maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/lib/Format/Format.cpp

2414 lines
96 KiB
C++
Raw Blame History

//===--- Format.cpp - Format C++ code -------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file implements functions declared in Format.h. This will be
/// split into separate files as we go.
///
//===----------------------------------------------------------------------===//
#include "clang/Format/Format.h"
#include "AffectedRangeManager.h"
#include "ContinuationIndenter.h"
#include "FormatInternal.h"
#include "FormatTokenLexer.h"
#include "NamespaceEndCommentsFixer.h"
#include "SortJavaScriptImports.h"
#include "TokenAnalyzer.h"
#include "TokenAnnotator.h"
#include "UnwrappedLineFormatter.h"
#include "UnwrappedLineParser.h"
#include "UsingDeclarationsSorter.h"
#include "WhitespaceManager.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/VirtualFileSystem.h"
#include "clang/Lex/Lexer.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Regex.h"
#include "llvm/Support/YAMLTraits.h"
#include <algorithm>
#include <memory>
#include <string>
#define DEBUG_TYPE "format-formatter"
using clang::format::FormatStyle;
LLVM_YAML_IS_SEQUENCE_VECTOR(clang::format::FormatStyle::IncludeCategory)
LLVM_YAML_IS_SEQUENCE_VECTOR(clang::format::FormatStyle::RawStringFormat)
namespace llvm {
namespace yaml {
template <> struct ScalarEnumerationTraits<FormatStyle::LanguageKind> {
static void enumeration(IO &IO, FormatStyle::LanguageKind &Value) {
IO.enumCase(Value, "Cpp", FormatStyle::LK_Cpp);
IO.enumCase(Value, "Java", FormatStyle::LK_Java);
IO.enumCase(Value, "JavaScript", FormatStyle::LK_JavaScript);
IO.enumCase(Value, "ObjC", FormatStyle::LK_ObjC);
IO.enumCase(Value, "Proto", FormatStyle::LK_Proto);
IO.enumCase(Value, "TableGen", FormatStyle::LK_TableGen);
IO.enumCase(Value, "TextProto", FormatStyle::LK_TextProto);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::LanguageStandard> {
static void enumeration(IO &IO, FormatStyle::LanguageStandard &Value) {
IO.enumCase(Value, "Cpp03", FormatStyle::LS_Cpp03);
IO.enumCase(Value, "C++03", FormatStyle::LS_Cpp03);
IO.enumCase(Value, "Cpp11", FormatStyle::LS_Cpp11);
IO.enumCase(Value, "C++11", FormatStyle::LS_Cpp11);
IO.enumCase(Value, "Auto", FormatStyle::LS_Auto);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::UseTabStyle> {
static void enumeration(IO &IO, FormatStyle::UseTabStyle &Value) {
IO.enumCase(Value, "Never", FormatStyle::UT_Never);
IO.enumCase(Value, "false", FormatStyle::UT_Never);
IO.enumCase(Value, "Always", FormatStyle::UT_Always);
IO.enumCase(Value, "true", FormatStyle::UT_Always);
IO.enumCase(Value, "ForIndentation", FormatStyle::UT_ForIndentation);
IO.enumCase(Value, "ForContinuationAndIndentation",
FormatStyle::UT_ForContinuationAndIndentation);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::JavaScriptQuoteStyle> {
static void enumeration(IO &IO, FormatStyle::JavaScriptQuoteStyle &Value) {
IO.enumCase(Value, "Leave", FormatStyle::JSQS_Leave);
IO.enumCase(Value, "Single", FormatStyle::JSQS_Single);
IO.enumCase(Value, "Double", FormatStyle::JSQS_Double);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::ShortFunctionStyle> {
static void enumeration(IO &IO, FormatStyle::ShortFunctionStyle &Value) {
IO.enumCase(Value, "None", FormatStyle::SFS_None);
IO.enumCase(Value, "false", FormatStyle::SFS_None);
IO.enumCase(Value, "All", FormatStyle::SFS_All);
IO.enumCase(Value, "true", FormatStyle::SFS_All);
IO.enumCase(Value, "Inline", FormatStyle::SFS_Inline);
IO.enumCase(Value, "InlineOnly", FormatStyle::SFS_InlineOnly);
IO.enumCase(Value, "Empty", FormatStyle::SFS_Empty);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::BinPackStyle> {
static void enumeration(IO &IO, FormatStyle::BinPackStyle &Value) {
IO.enumCase(Value, "Auto", FormatStyle::BPS_Auto);
IO.enumCase(Value, "Always", FormatStyle::BPS_Always);
IO.enumCase(Value, "Never", FormatStyle::BPS_Never);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::BinaryOperatorStyle> {
static void enumeration(IO &IO, FormatStyle::BinaryOperatorStyle &Value) {
IO.enumCase(Value, "All", FormatStyle::BOS_All);
IO.enumCase(Value, "true", FormatStyle::BOS_All);
IO.enumCase(Value, "None", FormatStyle::BOS_None);
IO.enumCase(Value, "false", FormatStyle::BOS_None);
IO.enumCase(Value, "NonAssignment", FormatStyle::BOS_NonAssignment);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::BraceBreakingStyle> {
static void enumeration(IO &IO, FormatStyle::BraceBreakingStyle &Value) {
IO.enumCase(Value, "Attach", FormatStyle::BS_Attach);
IO.enumCase(Value, "Linux", FormatStyle::BS_Linux);
IO.enumCase(Value, "Mozilla", FormatStyle::BS_Mozilla);
IO.enumCase(Value, "Stroustrup", FormatStyle::BS_Stroustrup);
IO.enumCase(Value, "Allman", FormatStyle::BS_Allman);
IO.enumCase(Value, "GNU", FormatStyle::BS_GNU);
IO.enumCase(Value, "WebKit", FormatStyle::BS_WebKit);
IO.enumCase(Value, "Custom", FormatStyle::BS_Custom);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::BreakConstructorInitializersStyle> {
static void
enumeration(IO &IO, FormatStyle::BreakConstructorInitializersStyle &Value) {
IO.enumCase(Value, "BeforeColon", FormatStyle::BCIS_BeforeColon);
IO.enumCase(Value, "BeforeComma", FormatStyle::BCIS_BeforeComma);
IO.enumCase(Value, "AfterColon", FormatStyle::BCIS_AfterColon);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::PPDirectiveIndentStyle> {
static void enumeration(IO &IO, FormatStyle::PPDirectiveIndentStyle &Value) {
IO.enumCase(Value, "None", FormatStyle::PPDIS_None);
IO.enumCase(Value, "AfterHash", FormatStyle::PPDIS_AfterHash);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::ReturnTypeBreakingStyle> {
static void enumeration(IO &IO, FormatStyle::ReturnTypeBreakingStyle &Value) {
IO.enumCase(Value, "None", FormatStyle::RTBS_None);
IO.enumCase(Value, "All", FormatStyle::RTBS_All);
IO.enumCase(Value, "TopLevel", FormatStyle::RTBS_TopLevel);
IO.enumCase(Value, "TopLevelDefinitions",
FormatStyle::RTBS_TopLevelDefinitions);
IO.enumCase(Value, "AllDefinitions", FormatStyle::RTBS_AllDefinitions);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::DefinitionReturnTypeBreakingStyle> {
static void
enumeration(IO &IO, FormatStyle::DefinitionReturnTypeBreakingStyle &Value) {
IO.enumCase(Value, "None", FormatStyle::DRTBS_None);
IO.enumCase(Value, "All", FormatStyle::DRTBS_All);
IO.enumCase(Value, "TopLevel", FormatStyle::DRTBS_TopLevel);
// For backward compatibility.
IO.enumCase(Value, "false", FormatStyle::DRTBS_None);
IO.enumCase(Value, "true", FormatStyle::DRTBS_All);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::NamespaceIndentationKind> {
static void enumeration(IO &IO,
FormatStyle::NamespaceIndentationKind &Value) {
IO.enumCase(Value, "None", FormatStyle::NI_None);
IO.enumCase(Value, "Inner", FormatStyle::NI_Inner);
IO.enumCase(Value, "All", FormatStyle::NI_All);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::BracketAlignmentStyle> {
static void enumeration(IO &IO, FormatStyle::BracketAlignmentStyle &Value) {
IO.enumCase(Value, "Align", FormatStyle::BAS_Align);
IO.enumCase(Value, "DontAlign", FormatStyle::BAS_DontAlign);
IO.enumCase(Value, "AlwaysBreak", FormatStyle::BAS_AlwaysBreak);
// For backward compatibility.
IO.enumCase(Value, "true", FormatStyle::BAS_Align);
IO.enumCase(Value, "false", FormatStyle::BAS_DontAlign);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::EscapedNewlineAlignmentStyle> {
static void enumeration(IO &IO,
FormatStyle::EscapedNewlineAlignmentStyle &Value) {
IO.enumCase(Value, "DontAlign", FormatStyle::ENAS_DontAlign);
IO.enumCase(Value, "Left", FormatStyle::ENAS_Left);
IO.enumCase(Value, "Right", FormatStyle::ENAS_Right);
// For backward compatibility.
IO.enumCase(Value, "true", FormatStyle::ENAS_Left);
IO.enumCase(Value, "false", FormatStyle::ENAS_Right);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::PointerAlignmentStyle> {
static void enumeration(IO &IO, FormatStyle::PointerAlignmentStyle &Value) {
IO.enumCase(Value, "Middle", FormatStyle::PAS_Middle);
IO.enumCase(Value, "Left", FormatStyle::PAS_Left);
IO.enumCase(Value, "Right", FormatStyle::PAS_Right);
// For backward compatibility.
IO.enumCase(Value, "true", FormatStyle::PAS_Left);
IO.enumCase(Value, "false", FormatStyle::PAS_Right);
}
};
template <>
struct ScalarEnumerationTraits<FormatStyle::SpaceBeforeParensOptions> {
static void enumeration(IO &IO,
FormatStyle::SpaceBeforeParensOptions &Value) {
IO.enumCase(Value, "Never", FormatStyle::SBPO_Never);
IO.enumCase(Value, "ControlStatements",
FormatStyle::SBPO_ControlStatements);
IO.enumCase(Value, "Always", FormatStyle::SBPO_Always);
// For backward compatibility.
IO.enumCase(Value, "false", FormatStyle::SBPO_Never);
IO.enumCase(Value, "true", FormatStyle::SBPO_ControlStatements);
}
};
template <> struct MappingTraits<FormatStyle> {
static void mapping(IO &IO, FormatStyle &Style) {
// When reading, read the language first, we need it for getPredefinedStyle.
IO.mapOptional("Language", Style.Language);
if (IO.outputting()) {
StringRef StylesArray[] = {"LLVM", "Google", "Chromium",
"Mozilla", "WebKit", "GNU"};
ArrayRef<StringRef> Styles(StylesArray);
for (size_t i = 0, e = Styles.size(); i < e; ++i) {
StringRef StyleName(Styles[i]);
FormatStyle PredefinedStyle;
if (getPredefinedStyle(StyleName, Style.Language, &PredefinedStyle) &&
Style == PredefinedStyle) {
IO.mapOptional("# BasedOnStyle", StyleName);
break;
}
}
} else {
StringRef BasedOnStyle;
IO.mapOptional("BasedOnStyle", BasedOnStyle);
if (!BasedOnStyle.empty()) {
FormatStyle::LanguageKind OldLanguage = Style.Language;
FormatStyle::LanguageKind Language =
((FormatStyle *)IO.getContext())->Language;
if (!getPredefinedStyle(BasedOnStyle, Language, &Style)) {
IO.setError(Twine("Unknown value for BasedOnStyle: ", BasedOnStyle));
return;
}
Style.Language = OldLanguage;
}
}
// For backward compatibility.
