Correct Doxygen syntax for inline code

There is no syntax like {@code ...} in Doxygen, @code is a block command
that ends with @endcode, and generally these are not enclosed in braces.
The correct syntax for inline code snippets is @c <code>.

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D98665

clang/include/clang/Analysis/AnyCall.h

@@ -107,8 +107,8 @@ public:
 
   }
 
-  /// If {@code E} is a generic call (to ObjC method /function/block/etc),
+  /// If @c E is a generic call (to ObjC method /function/block/etc),
-  /// return a constructed {@code AnyCall} object. Return None otherwise.
+  /// return a constructed @c AnyCall object. Return None otherwise.
   static Optional<AnyCall> forExpr(const Expr *E) {
     if (const auto *ME = dyn_cast<ObjCMessageExpr>(E)) {
       return AnyCall(ME);
@@ -127,8 +127,8 @@ public:
     }
   }
 
-  /// If {@code D} is a callable (Objective-C method or a function), return
+  /// If @c D is a callable (Objective-C method or a function), return
-  /// a constructed {@code AnyCall} object. Return None otherwise.
+  /// a constructed @c AnyCall object. Return None otherwise.
   // FIXME: block support.
   static Optional<AnyCall> forDecl(const Decl *D) {
     if (const auto *FD = dyn_cast<FunctionDecl>(D)) {
@@ -186,7 +186,7 @@ public:
   }
 
   /// \returns Function identifier if it is a named declaration,
-  /// {@code nullptr} otherwise.
+  /// @c nullptr otherwise.
   const IdentifierInfo *getIdentifier() const {
     if (const auto *ND = dyn_cast_or_null<NamedDecl>(D))
       return ND->getIdentifier();

clang/include/clang/Analysis/RetainSummaryManager.h

@@ -613,8 +613,8 @@ class RetainSummaryManager {
     const FunctionType *FT,
     bool &AllowAnnotations);
 
-  /// Apply the annotation of {@code pd} in function {@code FD}
+  /// Apply the annotation of @c pd in function @c FD
-  /// to the resulting summary stored in out-parameter {@code Template}.
+  /// to the resulting summary stored in out-parameter @c Template.
   /// \return whether an annotation was applied.
   bool applyParamAnnotationEffect(const ParmVarDecl *pd, unsigned parm_idx,
                                   const NamedDecl *FD,
@@ -715,8 +715,8 @@ private:
   /// Set argument types for arguments which are not doing anything.
   void updateSummaryForArgumentTypes(const AnyCall &C, const RetainSummary *&RS);
 
-  /// Determine whether a declaration {@code D} of correspondent type (return
+  /// Determine whether a declaration @c D of correspondent type (return
-  /// type for functions/methods) {@code QT} has any of the given attributes,
+  /// type for functions/methods) @c QT has any of the given attributes,
   /// provided they pass necessary validation checks AND tracking the given
   /// attribute is enabled.
   /// Returns the object kind corresponding to the present attribute, or None,

clang/lib/Analysis/RetainSummaryManager.cpp

@@ -881,8 +881,8 @@ RetainSummaryManager::getRetEffectFromAnnotations(QualType RetTy,
   return None;
 }
 
-/// \return Whether the chain of typedefs starting from {@code QT}
+/// \return Whether the chain of typedefs starting from @c QT
-/// has a typedef with a given name {@code Name}.
+/// has a typedef with a given name @c Name.
 static bool hasTypedefNamed(QualType QT,
                             StringRef Name) {
   while (auto *T = dyn_cast<TypedefType>(QT)) {

clang/lib/Sema/SemaDeclAttr.cpp

@@ -390,10 +390,10 @@ appendDiagnostics(const Sema::SemaDiagnosticBuilder &Bldr, T &&ExtraArg,
                            std::forward<DiagnosticArgs>(ExtraArgs)...);
 }
 
