludeRegexPattern);
1535 SmallVector<StringRef, 4> Matches;
1536 SmallVector<IncludeDirective, 16> IncludesInBlock;
1538 // In compiled files, consider the first #include to be the main #include of
1539 // the file if it is not a system #include. This ensures that the header
1540 // doesn't have hidden dependencies
1541 // (http://llvm.org/docs/CodingStandards.html#include-style).
1543 // FIXME: Do some sanity checking, e.g. edit distance of the base name, to fix
1544 // cases where the first #include is unlikely to be the main header.
1545 IncludeCategoryManager Categories(Style, FileName);
1546 bool FirstIncludeBlock = true;
1547 bool MainIncludeFound = false;
1548 bool FormattingOff = false;
1551 auto Pos = Code.find('\n', SearchFrom);
1553 Code.substr(Prev, (Pos != StringRef::npos ? Pos : Code.size()) - Prev);
1555 StringRef Trimmed = Line.trim();
1556 if (Trimmed == "// clang-format off")
1557 FormattingOff = true;
1558 else if (Trimmed == "// clang-format on")
1559 FormattingOff = false;
1561 const bool EmptyLineSkipped =
1562 Trimmed.empty() && (Style.IncludeBlocks == FormatStyle::IBS_Merge ||
1563 Style.IncludeBlocks == FormatStyle::IBS_Regroup);
1565 if (!FormattingOff && !Line.endswith("\\")) {
1566 if (IncludeRegex.match(Line, &Matches)) {
1567 StringRef IncludeName = Matches[2];
1568 int Category = Categories.getIncludePriority(
1570 /*CheckMainHeader=*/!MainIncludeFound && FirstIncludeBlock);
1572 MainIncludeFound = true;
1573 IncludesInBlock.push_back({IncludeName, Line, Prev, Category});
1574 } else if (!IncludesInBlock.empty() && !EmptyLineSkipped) {
1575 sortCppIncludes(Style, IncludesInBlock, Ranges, FileName, Replaces,
1577 IncludesInBlock.clear();
1578 FirstIncludeBlock = false;
1582 if (Pos == StringRef::npos || Pos + 1 == Code.size())
1584 SearchFrom = Pos + 1;
1586 if (!IncludesInBlock.empty())
1587 sortCppIncludes(Style, IncludesInBlock, Ranges, FileName, Replaces, Cursor);
1591 bool isMpegTS(StringRef Code) {
1592 // MPEG transport streams use the ".ts" file extension. clang-format should
1593 // not attempt to format those. MPEG TS' frame format starts with 0x47 every
1594 // 189 bytes - detect that and return.
1595 return Code.size() > 188 && Code[0] == 0x47 && Code[188] == 0x47;
1598 bool isLikelyXml(StringRef Code) { return Code.ltrim().startswith("<"); }
1600 tooling::Replacements sortIncludes(const FormatStyle &Style, StringRef Code,
1601 ArrayRef<tooling::Range> Ranges,
1602 StringRef FileName, unsigned *Cursor) {
1603 tooling::Replacements Replaces;
1604 if (!Style.SortIncludes)
1606 if (isLikelyXml(Code))
1608 if (Style.Language == FormatStyle::LanguageKind::LK_JavaScript &&
1611 if (Style.Language == FormatStyle::LanguageKind::LK_JavaScript)
1612 return sortJavaScriptImports(Style, Code, Ranges, FileName);
1613 sortCppIncludes(Style, Code, Ranges, FileName, Replaces, Cursor);
1617 template <typename T>
1618 static llvm::Expected<tooling::Replacements>
1619 processReplacements(T ProcessFunc, StringRef Code,
1620 const tooling::Replacements &Replaces,
1621 const FormatStyle &Style) {
1622 if (Replaces.empty())
1623 return tooling::Replacements();
1625 auto NewCode = applyAllReplacements(Code, Replaces);
1627 return NewCode.takeError();
1628 std::vector<tooling::Range> ChangedRanges = Replaces.getAffectedRanges();
1629 StringRef FileName = Replaces.begin()->getFilePath();
1631 tooling::Replacements FormatReplaces =
1632 ProcessFunc(Style, *NewCode, ChangedRanges, FileName);
1634 return Replaces.merge(FormatReplaces);
1637 llvm::Expected<tooling::Replacements>
1638 formatReplacements(StringRef Code, const tooling::Replacements &Replaces,
1639 const FormatStyle &Style) {