if (!IO.outputting()) {
IO.mapOptional("AlignEscapedNewlinesLeft", Style.AlignEscapedNewlines);
IO.mapOptional("DerivePointerBinding", Style.DerivePointerAlignment);
IO.mapOptional("IndentFunctionDeclarationAfterType",
Style.IndentWrappedFunctionNames);
IO.mapOptional("PointerBindsToType", Style.PointerAlignment);
IO.mapOptional("SpaceAfterControlStatementKeyword",
Style.SpaceBeforeParens);
}
IO.mapOptional("AccessModifierOffset", Style.AccessModifierOffset);
IO.mapOptional("AlignAfterOpenBracket", Style.AlignAfterOpenBracket);
IO.mapOptional("AlignConsecutiveAssignments",
Style.AlignConsecutiveAssignments);
IO.mapOptional("AlignConsecutiveDeclarations",
Style.AlignConsecutiveDeclarations);
IO.mapOptional("AlignEscapedNewlines", Style.AlignEscapedNewlines);
IO.mapOptional("AlignOperands", Style.AlignOperands);
IO.mapOptional("AlignTrailingComments", Style.AlignTrailingComments);
IO.mapOptional("AllowAllParametersOfDeclarationOnNextLine",
Style.AllowAllParametersOfDeclarationOnNextLine);
IO.mapOptional("AllowShortBlocksOnASingleLine",
Style.AllowShortBlocksOnASingleLine);
IO.mapOptional("AllowShortCaseLabelsOnASingleLine",
Style.AllowShortCaseLabelsOnASingleLine);
IO.mapOptional("AllowShortFunctionsOnASingleLine",
Style.AllowShortFunctionsOnASingleLine);
IO.mapOptional("AllowShortIfStatementsOnASingleLine",
Style.AllowShortIfStatementsOnASingleLine);
IO.mapOptional("AllowShortLoopsOnASingleLine",
Style.AllowShortLoopsOnASingleLine);
IO.mapOptional("AlwaysBreakAfterDefinitionReturnType",
Style.AlwaysBreakAfterDefinitionReturnType);
IO.mapOptional("AlwaysBreakAfterReturnType",
Style.AlwaysBreakAfterReturnType);
// If AlwaysBreakAfterDefinitionReturnType was specified but
// AlwaysBreakAfterReturnType was not, initialize the latter from the
// former for backwards compatibility.
if (Style.AlwaysBreakAfterDefinitionReturnType != FormatStyle::DRTBS_None &&
Style.AlwaysBreakAfterReturnType == FormatStyle::RTBS_None) {
if (Style.AlwaysBreakAfterDefinitionReturnType == FormatStyle::DRTBS_All)
Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_AllDefinitions;
else if (Style.AlwaysBreakAfterDefinitionReturnType ==
FormatStyle::DRTBS_TopLevel)
Style.AlwaysBreakAfterReturnType =
FormatStyle::RTBS_TopLevelDefinitions;
}
IO.mapOptional("AlwaysBreakBeforeMultilineStrings",
Style.AlwaysBreakBeforeMultilineStrings);
IO.mapOptional("AlwaysBreakTemplateDeclarations",
Style.AlwaysBreakTemplateDeclarations);
IO.mapOptional("BinPackArguments", Style.BinPackArguments);
IO.mapOptional("BinPackParameters", Style.BinPackParameters);
IO.mapOptional("BraceWrapping", Style.BraceWrapping);
IO.mapOptional("BreakBeforeBinaryOperators",
Style.BreakBeforeBinaryOperators);
IO.mapOptional("BreakBeforeBraces", Style.BreakBeforeBraces);
IO.mapOptional("BreakBeforeInheritanceComma",
Style.BreakBeforeInheritanceComma);
IO.mapOptional("BreakBeforeTernaryOperators",
Style.BreakBeforeTernaryOperators);
bool BreakConstructorInitializersBeforeComma = false;
IO.mapOptional("BreakConstructorInitializersBeforeComma",
BreakConstructorInitializersBeforeComma);
IO.mapOptional("BreakConstructorInitializers",
Style.BreakConstructorInitializers);
// If BreakConstructorInitializersBeforeComma was specified but
// BreakConstructorInitializers was not, initialize the latter from the
// former for backwards compatibility.
if (BreakConstructorInitializersBeforeComma &&
Style.BreakConstructorInitializers == FormatStyle::BCIS_BeforeColon)
Style.BreakConstructorInitializers = FormatStyle::BCIS_BeforeComma;
IO.mapOptional("BreakAfterJavaFieldAnnotations",
Style.BreakAfterJavaFieldAnnotations);
IO.mapOptional("BreakStringLiterals", Style.BreakStringLiterals);
IO.mapOptional("ColumnLimit", Style.ColumnLimit);
IO.mapOptional("CommentPragmas", Style.CommentPragmas);
IO.mapOptional("CompactNamespaces", Style.CompactNamespaces);
IO.mapOptional("ConstructorInitializerAllOnOneLineOrOnePerLine",
Style.ConstructorInitializerAllOnOneLineOrOnePerLine);
IO.mapOptional("ConstructorInitializerIndentWidth",
Style.ConstructorInitializerIndentWidth);
IO.mapOptional("ContinuationIndentWidth", Style.ContinuationIndentWidth);
IO.mapOptional("Cpp11BracedListStyle", Style.Cpp11BracedListStyle);
IO.mapOptional("DerivePointerAlignment", Style.DerivePointerAlignment);
IO.mapOptional("DisableFormat", Style.DisableFormat);
IO.mapOptional("ExperimentalAutoDetectBinPacking",
Style.ExperimentalAutoDetectBinPacking);
IO.mapOptional("FixNamespaceComments", Style.FixNamespaceComments);
IO.mapOptional("ForEachMacros", Style.ForEachMacros);
IO.mapOptional("IncludeBlocks", Style.IncludeBlocks);
IO.mapOptional("IncludeCategories", Style.IncludeCategories);
IO.mapOptional("IncludeIsMainRegex", Style.IncludeIsMainRegex);
IO.mapOptional("IndentCaseLabels", Style.IndentCaseLabels);
IO.mapOptional("IndentPPDirectives", Style.IndentPPDirectives);
IO.mapOptional("IndentWidth", Style.IndentWidth);
IO.mapOptional("IndentWrappedFunctionNames",
Style.IndentWrappedFunctionNames);
IO.mapOptional("JavaScriptQuotes", Style.JavaScriptQuotes);
IO.mapOptional("JavaScriptWrapImports", Style.JavaScriptWrapImports);
IO.mapOptional("KeepEmptyLinesAtTheStartOfBlocks",
Style.KeepEmptyLinesAtTheStartOfBlocks);
IO.mapOptional("MacroBlockBegin", Style.MacroBlockBegin);
IO.mapOptional("MacroBlockEnd", Style.MacroBlockEnd);
IO.mapOptional("MaxEmptyLinesToKeep", Style.MaxEmptyLinesToKeep);
IO.mapOptional("NamespaceIndentation", Style.NamespaceIndentation);
IO.mapOptional("ObjCBinPackProtocolList", Style.ObjCBinPackProtocolList);
IO.mapOptional("ObjCBlockIndentWidth", Style.ObjCBlockIndentWidth);
IO.mapOptional("ObjCSpaceAfterProperty", Style.ObjCSpaceAfterProperty);
IO.mapOptional("ObjCSpaceBeforeProtocolList",
Style.ObjCSpaceBeforeProtocolList);
IO.mapOptional("PenaltyBreakAssignment", Style.PenaltyBreakAssignment);
IO.mapOptional("PenaltyBreakBeforeFirstCallParameter",
Style.PenaltyBreakBeforeFirstCallParameter);
IO.mapOptional("PenaltyBreakComment", Style.PenaltyBreakComment);
IO.mapOptional("PenaltyBreakFirstLessLess",
Style.PenaltyBreakFirstLessLess);
IO.mapOptional("PenaltyBreakString", Style.PenaltyBreakString);
IO.mapOptional("PenaltyExcessCharacter", Style.PenaltyExcessCharacter);
IO.mapOptional("PenaltyReturnTypeOnItsOwnLine",
Style.PenaltyReturnTypeOnItsOwnLine);
IO.mapOptional("PointerAlignment", Style.PointerAlignment);
IO.mapOptional("RawStringFormats", Style.RawStringFormats);
IO.mapOptional("ReflowComments", Style.ReflowComments);
IO.mapOptional("SortIncludes", Style.SortIncludes);
IO.mapOptional("SortUsingDeclarations", Style.SortUsingDeclarations);
IO.mapOptional("SpaceAfterCStyleCast", Style.SpaceAfterCStyleCast);
IO.mapOptional("SpaceAfterTemplateKeyword",
Style.SpaceAfterTemplateKeyword);
IO.mapOptional("SpaceBeforeAssignmentOperators",
Style.SpaceBeforeAssignmentOperators);
IO.mapOptional("SpaceBeforeCtorInitializerColon",
Style.SpaceBeforeCtorInitializerColon);
IO.mapOptional("SpaceBeforeInheritanceColon",
Style.SpaceBeforeInheritanceColon);
IO.mapOptional("SpaceBeforeParens", Style.SpaceBeforeParens);
IO.mapOptional("SpaceBeforeRangeBasedForLoopColon",
Style.SpaceBeforeRangeBasedForLoopColon);
IO.mapOptional("SpaceInEmptyParentheses", Style.SpaceInEmptyParentheses);
IO.mapOptional("SpacesBeforeTrailingComments",
Style.SpacesBeforeTrailingComments);
IO.mapOptional("SpacesInAngles", Style.SpacesInAngles);
IO.mapOptional("SpacesInContainerLiterals",
Style.SpacesInContainerLiterals);
IO.mapOptional("SpacesInCStyleCastParentheses",
Style.SpacesInCStyleCastParentheses);
IO.mapOptional("SpacesInParentheses", Style.SpacesInParentheses);
IO.mapOptional("SpacesInSquareBrackets", Style.SpacesInSquareBrackets);
IO.mapOptional("Standard", Style.Standard);
IO.mapOptional("TabWidth", Style.TabWidth);
IO.mapOptional("UseTab", Style.UseTab);
}
};
template <> struct MappingTraits<FormatStyle::BraceWrappingFlags> {
static void mapping(IO &IO, FormatStyle::BraceWrappingFlags &Wrapping) {
IO.mapOptional("AfterClass", Wrapping.AfterClass);
IO.mapOptional("AfterControlStatement", Wrapping.AfterControlStatement);
IO.mapOptional("AfterEnum", Wrapping.AfterEnum);
IO.mapOptional("AfterFunction", Wrapping.AfterFunction);
IO.mapOptional("AfterNamespace", Wrapping.AfterNamespace);
IO.mapOptional("AfterObjCDeclaration", Wrapping.AfterObjCDeclaration);
IO.mapOptional("AfterStruct", Wrapping.AfterStruct);
IO.mapOptional("AfterUnion", Wrapping.AfterUnion);
IO.mapOptional("AfterExternBlock", Wrapping.AfterExternBlock);
IO.mapOptional("BeforeCatch", Wrapping.BeforeCatch);
IO.mapOptional("BeforeElse", Wrapping.BeforeElse);
IO.mapOptional("IndentBraces", Wrapping.IndentBraces);
IO.mapOptional("SplitEmptyFunction", Wrapping.SplitEmptyFunction);
IO.mapOptional("SplitEmptyRecord", Wrapping.SplitEmptyRecord);
IO.mapOptional("SplitEmptyNamespace", Wrapping.SplitEmptyNamespace);
}
};
template <> struct MappingTraits<FormatStyle::IncludeCategory> {
static void mapping(IO &IO, FormatStyle::IncludeCategory &Category) {
IO.mapOptional("Regex", Category.Regex);
IO.mapOptional("Priority", Category.Priority);
}
};
template <> struct ScalarEnumerationTraits<FormatStyle::IncludeBlocksStyle> {
static void enumeration(IO &IO, FormatStyle::IncludeBlocksStyle &Value) {
IO.enumCase(Value, "Preserve", FormatStyle::IBS_Preserve);
IO.enumCase(Value, "Merge", FormatStyle::IBS_Merge);
IO.enumCase(Value, "Regroup", FormatStyle::IBS_Regroup);
}
};
template <> struct MappingTraits<FormatStyle::RawStringFormat> {
static void mapping(IO &IO, FormatStyle::RawStringFormat &Format) {
IO.mapOptional("Language", Format.Language);
IO.mapOptional("Delimiters", Format.Delimiters);
IO.mapOptional("EnclosingFunctions", Format.EnclosingFunctions);
IO.mapOptional("CanonicalDelimiter", Format.CanonicalDelimiter);
IO.mapOptional("BasedOnStyle", Format.BasedOnStyle);
}
};
// Allows to read vector<FormatStyle> while keeping default values.
// IO.getContext() should contain a pointer to the FormatStyle structure, that
// will be used to get default values for missing keys.