-/// Add an attribute {@code AttrType} to declaration {@code D}, provided that
+/// Add an attribute @c AttrType to declaration @c D, provided that
-/// {@code PassesCheck} is true.
+/// @c PassesCheck is true.
-/// Otherwise, emit diagnostic {@code DiagID}, passing in all parameters
+/// Otherwise, emit diagnostic @c DiagID, passing in all parameters
-/// specified in {@code ExtraArgs}.
+/// specified in @c ExtraArgs.
 template <typename AttrType, typename... DiagnosticArgs>
 static void handleSimpleAttributeOrDiagnose(Sema &S, Decl *D,
                                             const AttributeCommonInfo &CI,

clang/lib/StaticAnalyzer/Checkers/NonnullGlobalConstantsChecker.cpp

@@ -89,7 +89,7 @@ void NonnullGlobalConstantsChecker::checkLocation(SVal location, bool isLoad,
 }
 
 /// \param V loaded lvalue.
-/// \return whether {@code val} is a string-like const global.
+/// \return whether @c val is a string-like const global.
 bool NonnullGlobalConstantsChecker::isGlobalConstString(SVal V) const {
   Optional<loc::MemRegionVal> RegionVal = V.getAs<loc::MemRegionVal>();
   if (!RegionVal)
@@ -127,7 +127,7 @@ bool NonnullGlobalConstantsChecker::isGlobalConstString(SVal V) const {
   return false;
 }
 
-/// \return whether {@code type} is extremely unlikely to be null
+/// \return whether @c type is extremely unlikely to be null
 bool NonnullGlobalConstantsChecker::isNonnullType(QualType Ty) const {
 
   if (Ty->isPointerType() && Ty->getPointeeType()->isCharType())

clang/lib/StaticAnalyzer/Checkers/ObjCAutoreleaseWriteChecker.cpp

@@ -8,7 +8,7 @@
 //
 // This file defines ObjCAutoreleaseWriteChecker which warns against writes
 // into autoreleased out parameters which cause crashes.
-// An example of a problematic write is a write to {@code error} in the example
+// An example of a problematic write is a write to @c error in the example
 // below:
 //
 // - (BOOL) mymethod:(NSError *__autoreleasing *)error list:(NSArray*) list {

clang/lib/StaticAnalyzer/Checkers/RetainCountChecker/RetainCountDiagnostics.cpp

@@ -89,7 +89,7 @@ static std::string getPrettyTypeName(QualType QT) {
   return QT.getAsString();
 }
 
-/// Write information about the type state change to {@code os},
+/// Write information about the type state change to @c os,
 /// return whether the note should be generated.
 static bool shouldGenerateNote(llvm::raw_string_ostream &os,
                                const RefVal *PrevT,
@@ -164,8 +164,8 @@ static bool shouldGenerateNote(llvm::raw_string_ostream &os,
   return true;
 }
 
-/// Finds argument index of the out paramter in the call {@code S}
+/// Finds argument index of the out paramter in the call @c S
-/// corresponding to the symbol {@code Sym}.
+/// corresponding to the symbol @c Sym.
 /// If none found, returns None.
 static Optional<unsigned> findArgIdxOfSymbol(ProgramStateRef CurrSt,
                                              const LocationContext *LCtx,

clang/lib/StaticAnalyzer/Checkers/RunLoopAutoreleaseLeakChecker.cpp

@@ -57,8 +57,8 @@ public:
 
 } // end anonymous namespace
 
-/// \return Whether {@code A} occurs before {@code B} in traversal of
+/// \return Whether @c A occurs before @c B in traversal of
-/// {@code Parent}.
+/// @c Parent.
 /// Conceptually a very incomplete/unsound approximation of happens-before
 /// relationship (A is likely to be evaluated before B),
 /// but useful enough in this case.

clang/lib/StaticAnalyzer/Core/BugReporter.cpp

@@ -2738,8 +2738,8 @@ static void CompactMacroExpandedPieces(PathPieces &path,
 }
 