1640 // We need to use lambda function here since there are two versions of
1642 auto SortIncludes = [](const FormatStyle &Style, StringRef Code,
1643 std::vector<tooling::Range> Ranges,
1644 StringRef FileName) -> tooling::Replacements {
1645 return sortIncludes(Style, Code, Ranges, FileName);
1647 auto SortedReplaces =
1648 processReplacements(SortIncludes, Code, Replaces, Style);
1649 if (!SortedReplaces)
1650 return SortedReplaces.takeError();
1652 // We need to use lambda function here since there are two versions of
1654 auto Reformat = [](const FormatStyle &Style, StringRef Code,
1655 std::vector<tooling::Range> Ranges,
1656 StringRef FileName) -> tooling::Replacements {
1657 return reformat(Style, Code, Ranges, FileName);
1659 return processReplacements(Reformat, Code, *SortedReplaces, Style);
1664 inline bool isHeaderInsertion(const tooling::Replacement &Replace) {
1665 return Replace.getOffset() == UINT_MAX && Replace.getLength() == 0 &&
1666 llvm::Regex(IncludeRegexPattern).match(Replace.getReplacementText());
1669 inline bool isHeaderDeletion(const tooling::Replacement &Replace) {
1670 return Replace.getOffset() == UINT_MAX && Replace.getLength() == 1;
1673 // Returns the offset after skipping a sequence of tokens, matched by \p
1674 // GetOffsetAfterSequence, from the start of the code.
1675 // \p GetOffsetAfterSequence should be a function that matches a sequence of
1676 // tokens and returns an offset after the sequence.
1677 unsigned getOffsetAfterTokenSequence(
1678 StringRef FileName, StringRef Code, const FormatStyle &Style,
1679 llvm::function_ref<unsigned(const SourceManager &, Lexer &, Token &)>
1680 GetOffsetAfterSequence) {
1681 std::unique_ptr<Environment> Env =
1682 Environment::CreateVirtualEnvironment(Code, FileName, /*Ranges=*/{});
1683 const SourceManager &SourceMgr = Env->getSourceManager();
1684 Lexer Lex(Env->getFileID(), SourceMgr.getBuffer(Env->getFileID()), SourceMgr,
1685 getFormattingLangOpts(Style));
1687 // Get the first token.
1688 Lex.LexFromRawLexer(Tok);
1689 return GetOffsetAfterSequence(SourceMgr, Lex, Tok);
1692 // Check if a sequence of tokens is like "#<Name> <raw_identifier>". If it is,
1693 // \p Tok will be the token after this directive; otherwise, it can be any token
1694 // after the given \p Tok (including \p Tok).
1695 bool checkAndConsumeDirectiveWithName(Lexer &Lex, StringRef Name, Token &Tok) {
1696 bool Matched = Tok.is(tok::hash) && !Lex.LexFromRawLexer(Tok) &&
1697 Tok.is(tok::raw_identifier) &&
1698 Tok.getRawIdentifier() == Name && !Lex.LexFromRawLexer(Tok) &&
1699 Tok.is(tok::raw_identifier);
1701 Lex.LexFromRawLexer(Tok);
1705 void skipComments(Lexer &Lex, Token &Tok) {
1706 while (Tok.is(tok::comment))
1707 if (Lex.LexFromRawLexer(Tok))
1711 // Returns the offset after header guard directives and any comments
1712 // before/after header guards. If no header guard presents in the code, this
1713 // will returns the offset after skipping all comments from the start of the
1715 unsigned getOffsetAfterHeaderGuardsAndComments(StringRef FileName,
1717 const FormatStyle &Style) {
1718 return getOffsetAfterTokenSequence(
1719 FileName, Code, Style,
1720 [](const SourceManager &SM, Lexer &Lex, Token Tok) {
1721 skipComments(Lex, Tok);
1722 unsigned InitialOffset = SM.getFileOffset(Tok.getLocation());
1723 if (checkAndConsumeDirectiveWithName(Lex, "ifndef", Tok)) {
1724 skipComments(Lex, Tok);
1725 if (checkAndConsumeDirectiveWithName(Lex, "define", Tok))
1726 return SM.getFileOffset(Tok.getLocation());
1728 return InitialOffset;
1732 // Check if a sequence of tokens is like
1733 // "#include ("header.h" | <header.h>)".