// If the first element has no Language specified, it will be treated as the
// default one for the following elements.
template <> struct DocumentListTraits<std::vector<FormatStyle>> {
static size_t size(IO &IO, std::vector<FormatStyle> &Seq) {
return Seq.size();
}
static FormatStyle &element(IO &IO, std::vector<FormatStyle> &Seq,
size_t Index) {
if (Index >= Seq.size()) {
assert(Index == Seq.size());
FormatStyle Template;
if (!Seq.empty() && Seq[0].Language == FormatStyle::LK_None) {
Template = Seq[0];
} else {
Template = *((const FormatStyle *)IO.getContext());
Template.Language = FormatStyle::LK_None;
}
Seq.resize(Index + 1, Template);
}
return Seq[Index];
}
};
} // namespace yaml
} // namespace llvm
namespace clang {
namespace format {
const std::error_category &getParseCategory() {
static ParseErrorCategory C;
return C;
}
std::error_code make_error_code(ParseError e) {
return std::error_code(static_cast<int>(e), getParseCategory());
}
inline llvm::Error make_string_error(const llvm::Twine &Message) {
return llvm::make_error<llvm::StringError>(Message,
llvm::inconvertibleErrorCode());
}
const char *ParseErrorCategory::name() const noexcept {
return "clang-format.parse_error";
}
std::string ParseErrorCategory::message(int EV) const {
switch (static_cast<ParseError>(EV)) {
case ParseError::Success:
return "Success";
case ParseError::Error:
return "Invalid argument";
case ParseError::Unsuitable:
return "Unsuitable";
}
llvm_unreachable("unexpected parse error");
}
static FormatStyle expandPresets(const FormatStyle &Style) {
if (Style.BreakBeforeBraces == FormatStyle::BS_Custom)
return Style;
FormatStyle Expanded = Style;
Expanded.BraceWrapping = {false, false, false, false, false,
false, false, false, false, false,
false, false, true, true, true};
switch (Style.BreakBeforeBraces) {
case FormatStyle::BS_Linux:
Expanded.BraceWrapping.AfterClass = true;
Expanded.BraceWrapping.AfterFunction = true;
Expanded.BraceWrapping.AfterNamespace = true;
break;
case FormatStyle::BS_Mozilla:
Expanded.BraceWrapping.AfterClass = true;
Expanded.BraceWrapping.AfterEnum = true;
Expanded.BraceWrapping.AfterFunction = true;
Expanded.BraceWrapping.AfterStruct = true;
Expanded.BraceWrapping.AfterUnion = true;
Expanded.BraceWrapping.AfterExternBlock = true;
Expanded.BraceWrapping.SplitEmptyFunction = true;
Expanded.BraceWrapping.SplitEmptyRecord = false;
break;
case FormatStyle::BS_Stroustrup:
Expanded.BraceWrapping.AfterFunction = true;
Expanded.BraceWrapping.BeforeCatch = true;
Expanded.BraceWrapping.BeforeElse = true;
break;
case FormatStyle::BS_Allman:
Expanded.BraceWrapping.AfterClass = true;
Expanded.BraceWrapping.AfterControlStatement = true;
Expanded.BraceWrapping.AfterEnum = true;
Expanded.BraceWrapping.AfterFunction = true;
Expanded.BraceWrapping.AfterNamespace = true;
Expanded.BraceWrapping.AfterObjCDeclaration = true;
Expanded.BraceWrapping.AfterStruct = true;
Expanded.BraceWrapping.AfterExternBlock = true;
Expanded.BraceWrapping.BeforeCatch = true;
Expanded.BraceWrapping.BeforeElse = true;
break;
case FormatStyle::BS_GNU:
Expanded.BraceWrapping = {true, true, true, true, true, true, true, true,
true, true, true, true, true, true, true};
break;
case FormatStyle::BS_WebKit:
Expanded.BraceWrapping.AfterFunction = true;
break;
default:
break;
}
return Expanded;
}
FormatStyle getLLVMStyle() {
FormatStyle LLVMStyle;
LLVMStyle.Language = FormatStyle::LK_Cpp;
LLVMStyle.AccessModifierOffset = -2;
LLVMStyle.AlignEscapedNewlines = FormatStyle::ENAS_Right;
LLVMStyle.AlignAfterOpenBracket = FormatStyle::BAS_Align;
LLVMStyle.AlignOperands = true;
LLVMStyle.AlignTrailingComments = true;
LLVMStyle.AlignConsecutiveAssignments = false;
LLVMStyle.AlignConsecutiveDeclarations = false;
LLVMStyle.AllowAllParametersOfDeclarationOnNextLine = true;
LLVMStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_All;
LLVMStyle.AllowShortBlocksOnASingleLine = false;
LLVMStyle.AllowShortCaseLabelsOnASingleLine = false;
LLVMStyle.AllowShortIfStatementsOnASingleLine = false;
LLVMStyle.AllowShortLoopsOnASingleLine = false;
LLVMStyle.AlwaysBreakAfterReturnType = FormatStyle::RTBS_None;
LLVMStyle.AlwaysBreakAfterDefinitionReturnType = FormatStyle::DRTBS_None;
LLVMStyle.AlwaysBreakBeforeMultilineStrings = false;
LLVMStyle.AlwaysBreakTemplateDeclarations = false;
LLVMStyle.BinPackArguments = true;
LLVMStyle.BinPackParameters = true;
LLVMStyle.BreakBeforeBinaryOperators = FormatStyle::BOS_None;
LLVMStyle.BreakBeforeTernaryOperators = true;
LLVMStyle.BreakBeforeBraces = FormatStyle::BS_Attach;
LLVMStyle.BraceWrapping = {false, false, false, false, false,
false, false, false, false, false,
false, false, true, true, true};
LLVMStyle.BreakAfterJavaFieldAnnotations = false;
LLVMStyle.BreakConstructorInitializers = FormatStyle::BCIS_BeforeColon;
LLVMStyle.BreakBeforeInheritanceComma = false;
LLVMStyle.BreakStringLiterals = true;
LLVMStyle.ColumnLimit = 80;
LLVMStyle.CommentPragmas = "^ IWYU pragma:";
LLVMStyle.CompactNamespaces = false;
LLVMStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = false;
LLVMStyle.ConstructorInitializerIndentWidth = 4;
LLVMStyle.ContinuationIndentWidth = 4;
LLVMStyle.Cpp11BracedListStyle = true;
LLVMStyle.DerivePointerAlignment = false;
LLVMStyle.ExperimentalAutoDetectBinPacking = false;
LLVMStyle.FixNamespaceComments = true;
LLVMStyle.ForEachMacros.push_back("foreach");
LLVMStyle.ForEachMacros.push_back("Q_FOREACH");
LLVMStyle.ForEachMacros.push_back("BOOST_FOREACH");
LLVMStyle.IncludeCategories = {{"^\"(llvm|llvm-c|clang|clang-c)/", 2},
{"^(<|\"(gtest|gmock|isl|json)/)", 3},
{".*", 1}};
LLVMStyle.IncludeIsMainRegex = "(Test)?$";
LLVMStyle.IncludeBlocks = FormatStyle::IBS_Preserve;
LLVMStyle.IndentCaseLabels = false;
LLVMStyle.IndentPPDirectives = FormatStyle::PPDIS_None;
LLVMStyle.IndentWrappedFunctionNames = false;
LLVMStyle.IndentWidth = 2;
LLVMStyle.JavaScriptQuotes = FormatStyle::JSQS_Leave;
LLVMStyle.JavaScriptWrapImports = true;
LLVMStyle.TabWidth = 8;
LLVMStyle.MaxEmptyLinesToKeep = 1;
LLVMStyle.KeepEmptyLinesAtTheStartOfBlocks = true;
LLVMStyle.NamespaceIndentation = FormatStyle::NI_None;
LLVMStyle.ObjCBinPackProtocolList = FormatStyle::BPS_Auto;
LLVMStyle.ObjCBlockIndentWidth = 2;
LLVMStyle.ObjCSpaceAfterProperty = false;
LLVMStyle.ObjCSpaceBeforeProtocolList = true;
LLVMStyle.PointerAlignment = FormatStyle::PAS_Right;
LLVMStyle.SpacesBeforeTrailingComments = 1;
LLVMStyle.Standard = FormatStyle::LS_Cpp11;
LLVMStyle.UseTab = FormatStyle::UT_Never;
LLVMStyle.ReflowComments = true;
LLVMStyle.SpacesInParentheses = false;
LLVMStyle.SpacesInSquareBrackets = false;
LLVMStyle.SpaceInEmptyParentheses = false;
LLVMStyle.SpacesInContainerLiterals = true;
LLVMStyle.SpacesInCStyleCastParentheses = false;
LLVMStyle.SpaceAfterCStyleCast = false;
LLVMStyle.SpaceAfterTemplateKeyword = true;
LLVMStyle.SpaceBeforeCtorInitializerColon = true;
LLVMStyle.SpaceBeforeInheritanceColon = true;
LLVMStyle.SpaceBeforeParens = FormatStyle::SBPO_ControlStatements;
LLVMStyle.SpaceBeforeRangeBasedForLoopColon = true;
LLVMStyle.SpaceBeforeAssignmentOperators = true;
LLVMStyle.SpacesInAngles = false;
LLVMStyle.PenaltyBreakAssignment = prec::Assignment;
LLVMStyle.PenaltyBreakComment = 300;
LLVMStyle.PenaltyBreakFirstLessLess = 120;
LLVMStyle.PenaltyBreakString = 1000;
LLVMStyle.PenaltyExcessCharacter = 1000000;
LLVMStyle.PenaltyReturnTypeOnItsOwnLine = 60;
LLVMStyle.PenaltyBreakBeforeFirstCallParameter = 19;
LLVMStyle.DisableFormat = false;
LLVMStyle.SortIncludes = true;
LLVMStyle.SortUsingDeclarations = true;
return LLVMStyle;
}
FormatStyle getGoogleStyle(FormatStyle::LanguageKind Language) {
if (Language == FormatStyle::LK_TextProto) {
FormatStyle GoogleStyle = getGoogleStyle(FormatStyle::LK_Proto);
GoogleStyle.Language = FormatStyle::LK_TextProto;
return GoogleStyle;
}
FormatStyle GoogleStyle = getLLVMStyle();
GoogleStyle.Language = Language;
GoogleStyle.AccessModifierOffset = -1;
GoogleStyle.AlignEscapedNewlines = FormatStyle::ENAS_Left;
GoogleStyle.AllowShortIfStatementsOnASingleLine = true;
GoogleStyle.AllowShortLoopsOnASingleLine = true;
GoogleStyle.AlwaysBreakBeforeMultilineStrings = true;
GoogleStyle.AlwaysBreakTemplateDeclarations = true;
GoogleStyle.ConstructorInitializerAllOnOneLineOrOnePerLine = true;
GoogleStyle.DerivePointerAlignment = true;
GoogleStyle.IncludeCategories = {
{"^<ext/.*\\.h>", 2}, {"^<.*\\.h>", 1}, {"^<.*", 2}, {".*", 3}};
GoogleStyle.IncludeIsMainRegex = "([-_](test|unittest))?$";
GoogleStyle.IndentCaseLabels = true;
GoogleStyle.KeepEmptyLinesAtTheStartOfBlocks = false;
GoogleStyle.ObjCBinPackProtocolList = FormatStyle::BPS_Never;
GoogleStyle.ObjCSpaceAfterProperty = false;
GoogleStyle.ObjCSpaceBeforeProtocolList = true;
GoogleStyle.PointerAlignment = FormatStyle::PAS_Left;
GoogleStyle.RawStringFormats = {{
FormatStyle::LK_TextProto,
/*Delimiters=*/
{
"pb",
"PB",
"proto",
"PROTO",
},
/*EnclosingFunctionNames=*/
{},
/*CanonicalDelimiter=*/"",
/*BasedOnStyle=*/"google",
}};
GoogleStyle.SpacesBeforeTrailingComments = 2;
GoogleStyle.Standard = FormatStyle::LS_Auto;
GoogleStyle.PenaltyReturnTypeOnItsOwnLine = 200;
GoogleStyle.PenaltyBreakBeforeFirstCallParameter = 1;
if (Language == FormatStyle::LK_Java) {
GoogleStyle.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
GoogleStyle.AlignOperands = false;
GoogleStyle.AlignTrailingComments = false;
GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty;
GoogleStyle.AllowShortIfStatementsOnASingleLine = false;
GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
GoogleStyle.BreakBeforeBinaryOperators = FormatStyle::BOS_NonAssignment;
GoogleStyle.ColumnLimit = 100;
GoogleStyle.SpaceAfterCStyleCast = true;
GoogleStyle.SpacesBeforeTrailingComments = 1;
} else if (Language == FormatStyle::LK_JavaScript) {
GoogleStyle.AlignAfterOpenBracket = FormatStyle::BAS_AlwaysBreak;
GoogleStyle.AlignOperands = false;
GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Empty;
GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
GoogleStyle.BreakBeforeTernaryOperators = false;
// taze:, triple slash directives (`/// <...`), @tag followed by { for a lot
// of JSDoc tags, and @see, which is commonly followed by overlong URLs.
