Implemented clang-tidy-check-specific options.

Summary:
Each check can implement readOptions and storeOptions methods to read
and store custom options. Each check's options are stored in a local namespace
to avoid name collisions and provide some sort of context to the user.

Reviewers: bkramer, klimek

Reviewed By: klimek

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D5296

llvm-svn: 217661

clang-tools-extra/clang-tidy/ClangTidy.cpp

@@ -214,13 +214,11 @@ ClangTidyASTConsumerFactory::CreateASTConsumer(
   Context.setASTContext(&Compiler.getASTContext());
 
   std::vector<std::unique_ptr<ClangTidyCheck>> Checks;
-  GlobList &Filter = Context.getChecksFilter();
-  CheckFactories->createChecks(Filter, Checks);
+  CheckFactories->createChecks(&Context, Checks);
 
   std::unique_ptr<ast_matchers::MatchFinder> Finder(
       new ast_matchers::MatchFinder);
   for (auto &Check : Checks) {
-    Check->setContext(&Context);
     Check->registerMatchers(&*Finder);
     Check->registerPPCallbacks(Compiler);
   }
@@ -235,6 +233,7 @@ ClangTidyASTConsumerFactory::CreateASTConsumer(
   AnalyzerOptions->Config["cfg-temporary-dtors"] =
       Context.getOptions().AnalyzeTemporaryDtors ? "true" : "false";
 
+  GlobList &Filter = Context.getChecksFilter();
   AnalyzerOptions->CheckersControlList = getCheckersControlList(Filter);
   if (!AnalyzerOptions->CheckersControlList.empty()) {
     AnalyzerOptions->AnalysisStoreOpt = RegionStoreModel;
@@ -251,9 +250,9 @@ ClangTidyASTConsumerFactory::CreateASTConsumer(
       std::move(Consumers), std::move(Finder), std::move(Checks));
 }
 
-std::vector<std::string>
-ClangTidyASTConsumerFactory::getCheckNames(GlobList &Filter) {
+std::vector<std::string> ClangTidyASTConsumerFactory::getCheckNames() {
   std::vector<std::string> CheckNames;
+  GlobList &Filter = Context.getChecksFilter();
   for (const auto &CheckFactory : *CheckFactories) {
     if (Filter.contains(CheckFactory.first))
       CheckNames.push_back(CheckFactory.first);
@@ -266,6 +265,15 @@ ClangTidyASTConsumerFactory::getCheckNames(GlobList &Filter) {
   return CheckNames;
 }
 
+ClangTidyOptions::OptionMap ClangTidyASTConsumerFactory::getCheckOptions() {
+  ClangTidyOptions::OptionMap Options;
+  std::vector<std::unique_ptr<ClangTidyCheck>> Checks;
+  CheckFactories->createChecks(&Context, Checks);
+  for (const auto &Check : Checks)
+    Check->storeOptions(Options);
+  return Options;
+}
+
 ClangTidyASTConsumerFactory::CheckersList
 ClangTidyASTConsumerFactory::getCheckersControlList(GlobList &Filter) {
   CheckersList List;
@@ -307,9 +315,25 @@ void ClangTidyCheck::run(const ast_matchers::MatchFinder::MatchResult &Result) {
   check(Result);
 }
 
-void ClangTidyCheck::setName(StringRef Name) {
-  assert(CheckName.empty());
-  CheckName = Name.str();
+OptionsView::OptionsView(StringRef CheckName,
+                         const ClangTidyOptions::OptionMap &CheckOptions)
+    : NamePrefix(CheckName.str() + "."), CheckOptions(CheckOptions) {}
+
+std::string OptionsView::get(StringRef LocalName, std::string Default) const {
+  const auto &Iter = CheckOptions.find(NamePrefix + LocalName.str());
+  if (Iter != CheckOptions.end())
+    return Iter->second;
+  return Default;
+}
+
+void OptionsView::store(ClangTidyOptions::OptionMap &Options,
+                        StringRef LocalName, StringRef Value) const {
+  Options[NamePrefix + LocalName.str()] = Value;
+}
+
+void OptionsView::store(ClangTidyOptions::OptionMap &Options,
+                        StringRef LocalName, int64_t Value) const {
+  store(Options, LocalName, llvm::itostr(Value));
 }
 
