void StrCatAppendCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; const auto StrCat = functionDecl(hasName("::absl::StrCat")); // The arguments of absl::StrCat are implicitly converted to AlphaNum. This // matches to the arguments because of that behavior. const auto AlphaNum = IgnoringTemporaries(cxxConstructExpr( argumentCountIs(1), hasType(cxxRecordDecl(hasName("::absl::AlphaNum"))), hasArgument(0, ignoringImpCasts(declRefExpr(to(equalsBoundNode("LHS")), expr().bind("Arg0")))))); const auto HasAnotherReferenceToLhs = callExpr(hasAnyArgument(expr(hasDescendant(declRefExpr( to(equalsBoundNode("LHS")), unless(equalsBoundNode("Arg0"))))))); // Now look for calls to operator= with an object on the LHS and a call to // StrCat on the RHS. The first argument of the StrCat call should be the same // as the LHS. Ignore calls from template instantiations. Finder->addMatcher( cxxOperatorCallExpr( unless(isInTemplateInstantiation()), hasOverloadedOperatorName("="), hasArgument(0, declRefExpr(to(decl().bind("LHS")))), hasArgument(1, IgnoringTemporaries( callExpr(callee(StrCat), hasArgument(0, AlphaNum), unless(HasAnotherReferenceToLhs)) .bind("Call")))) .bind("Op"), this); }
void InaccurateEraseCheck::registerMatchers(MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (!getLangOpts().CPlusPlus) return; const auto CheckForEndCall = hasArgument( 1, anyOf(cxxConstructExpr(has(ignoringParenImpCasts( cxxMemberCallExpr(callee(cxxMethodDecl(hasName("end")))) .bind("InaccEndCall")))), anything())); Finder->addMatcher( cxxMemberCallExpr( on(hasType(namedDecl(matchesName("^::std::")))), callee(cxxMethodDecl(hasName("erase"))), argumentCountIs(1), hasArgument(0, has(ignoringParenImpCasts( callExpr(callee(functionDecl(matchesName( "^::std::(remove(_if)?|unique)$"))), CheckForEndCall) .bind("InaccAlgCall")))), unless(isInTemplateInstantiation())) .bind("InaccErase"), this); }
void InaccurateEraseCheck::registerMatchers(MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (!getLangOpts().CPlusPlus) return; const auto EndCall = callExpr( callee(functionDecl(hasAnyName("remove", "remove_if", "unique"))), hasArgument( 1, anyOf(cxxConstructExpr(has(ignoringImplicit( cxxMemberCallExpr(callee(cxxMethodDecl(hasName("end")))) .bind("end")))), anything()))) .bind("alg"); const auto DeclInStd = type(hasUnqualifiedDesugaredType( tagType(hasDeclaration(decl(isInStdNamespace()))))); Finder->addMatcher( cxxMemberCallExpr( on(anyOf(hasType(DeclInStd), hasType(pointsTo(DeclInStd)))), callee(cxxMethodDecl(hasName("erase"))), argumentCountIs(1), hasArgument(0, has(ignoringImplicit( anyOf(EndCall, has(ignoringImplicit(EndCall)))))), unless(isInTemplateInstantiation())) .bind("erase"), this); }
void PassByValueCheck::registerMatchers(MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (!getLangOpts().CPlusPlus) return; Finder->addMatcher( cxxConstructorDecl( forEachConstructorInitializer( cxxCtorInitializer( // Clang builds a CXXConstructExpr only whin it knows which // constructor will be called. In dependent contexts a // ParenListExpr is generated instead of a CXXConstructExpr, // filtering out templates automatically for us. withInitializer(cxxConstructExpr( has(ignoringParenImpCasts(declRefExpr(to( parmVarDecl( hasType(qualType( // Match only const-ref or a non-const value // parameters. Rvalues and const-values // shouldn't be modified. anyOf(constRefType(), nonConstValueType())))) .bind("Param"))))), hasDeclaration(cxxConstructorDecl( isCopyConstructor(), unless(isDeleted()), hasDeclContext( cxxRecordDecl(isMoveConstructible()))))))) .bind("Initializer"))) .bind("Ctor"), this); }