GoogleStyle.CommentPragmas =
"(taze:|^/[ \t]*<|(@[A-Za-z_0-9-]+[ \\t]*{)|@see)";
GoogleStyle.MaxEmptyLinesToKeep = 3;
GoogleStyle.NamespaceIndentation = FormatStyle::NI_All;
GoogleStyle.SpacesInContainerLiterals = false;
GoogleStyle.JavaScriptQuotes = FormatStyle::JSQS_Single;
GoogleStyle.JavaScriptWrapImports = false;
} else if (Language == FormatStyle::LK_Proto) {
GoogleStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_None;
GoogleStyle.AlwaysBreakBeforeMultilineStrings = false;
GoogleStyle.SpacesInContainerLiterals = false;
GoogleStyle.Cpp11BracedListStyle = false;
// This affects protocol buffer options specifications and text protos.
// Text protos are currently mostly formatted inside C++ raw string literals
// and often the current breaking behavior of string literals is not
// beneficial there. Investigate turning this on once proper string reflow
// has been implemented.
GoogleStyle.BreakStringLiterals = false;
} else if (Language == FormatStyle::LK_ObjC) {
GoogleStyle.ColumnLimit = 100;
}
return GoogleStyle;
}
FormatStyle getChromiumStyle(FormatStyle::LanguageKind Language) {
FormatStyle ChromiumStyle = getGoogleStyle(Language);
if (Language == FormatStyle::LK_Java) {
ChromiumStyle.AllowShortIfStatementsOnASingleLine = true;
ChromiumStyle.BreakAfterJavaFieldAnnotations = true;
ChromiumStyle.ContinuationIndentWidth = 8;
ChromiumStyle.IndentWidth = 4;
} else if (Language == FormatStyle::LK_JavaScript) {
ChromiumStyle.AllowShortIfStatementsOnASingleLine = false;
ChromiumStyle.AllowShortLoopsOnASingleLine = false;
} else {
ChromiumStyle.AllowAllParametersOfDeclarationOnNextLine = false;
ChromiumStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
ChromiumStyle.AllowShortIfStatementsOnASingleLine = false;
ChromiumStyle.AllowShortLoopsOnASingleLine = false;
ChromiumStyle.BinPackParameters = false;
ChromiumStyle.DerivePointerAlignment = false;
if (Language == FormatStyle::LK_ObjC)
ChromiumStyle.ColumnLimit = 80;
}
return ChromiumStyle;
}
FormatStyle getMozillaStyle() {
FormatStyle MozillaStyle = getLLVMStyle();
MozillaStyle.AllowAllParametersOfDeclarationOnNextLine = false;
MozillaStyle.AllowShortFunctionsOnASingleLine = FormatStyle::SFS_Inline;
MozillaStyle.AlwaysBreakAfterReturnType = FormatStyle::RTBS_TopLevel;
MozillaStyle.AlwaysBreakAfterDefinitionReturnType =
FormatStyle::DRTBS_TopLevel;
MozillaStyle.AlwaysBreakTemplateDeclarations = true;
MozillaStyle.BinPackParameters = false;
MozillaStyle.BinPackArguments = false;
MozillaStyle.BreakBeforeBraces = FormatStyle::BS_Mozilla;
MozillaStyle.BreakConstructorInitializers = FormatStyle::BCIS_BeforeComma;
MozillaStyle.BreakBeforeInheritanceComma = true;
MozillaStyle.ConstructorInitializerIndentWidth = 2;
MozillaStyle.ContinuationIndentWidth = 2;
MozillaStyle.Cpp11BracedListStyle = false;
MozillaStyle.FixNamespaceComments = false;
MozillaStyle.IndentCaseLabels = true;
MozillaStyle.ObjCSpaceAfterProperty = true;
MozillaStyle.ObjCSpaceBeforeProtocolList = false;
MozillaStyle.PenaltyReturnTypeOnItsOwnLine = 200;
MozillaStyle.PointerAlignment = FormatStyle::PAS_Left;
MozillaStyle.SpaceAfterTemplateKeyword = false;
return MozillaStyle;
}
FormatStyle getWebKitStyle() {
FormatStyle Style = getLLVMStyle();
Style.AccessModifierOffset = -4;
Style.AlignAfterOpenBracket = FormatStyle::BAS_DontAlign;
Style.AlignOperands = false;
Style.AlignTrailingComments = false;
Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
Style.BreakBeforeBraces = FormatStyle::BS_WebKit;
Style.BreakConstructorInitializers = FormatStyle::BCIS_BeforeComma;
Style.Cpp11BracedListStyle = false;
Style.ColumnLimit = 0;
Style.FixNamespaceComments = false;
Style.IndentWidth = 4;
Style.NamespaceIndentation = FormatStyle::NI_Inner;
Style.ObjCBlockIndentWidth = 4;
Style.ObjCSpaceAfterProperty = true;
Style.PointerAlignment = FormatStyle::PAS_Left;
return Style;
}
FormatStyle getGNUStyle() {
FormatStyle Style = getLLVMStyle();
Style.AlwaysBreakAfterDefinitionReturnType = FormatStyle::DRTBS_All;
Style.AlwaysBreakAfterReturnType = FormatStyle::RTBS_AllDefinitions;
Style.BreakBeforeBinaryOperators = FormatStyle::BOS_All;
Style.BreakBeforeBraces = FormatStyle::BS_GNU;
Style.BreakBeforeTernaryOperators = true;
Style.Cpp11BracedListStyle = false;
Style.ColumnLimit = 79;
Style.FixNamespaceComments = false;
Style.SpaceBeforeParens = FormatStyle::SBPO_Always;
Style.Standard = FormatStyle::LS_Cpp03;
return Style;
}
FormatStyle getNoStyle() {
FormatStyle NoStyle = getLLVMStyle();
NoStyle.DisableFormat = true;
NoStyle.SortIncludes = false;
NoStyle.SortUsingDeclarations = false;
return NoStyle;
}
bool getPredefinedStyle(StringRef Name, FormatStyle::LanguageKind Language,
FormatStyle *Style) {
if (Name.equals_lower("llvm")) {
*Style = getLLVMStyle();
} else if (Name.equals_lower("chromium")) {
*Style = getChromiumStyle(Language);
} else if (Name.equals_lower("mozilla")) {
*Style = getMozillaStyle();
} else if (Name.equals_lower("google")) {
*Style = getGoogleStyle(Language);
} else if (Name.equals_lower("webkit")) {
*Style = getWebKitStyle();
} else if (Name.equals_lower("gnu")) {
*Style = getGNUStyle();
} else if (Name.equals_lower("none")) {
*Style = getNoStyle();
} else {
return false;
}
Style->Language = Language;
return true;
}
std::error_code parseConfiguration(StringRef Text, FormatStyle *Style) {
assert(Style);
FormatStyle::LanguageKind Language = Style->Language;
assert(Language != FormatStyle::LK_None);
if (Text.trim().empty())
return make_error_code(ParseError::Error);
Style->StyleSet.Clear();
std::vector<FormatStyle> Styles;
llvm::yaml::Input Input(Text);
// DocumentListTraits<vector<FormatStyle>> uses the context to get default
// values for the fields, keys for which are missing from the configuration.
// Mapping also uses the context to get the language to find the correct
// base style.
Input.setContext(Style);
Input >> Styles;
if (Input.error())
return Input.error();
for (unsigned i = 0; i < Styles.size(); ++i) {
// Ensures that only the first configuration can skip the Language option.
if (Styles[i].Language == FormatStyle::LK_None && i != 0)
return make_error_code(ParseError::Error);
// Ensure that each language is configured at most once.
for (unsigned j = 0; j < i; ++j) {
if (Styles[i].Language == Styles[j].Language) {
DEBUG(llvm::dbgs()
<< "Duplicate languages in the config file on positions " << j
<< " and " << i << "\n");
return make_error_code(ParseError::Error);
}
}
}
// Look for a suitable configuration starting from the end, so we can
// find the configuration for the specific language first, and the default
// configuration (which can only be at slot 0) after it.
FormatStyle::FormatStyleSet StyleSet;
bool LanguageFound = false;
for (int i = Styles.size() - 1; i >= 0; --i) {
if (Styles[i].Language != FormatStyle::LK_None)
StyleSet.Add(Styles[i]);
if (Styles[i].Language == Language)
LanguageFound = true;
}
if (!LanguageFound) {
if (Styles.empty() || Styles[0].Language != FormatStyle::LK_None)
return make_error_code(ParseError::Unsuitable);
FormatStyle DefaultStyle = Styles[0];
DefaultStyle.Language = Language;
StyleSet.Add(std::move(DefaultStyle));
}
*Style = *StyleSet.Get(Language);
return make_error_code(ParseError::Success);
}
std::string configurationAsText(const FormatStyle &Style) {
std::string Text;
llvm::raw_string_ostream Stream(Text);
llvm::yaml::Output Output(Stream);
// We use the same mapping method for input and output, so we need a non-const
// reference here.
FormatStyle NonConstStyle = expandPresets(Style);
Output << NonConstStyle;
return Stream.str();
}
llvm::Optional<FormatStyle>
FormatStyle::FormatStyleSet::Get(FormatStyle::LanguageKind Language) const {
if (!Styles)
return None;
auto It = Styles->find(Language);
if (It == Styles->end())
return None;
FormatStyle Style = It->second;
Style.StyleSet = *this;
return Style;
}
void FormatStyle::FormatStyleSet::Add(FormatStyle Style) {
assert(Style.Language != LK_None &&
"Cannot add a style for LK_None to a StyleSet");
assert(
!Style.StyleSet.Styles &&
"Cannot add a style associated with an existing StyleSet to a StyleSet");
if (!Styles)
Styles = std::make_shared<MapType>();
(*Styles)[Style.Language] = std::move(Style);
}
void FormatStyle::FormatStyleSet::Clear() {
Styles.reset();
}
llvm::Optional<FormatStyle>
FormatStyle::GetLanguageStyle(FormatStyle::LanguageKind Language) const {
return StyleSet.Get(Language);
}
namespace {
class JavaScriptRequoter : public TokenAnalyzer {
public:
JavaScriptRequoter(const Environment &Env, const FormatStyle &Style)
: TokenAnalyzer(Env, Style) {}
std::pair<tooling::Replacements, unsigned>
analyze(TokenAnnotator &Annotator,
SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
FormatTokenLexer &Tokens) override {
AffectedRangeMgr.computeAffectedLines(AnnotatedLines.begin(),
AnnotatedLines.end());
tooling::Replacements Result;
requoteJSStringLiteral(AnnotatedLines, Result);
return {Result, 0};
}
private:
// Replaces double/single-quoted string literal as appropriate, re-escaping
// the contents in the process.
void requoteJSStringLiteral(SmallVectorImpl<AnnotatedLine *> &Lines,
tooling::Replacements &Result) {
for (AnnotatedLine *Line : Lines) {
requoteJSStringLiteral(Line->Children, Result);
if (!Line->Affected)
continue;
for (FormatToken *FormatTok = Line->First; FormatTok;
FormatTok = FormatTok->Next) {
StringRef Input = FormatTok->TokenText;
if (FormatTok->Finalized || !FormatTok->isStringLiteral() ||
// NB: testing for not starting with a double quote to avoid
// breaking `template strings`.
(Style.JavaScriptQuotes == FormatStyle::JSQS_Single &&
!Input.startswith("\"")) ||
(Style.JavaScriptQuotes == FormatStyle::JSQS_Double &&
!Input.startswith("\'")))
continue;
// Change start and end quote.
bool IsSingle = Style.JavaScriptQuotes == FormatStyle::JSQS_Single;
SourceLocation Start = FormatTok->Tok.getLocation();
auto Replace = [&](SourceLocation Start, unsigned Length,
StringRef ReplacementText) {
auto Err = Result.add(tooling::Replacement(
Env.getSourceManager(), Start, Length, ReplacementText));
// FIXME: handle error. For now, print error message and skip the
// replacement for release version.
if (Err) {
llvm::errs() << llvm::toString(std::move(Err)) << "\n";
assert(false);
}
};
Replace(Start, 1, IsSingle ? "'" : "\"");
Replace(FormatTok->Tok.getEndLoc().getLocWithOffset(-1), 1,
IsSingle ? "'" : "\"");
// Escape internal quotes.
bool Escaped = false;
for (size_t i = 1; i < Input.size() - 1; i++) {
switch (Input[i]) {
case '\\':
if (!Escaped && i + 1 < Input.size() &&
((IsSingle && Input[i + 1] == '"') ||
(!IsSingle && Input[i + 1] == '\''))) {
// Remove this \, it's escaping a " or ' that no longer needs
// escaping
Replace(Start.getLocWithOffset(i), 1, "");
continue;
}
Escaped = !Escaped;
break;
case '\"':
case '\'':
if (!Escaped && IsSingle == (Input[i] == '\'')) {
// Escape the quote.