 std::vector<std::string> getCheckNames(const ClangTidyOptions &Options) {
@@ -317,7 +341,15 @@ std::vector<std::string> getCheckNames(const ClangTidyOptions &Options) {
       llvm::make_unique<DefaultOptionsProvider>(ClangTidyGlobalOptions(),
                                                 Options));
   ClangTidyASTConsumerFactory Factory(Context);
-  return Factory.getCheckNames(Context.getChecksFilter());
+  return Factory.getCheckNames();
+}
+
+ClangTidyOptions::OptionMap getCheckOptions(const ClangTidyOptions &Options) {
+  clang::tidy::ClangTidyContext Context(
+      llvm::make_unique<DefaultOptionsProvider>(ClangTidyGlobalOptions(),
+                                                Options));
+  ClangTidyASTConsumerFactory Factory(Context);
+  return Factory.getCheckOptions();
 }
 
 ClangTidyStats

clang-tools-extra/clang-tidy/ClangTidy.h

@@ -16,7 +16,10 @@
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceManager.h"
 #include "clang/Tooling/Refactoring.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/raw_ostream.h"
 #include <memory>
+#include <type_traits>
 #include <vector>
 
 namespace clang {
@@ -28,6 +31,55 @@ class CompilationDatabase;
 
 namespace tidy {
 
+/// \brief Provides access to the \c ClangTidyCheck options via check-local
+/// names.
+///
+/// Methods of this class prepend <tt>CheckName + "."</tt> to translate
+/// check-local option names to global option names.
+class OptionsView {
+public:
+  /// \brief Initializes the instance using \p CheckName + "." as a prefix.
+  OptionsView(StringRef CheckName,
+              const ClangTidyOptions::OptionMap &CheckOptions);
+
+  /// \brief Read a named option from the \c Context.
+  ///
+  /// Reads the option with the check-local name \p LocalName from the
+  /// \c CheckOptions. If the corresponding key is not present, returns
+  /// \p Default.
+  std::string get(StringRef LocalName, std::string Default) const;
+
+  /// \brief Read a named option from the \c Context and parse it as an integral
+  /// type \c T.
+  ///
+  /// Reads the option with the check-local name \p LocalName from the
+  /// \c CheckOptions. If the corresponding key is not present, returns
+  /// \p Default.
+  template <typename T>
+  typename std::enable_if<std::is_integral<T>::value, T>::type
+  get(StringRef LocalName, T Default) const {
+    std::string Value = get(LocalName, "");
+    T Result = Default;
+    if (!Value.empty())
+      StringRef(Value).getAsInteger(10, Result);
+    return Result;
+  }
+
+  /// \brief Stores an option with the check-local name \p LocalName with string
+  /// value \p Value to \p Options.
+  void store(ClangTidyOptions::OptionMap &Options, StringRef LocalName,
+             StringRef Value) const;
+
+  /// \brief Stores an option with the check-local name \p LocalName with
+  /// \c int64_t value \p Value to \p Options.
+  void store(ClangTidyOptions::OptionMap &Options, StringRef LocalName,
+             int64_t Value) const;
+
+private:
+  std::string NamePrefix;
+  const ClangTidyOptions::OptionMap &CheckOptions;
+};
+
 /// \brief Base class for all clang-tidy checks.
 ///
 /// To implement a \c ClangTidyCheck, write a subclass and overwrite some of the
@@ -49,6 +101,18 @@ namespace tidy {
 /// useful/necessary.
 class ClangTidyCheck : public ast_matchers::MatchFinder::MatchCallback {
 public:
+  /// \brief Initializes the check with \p CheckName and \p Context.
+  ///
+  /// Derived classes must implement the constructor with this signature or
+  /// delegate it. If a check needs to read options, it can do this in the
+  /// constructor using the Options.get() methods below.
+  ClangTidyCheck(StringRef CheckName, ClangTidyContext *Context)
+      : CheckName(CheckName), Context(Context),
+        Options(CheckName, Context->getOptions().CheckOptions) {
+    assert(Context != nullptr);
+    assert(!CheckName.empty());
+  }
+
   virtual ~ClangTidyCheck() {}
 