void MakeSmartPtrCheck::registerMatchers(ast_matchers::MatchFinder *Finder) { if (!isLanguageVersionSupported(getLangOpts())) return; // Calling make_smart_ptr from within a member function of a type with a // private or protected constructor would be ill-formed. auto CanCallCtor = unless(has(ignoringImpCasts( cxxConstructExpr(hasDeclaration(decl(unless(isPublic()))))))); Finder->addMatcher( cxxBindTemporaryExpr(has(ignoringParenImpCasts( cxxConstructExpr( hasType(getSmartPointerTypeMatcher()), argumentCountIs(1), hasArgument(0, cxxNewExpr(hasType(pointsTo(qualType(hasCanonicalType( equalsBoundNode(PointerType))))), CanCallCtor) .bind(NewExpression)), unless(isInTemplateInstantiation())) .bind(ConstructorCall)))), this); Finder->addMatcher( cxxMemberCallExpr( thisPointerType(getSmartPointerTypeMatcher()), callee(cxxMethodDecl(hasName("reset"))), hasArgument(0, cxxNewExpr(CanCallCtor).bind(NewExpression)), unless(isInTemplateInstantiation())) .bind(ResetCall), this); }
void ForwardingReferenceOverloadCheck::registerMatchers(MatchFinder *Finder) { // Forwarding references require C++11 or later. if (!getLangOpts().CPlusPlus11) return; auto ForwardingRefParm = parmVarDecl( hasType(qualType(rValueReferenceType(), references(templateTypeParmType(hasDeclaration( templateTypeParmDecl().bind("type-parm-decl")))), unless(references(isConstQualified()))))) .bind("parm-var"); DeclarationMatcher findOverload = cxxConstructorDecl( hasParameter(0, ForwardingRefParm), unless(hasAnyParameter( // No warning: enable_if as constructor parameter. parmVarDecl(hasType(isEnableIf())))), unless(hasParent(functionTemplateDecl(has(templateTypeParmDecl( // No warning: enable_if as type parameter. hasDefaultArgument(isEnableIf()))))))) .bind("ctor"); Finder->addMatcher(findOverload, this); }
void NonPrivateMemberVariablesInClassesCheck::registerMatchers( MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; // We can ignore structs/classes with all member variables being public. auto ShouldIgnoreRecord = allOf(boolean(IgnoreClassesWithAllMemberVariablesBeingPublic), unless(hasNonPublicMemberVariable())); // There are three visibility types: public, protected, private. // If we are ok with public fields, then we only want to complain about // protected fields, else we want to complain about all non-private fields. // We can ignore public member variables in structs/classes, in unions. auto InterestingField = fieldDecl( IgnorePublicMemberVariables ? isProtected() : unless(isPrivate())); // We only want the records that not only contain the mutable data (non-static // member variables), but also have some logic (non-static member functions). // We may optionally ignore records where all the member variables are public. Finder->addMatcher(cxxRecordDecl(anyOf(isStruct(), isClass()), hasMethods(), hasNonStaticMethod(), unless(ShouldIgnoreRecord), forEach(InterestingField.bind("field"))) .bind("record"), this); }
void MultiwayPathsCoveredCheck::registerMatchers(MatchFinder *Finder) { Finder->addMatcher( switchStmt( hasCondition(allOf( // Match on switch statements that have either a bit-field or // an integer condition. The ordering in 'anyOf()' is // important because the last condition is the most general. anyOf(ignoringImpCasts(memberExpr(hasDeclaration( fieldDecl(isBitField()).bind("bitfield")))), ignoringImpCasts(declRefExpr().bind("non-enum-condition"))), // 'unless()' must be the last match here and must be bound, // otherwise the matcher does not work correctly, because it // will not explicitly ignore enum conditions. unless(ignoringImpCasts( declRefExpr(hasType(enumType())).bind("enum-condition")))))) .bind("switch"), this); // This option is noisy, therefore matching is configurable. if (WarnOnMissingElse) { Finder->addMatcher( ifStmt(allOf(hasParent(ifStmt()), unless(hasElse(anything())))) .bind("else-if"), this); } }
void NoexceptMoveConstructorCheck::registerMatchers(MatchFinder *Finder) { Finder->addMatcher( methodDecl(anyOf(constructorDecl(), hasOverloadedOperatorName("=")), unless(isImplicit()), unless(isDeleted())) .bind("decl"), this); }