Replace(Start.getLocWithOffset(i), 0, "\\");
}
Escaped = false;
break;
default:
Escaped = false;
break;
}
}
}
}
}
};
class Formatter : public TokenAnalyzer {
public:
Formatter(const Environment &Env, const FormatStyle &Style,
FormattingAttemptStatus *Status)
: TokenAnalyzer(Env, Style), Status(Status) {}
std::pair<tooling::Replacements, unsigned>
analyze(TokenAnnotator &Annotator,
SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
FormatTokenLexer &Tokens) override {
tooling::Replacements Result;
deriveLocalStyle(AnnotatedLines);
AffectedRangeMgr.computeAffectedLines(AnnotatedLines.begin(),
AnnotatedLines.end());
for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
Annotator.calculateFormattingInformation(*AnnotatedLines[i]);
}
Annotator.setCommentLineLevels(AnnotatedLines);
WhitespaceManager Whitespaces(
Env.getSourceManager(), Style,
inputUsesCRLF(Env.getSourceManager().getBufferData(Env.getFileID())));
ContinuationIndenter Indenter(Style, Tokens.getKeywords(),
Env.getSourceManager(), Whitespaces, Encoding,
BinPackInconclusiveFunctions);
unsigned Penalty =
UnwrappedLineFormatter(&Indenter, &Whitespaces, Style,
Tokens.getKeywords(), Env.getSourceManager(),
Status)
.format(AnnotatedLines, /*DryRun=*/false,
/*AdditionalIndent=*/0,
/*FixBadIndentation=*/false,
/*FirstStartColumn=*/Env.getFirstStartColumn(),
/*NextStartColumn=*/Env.getNextStartColumn(),
/*LastStartColumn=*/Env.getLastStartColumn());
for (const auto &R : Whitespaces.generateReplacements())
if (Result.add(R))
return std::make_pair(Result, 0);
return std::make_pair(Result, Penalty);
}
private:
static bool inputUsesCRLF(StringRef Text) {
return Text.count('\r') * 2 > Text.count('\n');
}
bool
hasCpp03IncompatibleFormat(const SmallVectorImpl<AnnotatedLine *> &Lines) {
for (const AnnotatedLine *Line : Lines) {
if (hasCpp03IncompatibleFormat(Line->Children))
return true;
for (FormatToken *Tok = Line->First->Next; Tok; Tok = Tok->Next) {
if (Tok->WhitespaceRange.getBegin() == Tok->WhitespaceRange.getEnd()) {
if (Tok->is(tok::coloncolon) && Tok->Previous->is(TT_TemplateOpener))
return true;
if (Tok->is(TT_TemplateCloser) &&
Tok->Previous->is(TT_TemplateCloser))
return true;
}
}
}
return false;
}
int countVariableAlignments(const SmallVectorImpl<AnnotatedLine *> &Lines) {
int AlignmentDiff = 0;
for (const AnnotatedLine *Line : Lines) {
AlignmentDiff += countVariableAlignments(Line->Children);
for (FormatToken *Tok = Line->First; Tok && Tok->Next; Tok = Tok->Next) {
if (!Tok->is(TT_PointerOrReference))
continue;
bool SpaceBefore =
Tok->WhitespaceRange.getBegin() != Tok->WhitespaceRange.getEnd();
bool SpaceAfter = Tok->Next->WhitespaceRange.getBegin() !=
Tok->Next->WhitespaceRange.getEnd();
if (SpaceBefore && !SpaceAfter)
++AlignmentDiff;
if (!SpaceBefore && SpaceAfter)
--AlignmentDiff;
}
}
return AlignmentDiff;
}
void
deriveLocalStyle(const SmallVectorImpl<AnnotatedLine *> &AnnotatedLines) {
bool HasBinPackedFunction = false;
bool HasOnePerLineFunction = false;
for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
if (!AnnotatedLines[i]->First->Next)
continue;
FormatToken *Tok = AnnotatedLines[i]->First->Next;
while (Tok->Next) {
if (Tok->PackingKind == PPK_BinPacked)
HasBinPackedFunction = true;
if (Tok->PackingKind == PPK_OnePerLine)
HasOnePerLineFunction = true;
Tok = Tok->Next;
}
}
if (Style.DerivePointerAlignment)
Style.PointerAlignment = countVariableAlignments(AnnotatedLines) <= 0
? FormatStyle::PAS_Left
: FormatStyle::PAS_Right;
if (Style.Standard == FormatStyle::LS_Auto)
Style.Standard = hasCpp03IncompatibleFormat(AnnotatedLines)
? FormatStyle::LS_Cpp11
: FormatStyle::LS_Cpp03;
BinPackInconclusiveFunctions =
HasBinPackedFunction || !HasOnePerLineFunction;
}
bool BinPackInconclusiveFunctions;
FormattingAttemptStatus *Status;
};
// This class clean up the erroneous/redundant code around the given ranges in
// file.
class Cleaner : public TokenAnalyzer {
public:
Cleaner(const Environment &Env, const FormatStyle &Style)
: TokenAnalyzer(Env, Style),
DeletedTokens(FormatTokenLess(Env.getSourceManager())) {}
// FIXME: eliminate unused parameters.
std::pair<tooling::Replacements, unsigned>
analyze(TokenAnnotator &Annotator,
SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
FormatTokenLexer &Tokens) override {
// FIXME: in the current implementation the granularity of affected range
// is an annotated line. However, this is not sufficient. Furthermore,
// redundant code introduced by replacements does not necessarily
// intercept with ranges of replacements that result in the redundancy.
// To determine if some redundant code is actually introduced by
// replacements(e.g. deletions), we need to come up with a more
// sophisticated way of computing affected ranges.
AffectedRangeMgr.computeAffectedLines(AnnotatedLines.begin(),
AnnotatedLines.end());
checkEmptyNamespace(AnnotatedLines);
for (auto &Line : AnnotatedLines) {
if (Line->Affected) {
cleanupRight(Line->First, tok::comma, tok::comma);
cleanupRight(Line->First, TT_CtorInitializerColon, tok::comma);
cleanupRight(Line->First, tok::l_paren, tok::comma);
cleanupLeft(Line->First, tok::comma, tok::r_paren);
cleanupLeft(Line->First, TT_CtorInitializerComma, tok::l_brace);
cleanupLeft(Line->First, TT_CtorInitializerColon, tok::l_brace);
cleanupLeft(Line->First, TT_CtorInitializerColon, tok::equal);
}
}
return {generateFixes(), 0};
}
private:
bool containsOnlyComments(const AnnotatedLine &Line) {
for (FormatToken *Tok = Line.First; Tok != nullptr; Tok = Tok->Next) {
if (Tok->isNot(tok::comment))
return false;
}
return true;
}
// Iterate through all lines and remove any empty (nested) namespaces.
void checkEmptyNamespace(SmallVectorImpl<AnnotatedLine *> &AnnotatedLines) {
std::set<unsigned> DeletedLines;
for (unsigned i = 0, e = AnnotatedLines.size(); i != e; ++i) {
auto &Line = *AnnotatedLines[i];
if (Line.startsWith(tok::kw_namespace) ||
Line.startsWith(tok::kw_inline, tok::kw_namespace)) {
checkEmptyNamespace(AnnotatedLines, i, i, DeletedLines);
}
}
for (auto Line : DeletedLines) {
FormatToken *Tok = AnnotatedLines[Line]->First;
while (Tok) {
deleteToken(Tok);
Tok = Tok->Next;
}
}
}
// The function checks if the namespace, which starts from \p CurrentLine, and
// its nested namespaces are empty and delete them if they are empty. It also
// sets \p NewLine to the last line checked.
// Returns true if the current namespace is empty.
bool checkEmptyNamespace(SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
unsigned CurrentLine, unsigned &NewLine,
std::set<unsigned> &DeletedLines) {
unsigned InitLine = CurrentLine, End = AnnotatedLines.size();
if (Style.BraceWrapping.AfterNamespace) {
// If the left brace is in a new line, we should consume it first so that
// it does not make the namespace non-empty.
// FIXME: error handling if there is no left brace.
if (!AnnotatedLines[++CurrentLine]->startsWith(tok::l_brace)) {
NewLine = CurrentLine;
return false;
}
} else if (!AnnotatedLines[CurrentLine]->endsWith(tok::l_brace)) {
return false;
}
while (++CurrentLine < End) {
if (AnnotatedLines[CurrentLine]->startsWith(tok::r_brace))
break;
if (AnnotatedLines[CurrentLine]->startsWith(tok::kw_namespace) ||
AnnotatedLines[CurrentLine]->startsWith(tok::kw_inline,
tok::kw_namespace)) {
if (!checkEmptyNamespace(AnnotatedLines, CurrentLine, NewLine,
DeletedLines))
return false;
CurrentLine = NewLine;
continue;
}
if (containsOnlyComments(*AnnotatedLines[CurrentLine]))
continue;
// If there is anything other than comments or nested namespaces in the
// current namespace, the namespace cannot be empty.
NewLine = CurrentLine;
return false;
}
NewLine = CurrentLine;
if (CurrentLine >= End)
return false;
// Check if the empty namespace is actually affected by changed ranges.
if (!AffectedRangeMgr.affectsCharSourceRange(CharSourceRange::getCharRange(
AnnotatedLines[InitLine]->First->Tok.getLocation(),
AnnotatedLines[CurrentLine]->Last->Tok.getEndLoc())))
return false;
for (unsigned i = InitLine; i <= CurrentLine; ++i) {
DeletedLines.insert(i);
}
return true;
}
// Checks pairs {start, start->next},..., {end->previous, end} and deletes one
// of the token in the pair if the left token has \p LK token kind and the
// right token has \p RK token kind. If \p DeleteLeft is true, the left token
// is deleted on match; otherwise, the right token is deleted.
template <typename LeftKind, typename RightKind>
void cleanupPair(FormatToken *Start, LeftKind LK, RightKind RK,
bool DeleteLeft) {
auto NextNotDeleted = [this](const FormatToken &Tok) -> FormatToken * {
for (auto *Res = Tok.Next; Res; Res = Res->Next)
if (!Res->is(tok::comment) &&
DeletedTokens.find(Res) == DeletedTokens.end())
return Res;
return nullptr;
};
for (auto *Left = Start; Left;) {
auto *Right = NextNotDeleted(*Left);
if (!Right)
break;
if (Left->is(LK) && Right->is(RK)) {
deleteToken(DeleteLeft ? Left : Right);
for (auto *Tok = Left->Next; Tok && Tok != Right; Tok = Tok->Next)
deleteToken(Tok);
// If the right token is deleted, we should keep the left token
// unchanged and pair it with the new right token.
if (!DeleteLeft)
continue;
}
Left = Right;
}
}
template <typename LeftKind, typename RightKind>
void cleanupLeft(FormatToken *Start, LeftKind LK, RightKind RK) {
cleanupPair(Start, LK, RK, /*DeleteLeft=*/true);
}
template <typename LeftKind, typename RightKind>
void cleanupRight(FormatToken *Start, LeftKind LK, RightKind RK) {
cleanupPair(Start, LK, RK, /*DeleteLeft=*/false);
}
// Delete the given token.
inline void deleteToken(FormatToken *Tok) {
if (Tok)
DeletedTokens.insert(Tok);
}
tooling::Replacements generateFixes() {
tooling::Replacements Fixes;
std::vector<FormatToken *> Tokens;
std::copy(DeletedTokens.begin(), DeletedTokens.end(),
std::back_inserter(Tokens));
// Merge multiple continuous token deletions into one big deletion so that
// the number of replacements can be reduced. This makes computing affected
// ranges more efficient when we run reformat on the changed code.
unsigned Idx = 0;
while (Idx < Tokens.size()) {
unsigned St = Idx, End = Idx;
while ((End + 1) < Tokens.size() &&
Tokens[End]->Next == Tokens[End + 1]) {
End++;
}
auto SR = CharSourceRange::getCharRange(Tokens[St]->Tok.getLocation(),
Tokens[End]->Tok.getEndLoc());
auto Err =
Fixes.add(tooling::Replacement(Env.getSourceManager(), SR, ""));
// FIXME: better error handling. for now just print error message and skip
// for the release version.
if (Err) {
llvm::errs() << llvm::toString(std::move(Err)) << "\n";
assert(false && "Fixes must not conflict!");
}
Idx = End + 1;
}
return Fixes;
}
// Class for less-than inequality comparason for the set `RedundantTokens`.