   /// \brief Overwrite this to register \c PPCallbacks with \c Compiler.
@@ -75,21 +139,24 @@ public:
   /// work in here.
   virtual void check(const ast_matchers::MatchFinder::MatchResult &Result) {}
 
-  /// \brief The infrastructure sets the context to \p Ctx with this function.
-  void setContext(ClangTidyContext *Ctx) { Context = Ctx; }
-
   /// \brief Add a diagnostic with the check's name.
   DiagnosticBuilder diag(SourceLocation Loc, StringRef Description,
                          DiagnosticIDs::Level Level = DiagnosticIDs::Warning);
 
-  /// \brief Sets the check name. Intended to be used by the clang-tidy
-  /// framework. Can be called only once.
-  void setName(StringRef Name);
+  /// \brief Should store all options supported by this check with their
+  /// current values or default values for options that haven't been overridden.
+  ///
+  /// The check should use \c Options.store() to store each option it supports
+  /// whether it has the default value or it has been overridden.
+  virtual void storeOptions(ClangTidyOptions::OptionMap &Options) {}
 
 private:
   void run(const ast_matchers::MatchFinder::MatchResult &Result) override;
-  ClangTidyContext *Context;
   std::string CheckName;
+  ClangTidyContext *Context;
+
+protected:
+  OptionsView Options;
 };
 
 class ClangTidyCheckFactories;
@@ -103,10 +170,13 @@ public:
   CreateASTConsumer(clang::CompilerInstance &Compiler, StringRef File);
 
   /// \brief Get the list of enabled checks.
-  std::vector<std::string> getCheckNames(GlobList &Filter);
+  std::vector<std::string> getCheckNames();
+
+  /// \brief Get the union of options from all checks.
+  ClangTidyOptions::OptionMap getCheckOptions();
 
 private:
-  typedef std::vector<std::pair<std::string, bool> > CheckersList;
+  typedef std::vector<std::pair<std::string, bool>> CheckersList;
   CheckersList getCheckersControlList(GlobList &Filter);
 
   ClangTidyContext &Context;
@@ -117,6 +187,14 @@ private:
 /// filters are applied.
 std::vector<std::string> getCheckNames(const ClangTidyOptions &Options);
 
+/// \brief Returns the effective check-specific options.
+///
+/// The method configures ClangTidy with the specified \p Options and collects
+/// effective options from all created checks. The returned set of options
+/// includes default check-specific options for all keys not overridden by \p
+/// Options.
+ClangTidyOptions::OptionMap getCheckOptions(const ClangTidyOptions &Options);
+
 /// \brief Run a set of clang-tidy checks on a set of files.
 ClangTidyStats
 runClangTidy(std::unique_ptr<ClangTidyOptionsProvider> OptionsProvider,

clang-tools-extra/clang-tidy/ClangTidyModule.cpp

@@ -16,19 +16,18 @@
 namespace clang {
 namespace tidy {
 
-void ClangTidyCheckFactories::registerCheckFactory(
-    StringRef Name, std::function<ClangTidyCheck *()> Factory) {
+void ClangTidyCheckFactories::registerCheckFactory(StringRef Name,
+                                                   CheckFactory Factory) {
   Factories[Name] = Factory;
 }
 
 void ClangTidyCheckFactories::createChecks(
-    GlobList &Filter, std::vector<std::unique_ptr<ClangTidyCheck>> &Checks) {
+    ClangTidyContext *Context,
+    std::vector<std::unique_ptr<ClangTidyCheck>> &Checks) {
+  GlobList &Filter = Context->getChecksFilter();
   for (const auto &Factory : Factories) {
-    if (Filter.contains(Factory.first)) {
-      ClangTidyCheck *Check = Factory.second();
-      Check->setName(Factory.first);
-      Checks.emplace_back(Check);
-    }
+    if (Filter.contains(Factory.first))
+      Checks.emplace_back(Factory.second(Factory.first, Context));
   }
 }
 

clang-tools-extra/clang-tidy/ClangTidyModule.h

@@ -26,11 +26,13 @@ namespace tidy {
 /// this object.
 class ClangTidyCheckFactories {
 public:
+  typedef std::function<ClangTidyCheck *(
+      StringRef Name, ClangTidyContext *Context)> CheckFactory;
+
   /// \brief Registers check \p Factory with name \p Name.
   ///
   /// For all checks that have default constructors, use \c registerCheck.
-  void registerCheckFactory(StringRef Name,
-                            std::function<ClangTidyCheck *()> Factory);
+  void registerCheckFactory(StringRef Name, CheckFactory Factory);
 