1734 // If it is, \p Tok will be the token after this directive; otherwise, it can be
1735 // any token after the given \p Tok (including \p Tok).
1736 bool checkAndConsumeInclusiveDirective(Lexer &Lex, Token &Tok) {
1737 auto Matched = [&]() {
1738 Lex.LexFromRawLexer(Tok);
1741 if (Tok.is(tok::hash) && !Lex.LexFromRawLexer(Tok) &&
1742 Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == "include") {
1743 if (Lex.LexFromRawLexer(Tok))
1745 if (Tok.is(tok::string_literal))
1747 if (Tok.is(tok::less)) {
1748 while (!Lex.LexFromRawLexer(Tok) && Tok.isNot(tok::greater)) {
1750 if (Tok.is(tok::greater))
1757 // Returns the offset of the last #include directive after which a new
1758 // #include can be inserted. This ignores #include's after the #include block(s)
1759 // in the beginning of a file to avoid inserting headers into code sections
1760 // where new #include's should not be added by default.
1761 // These code sections include:
1762 // - raw string literals (containing #include).
1764 // - Special #include's among declarations (e.g. functions).
1766 // If no #include after which a new #include can be inserted, this returns the
1767 // offset after skipping all comments from the start of the code.
1768 // Inserting after an #include is not allowed if it comes after code that is not
1769 // #include (e.g. pre-processing directive that is not #include, declarations).
1770 unsigned getMaxHeaderInsertionOffset(StringRef FileName, StringRef Code,
1771 const FormatStyle &Style) {
1772 return getOffsetAfterTokenSequence(
1773 FileName, Code, Style,
1774 [](const SourceManager &SM, Lexer &Lex, Token Tok) {
1775 skipComments(Lex, Tok);
1776 unsigned MaxOffset = SM.getFileOffset(Tok.getLocation());
1777 while (checkAndConsumeInclusiveDirective(Lex, Tok))
1778 MaxOffset = SM.getFileOffset(Tok.getLocation());
1783 bool isDeletedHeader(llvm::StringRef HeaderName,
1784 const std::set<llvm::StringRef> &HeadersToDelete) {
1785 return HeadersToDelete.count(HeaderName) ||
1786 HeadersToDelete.count(HeaderName.trim("\"<>"));
1789 // FIXME: insert empty lines between newly created blocks.
1790 tooling::Replacements
1791 fixCppIncludeInsertions(StringRef Code, const tooling::Replacements &Replaces,
1792 const FormatStyle &Style) {
1796 tooling::Replacements HeaderInsertions;
1797 std::set<llvm::StringRef> HeadersToDelete;
1798 tooling::Replacements Result;
1799 for (const auto &R : Replaces) {
1800 if (isHeaderInsertion(R)) {
1801 // Replacements from \p Replaces must be conflict-free already, so we can
1802 // simply consume the error.
1803 llvm::consumeError(HeaderInsertions.add(R));
1804 } else if (isHeaderDeletion(R)) {
1805 HeadersToDelete.insert(R.getReplacementText());
1806 } else if (R.getOffset() == UINT_MAX) {
1807 llvm::errs() << "Insertions other than header #include insertion are "
1809 << R.getReplacementText() << "\n";
1811 llvm::consumeError(Result.add(R));
1814 if (HeaderInsertions.empty() && HeadersToDelete.empty())
1817 llvm::Regex IncludeRegex(IncludeRegexPattern);
1818 llvm::Regex DefineRegex(R"(^[\t\ ]*#[\t\ ]*define[\t\ ]*[^\\]*$)");
1819 SmallVector<StringRef, 4> Matches;
1821 StringRef FileName = Replaces.begin()->getFilePath();
1822 IncludeCategoryManager Categories(Style, FileName);
1824 // Record the offset of the end of the last include in each category.
1825 std::map<int, int> CategoryEndOffsets;
1826 // All possible priorities.
1827 // Add 0 for main header and INT_MAX for headers that are not in any category.
1828 std::set<int> Priorities = {0, INT_MAX};
1829 for (const auto &Category : Style.IncludeCategories)
1830 Priorities.insert(Category.Priority);
1831 int FirstIncludeOffset = -1;
1832 // All new headers should be inserted after this offset.