// We store tokens in the order they appear in the translation unit so that
// we do not need to sort them in `generateFixes()`.
struct FormatTokenLess {
FormatTokenLess(const SourceManager &SM) : SM(SM) {}
bool operator()(const FormatToken *LHS, const FormatToken *RHS) const {
return SM.isBeforeInTranslationUnit(LHS->Tok.getLocation(),
RHS->Tok.getLocation());
}
const SourceManager &SM;
};
// Tokens to be deleted.
std::set<FormatToken *, FormatTokenLess> DeletedTokens;
};
class ObjCHeaderStyleGuesser : public TokenAnalyzer {
public:
ObjCHeaderStyleGuesser(const Environment &Env, const FormatStyle &Style)
: TokenAnalyzer(Env, Style), IsObjC(false) {}
std::pair<tooling::Replacements, unsigned>
analyze(TokenAnnotator &Annotator,
SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
FormatTokenLexer &Tokens) override {
assert(Style.Language == FormatStyle::LK_Cpp);
IsObjC = guessIsObjC(AnnotatedLines, Tokens.getKeywords());
tooling::Replacements Result;
return {Result, 0};
}
bool isObjC() { return IsObjC; }
private:
static bool guessIsObjC(const SmallVectorImpl<AnnotatedLine *> &AnnotatedLines,
const AdditionalKeywords &Keywords) {
// Keep this array sorted, since we are binary searching over it.
static constexpr llvm::StringLiteral FoundationIdentifiers[] = {
"CGFloat",
"NSAffineTransform",
"NSArray",
"NSAttributedString",
"NSBundle",
"NSCache",
"NSCalendar",
"NSCharacterSet",
"NSCountedSet",
"NSData",
"NSDataDetector",
"NSDecimal",
"NSDecimalNumber",
"NSDictionary",
"NSEdgeInsets",
"NSHashTable",
"NSIndexPath",
"NSIndexSet",
"NSInteger",
"NSLocale",
"NSMapTable",
"NSMutableArray",
"NSMutableAttributedString",
"NSMutableCharacterSet",
"NSMutableData",
"NSMutableDictionary",
"NSMutableIndexSet",
"NSMutableOrderedSet",
"NSMutableSet",
"NSMutableString",
"NSNumber",
"NSNumberFormatter",
"NSObject",
"NSOrderedSet",
"NSPoint",
"NSPointerArray",
"NSRange",
"NSRect",
"NSRegularExpression",
"NSSet",
"NSSize",
"NSString",
"NSTimeZone",
"NSUInteger",
"NSURL",
"NSURLComponents",
"NSURLQueryItem",
"NSUUID",
"NSValue",
};
for (auto &Line : AnnotatedLines) {
for (FormatToken *FormatTok = Line->First; FormatTok;
FormatTok = FormatTok->Next) {
if ((FormatTok->Previous && FormatTok->Previous->is(tok::at) &&
(FormatTok->isObjCAtKeyword(tok::objc_interface) ||
FormatTok->isObjCAtKeyword(tok::objc_implementation) ||
FormatTok->isObjCAtKeyword(tok::objc_protocol) ||
FormatTok->isObjCAtKeyword(tok::objc_end) ||
FormatTok->isOneOf(tok::numeric_constant, tok::l_square,
tok::l_brace))) ||
(FormatTok->Tok.isAnyIdentifier() &&
std::binary_search(std::begin(FoundationIdentifiers),
std::end(FoundationIdentifiers),
FormatTok->TokenText)) ||
FormatTok->is(TT_ObjCStringLiteral) ||
FormatTok->isOneOf(Keywords.kw_NS_ENUM, Keywords.kw_NS_OPTIONS,
TT_ObjCBlockLBrace, TT_ObjCBlockLParen,
TT_ObjCDecl, TT_ObjCForIn, TT_ObjCMethodExpr,
TT_ObjCMethodSpecifier, TT_ObjCProperty)) {
return true;
}
}
}
return false;
}
bool IsObjC;
};
struct IncludeDirective {
StringRef Filename;
StringRef Text;
unsigned Offset;
int Category;
};
} // end anonymous namespace
// Determines whether 'Ranges' intersects with ('Start', 'End').
static bool affectsRange(ArrayRef<tooling::Range> Ranges, unsigned Start,
unsigned End) {
for (auto Range : Ranges) {
if (Range.getOffset() < End &&
Range.getOffset() + Range.getLength() > Start)
return true;
}
return false;
}
// Returns a pair (Index, OffsetToEOL) describing the position of the cursor
// before sorting/deduplicating. Index is the index of the include under the
// cursor in the original set of includes. If this include has duplicates, it is
// the index of the first of the duplicates as the others are going to be
// removed. OffsetToEOL describes the cursor's position relative to the end of
// its current line.
// If `Cursor` is not on any #include, `Index` will be UINT_MAX.
static std::pair<unsigned, unsigned>
FindCursorIndex(const SmallVectorImpl<IncludeDirective> &Includes,
const SmallVectorImpl<unsigned> &Indices, unsigned Cursor) {
unsigned CursorIndex = UINT_MAX;
unsigned OffsetToEOL = 0;
for (int i = 0, e = Includes.size(); i != e; ++i) {
unsigned Start = Includes[Indices[i]].Offset;
unsigned End = Start + Includes[Indices[i]].Text.size();
if (!(Cursor >= Start && Cursor < End))
continue;
CursorIndex = Indices[i];
OffsetToEOL = End - Cursor;
// Put the cursor on the only remaining #include among the duplicate
// #includes.
while (--i >= 0 && Includes[CursorIndex].Text == Includes[Indices[i]].Text)
CursorIndex = i;
break;
}
return std::make_pair(CursorIndex, OffsetToEOL);
}
// Sorts and deduplicate a block of includes given by 'Includes' alphabetically
// adding the necessary replacement to 'Replaces'. 'Includes' must be in strict
// source order.
// #include directives with the same text will be deduplicated, and only the
// first #include in the duplicate #includes remains. If the `Cursor` is
// provided and put on a deleted #include, it will be moved to the remaining
// #include in the duplicate #includes.
static void sortCppIncludes(const FormatStyle &Style,
const SmallVectorImpl<IncludeDirective> &Includes,
ArrayRef<tooling::Range> Ranges, StringRef FileName,
tooling::Replacements &Replaces, unsigned *Cursor) {
unsigned IncludesBeginOffset = Includes.front().Offset;
unsigned IncludesEndOffset =
Includes.back().Offset + Includes.back().Text.size();
unsigned IncludesBlockSize = IncludesEndOffset - IncludesBeginOffset;
if (!affectsRange(Ranges, IncludesBeginOffset, IncludesEndOffset))
return;
SmallVector<unsigned, 16> Indices;
for (unsigned i = 0, e = Includes.size(); i != e; ++i)
Indices.push_back(i);
std::stable_sort(
Indices.begin(), Indices.end(), [&](unsigned LHSI, unsigned RHSI) {
return std::tie(Includes[LHSI].Category, Includes[LHSI].Filename) <
std::tie(Includes[RHSI].Category, Includes[RHSI].Filename);
});
// The index of the include on which the cursor will be put after
// sorting/deduplicating.
unsigned CursorIndex;
// The offset from cursor to the end of line.
unsigned CursorToEOLOffset;
if (Cursor)
std::tie(CursorIndex, CursorToEOLOffset) =
FindCursorIndex(Includes, Indices, *Cursor);
// Deduplicate #includes.
Indices.erase(std::unique(Indices.begin(), Indices.end(),
[&](unsigned LHSI, unsigned RHSI) {
return Includes[LHSI].Text == Includes[RHSI].Text;
}),
Indices.end());
int CurrentCategory = Includes.front().Category;
// If the #includes are out of order, we generate a single replacement fixing
// the entire block. Otherwise, no replacement is generated.
if (Indices.size() == Includes.size() &&
std::is_sorted(Indices.begin(), Indices.end()) &&
Style.IncludeBlocks == FormatStyle::IBS_Preserve)
return;
std::string result;
for (unsigned Index : Indices) {
if (!result.empty()) {
result += "\n";
if (Style.IncludeBlocks == FormatStyle::IBS_Regroup &&
CurrentCategory != Includes[Index].Category)
result += "\n";
}
result += Includes[Index].Text;
if (Cursor && CursorIndex == Index)
*Cursor = IncludesBeginOffset + result.size() - CursorToEOLOffset;
CurrentCategory = Includes[Index].Category;
}
auto Err = Replaces.add(tooling::Replacement(
FileName, Includes.front().Offset, IncludesBlockSize, result));
// FIXME: better error handling. For now, just skip the replacement for the
// release version.
if (Err) {
llvm::errs() << llvm::toString(std::move(Err)) << "\n";
assert(false);
}
}
namespace {
// This class manages priorities of #include categories and calculates
// priorities for headers.
class IncludeCategoryManager {
public:
IncludeCategoryManager(const FormatStyle &Style, StringRef FileName)
: Style(Style), FileName(FileName) {
FileStem = llvm::sys::path::stem(FileName);
for (const auto &Category : Style.IncludeCategories)
CategoryRegexs.emplace_back(Category.Regex, llvm::Regex::IgnoreCase);
IsMainFile = FileName.endswith(".c") || FileName.endswith(".cc") ||
FileName.endswith(".cpp") || FileName.endswith(".c++") ||
FileName.endswith(".cxx") || FileName.endswith(".m") ||
FileName.endswith(".mm");
}
// Returns the priority of the category which \p IncludeName belongs to.
// If \p CheckMainHeader is true and \p IncludeName is a main header, returns
// 0. Otherwise, returns the priority of the matching category or INT_MAX.
int getIncludePriority(StringRef IncludeName, bool CheckMainHeader) {
int Ret = INT_MAX;
for (unsigned i = 0, e = CategoryRegexs.size(); i != e; ++i)
if (CategoryRegexs[i].match(IncludeName)) {
Ret = Style.IncludeCategories[i].Priority;
break;
}
if (CheckMainHeader && IsMainFile && Ret > 0 && isMainHeader(IncludeName))
Ret = 0;
return Ret;
}
private:
bool isMainHeader(StringRef IncludeName) const {
if (!IncludeName.startswith("\""))
return false;
StringRef HeaderStem =
llvm::sys::path::stem(IncludeName.drop_front(1).drop_back(1));
if (FileStem.startswith(HeaderStem) ||
FileStem.startswith_lower(HeaderStem)) {
llvm::Regex MainIncludeRegex(
(HeaderStem + Style.IncludeIsMainRegex).str(),
llvm::Regex::IgnoreCase);
if (MainIncludeRegex.match(FileStem))
return true;
}
return false;
}
const FormatStyle &Style;
bool IsMainFile;
StringRef FileName;
StringRef FileStem;
SmallVector<llvm::Regex, 4> CategoryRegexs;
};
const char IncludeRegexPattern[] =
R"(^[\t\ ]*#[\t\ ]*(import|include)[^"<]*(["<][^">]*[">]))";
} // anonymous namespace
tooling::Replacements sortCppIncludes(const FormatStyle &Style, StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName,
tooling::Replacements &Replaces,
unsigned *Cursor) {
unsigned Prev = 0;
unsigned SearchFrom = 0;
llvm::Regex IncludeRegex(IncludeRegexPattern);
SmallVector<StringRef, 4> Matches;
SmallVector<IncludeDirective, 16> IncludesInBlock;
// In compiled files, consider the first #include to be the main #include of
// the file if it is not a system #include. This ensures that the header
// doesn't have hidden dependencies
// (http://llvm.org/docs/CodingStandards.html#include-style).
//
// FIXME: Do some sanity checking, e.g. edit distance of the base name, to fix
// cases where the first #include is unlikely to be the main header.