   /// \brief Registers the \c CheckType with the name \p Name.
   ///
@@ -53,19 +55,21 @@ public:
   ///   }
   /// };
   /// \endcode
-  template<typename CheckType>
-  void registerCheck(StringRef Name) {
-    registerCheckFactory(Name, []() { return new CheckType(); });
+  template <typename CheckType> void registerCheck(StringRef CheckName) {
+    registerCheckFactory(CheckName,
+                         [](StringRef Name, ClangTidyContext *Context) {
+      return new CheckType(Name, Context);
+    });
   }
 
   /// \brief Create instances of all checks matching \p CheckRegexString and
   /// store them in \p Checks.
   ///
   /// The caller takes ownership of the return \c ClangTidyChecks.
-  void createChecks(GlobList &Filter,
+  void createChecks(ClangTidyContext *Context,
                     std::vector<std::unique_ptr<ClangTidyCheck>> &Checks);
 
-  typedef std::map<std::string, std::function<ClangTidyCheck *()>> FactoryMap;
+  typedef std::map<std::string, CheckFactory> FactoryMap;
   FactoryMap::const_iterator begin() const { return Factories.begin(); }
   FactoryMap::const_iterator end() const { return Factories.end(); }
   bool empty() const { return Factories.empty(); }

clang-tools-extra/clang-tidy/ClangTidyOptions.cpp

@@ -25,6 +25,7 @@ using clang::tidy::FileFilter;
 
 LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(FileFilter)
 LLVM_YAML_IS_FLOW_SEQUENCE_VECTOR(FileFilter::LineRange)
+LLVM_YAML_IS_SEQUENCE_VECTOR(ClangTidyOptions::StringPair);
 
 namespace llvm {
 namespace yaml {
@@ -57,11 +58,34 @@ template <> struct MappingTraits<FileFilter> {
   }
 };
 
+template <> struct MappingTraits<ClangTidyOptions::StringPair> {
+  static void mapping(IO &IO, ClangTidyOptions::StringPair &KeyValue) {
+    IO.mapRequired("key", KeyValue.first);
+    IO.mapRequired("value", KeyValue.second);
+  }
+};
+
+struct NOptionMap {
+  NOptionMap(IO &) {}
+  NOptionMap(IO &, const ClangTidyOptions::OptionMap &OptionMap)
+      : Options(OptionMap.begin(), OptionMap.end()) {}
+  ClangTidyOptions::OptionMap denormalize(IO &) {
+    ClangTidyOptions::OptionMap Map;
+    for (const auto &KeyValue : Options)
+      Map[KeyValue.first] = KeyValue.second;
+    return Map;
+  }
+  std::vector<ClangTidyOptions::StringPair> Options;
+};
+
 template <> struct MappingTraits<ClangTidyOptions> {
   static void mapping(IO &IO, ClangTidyOptions &Options) {
+    MappingNormalization<NOptionMap, ClangTidyOptions::OptionMap> NOpts(
+        IO, Options.CheckOptions);
     IO.mapOptional("Checks", Options.Checks);
     IO.mapOptional("HeaderFilterRegex", Options.HeaderFilterRegex);
     IO.mapOptional("AnalyzeTemporaryDtors", Options.AnalyzeTemporaryDtors);
+    IO.mapOptional("CheckOptions", NOpts->Options);
   }
 };
 
@@ -85,6 +109,10 @@ ClangTidyOptions::mergeWith(const ClangTidyOptions &Other) const {
     Result.HeaderFilterRegex = Other.HeaderFilterRegex;
   if (Other.AnalyzeTemporaryDtors)
     Result.AnalyzeTemporaryDtors = Other.AnalyzeTemporaryDtors;
+
+  for (const auto &KeyValue : Other.CheckOptions)
+    Result.CheckOptions[KeyValue.first] = KeyValue.second;
+
   return Result;
 }
 