void RedundantVoidArgCheck::registerMatchers(MatchFinder *Finder) { Finder->addMatcher(functionDecl(parameterCountIs(0), unless(isImplicit()), unless(isExternC())) .bind(FunctionId), this); Finder->addMatcher(typedefNameDecl().bind(TypedefId), this); auto ParenFunctionType = parenType(innerType(functionType())); auto PointerToFunctionType = pointee(ParenFunctionType); auto FunctionOrMemberPointer = anyOf(hasType(pointerType(PointerToFunctionType)), hasType(memberPointerType(PointerToFunctionType))); Finder->addMatcher(fieldDecl(FunctionOrMemberPointer).bind(FieldId), this); Finder->addMatcher(varDecl(FunctionOrMemberPointer).bind(VarId), this); auto CastDestinationIsFunction = hasDestinationType(pointsTo(ParenFunctionType)); Finder->addMatcher( cStyleCastExpr(CastDestinationIsFunction).bind(CStyleCastId), this); Finder->addMatcher( cxxStaticCastExpr(CastDestinationIsFunction).bind(NamedCastId), this); Finder->addMatcher( cxxReinterpretCastExpr(CastDestinationIsFunction).bind(NamedCastId), this); Finder->addMatcher( cxxConstCastExpr(CastDestinationIsFunction).bind(NamedCastId), this); Finder->addMatcher(lambdaExpr().bind(LambdaId), this); }
void AssignOperatorSignatureCheck::registerMatchers( ast_matchers::MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (getLangOpts().CPlusPlus) { const auto HasGoodReturnType = methodDecl(returns(lValueReferenceType( pointee(unless(isConstQualified()), hasDeclaration(equalsBoundNode("class")))))); const auto IsSelf = qualType(anyOf( hasDeclaration(equalsBoundNode("class")), referenceType(pointee(hasDeclaration(equalsBoundNode("class")))))); const auto IsSelfAssign = methodDecl(unless(anyOf(isDeleted(), isPrivate(), isImplicit())), hasName("operator="), ofClass(recordDecl().bind("class")), hasParameter(0, parmVarDecl(hasType(IsSelf)))) .bind("method"); Finder->addMatcher( methodDecl(IsSelfAssign, unless(HasGoodReturnType)).bind("ReturnType"), this); const auto BadSelf = referenceType( anyOf(lValueReferenceType(pointee(unless(isConstQualified()))), rValueReferenceType(pointee(isConstQualified())))); Finder->addMatcher( methodDecl(IsSelfAssign, hasParameter(0, parmVarDecl(hasType(BadSelf)))) .bind("ArgumentType"), this); Finder->addMatcher(methodDecl(IsSelfAssign, isConst()).bind("Const"), this); } }
void UseUncaughtExceptionsCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus17) return; std::string MatchText = "::std::uncaught_exception"; // Using declaration: warning and fix-it. Finder->addMatcher( usingDecl(hasAnyUsingShadowDecl(hasTargetDecl(hasName(MatchText)))) .bind("using_decl"), this); // DeclRefExpr: warning, no fix-it. Finder->addMatcher(declRefExpr(allOf(to(functionDecl(hasName(MatchText))), unless(callExpr()))) .bind("decl_ref_expr"), this); // CallExpr: warning, fix-it. Finder->addMatcher( callExpr(allOf(hasDeclaration(functionDecl(hasName(MatchText))), unless(hasAncestor(initListExpr())))) .bind("call_expr"), this); // CallExpr in initialisation list: warning, fix-it with avoiding narrowing // conversions. Finder->addMatcher( callExpr(allOf(hasAncestor(initListExpr()), hasDeclaration(functionDecl(hasName(MatchText))))) .bind("init_call_expr"), this); }
void SuspiciousEnumUsageCheck::registerMatchers(MatchFinder *Finder) { const auto enumExpr = [](StringRef RefName, StringRef DeclName) { return allOf(ignoringImpCasts(expr().bind(RefName)), ignoringImpCasts(hasType(enumDecl().bind(DeclName)))); }; Finder->addMatcher( binaryOperator(hasOperatorName("|"), hasLHS(enumExpr("", "enumDecl")), hasRHS(allOf(enumExpr("", "otherEnumDecl"), ignoringImpCasts(hasType(enumDecl( unless(equalsBoundNode("enumDecl")))))))) .bind("diffEnumOp"), this); Finder->addMatcher( binaryOperator(anyOf(hasOperatorName("+"), hasOperatorName("|")), hasLHS(enumExpr("lhsExpr", "enumDecl")), hasRHS(allOf(enumExpr("rhsExpr", ""), ignoringImpCasts(hasType(enumDecl( equalsBoundNode("enumDecl"))))))), this); Finder->addMatcher( binaryOperator(anyOf(hasOperatorName("+"), hasOperatorName("|")), hasEitherOperand( allOf(hasType(isInteger()), unless(enumExpr("", "")))), hasEitherOperand(enumExpr("enumExpr", "enumDecl"))), this); Finder->addMatcher( binaryOperator(anyOf(hasOperatorName("|="), hasOperatorName("+=")), hasRHS(enumExpr("enumExpr", "enumDecl"))), this); }