 /// Generate notes from all visitors.
-/// Notes associated with {@code ErrorNode} are generated using
+/// Notes associated with @c ErrorNode are generated using
-/// {@code getEndPath}, and the rest are generated with {@code VisitNode}.
+/// @c getEndPath, and the rest are generated with @c VisitNode.
 static std::unique_ptr<VisitorsDiagnosticsTy>
 generateVisitorsDiagnostics(PathSensitiveBugReport *R,
                             const ExplodedNode *ErrorNode,
@@ -2749,7 +2749,7 @@ generateVisitorsDiagnostics(PathSensitiveBugReport *R,
   PathSensitiveBugReport::VisitorList visitors;
 
   // Run visitors on all nodes starting from the node *before* the last one.
-  // The last node is reserved for notes generated with {@code getEndPath}.
+  // The last node is reserved for notes generated with @c getEndPath.
   const ExplodedNode *NextNode = ErrorNode->getFirstPred();
   while (NextNode) {
 

clang/lib/StaticAnalyzer/Core/BugReporterVisitors.cpp

@@ -1846,7 +1846,7 @@ static const MemRegion *getLocationRegionIfReference(const Expr *E,
   return nullptr;
 }
 
-/// \return A subexpression of {@code Ex} which represents the
+/// \return A subexpression of @c Ex which represents the
 /// expression-of-interest.
 static const Expr *peelOffOuterExpr(const Expr *Ex,
                                     const ExplodedNode *N) {

clang/lib/StaticAnalyzer/Core/ExprEngine.cpp

@@ -3139,8 +3139,8 @@ struct DOTGraphTraits<ExplodedGraph*> : public DefaultDOTGraphTraits {
 
   /// \p PreCallback: callback before break.
   /// \p PostCallback: callback after break.
-  /// \p Stop: stop iteration if returns {@code true}
+  /// \p Stop: stop iteration if returns @c true
-  /// \return Whether {@code Stop} ever returned {@code true}.
+  /// \return Whether @c Stop ever returned @c true.
   static bool traverseHiddenNodes(
       const ExplodedNode *N,
       llvm::function_ref<void(const ExplodedNode *)> PreCallback,

clang/lib/StaticAnalyzer/Core/PlistDiagnostics.cpp

@@ -157,8 +157,8 @@ private:
 
 } // end of anonymous namespace
 
-/// Print coverage information to output stream {@code o}.
+/// Print coverage information to output stream @c o.
-/// May modify the used list of files {@code Fids} by inserting new ones.
+/// May modify the used list of files @c Fids by inserting new ones.
 static void printCoverage(const PathDiagnostic *D,
                           unsigned InputIndentLevel,
                           SmallVectorImpl<FileID> &Fids,
@@ -484,8 +484,8 @@ void PlistPrinter::ReportPopUp(raw_ostream &o,
 // Static function definitions.
 //===----------------------------------------------------------------------===//
 
-/// Print coverage information to output stream {@code o}.
+/// Print coverage information to output stream @c o.
-/// May modify the used list of files {@code Fids} by inserting new ones.
+/// May modify the used list of files @c Fids by inserting new ones.
 static void printCoverage(const PathDiagnostic *D,
                           unsigned InputIndentLevel,
                           SmallVectorImpl<FileID> &Fids,

llvm/include/llvm/Support/GraphWriter.h

@@ -318,8 +318,8 @@ raw_ostream &WriteGraph(raw_ostream &O, const GraphType &G,
 
 std::string createGraphFilename(const Twine &Name, int &FD);
 
-/// Writes graph into a provided {@code Filename}.
+/// Writes graph into a provided @c Filename.
-/// If {@code Filename} is empty, generates a random one.
+/// If @c Filename is empty, generates a random one.
 /// \return The resulting filename, or an empty string if writing
 /// failed.
 template <typename GraphType>