@@ -169,6 +197,10 @@ FileOptionsProvider::TryReadConfigFile(StringRef Directory) {
       llvm::MemoryBuffer::getFile(ConfigFile.c_str());
   if (std::error_code EC = Text.getError())
     return EC;
+  // Skip empty files, e.g. files opened for writing via shell output
+  // redirection.
+  if ((*Text)->getBuffer().empty())
+    return make_error_code(llvm::errc::no_such_file_or_directory);
   if (std::error_code EC = parseConfiguration((*Text)->getBuffer(), Options))
     return EC;
   return Options.mergeWith(OverrideOptions);

clang-tools-extra/clang-tidy/ClangTidyOptions.h

@@ -14,6 +14,7 @@
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/ErrorOr.h"
+#include <map>
 #include <string>
 #include <system_error>
 #include <utility>
@@ -70,6 +71,12 @@ struct ClangTidyOptions {
 
   /// \brief Turns on temporary destructor-based analysis.
   llvm::Optional<bool> AnalyzeTemporaryDtors;
+
+  typedef std::pair<std::string, std::string> StringPair;
+  typedef std::map<std::string, std::string> OptionMap;
+
+  /// \brief Key-value mapping used to store check-specific options.
+  OptionMap CheckOptions;
 };
 
 /// \brief Abstract interface for retrieving various ClangTidy options.

clang-tools-extra/clang-tidy/google/AvoidCStyleCastsCheck.h

@@ -26,6 +26,8 @@ namespace readability {
 /// ones generated by -Wold-style-cast.
 class AvoidCStyleCastsCheck : public ClangTidyCheck {
 public:
+  AvoidCStyleCastsCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/ExplicitConstructorCheck.h

@@ -21,6 +21,8 @@ namespace tidy {
 /// http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml#Explicit_Constructors
 class ExplicitConstructorCheck : public ClangTidyCheck {
 public:
+  ExplicitConstructorCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/ExplicitMakePairCheck.h

@@ -24,6 +24,8 @@ namespace build {
 /// Corresponding cpplint.py check name: 'build/explicit_make_pair'.
 class ExplicitMakePairCheck : public ClangTidyCheck {
 public:
+  ExplicitMakePairCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/IntegerTypesCheck.h

@@ -21,9 +21,9 @@ namespace runtime {
 /// Correspondig cpplint.py check: runtime/int.
 class IntegerTypesCheck : public ClangTidyCheck {
 public:
-  IntegerTypesCheck()
-      : UnsignedTypePrefix("uint"), SignedTypePrefix("int"),
-        AddUnderscoreT(false) {}
+  IntegerTypesCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context), UnsignedTypePrefix("uint"),
+        SignedTypePrefix("int"), AddUnderscoreT(false) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 

clang-tools-extra/clang-tidy/google/MemsetZeroLengthCheck.h

@@ -24,6 +24,8 @@ namespace runtime {
 /// Corresponding cpplint.py check name: 'runtime/memset'.
 class MemsetZeroLengthCheck : public ClangTidyCheck {
 public:
+  MemsetZeroLengthCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/NamedParameterCheck.h

@@ -22,6 +22,8 @@ namespace readability {
 /// Corresponding cpplint.py check name: 'readability/function'.
 class NamedParameterCheck : public ClangTidyCheck {
 public:
+  NamedParameterCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/OverloadedUnaryAndCheck.h

@@ -22,6 +22,8 @@ namespace runtime {
 /// Corresponding cpplint.py check name: 'runtime/operator'.
 class OverloadedUnaryAndCheck : public ClangTidyCheck {
 public:
+  OverloadedUnaryAndCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/StringReferenceMemberCheck.h

@@ -39,6 +39,8 @@ namespace runtime {
 /// Corresponding cpplint.py check name: 'runtime/member_string_reference'.
 class StringReferenceMemberCheck : public ClangTidyCheck {
 public:
+  StringReferenceMemberCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/UnnamedNamespaceInHeaderCheck.h