1833 unsigned MinInsertOffset =
1834 getOffsetAfterHeaderGuardsAndComments(FileName, Code, Style);
1835 StringRef TrimmedCode = Code.drop_front(MinInsertOffset);
1836 // Max insertion offset in the original code.
1837 unsigned MaxInsertOffset =
1839 getMaxHeaderInsertionOffset(FileName, TrimmedCode, Style);
1840 SmallVector<StringRef, 32> Lines;
1841 TrimmedCode.split(Lines, '\n');
1842 unsigned Offset = MinInsertOffset;
1843 unsigned NextLineOffset;
1844 std::set<StringRef> ExistingIncludes;
1845 for (auto Line : Lines) {
1846 NextLineOffset = std::min(Code.size(), Offset + Line.size() + 1);
1847 if (IncludeRegex.match(Line, &Matches)) {
1848 // The header name with quotes or angle brackets.
1849 StringRef IncludeName = Matches[2];
1850 ExistingIncludes.insert(IncludeName);
1851 // Only record the offset of current #include if we can insert after it.
1852 if (Offset <= MaxInsertOffset) {
1853 int Category = Categories.getIncludePriority(
1854 IncludeName, /*CheckMainHeader=*/FirstIncludeOffset < 0);
1855 CategoryEndOffsets[Category] = NextLineOffset;
1856 if (FirstIncludeOffset < 0)
1857 FirstIncludeOffset = Offset;
1859 if (isDeletedHeader(IncludeName, HeadersToDelete)) {
1860 // If this is the last line without trailing newline, we need to make
1861 // sure we don't delete across the file boundary.
1862 unsigned Length = std::min(Line.size() + 1, Code.size() - Offset);
1864 Result.add(tooling::Replacement(FileName, Offset, Length, ""));
1866 // Ignore the deletion on conflict.
1867 llvm::errs() << "Failed to add header deletion replacement for "
1868 << IncludeName << ": " << llvm::toString(std::move(Err))
1873 Offset = NextLineOffset;
1876 // Populate CategoryEndOfssets:
1877 // - Ensure that CategoryEndOffset[Highest] is always populated.
1878 // - If CategoryEndOffset[Priority] isn't set, use the next higher value that
1879 // is set, up to CategoryEndOffset[Highest].
1880 auto Highest = Priorities.begin();
1881 if (CategoryEndOffsets.find(*Highest) == CategoryEndOffsets.end()) {
1882 if (FirstIncludeOffset >= 0)
1883 CategoryEndOffsets[*Highest] = FirstIncludeOffset;
1885 CategoryEndOffsets[*Highest] = MinInsertOffset;
1887 // By this point, CategoryEndOffset[Highest] is always set appropriately:
1888 // - to an appropriate location before/after existing #includes, or
1889 // - to right after the header guard, or
1890 // - to the beginning of the file.
1891 for (auto I = ++Priorities.begin(), E = Priorities.end(); I != E; ++I)
1892 if (CategoryEndOffsets.find(*I) == CategoryEndOffsets.end())
1893 CategoryEndOffsets[*I] = CategoryEndOffsets[*std::prev(I)];
1895 bool NeedNewLineAtEnd = !Code.empty() && Code.back() != '\n';
1896 for (const auto &R : HeaderInsertions) {
1897 auto IncludeDirective = R.getReplacementText();
1898 bool Matched = IncludeRegex.match(IncludeDirective, &Matches);
1899 assert(Matched && "Header insertion replacement must have replacement text "
1902 auto IncludeName = Matches[2];
1903 if (ExistingIncludes.find(IncludeName) != ExistingIncludes.end()) {
1904 DEBUG(llvm::dbgs() << "Skip adding existing include : " << IncludeName
1909 Categories.getIncludePriority(IncludeName, /*CheckMainHeader=*/true);
1910 Offset = CategoryEndOffsets[Category];
1911 std::string NewInclude = !IncludeDirective.endswith("\n")
1912 ? (IncludeDirective + "\n").str()
1913 : IncludeDirective.str();
1914 // When inserting headers at end of the code, also append '\n' to the code
1915 // if it does not end with '\n'.