void UseEqualsDeleteCheck::registerMatchers(MatchFinder *Finder) { auto PrivateSpecialFn = cxxMethodDecl( isPrivate(), anyOf(cxxConstructorDecl(anyOf(isDefaultConstructor(), isCopyConstructor(), isMoveConstructor())), cxxMethodDecl( anyOf(isCopyAssignmentOperator(), isMoveAssignmentOperator())), cxxDestructorDecl())); Finder->addMatcher( cxxMethodDecl( PrivateSpecialFn, unless(anyOf(hasBody(stmt()), isDefaulted(), isDeleted(), ast_matchers::isTemplateInstantiation(), // Ensure that all methods except private special member // functions are defined. hasParent(cxxRecordDecl(hasMethod(unless( anyOf(PrivateSpecialFn, hasBody(stmt()), isPure(), isDefaulted(), isDeleted())))))))) .bind(SpecialFunction), this); Finder->addMatcher( cxxMethodDecl(isDeleted(), unless(isPublic())).bind(DeletedNotPublic), this); }
void NonConstReferences::registerMatchers(MatchFinder *Finder) { Finder->addMatcher( parmVarDecl( unless(isInstantiated()), hasType(references( qualType(unless(isConstQualified())).bind("referenced_type"))), unless(hasType(rValueReferenceType()))) .bind("param"), this); }
void FunctionSizeCheck::registerMatchers(MatchFinder *Finder) { Finder->addMatcher( functionDecl( unless(isInstantiated()), forEachDescendant( stmt(unless(compoundStmt()), hasParent(stmt(anyOf(compoundStmt(), ifStmt(), anyOf(whileStmt(), doStmt(), forRangeStmt(), forStmt()))))) .bind("stmt"))).bind("func"), this); }
void AvoidCStyleCastsCheck::registerMatchers(ast_matchers::MatchFinder *Finder) { Finder->addMatcher( cStyleCastExpr( // Filter out (EnumType)IntegerLiteral construct, which is generated // for non-type template arguments of enum types. // FIXME: Remove this once this is fixed in the AST. unless(hasParent(substNonTypeTemplateParmExpr())), // Avoid matches in template instantiations. unless(isInTemplateInstantiation())).bind("cast"), this); }
void UnnecessaryValueParamCheck::registerMatchers(MatchFinder *Finder) { const auto ExpensiveValueParamDecl = parmVarDecl(hasType(hasCanonicalType(allOf(matchers::isExpensiveToCopy(), unless(referenceType())))), decl().bind("param")); Finder->addMatcher( functionDecl(isDefinition(), unless(cxxMethodDecl(isOverride())), unless(isInstantiated()), has(typeLoc(forEach(ExpensiveValueParamDecl))), decl().bind("functionDecl")), this); }
void NoexceptMoveConstructorCheck::registerMatchers(MatchFinder *Finder) { // Only register the matchers for C++11; the functionality currently does not // provide any benefit to other languages, despite being benign. if (!getLangOpts().CPlusPlus11) return; Finder->addMatcher( cxxMethodDecl(anyOf(cxxConstructorDecl(), hasOverloadedOperatorName("=")), unless(isImplicit()), unless(isDeleted())) .bind("decl"), this); }
void UnconventionalAssignOperatorCheck::registerMatchers( ast_matchers::MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (!getLangOpts().CPlusPlus) return; const auto HasGoodReturnType = cxxMethodDecl(returns(lValueReferenceType( pointee(unless(isConstQualified()), anyOf(autoType(), hasDeclaration(equalsBoundNode("class"))))))); const auto IsSelf = qualType( anyOf(hasDeclaration(equalsBoundNode("class")), referenceType(pointee(hasDeclaration(equalsBoundNode("class")))))); const auto IsAssign = cxxMethodDecl(unless(anyOf(isDeleted(), isPrivate(), isImplicit())), hasName("operator="), ofClass(recordDecl().bind("class"))) .bind("method"); const auto IsSelfAssign = cxxMethodDecl(IsAssign, hasParameter(0, parmVarDecl(hasType(IsSelf)))) .bind("method"); Finder->addMatcher( cxxMethodDecl(IsAssign, unless(HasGoodReturnType)).bind("ReturnType"), this); const auto BadSelf = referenceType( anyOf(lValueReferenceType(pointee(unless(isConstQualified()))), rValueReferenceType(pointee(isConstQualified())))); Finder->addMatcher( cxxMethodDecl(IsSelfAssign, hasParameter(0, parmVarDecl(hasType(BadSelf)))) .bind("ArgumentType"), this); Finder->addMatcher( cxxMethodDecl(IsSelfAssign, anyOf(isConst(), isVirtual())).bind("cv"), this); const auto IsBadReturnStatement = returnStmt(unless(has(ignoringParenImpCasts( anyOf(unaryOperator(hasOperatorName("*"), hasUnaryOperand(cxxThisExpr())), cxxOperatorCallExpr(argumentCountIs(1), callee(unresolvedLookupExpr()), hasArgument(0, cxxThisExpr()))))))); const auto IsGoodAssign = cxxMethodDecl(IsAssign, HasGoodReturnType); Finder->addMatcher(returnStmt(IsBadReturnStatement, forFunction(IsGoodAssign)) .bind("returnStmt"), this); }
void ExceptionBaseclassCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; Finder->addMatcher( cxxThrowExpr(allOf(has(expr(unless(hasType(qualType(hasCanonicalType( hasDeclaration(cxxRecordDecl(isSameOrDerivedFrom( hasName("std::exception")))))))))), has(expr(unless(cxxUnresolvedConstructExpr()))), eachOf(has(expr(hasType(namedDecl().bind("decl")))), anything()))) .bind("bad_throw"), this); }
/*{{{ start link threads */ static void start_link_threads(int index, char *argv) { int linkno, channel; unless (sscanf(argv, "%d.%d", &linkno, &channel) == 2) Fatal("invalid link specification %s", argv); NumberThreads++; unless(Fork(StackSize, &link_receiver, 3 * sizeof(int), index, linkno, channel)) Fatal("out of memory starting receiver for link %d", linkno); NumberThreads++; unless(Fork(StackSize, &link_sender, 3 * sizeof(int), index, linkno, channel+1)) Fatal("out of memory starting sender for link %d", linkno); }
void InefficientAlgorithmCheck::registerMatchers(MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (!getLangOpts().CPlusPlus) return; const std::string Algorithms = "^::std::(find|count|equal_range|lower_bound|upper_bound)$"; const auto ContainerMatcher = classTemplateSpecializationDecl( matchesName("^::std::(unordered_)?(multi)?(set|map)$")); const auto Matcher = callExpr( callee(functionDecl(matchesName(Algorithms))), hasArgument( 0, constructExpr(has(memberCallExpr( callee(methodDecl(hasName("begin"))), on(declRefExpr( hasDeclaration(decl().bind("IneffContObj")), anyOf(hasType(ContainerMatcher.bind("IneffCont")), hasType(pointsTo( ContainerMatcher.bind("IneffContPtr"))))) .bind("IneffContExpr")))))), hasArgument(1, constructExpr(has(memberCallExpr( callee(methodDecl(hasName("end"))), on(declRefExpr(hasDeclaration( equalsBoundNode("IneffContObj")))))))), hasArgument(2, expr().bind("AlgParam")), unless(isInTemplateInstantiation())) .bind("IneffAlg"); Finder->addMatcher(Matcher, this); }
void ExplicitConstructorCheck::registerMatchers(MatchFinder *Finder) { // Only register the matchers for C++; the functionality currently does not // provide any benefit to other languages, despite being benign. if (getLangOpts().CPlusPlus) Finder->addMatcher( cxxConstructorDecl(unless(isInstantiated())).bind("ctor"), this); }
void ProBoundsArrayToPointerDecayCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; // The only allowed array to pointer decay // 1) just before array subscription // 2) inside a range-for over an array // 3) if it converts a string literal to a pointer Finder->addMatcher( implicitCastExpr(unless(hasParent(arraySubscriptExpr())), unless(hasParentIgnoringImpCasts(explicitCastExpr())), unless(isInsideOfRangeBeginEndStmt()), unless(hasSourceExpression(stringLiteral()))) .bind("cast"), this); }