@@ -22,6 +22,8 @@ namespace build {
 /// Corresponding cpplint.py check name: 'build/namespaces'.
 class UnnamedNamespaceInHeaderCheck : public ClangTidyCheck {
 public:
+  UnnamedNamespaceInHeaderCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/google/UsingNamespaceDirectiveCheck.h

@@ -22,6 +22,8 @@ namespace build {
 /// Corresponding cpplint.py check name: 'build/namespaces'.
 class UsingNamespaceDirectiveCheck : public ClangTidyCheck {
 public:
+  UsingNamespaceDirectiveCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/llvm/HeaderGuardCheck.h

@@ -18,6 +18,8 @@ namespace tidy {
 /// Finds and fixes header guards that do not adhere to LLVM style.
 class LLVMHeaderGuardCheck : public HeaderGuardCheck {
 public:
+  LLVMHeaderGuardCheck(StringRef Name, ClangTidyContext *Context)
+      : HeaderGuardCheck(Name, Context) {}
   bool shouldSuggestEndifComment(StringRef Filename) override { return false; }
   bool shouldFixHeaderGuard(StringRef Filename) override;
   std::string getHeaderGuard(StringRef Filename, StringRef OldGuard) override;

clang-tools-extra/clang-tidy/llvm/IncludeOrderCheck.h

@@ -20,6 +20,8 @@ namespace tidy {
 /// see: http://llvm.org/docs/CodingStandards.html#include-style
 class IncludeOrderCheck : public ClangTidyCheck {
 public:
+  IncludeOrderCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerPPCallbacks(CompilerInstance &Compiler) override;
 };
 

clang-tools-extra/clang-tidy/llvm/NamespaceCommentCheck.cpp

@@ -11,20 +11,26 @@
 #include "clang/AST/ASTContext.h"
 #include "clang/ASTMatchers/ASTMatchers.h"
 #include "clang/Lex/Lexer.h"
-
-
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/ADT/StringExtras.h"
 
 using namespace clang::ast_matchers;
 
 namespace clang {
 namespace tidy {
 
-NamespaceCommentCheck::NamespaceCommentCheck()
-    : NamespaceCommentPattern("^/[/*] *(end (of )?)? *(anonymous|unnamed)? *"
+NamespaceCommentCheck::NamespaceCommentCheck(StringRef Name,
+                                             ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      NamespaceCommentPattern("^/[/*] *(end (of )?)? *(anonymous|unnamed)? *"
                               "namespace( +([a-zA-Z0-9_]+))? *(\\*/)?$",
                               llvm::Regex::IgnoreCase),
-      ShortNamespaceLines(1) {}
+      ShortNamespaceLines(Options.get("ShortNamespaceLines", 1u)),
+      SpacesBeforeComments(Options.get("SpacesBeforeComments", 1u)) {}
+
+void NamespaceCommentCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
+  Options.store(Opts, "ShortNamespaceLines", ShortNamespaceLines);
+  Options.store(Opts, "SpacesBeforeComments", SpacesBeforeComments);
+}
 
 void NamespaceCommentCheck::registerMatchers(MatchFinder *Finder) {
   Finder->addMatcher(namespaceDecl().bind("namespace"), this);
@@ -36,10 +42,12 @@ bool locationsInSameFile(const SourceManager &Sources, SourceLocation Loc1,
          Sources.getFileID(Loc1) == Sources.getFileID(Loc2);
 }
 
-std::string getNamespaceComment(const NamespaceDecl *ND, bool InsertLineBreak) {
+std::string getNamespaceComment(const NamespaceDecl *ND, bool InsertLineBreak,
+                                unsigned SpacesBeforeComments) {
   std::string Fix = "// namespace";
   if (!ND->isAnonymousNamespace())
-    Fix.append(" ").append(ND->getNameAsString());
+    Fix.append(std::string(SpacesBeforeComments, ' '))
+        .append(ND->getNameAsString());
   if (InsertLineBreak)
     Fix.append("\n");
   return Fix;
@@ -97,7 +105,8 @@ void NamespaceCommentCheck::check(const MatchFinder::MatchResult &Result) {
       diag(Loc, "namespace closing comment refers to a wrong namespace '%0'")
           << NamespaceNameInComment
           << FixItHint::CreateReplacement(
-                 OldCommentRange, getNamespaceComment(ND, NeedLineBreak));
+                 OldCommentRange,
+                 getNamespaceComment(ND, NeedLineBreak, SpacesBeforeComments));
       return;
     }
 