1916 if (NeedNewLineAtEnd && Offset == Code.size()) {
1917 NewInclude = "\n" + NewInclude;
1918 NeedNewLineAtEnd = false;
1920 auto NewReplace = tooling::Replacement(FileName, Offset, 0, NewInclude);
1921 auto Err = Result.add(NewReplace);
1923 llvm::consumeError(std::move(Err));
1924 unsigned NewOffset = Result.getShiftedCodePosition(Offset);
1925 NewReplace = tooling::Replacement(FileName, NewOffset, 0, NewInclude);
1926 Result = Result.merge(tooling::Replacements(NewReplace));
1932 } // anonymous namespace
1934 llvm::Expected<tooling::Replacements>
1935 cleanupAroundReplacements(StringRef Code, const tooling::Replacements &Replaces,
1936 const FormatStyle &Style) {
1937 // We need to use lambda function here since there are two versions of
1939 auto Cleanup = [](const FormatStyle &Style, StringRef Code,
1940 std::vector<tooling::Range> Ranges,
1941 StringRef FileName) -> tooling::Replacements {
1942 return cleanup(Style, Code, Ranges, FileName);
1944 // Make header insertion replacements insert new headers into correct blocks.
1945 tooling::Replacements NewReplaces =
1946 fixCppIncludeInsertions(Code, Replaces, Style);
1947 return processReplacements(Cleanup, Code, NewReplaces, Style);
1950 namespace internal {
1951 std::pair<tooling::Replacements, unsigned>
1952 reformat(const FormatStyle &Style, StringRef Code,
1953 ArrayRef<tooling::Range> Ranges, unsigned FirstStartColumn,
1954 unsigned NextStartColumn, unsigned LastStartColumn, StringRef FileName,
1955 FormattingAttemptStatus *Status) {
1956 FormatStyle Expanded = expandPresets(Style);
1957 if (Expanded.DisableFormat)
1958 return {tooling::Replacements(), 0};
1959 if (isLikelyXml(Code))
1960 return {tooling::Replacements(), 0};
1961 if (Expanded.Language == FormatStyle::LK_JavaScript && isMpegTS(Code))
1962 return {tooling::Replacements(), 0};
1964 typedef std::function<std::pair<tooling::Replacements, unsigned>(
1965 const Environment &)>
1967 SmallVector<AnalyzerPass, 4> Passes;
1969 if (Style.Language == FormatStyle::LK_Cpp) {
1970 if (Style.FixNamespaceComments)
1971 Passes.emplace_back([&](const Environment &Env) {
1972 return NamespaceEndCommentsFixer(Env, Expanded).process();
1975 if (Style.SortUsingDeclarations)
1976 Passes.emplace_back([&](const Environment &Env) {
1977 return UsingDeclarationsSorter(Env, Expanded).process();
1981 if (Style.Language == FormatStyle::LK_JavaScript &&
1982 Style.JavaScriptQuotes != FormatStyle::JSQS_Leave)
1983 Passes.emplace_back([&](const Environment &Env) {
1984 return JavaScriptRequoter(Env, Expanded).process();
1987 Passes.emplace_back([&](const Environment &Env) {
1988 return Formatter(Env, Expanded, Status).process();
1991 std::unique_ptr<Environment> Env = Environment::CreateVirtualEnvironment(
1992 Code, FileName, Ranges, FirstStartColumn, NextStartColumn,
1994 llvm::Optional<std::string> CurrentCode = None;
1995 tooling::Replacements Fixes;
1996 unsigned Penalty = 0;
1997 for (size_t I = 0, E = Passes.size(); I < E; ++I) {
1998 std::pair<tooling::Replacements, unsigned> PassFixes = Passes[I](*Env);
1999 auto NewCode = applyAllReplacements(
2000 CurrentCode ? StringRef(*CurrentCode) : Code, PassFixes.first);
2002 Fixes = Fixes.merge(PassFixes.first);
2003 Penalty += PassFixes.second;
2005 CurrentCode = std::move(*NewCode);
2006 Env = Environment::CreateVirtualEnvironment(
2007 *CurrentCode, FileName,
2008 tooling::calculateRangesAfterReplacements(Fixes, Ranges),
2009 FirstStartColumn, NextStartColumn, LastStartColumn);
2014 return {Fixes, Penalty};
2016 } // namespace internal
2018 tooling::Replacements reformat(const FormatStyle &Style, StringRef Code,
2019 ArrayRef<tooling::Range> Ranges,
2021 FormattingAttemptStatus *Status) {
2022 return internal::reformat(Style, Code, Ranges,
2023 /*FirstStartColumn=*/0,
2024 /*NextStartColumn=*/0,
2025 /*LastStartColumn=*/0, FileName, Status)
2029 tooling::Replacements cleanup(const FormatStyle &Style, StringRef Code,
2030 ArrayRef<tooling::Range> Ranges,
2031 StringRef FileName) {
2032 // cleanups only apply to C++ (they mostly concern ctor commas etc.)