IncludeCategoryManager Categories(Style, FileName);
bool FirstIncludeBlock = true;
bool MainIncludeFound = false;
bool FormattingOff = false;
for (;;) {
auto Pos = Code.find('\n', SearchFrom);
StringRef Line =
Code.substr(Prev, (Pos != StringRef::npos ? Pos : Code.size()) - Prev);
StringRef Trimmed = Line.trim();
if (Trimmed == "// clang-format off")
FormattingOff = true;
else if (Trimmed == "// clang-format on")
FormattingOff = false;
const bool EmptyLineSkipped =
Trimmed.empty() && (Style.IncludeBlocks == FormatStyle::IBS_Merge ||
Style.IncludeBlocks == FormatStyle::IBS_Regroup);
if (!FormattingOff && !Line.endswith("\\")) {
if (IncludeRegex.match(Line, &Matches)) {
StringRef IncludeName = Matches[2];
int Category = Categories.getIncludePriority(
IncludeName,
/*CheckMainHeader=*/!MainIncludeFound && FirstIncludeBlock);
if (Category == 0)
MainIncludeFound = true;
IncludesInBlock.push_back({IncludeName, Line, Prev, Category});
} else if (!IncludesInBlock.empty() && !EmptyLineSkipped) {
sortCppIncludes(Style, IncludesInBlock, Ranges, FileName, Replaces,
Cursor);
IncludesInBlock.clear();
FirstIncludeBlock = false;
}
Prev = Pos + 1;
}
if (Pos == StringRef::npos || Pos + 1 == Code.size())
break;
SearchFrom = Pos + 1;
}
if (!IncludesInBlock.empty())
sortCppIncludes(Style, IncludesInBlock, Ranges, FileName, Replaces, Cursor);
return Replaces;
}
bool isMpegTS(StringRef Code) {
// MPEG transport streams use the ".ts" file extension. clang-format should
// not attempt to format those. MPEG TS' frame format starts with 0x47 every
// 189 bytes - detect that and return.
return Code.size() > 188 && Code[0] == 0x47 && Code[188] == 0x47;
}
bool isLikelyXml(StringRef Code) { return Code.ltrim().startswith("<"); }
tooling::Replacements sortIncludes(const FormatStyle &Style, StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName, unsigned *Cursor) {
tooling::Replacements Replaces;
if (!Style.SortIncludes)
return Replaces;
if (isLikelyXml(Code))
return Replaces;
if (Style.Language == FormatStyle::LanguageKind::LK_JavaScript &&
isMpegTS(Code))
return Replaces;
if (Style.Language == FormatStyle::LanguageKind::LK_JavaScript)
return sortJavaScriptImports(Style, Code, Ranges, FileName);
sortCppIncludes(Style, Code, Ranges, FileName, Replaces, Cursor);
return Replaces;
}
template <typename T>
static llvm::Expected<tooling::Replacements>
processReplacements(T ProcessFunc, StringRef Code,
const tooling::Replacements &Replaces,
const FormatStyle &Style) {
if (Replaces.empty())
return tooling::Replacements();
auto NewCode = applyAllReplacements(Code, Replaces);
if (!NewCode)
return NewCode.takeError();
std::vector<tooling::Range> ChangedRanges = Replaces.getAffectedRanges();
StringRef FileName = Replaces.begin()->getFilePath();
tooling::Replacements FormatReplaces =
ProcessFunc(Style, *NewCode, ChangedRanges, FileName);
return Replaces.merge(FormatReplaces);
}
llvm::Expected<tooling::Replacements>
formatReplacements(StringRef Code, const tooling::Replacements &Replaces,
const FormatStyle &Style) {
// We need to use lambda function here since there are two versions of
// `sortIncludes`.
auto SortIncludes = [](const FormatStyle &Style, StringRef Code,
std::vector<tooling::Range> Ranges,
StringRef FileName) -> tooling::Replacements {
return sortIncludes(Style, Code, Ranges, FileName);
};
auto SortedReplaces =
processReplacements(SortIncludes, Code, Replaces, Style);
if (!SortedReplaces)
return SortedReplaces.takeError();
// We need to use lambda function here since there are two versions of
// `reformat`.
auto Reformat = [](const FormatStyle &Style, StringRef Code,
std::vector<tooling::Range> Ranges,
StringRef FileName) -> tooling::Replacements {
return reformat(Style, Code, Ranges, FileName);
};
return processReplacements(Reformat, Code, *SortedReplaces, Style);
}
namespace {
inline bool isHeaderInsertion(const tooling::Replacement &Replace) {
return Replace.getOffset() == UINT_MAX && Replace.getLength() == 0 &&
llvm::Regex(IncludeRegexPattern).match(Replace.getReplacementText());
}
inline bool isHeaderDeletion(const tooling::Replacement &Replace) {
return Replace.getOffset() == UINT_MAX && Replace.getLength() == 1;
}
// Returns the offset after skipping a sequence of tokens, matched by \p
// GetOffsetAfterSequence, from the start of the code.
// \p GetOffsetAfterSequence should be a function that matches a sequence of
// tokens and returns an offset after the sequence.
unsigned getOffsetAfterTokenSequence(
StringRef FileName, StringRef Code, const FormatStyle &Style,
llvm::function_ref<unsigned(const SourceManager &, Lexer &, Token &)>
GetOffsetAfterSequence) {
std::unique_ptr<Environment> Env =
Environment::CreateVirtualEnvironment(Code, FileName, /*Ranges=*/{});
const SourceManager &SourceMgr = Env->getSourceManager();
Lexer Lex(Env->getFileID(), SourceMgr.getBuffer(Env->getFileID()), SourceMgr,
getFormattingLangOpts(Style));
Token Tok;
// Get the first token.
Lex.LexFromRawLexer(Tok);
return GetOffsetAfterSequence(SourceMgr, Lex, Tok);
}
// Check if a sequence of tokens is like "#<Name> <raw_identifier>". If it is,
// \p Tok will be the token after this directive; otherwise, it can be any token
// after the given \p Tok (including \p Tok).
bool checkAndConsumeDirectiveWithName(Lexer &Lex, StringRef Name, Token &Tok) {
bool Matched = Tok.is(tok::hash) && !Lex.LexFromRawLexer(Tok) &&
Tok.is(tok::raw_identifier) &&
Tok.getRawIdentifier() == Name && !Lex.LexFromRawLexer(Tok) &&
Tok.is(tok::raw_identifier);
if (Matched)
Lex.LexFromRawLexer(Tok);
return Matched;
}
void skipComments(Lexer &Lex, Token &Tok) {
while (Tok.is(tok::comment))
if (Lex.LexFromRawLexer(Tok))
return;
}
// Returns the offset after header guard directives and any comments
// before/after header guards. If no header guard presents in the code, this
// will returns the offset after skipping all comments from the start of the
// code.
unsigned getOffsetAfterHeaderGuardsAndComments(StringRef FileName,
StringRef Code,
const FormatStyle &Style) {
return getOffsetAfterTokenSequence(
FileName, Code, Style,
[](const SourceManager &SM, Lexer &Lex, Token Tok) {
skipComments(Lex, Tok);
unsigned InitialOffset = SM.getFileOffset(Tok.getLocation());
if (checkAndConsumeDirectiveWithName(Lex, "ifndef", Tok)) {
skipComments(Lex, Tok);
if (checkAndConsumeDirectiveWithName(Lex, "define", Tok))
return SM.getFileOffset(Tok.getLocation());
}
return InitialOffset;
});
}
// Check if a sequence of tokens is like
// "#include ("header.h" | <header.h>)".
// If it is, \p Tok will be the token after this directive; otherwise, it can be
// any token after the given \p Tok (including \p Tok).
bool checkAndConsumeInclusiveDirective(Lexer &Lex, Token &Tok) {
auto Matched = [&]() {
Lex.LexFromRawLexer(Tok);
return true;
};
if (Tok.is(tok::hash) && !Lex.LexFromRawLexer(Tok) &&
Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == "include") {
if (Lex.LexFromRawLexer(Tok))
return false;
if (Tok.is(tok::string_literal))
return Matched();
if (Tok.is(tok::less)) {
while (!Lex.LexFromRawLexer(Tok) && Tok.isNot(tok::greater)) {
}
if (Tok.is(tok::greater))
return Matched();
}
}
return false;
}
// Returns the offset of the last #include directive after which a new
// #include can be inserted. This ignores #include's after the #include block(s)
// in the beginning of a file to avoid inserting headers into code sections
// where new #include's should not be added by default.
// These code sections include:
// - raw string literals (containing #include).
// - #if blocks.
// - Special #include's among declarations (e.g. functions).
//
// If no #include after which a new #include can be inserted, this returns the
// offset after skipping all comments from the start of the code.
// Inserting after an #include is not allowed if it comes after code that is not
// #include (e.g. pre-processing directive that is not #include, declarations).
unsigned getMaxHeaderInsertionOffset(StringRef FileName, StringRef Code,
const FormatStyle &Style) {
return getOffsetAfterTokenSequence(
FileName, Code, Style,
[](const SourceManager &SM, Lexer &Lex, Token Tok) {
skipComments(Lex, Tok);
unsigned MaxOffset = SM.getFileOffset(Tok.getLocation());
while (checkAndConsumeInclusiveDirective(Lex, Tok))
MaxOffset = SM.getFileOffset(Tok.getLocation());
return MaxOffset;
});
}
bool isDeletedHeader(llvm::StringRef HeaderName,
const std::set<llvm::StringRef> &HeadersToDelete) {
return HeadersToDelete.count(HeaderName) ||
HeadersToDelete.count(HeaderName.trim("\"<>"));
}
// FIXME: insert empty lines between newly created blocks.
tooling::Replacements
fixCppIncludeInsertions(StringRef Code, const tooling::Replacements &Replaces,
const FormatStyle &Style) {
if (!Style.isCpp())
return Replaces;
tooling::Replacements HeaderInsertions;
std::set<llvm::StringRef> HeadersToDelete;
tooling::Replacements Result;
for (const auto &R : Replaces) {
if (isHeaderInsertion(R)) {
// Replacements from \p Replaces must be conflict-free already, so we can
// simply consume the error.
llvm::consumeError(HeaderInsertions.add(R));
} else if (isHeaderDeletion(R)) {
HeadersToDelete.insert(R.getReplacementText());
} else if (R.getOffset() == UINT_MAX) {
llvm::errs() << "Insertions other than header #include insertion are "
"not supported! "
<< R.getReplacementText() << "\n";
} else {
llvm::consumeError(Result.add(R));
}
}
if (HeaderInsertions.empty() && HeadersToDelete.empty())
return Replaces;
llvm::Regex IncludeRegex(IncludeRegexPattern);
llvm::Regex DefineRegex(R"(^[\t\ ]*#[\t\ ]*define[\t\ ]*[^\\]*$)");
SmallVector<StringRef, 4> Matches;
StringRef FileName = Replaces.begin()->getFilePath();
IncludeCategoryManager Categories(Style, FileName);
// Record the offset of the end of the last include in each category.
std::map<int, int> CategoryEndOffsets;
// All possible priorities.
// Add 0 for main header and INT_MAX for headers that are not in any category.
std::set<int> Priorities = {0, INT_MAX};
for (const auto &Category : Style.IncludeCategories)
Priorities.insert(Category.Priority);
int FirstIncludeOffset = -1;
// All new headers should be inserted after this offset.
unsigned MinInsertOffset =
getOffsetAfterHeaderGuardsAndComments(FileName, Code, Style);
StringRef TrimmedCode = Code.drop_front(MinInsertOffset);
// Max insertion offset in the original code.
unsigned MaxInsertOffset =
MinInsertOffset +
getMaxHeaderInsertionOffset(FileName, TrimmedCode, Style);
SmallVector<StringRef, 32> Lines;
TrimmedCode.split(Lines, '\n');
unsigned Offset = MinInsertOffset;
unsigned NextLineOffset;
std::set<StringRef> ExistingIncludes;
for (auto Line : Lines) {
NextLineOffset = std::min(Code.size(), Offset + Line.size() + 1);
if (IncludeRegex.match(Line, &Matches)) {
// The header name with quotes or angle brackets.
StringRef IncludeName = Matches[2];
ExistingIncludes.insert(IncludeName);
// Only record the offset of current #include if we can insert after it.
if (Offset <= MaxInsertOffset) {
int Category = Categories.getIncludePriority(
IncludeName, /*CheckMainHeader=*/FirstIncludeOffset < 0);
CategoryEndOffsets[Category] = NextLineOffset;
if (FirstIncludeOffset < 0)
FirstIncludeOffset = Offset;
}
if (isDeletedHeader(IncludeName, HeadersToDelete)) {
// If this is the last line without trailing newline, we need to make
// sure we don't delete across the file boundary.
unsigned Length = std::min(Line.size() + 1, Code.size() - Offset);
llvm::Error Err =
Result.add(tooling::Replacement(FileName, Offset, Length, ""));
if (Err) {
// Ignore the deletion on conflict.
llvm::errs() << "Failed to add header deletion replacement for "
<< IncludeName << ": " << llvm::toString(std::move(Err))
<< "\n";
}
}
}
Offset = NextLineOffset;
}
// Populate CategoryEndOfssets:
// - Ensure that CategoryEndOffset[Highest] is always populated.