@@ -110,7 +119,8 @@ void NamespaceCommentCheck::check(const MatchFinder::MatchResult &Result) {
 
   diag(ND->getLocation(), "namespace not terminated with a closing comment")
       << FixItHint::CreateInsertion(
-          AfterRBrace, " " + getNamespaceComment(ND, NeedLineBreak));
+          AfterRBrace,
+          " " + getNamespaceComment(ND, NeedLineBreak, SpacesBeforeComments));
 }
 
 } // namespace tidy

clang-tools-extra/clang-tidy/llvm/NamespaceCommentCheck.h

@@ -21,13 +21,16 @@ namespace tidy {
 /// see: http://llvm.org/docs/CodingStandards.html#namespace-indentation
 class NamespaceCommentCheck : public ClangTidyCheck {
 public:
-  NamespaceCommentCheck();
+  NamespaceCommentCheck(StringRef Name, ClangTidyContext *Context);
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 
 private:
+  void storeOptions(ClangTidyOptions::OptionMap &Options) override;
+
   llvm::Regex NamespaceCommentPattern;
   const unsigned ShortNamespaceLines;
+  const unsigned SpacesBeforeComments;
 };
 
 } // namespace tidy

clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.cpp

@@ -17,8 +17,6 @@ using namespace clang::ast_matchers;
 namespace clang {
 namespace tidy {
 
-TwineLocalCheck::TwineLocalCheck() {}
-
 void TwineLocalCheck::registerMatchers(MatchFinder *Finder) {
   auto TwineType =
       qualType(hasDeclaration(recordDecl(hasName("::llvm::Twine"))));

clang-tools-extra/clang-tidy/llvm/TwineLocalCheck.h

@@ -19,7 +19,8 @@ namespace tidy {
 /// and should be generally avoided.
 class TwineLocalCheck : public ClangTidyCheck {
 public:
-  TwineLocalCheck();
+  TwineLocalCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/misc/ArgumentCommentCheck.cpp

@@ -18,8 +18,10 @@ using namespace clang::ast_matchers;
 namespace clang {
 namespace tidy {
 
-ArgumentCommentCheck::ArgumentCommentCheck()
-    : IdentRE("^(/\\* *)([_A-Za-z][_A-Za-z0-9]*)( *= *\\*/)$") {}
+ArgumentCommentCheck::ArgumentCommentCheck(StringRef Name,
+                                           ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      IdentRE("^(/\\* *)([_A-Za-z][_A-Za-z0-9]*)( *= *\\*/)$") {}
 
 void ArgumentCommentCheck::registerMatchers(MatchFinder *Finder) {
   Finder->addMatcher(

clang-tools-extra/clang-tidy/misc/ArgumentCommentCheck.h

@@ -19,7 +19,7 @@ namespace tidy {
 /// \brief Checks that argument comments match parameter names.
 class ArgumentCommentCheck : public ClangTidyCheck {
 public:
-  ArgumentCommentCheck();
+  ArgumentCommentCheck(StringRef Name, ClangTidyContext *Context);
 
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;

clang-tools-extra/clang-tidy/misc/BoolPointerImplicitConversion.h

@@ -23,6 +23,8 @@ namespace tidy {
 /// }
 class BoolPointerImplicitConversion : public ClangTidyCheck {
 public:
+  BoolPointerImplicitConversion(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/misc/RedundantSmartptrGet.h

@@ -23,6 +23,8 @@ namespace tidy {
 ///   *ptr->get()  ==>  **ptr
 class RedundantSmartptrGet : public ClangTidyCheck {
 public:
+  RedundantSmartptrGet(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/misc/SwappedArgumentsCheck.h

@@ -19,6 +19,8 @@ namespace tidy {
 /// conversions.
 class SwappedArgumentsCheck : public ClangTidyCheck {
 public:
+  SwappedArgumentsCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/misc/UndelegatedConstructor.h