2033 if (Style.Language != FormatStyle::LK_Cpp)
2034 return tooling::Replacements();
2035 std::unique_ptr<Environment> Env =
2036 Environment::CreateVirtualEnvironment(Code, FileName, Ranges);
2037 Cleaner Clean(*Env, Style);
2038 return Clean.process().first;
2041 tooling::Replacements reformat(const FormatStyle &Style, StringRef Code,
2042 ArrayRef<tooling::Range> Ranges,
2043 StringRef FileName, bool *IncompleteFormat) {
2044 FormattingAttemptStatus Status;
2045 auto Result = reformat(Style, Code, Ranges, FileName, &Status);
2046 if (!Status.FormatComplete)
2047 *IncompleteFormat = true;
2051 tooling::Replacements fixNamespaceEndComments(const FormatStyle &Style,
2053 ArrayRef<tooling::Range> Ranges,
2054 StringRef FileName) {
2055 std::unique_ptr<Environment> Env =
2056 Environment::CreateVirtualEnvironment(Code, FileName, Ranges);
2057 NamespaceEndCommentsFixer Fix(*Env, Style);
2058 return Fix.process().first;
2061 tooling::Replacements sortUsingDeclarations(const FormatStyle &Style,
2063 ArrayRef<tooling::Range> Ranges,
2064 StringRef FileName) {
2065 std::unique_ptr<Environment> Env =
2066 Environment::CreateVirtualEnvironment(Code, FileName, Ranges);
2067 UsingDeclarationsSorter Sorter(*Env, Style);
2068 return Sorter.process().first;
2071 LangOptions getFormattingLangOpts(const FormatStyle &Style) {
2072 LangOptions LangOpts;
2073 LangOpts.CPlusPlus = 1;
2074 LangOpts.CPlusPlus11 = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
2075 LangOpts.CPlusPlus14 = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
2076 LangOpts.CPlusPlus17 = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
2077 LangOpts.CPlusPlus2a = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
2078 LangOpts.LineComment = 1;
2079 bool AlternativeOperators = Style.isCpp();
2080 LangOpts.CXXOperatorNames = AlternativeOperators ? 1 : 0;
2084 LangOpts.MicrosoftExt = 1; // To get kw___try, kw___finally.
2085 LangOpts.DeclSpecKeyword = 1; // To get __declspec.
2089 const char *StyleOptionHelpDescription =
2090 "Coding style, currently supports:\n"
2091 " LLVM, Google, Chromium, Mozilla, WebKit.\n"
2092 "Use -style=file to load style configuration from\n"
2093 ".clang-format file located in one of the parent\n"
2094 "directories of the source file (or current\n"
2095 "directory for stdin).\n"
2096 "Use -style=\"{key: value, ...}\" to set specific\n"
2097 "parameters, e.g.:\n"
2098 " -style=\"{BasedOnStyle: llvm, IndentWidth: 8}\"";
2100 static FormatStyle::LanguageKind getLanguageByFileName(StringRef FileName) {
2101 if (FileName.endswith(".java"))
2102 return FormatStyle::LK_Java;
2103 if (FileName.endswith_lower(".js") || FileName.endswith_lower(".ts"))
2104 return FormatStyle::LK_JavaScript; // JavaScript or TypeScript.