// - If CategoryEndOffset[Priority] isn't set, use the next higher value that
// is set, up to CategoryEndOffset[Highest].
auto Highest = Priorities.begin();
if (CategoryEndOffsets.find(*Highest) == CategoryEndOffsets.end()) {
if (FirstIncludeOffset >= 0)
CategoryEndOffsets[*Highest] = FirstIncludeOffset;
else
CategoryEndOffsets[*Highest] = MinInsertOffset;
}
// By this point, CategoryEndOffset[Highest] is always set appropriately:
// - to an appropriate location before/after existing #includes, or
// - to right after the header guard, or
// - to the beginning of the file.
for (auto I = ++Priorities.begin(), E = Priorities.end(); I != E; ++I)
if (CategoryEndOffsets.find(*I) == CategoryEndOffsets.end())
CategoryEndOffsets[*I] = CategoryEndOffsets[*std::prev(I)];
bool NeedNewLineAtEnd = !Code.empty() && Code.back() != '\n';
for (const auto &R : HeaderInsertions) {
auto IncludeDirective = R.getReplacementText();
bool Matched = IncludeRegex.match(IncludeDirective, &Matches);
assert(Matched && "Header insertion replacement must have replacement text "
"'#include ...'");
(void)Matched;
auto IncludeName = Matches[2];
if (ExistingIncludes.find(IncludeName) != ExistingIncludes.end()) {
DEBUG(llvm::dbgs() << "Skip adding existing include : " << IncludeName
<< "\n");
continue;
}
int Category =
Categories.getIncludePriority(IncludeName, /*CheckMainHeader=*/true);
Offset = CategoryEndOffsets[Category];
std::string NewInclude = !IncludeDirective.endswith("\n")
? (IncludeDirective + "\n").str()
: IncludeDirective.str();
// When inserting headers at end of the code, also append '\n' to the code
// if it does not end with '\n'.
if (NeedNewLineAtEnd && Offset == Code.size()) {
NewInclude = "\n" + NewInclude;
NeedNewLineAtEnd = false;
}
auto NewReplace = tooling::Replacement(FileName, Offset, 0, NewInclude);
auto Err = Result.add(NewReplace);
if (Err) {
llvm::consumeError(std::move(Err));
unsigned NewOffset = Result.getShiftedCodePosition(Offset);
NewReplace = tooling::Replacement(FileName, NewOffset, 0, NewInclude);
Result = Result.merge(tooling::Replacements(NewReplace));
}
}
return Result;
}
} // anonymous namespace
llvm::Expected<tooling::Replacements>
cleanupAroundReplacements(StringRef Code, const tooling::Replacements &Replaces,
const FormatStyle &Style) {
// We need to use lambda function here since there are two versions of
// `cleanup`.
auto Cleanup = [](const FormatStyle &Style, StringRef Code,
std::vector<tooling::Range> Ranges,
StringRef FileName) -> tooling::Replacements {
return cleanup(Style, Code, Ranges, FileName);
};
// Make header insertion replacements insert new headers into correct blocks.
tooling::Replacements NewReplaces =
fixCppIncludeInsertions(Code, Replaces, Style);
return processReplacements(Cleanup, Code, NewReplaces, Style);
}
namespace internal {
std::pair<tooling::Replacements, unsigned>
reformat(const FormatStyle &Style, StringRef Code,
ArrayRef<tooling::Range> Ranges, unsigned FirstStartColumn,
unsigned NextStartColumn, unsigned LastStartColumn, StringRef FileName,
FormattingAttemptStatus *Status) {
FormatStyle Expanded = expandPresets(Style);
if (Expanded.DisableFormat)
return {tooling::Replacements(), 0};
if (isLikelyXml(Code))
return {tooling::Replacements(), 0};
if (Expanded.Language == FormatStyle::LK_JavaScript && isMpegTS(Code))
return {tooling::Replacements(), 0};
typedef std::function<std::pair<tooling::Replacements, unsigned>(
const Environment &)>
AnalyzerPass;
SmallVector<AnalyzerPass, 4> Passes;
if (Style.Language == FormatStyle::LK_Cpp) {
if (Style.FixNamespaceComments)
Passes.emplace_back([&](const Environment &Env) {
return NamespaceEndCommentsFixer(Env, Expanded).process();
});
if (Style.SortUsingDeclarations)
Passes.emplace_back([&](const Environment &Env) {
return UsingDeclarationsSorter(Env, Expanded).process();
});
}
if (Style.Language == FormatStyle::LK_JavaScript &&
Style.JavaScriptQuotes != FormatStyle::JSQS_Leave)
Passes.emplace_back([&](const Environment &Env) {
return JavaScriptRequoter(Env, Expanded).process();
});
Passes.emplace_back([&](const Environment &Env) {
return Formatter(Env, Expanded, Status).process();
});
std::unique_ptr<Environment> Env = Environment::CreateVirtualEnvironment(
Code, FileName, Ranges, FirstStartColumn, NextStartColumn,
LastStartColumn);
llvm::Optional<std::string> CurrentCode = None;
tooling::Replacements Fixes;
unsigned Penalty = 0;
for (size_t I = 0, E = Passes.size(); I < E; ++I) {
std::pair<tooling::Replacements, unsigned> PassFixes = Passes[I](*Env);
auto NewCode = applyAllReplacements(
CurrentCode ? StringRef(*CurrentCode) : Code, PassFixes.first);
if (NewCode) {
Fixes = Fixes.merge(PassFixes.first);
Penalty += PassFixes.second;
if (I + 1 < E) {
CurrentCode = std::move(*NewCode);
Env = Environment::CreateVirtualEnvironment(
*CurrentCode, FileName,
tooling::calculateRangesAfterReplacements(Fixes, Ranges),
FirstStartColumn, NextStartColumn, LastStartColumn);
}
}
}
return {Fixes, Penalty};
}
} // namespace internal
tooling::Replacements reformat(const FormatStyle &Style, StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName,
FormattingAttemptStatus *Status) {
return internal::reformat(Style, Code, Ranges,
/*FirstStartColumn=*/0,
/*NextStartColumn=*/0,
/*LastStartColumn=*/0, FileName, Status)
.first;
}
tooling::Replacements cleanup(const FormatStyle &Style, StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName) {
// cleanups only apply to C++ (they mostly concern ctor commas etc.)
if (Style.Language != FormatStyle::LK_Cpp)
return tooling::Replacements();
std::unique_ptr<Environment> Env =
Environment::CreateVirtualEnvironment(Code, FileName, Ranges);
Cleaner Clean(*Env, Style);
return Clean.process().first;
}
tooling::Replacements reformat(const FormatStyle &Style, StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName, bool *IncompleteFormat) {
FormattingAttemptStatus Status;
auto Result = reformat(Style, Code, Ranges, FileName, &Status);
if (!Status.FormatComplete)
*IncompleteFormat = true;
return Result;
}
tooling::Replacements fixNamespaceEndComments(const FormatStyle &Style,
StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName) {
std::unique_ptr<Environment> Env =
Environment::CreateVirtualEnvironment(Code, FileName, Ranges);
NamespaceEndCommentsFixer Fix(*Env, Style);
return Fix.process().first;
}
tooling::Replacements sortUsingDeclarations(const FormatStyle &Style,
StringRef Code,
ArrayRef<tooling::Range> Ranges,
StringRef FileName) {
std::unique_ptr<Environment> Env =
Environment::CreateVirtualEnvironment(Code, FileName, Ranges);
UsingDeclarationsSorter Sorter(*Env, Style);
return Sorter.process().first;
}
LangOptions getFormattingLangOpts(const FormatStyle &Style) {
LangOptions LangOpts;
LangOpts.CPlusPlus = 1;
LangOpts.CPlusPlus11 = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
LangOpts.CPlusPlus14 = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
LangOpts.CPlusPlus17 = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
LangOpts.CPlusPlus2a = Style.Standard == FormatStyle::LS_Cpp03 ? 0 : 1;
LangOpts.LineComment = 1;
bool AlternativeOperators = Style.isCpp();
LangOpts.CXXOperatorNames = AlternativeOperators ? 1 : 0;
LangOpts.Bool = 1;
LangOpts.ObjC1 = 1;
LangOpts.ObjC2 = 1;
LangOpts.MicrosoftExt = 1; // To get kw___try, kw___finally.
LangOpts.DeclSpecKeyword = 1; // To get __declspec.
return LangOpts;
}
const char *StyleOptionHelpDescription =
"Coding style, currently supports:\n"
" LLVM, Google, Chromium, Mozilla, WebKit.\n"
"Use -style=file to load style configuration from\n"
".clang-format file located in one of the parent\n"
"directories of the source file (or current\n"
"directory for stdin).\n"
"Use -style=\"{key: value, ...}\" to set specific\n"
"parameters, e.g.:\n"
" -style=\"{BasedOnStyle: llvm, IndentWidth: 8}\"";
static FormatStyle::LanguageKind getLanguageByFileName(StringRef FileName) {
if (FileName.endswith(".java"))
return FormatStyle::LK_Java;
if (FileName.endswith_lower(".js") || FileName.endswith_lower(".ts"))
return FormatStyle::LK_JavaScript; // JavaScript or TypeScript.
if (FileName.endswith(".m") || FileName.endswith(".mm"))
return FormatStyle::LK_ObjC;
if (FileName.endswith_lower(".proto") ||
FileName.endswith_lower(".protodevel"))
return FormatStyle::LK_Proto;
if (FileName.endswith_lower(".textpb") ||
FileName.endswith_lower(".pb.txt") ||
FileName.endswith_lower(".textproto") ||
FileName.endswith_lower(".asciipb"))
return FormatStyle::LK_TextProto;
if (FileName.endswith_lower(".td"))
return FormatStyle::LK_TableGen;
return FormatStyle::LK_Cpp;
}
FormatStyle::LanguageKind guessLanguage(StringRef FileName, StringRef Code) {
const auto GuessedLanguage = getLanguageByFileName(FileName);
if (GuessedLanguage == FormatStyle::LK_Cpp) {
auto Extension = llvm::sys::path::extension(FileName);
// If there's no file extension (or it's .h), we need to check the contents
// of the code to see if it contains Objective-C.
if (Extension.empty() || Extension == ".h") {
auto NonEmptyFileName = FileName.empty() ? "guess.h" : FileName;
std::unique_ptr<Environment> Env =
Environment::CreateVirtualEnvironment(Code, NonEmptyFileName, /*Ranges=*/{});
ObjCHeaderStyleGuesser Guesser(*Env, getLLVMStyle());
Guesser.process();
if (Guesser.isObjC())
return FormatStyle::LK_ObjC;
}
}
return GuessedLanguage;
}
llvm::Expected<FormatStyle> getStyle(StringRef StyleName, StringRef FileName,
StringRef FallbackStyleName,
StringRef Code, vfs::FileSystem *FS) {
if (!FS) {
FS = vfs::getRealFileSystem().get();
}
FormatStyle Style = getLLVMStyle();
Style.Language = guessLanguage(FileName, Code);
FormatStyle FallbackStyle = getNoStyle();
if (!getPredefinedStyle(FallbackStyleName, Style.Language, &FallbackStyle))
return make_string_error("Invalid fallback style \"" + FallbackStyleName);
if (StyleName.startswith("{")) {
// Parse YAML/JSON style from the command line.
if (std::error_code ec = parseConfiguration(StyleName, &Style))
return make_string_error("Error parsing -style: " + ec.message());
return Style;
}
if (!StyleName.equals_lower("file")) {
if (!getPredefinedStyle(StyleName, Style.Language, &Style))
return make_string_error("Invalid value for -style");
return Style;
}
// Look for .clang-format/_clang-format file in the file's parent directories.
SmallString<128> UnsuitableConfigFiles;
SmallString<128> Path(FileName);
if (std::error_code EC = FS->makeAbsolute(Path))
return make_string_error(EC.message());
for (StringRef Directory = Path; !Directory.empty();
Directory = llvm::sys::path::parent_path(Directory)) {
auto Status = FS->status(Directory);
if (!Status ||
Status->getType() != llvm::sys::fs::file_type::directory_file) {
continue;
}
SmallString<128> ConfigFile(Directory);
llvm::sys::path::append(ConfigFile, ".clang-format");
DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
Status = FS->status(ConfigFile.str());
bool FoundConfigFile =
Status && (Status->getType() == llvm::sys::fs::file_type::regular_file);
if (!FoundConfigFile) {
// Try _clang-format too, since dotfiles are not commonly used on Windows.
ConfigFile = Directory;
llvm::sys::path::append(ConfigFile, "_clang-format");
DEBUG(llvm::dbgs() << "Trying " << ConfigFile << "...\n");
Status = FS->status(ConfigFile.str());
FoundConfigFile = Status && (Status->getType() ==
llvm::sys::fs::file_type::regular_file);
}
if (FoundConfigFile) {
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> Text =
FS->getBufferForFile(ConfigFile.str());
if (std::error_code EC = Text.getError())
return make_string_error(EC.message());
if (std::error_code ec =
parseConfiguration(Text.get()->getBuffer(), &Style)) {
if (ec == ParseError::Unsuitable) {
if (!UnsuitableConfigFiles.empty())
UnsuitableConfigFiles.append(", ");
UnsuitableConfigFiles.append(ConfigFile);
continue;
}
return make_string_error("Error reading " + ConfigFile + ": " +
ec.message());
}
DEBUG(llvm::dbgs() << "Using configuration file " << ConfigFile << "\n");
return Style;
}
}
if (!UnsuitableConfigFiles.empty())
return make_string_error("Configuration file(s) do(es) not support " +
getLanguageName(Style.Language) + ": " +
UnsuitableConfigFiles);
return FallbackStyle;
}
} // namespace format
} // namespace clang
Reference in New Issue View Git Blame Copy Permalink