@@ -20,6 +20,8 @@ namespace tidy {
 /// meant to use a delegating constructor or base class initializer.
 class UndelegatedConstructorCheck : public ClangTidyCheck {
 public:
+  UndelegatedConstructorCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/misc/UnusedRAII.h

@@ -37,6 +37,8 @@ namespace tidy {
 ///   - Ignore objects returned from a call.
 class UnusedRAIICheck : public ClangTidyCheck {
 public:
+  UnusedRAIICheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/misc/UseOverride.h

@@ -18,6 +18,8 @@ namespace tidy {
 /// \brief Use C++11's 'override' and remove 'virtual' where applicable.
 class UseOverride : public ClangTidyCheck {
 public:
+  UseOverride(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override;
   void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
 };

clang-tools-extra/clang-tidy/tool/ClangTidyMain.cpp

@@ -173,6 +173,7 @@ int clangTidyMain(int argc, const char **argv) {
   }
 
   if (DumpConfig) {
+    EffectiveOptions.CheckOptions = getCheckOptions(EffectiveOptions);
     llvm::outs() << configurationAsText(ClangTidyOptions::getDefaults()
                                             .mergeWith(EffectiveOptions))
                  << "\n";

clang-tools-extra/clang-tidy/utils/HeaderGuard.h

@@ -18,6 +18,8 @@ namespace tidy {
 /// \brief Finds and fixes header guards.
 class HeaderGuardCheck : public ClangTidyCheck {
 public:
+  HeaderGuardCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerPPCallbacks(CompilerInstance &Compiler) override;
 
   /// \brief Returns true if the checker should suggest inserting a trailing

clang-tools-extra/unittests/clang-tidy/ClangTidyDiagnosticConsumerTest.cpp

@@ -8,6 +8,8 @@ namespace test {
 
 class TestCheck : public ClangTidyCheck {
 public:
+  TestCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
   void registerMatchers(ast_matchers::MatchFinder *Finder) override {
     Finder->addMatcher(ast_matchers::varDecl().bind("var"), this);
   }
@@ -23,9 +25,8 @@ TEST(ClangTidyDiagnosticConsumer, SortsErrors) {
   std::vector<ClangTidyError> Errors;
   runCheckOnCode<TestCheck>("int a;", &Errors);
   EXPECT_EQ(2ul, Errors.size());
-  // FIXME: Remove " []" once the check name is removed from the message text.
-  EXPECT_EQ("type specifier []", Errors[0].Message.Message);
-  EXPECT_EQ("variable []", Errors[1].Message.Message);
+  EXPECT_EQ("type specifier", Errors[0].Message.Message);
+  EXPECT_EQ("variable", Errors[1].Message.Message);
 }
 
 TEST(GlobList, Empty) {

clang-tools-extra/unittests/clang-tidy/ClangTidyTest.h

@@ -44,13 +44,12 @@ std::string runCheckOnCode(StringRef Code,
                            std::vector<ClangTidyError> *Errors = nullptr,
                            const Twine &Filename = "input.cc",
                            ArrayRef<std::string> ExtraArgs = None) {
-  T Check;
   ClangTidyOptions Options;
   Options.Checks = "*";
   ClangTidyContext Context(llvm::make_unique<DefaultOptionsProvider>(
       ClangTidyGlobalOptions(), Options));
   ClangTidyDiagnosticConsumer DiagConsumer(Context);
-  Check.setContext(&Context);
+  T Check("test-check", &Context);
   std::vector<std::string> ArgCXX11(1, "-std=c++11");
   ArgCXX11.insert(ArgCXX11.end(), ExtraArgs.begin(), ExtraArgs.end());
 

clang-tools-extra/unittests/clang-tidy/LLVMModuleTest.cpp

@@ -95,6 +95,8 @@ static std::string runHeaderGuardCheck(StringRef Code, const Twine &Filename) {
 
 namespace {
 struct WithEndifComment : public LLVMHeaderGuardCheck {
+  WithEndifComment(StringRef Name, ClangTidyContext *Context)
+      : LLVMHeaderGuardCheck(Name, Context) {}
   bool shouldSuggestEndifComment(StringRef Filename) override { return true; }
 };
 } // namespace