2105 if (FileName.endswith(".m") || FileName.endswith(".mm"))
2106 return FormatStyle::LK_ObjC;
2107 if (FileName.endswith_lower(".proto") ||
2108 FileName.endswith_lower(".protodevel"))
2109 return FormatStyle::LK_Proto;
2110 if (FileName.endswith_lower(".textpb") ||
2111 FileName.endswith_lower(".pb.txt") ||
2112 FileName.endswith_lower(".textproto") ||
2113 FileName.endswith_lower(".asciipb"))
2114 return FormatStyle::LK_TextProto;
2115 if (FileName.endswith_lower(".td"))
2116 return FormatStyle::LK_TableGen;
2117 return FormatStyle::LK_Cpp;
2120 llvm::Expected<FormatStyle> getStyle(StringRef StyleName, StringRef FileName,
2121 StringRef FallbackStyleName,
2122 StringRef Code, vfs::FileSystem *FS) {
2124 FS = vfs::getRealFileSystem().get();
2126 FormatStyle Style = getLLVMStyle();
2127 Style.Language = getLanguageByFileName(FileName);
2129 // This is a very crude detection of whether a header contains ObjC code that
2130 // should be improved over time and probably be done on tokens, not one the
2131 // bare content of the file.
2132 if (Style.Language == FormatStyle::LK_Cpp && FileName.endswith(".h") &&
2133 (Code.contains("\n- (") || Code.contains("\n+ (") ||
2134 Code.contains("\n@end\n") || Code.contains("\n@end ") ||
2135 Code.endswith("@end")))
2136 Style.Language = FormatStyle::LK_ObjC;
2138 FormatStyle FallbackStyle = getNoStyle();
2139 if (!getPredefinedStyle(FallbackStyleName, Style.Language, &FallbackStyle))
2140 return make_string_error("Invalid fallback style \"" + FallbackStyleName);
2142 if (StyleName.startswith("{")) {
2143 // Parse YAML/JSON style from the command line.
2144 if (std::error_code ec = parseConfiguration(StyleName, &Style))
2145 return make_string_error("Error parsing -style: " + ec.message());
2149 if (!StyleName.equals_lower("file")) {
2150 if (!getPredefinedStyle(StyleName, Style.Language, &Style))
2151 return make_string_error("Invalid value for -style");
2155 // Look for .clang-format/_clang-format file in the file's parent directories.
2156 SmallString<128> UnsuitableConfigFiles;
2157 SmallString<128> Path(FileName);
2158 if (std::error_code EC = FS->makeAbsolute(Path))
2159 return make_string_error(EC.message());
2161 for (StringRef Directory = Path; !Directory.empty();
2162 Directory = llvm::sys::path::parent_path(Directory)) {
2164 auto Status = FS->status(Directory);
2166 Status->getType() != llvm::sys::fs::file_type::directory_file) {
2170 SmallString<128> ConfigFile(Directory);
2172 llvm::sys::path::append(ConfigFile, ".clang-format");
2173 DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
2175 Status = FS->status(ConfigFile.str());
2176 bool FoundConfigFile =
2177 Status && (Status->getType() == llvm::sys::fs::file_type::regular_file);
2178 if (!FoundConfigFile) {
2179 // Try _clang-format too, since dotfiles are not commonly used on Windows.
2180 ConfigFile = Directory;
2181 llvm::sys::path::append(ConfigFile, "_clang-format");
2182 DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
2183 Status = FS->status(ConfigFile.str());
2184 FoundConfigFile = Status && (Status->getType() ==
2185 llvm::sys::fs::file_type::regular_file);
2188 if (FoundConfigFile) {
2189 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Text =
2190 FS->getBufferForFile(ConfigFile.str());
2191 if (std::error_code EC = Text.getError())
2192 return make_string_error(EC.message());
2193 if (std::error_code ec =
2194 parseConfiguration(Text.get()->getBuffer(), &Style)) {
2195 if (ec == ParseError::Unsuitable) {
2196 if (!UnsuitableConfigFiles.empty())
2197 UnsuitableConfigFiles.append(", ");
2198 UnsuitableConfigFiles.append(ConfigFile);
2201 return make_string_error("Error reading " + ConfigFile + ": " +
2204 DEBUG(llvm::dbgs() << "Using configuration file " << ConfigFile << "\n");
2208 if (!UnsuitableConfigFiles.empty())
2209 return make_string_error("Configuration file(s) do(es) not support " +
2210 getLanguageName(Style.Language) + ": " +
2211 UnsuitableConfigFiles);
2212 return FallbackStyle;
2215 } // namespace format
2216 } // namespace clang