void ShrinkToFitCheck::registerMatchers(MatchFinder *Finder) { // Swap as a function need not to be considered, because rvalue can not // be bound to a non-const reference. const auto ShrinkableAsMember = memberExpr(member(valueDecl().bind("ContainerDecl"))); const auto ShrinkableAsDecl = declRefExpr(hasDeclaration(valueDecl().bind("ContainerDecl"))); const auto CopyCtorCall = constructExpr( hasArgument(0, anyOf(ShrinkableAsMember, ShrinkableAsDecl, unaryOperator(has(ShrinkableAsMember)), unaryOperator(has(ShrinkableAsDecl))))); const auto SwapParam = expr(anyOf( memberExpr(member(equalsBoundNode("ContainerDecl"))), declRefExpr(hasDeclaration(equalsBoundNode("ContainerDecl"))), unaryOperator(has(memberExpr(member(equalsBoundNode("ContainerDecl"))))), unaryOperator( has(declRefExpr(hasDeclaration(equalsBoundNode("ContainerDecl"))))))); Finder->addMatcher( memberCallExpr(on(hasType(namedDecl(stlShrinkableContainer()))), callee(methodDecl(hasName("swap"))), has(memberExpr(hasDescendant(CopyCtorCall))), hasArgument(0, SwapParam.bind("ContainerToShrink")), unless(isInTemplateInstantiation())) .bind("CopyAndSwapTrick"), this); }
void ProBoundsPointerArithmeticCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; // Flag all operators +, -, +=, -=, ++, -- that result in a pointer Finder->addMatcher( binaryOperator( anyOf(hasOperatorName("+"), hasOperatorName("-"), hasOperatorName("+="), hasOperatorName("-=")), hasType(pointerType()), unless(hasLHS(ignoringImpCasts(declRefExpr(to(isImplicit())))))) .bind("expr"), this); Finder->addMatcher( unaryOperator(anyOf(hasOperatorName("++"), hasOperatorName("--")), hasType(pointerType())) .bind("expr"), this); // Array subscript on a pointer (not an array) is also pointer arithmetic Finder->addMatcher( arraySubscriptExpr( hasBase(ignoringImpCasts( anyOf(hasType(pointerType()), hasType(decayedType(hasDecayedType(pointerType()))))))) .bind("expr"), this); }
void FasterStringFindCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; const auto SingleChar = expr(ignoringParenCasts(stringLiteral(hasSize(1)).bind("literal"))); const auto StringFindFunctions = anyOf(hasName("find"), hasName("rfind"), hasName("find_first_of"), hasName("find_first_not_of"), hasName("find_last_of"), hasName("find_last_not_of")); llvm::Optional<ast_matchers::internal::Matcher<NamedDecl>> IsStringClass; for (const auto &ClassName : StringLikeClasses) { const auto HasName = hasName(ClassName); IsStringClass = IsStringClass ? anyOf(*IsStringClass, HasName) : HasName; } if (IsStringClass) { Finder->addMatcher( cxxMemberCallExpr( callee(functionDecl(StringFindFunctions).bind("func")), anyOf(argumentCountIs(1), argumentCountIs(2)), hasArgument(0, SingleChar), on(expr(hasType(recordDecl(*IsStringClass)), unless(hasSubstitutedType())))), this); } }
void UseNodiscardCheck::registerMatchers(MatchFinder *Finder) { // If we use ``[[nodiscard]]`` attribute, we require at least C++17. Use a // macro or ``__attribute__`` with pre c++17 compilers by using // ReplacementString option. if ((NoDiscardMacro == "[[nodiscard]]" && !getLangOpts().CPlusPlus17) || !getLangOpts().CPlusPlus) return; auto FunctionObj = cxxRecordDecl(hasAnyName("::std::function", "::boost::function")); // Find all non-void const methods which have not already been marked to // warn on unused result. Finder->addMatcher( cxxMethodDecl( allOf(isConst(), isDefinitionOrInline(), unless(anyOf( returns(voidType()), isNoReturn(), isOverloadedOperator(), isVariadic(), hasTemplateReturnType(), hasClassMutableFields(), isConversionOperator(), hasAttr(clang::attr::WarnUnusedResult), hasType(isInstantiationDependentType()), hasAnyParameter(anyOf( parmVarDecl(anyOf(hasType(FunctionObj), hasType(references(FunctionObj)))), hasType(isNonConstReferenceOrPointer()), hasParameterPack())))))) .bind("no_discard"), this); }
void ProTypeCstyleCastCheck::registerMatchers(MatchFinder *Finder) { if (!getLangOpts().CPlusPlus) return; Finder->addMatcher( cStyleCastExpr(unless(isInTemplateInstantiation())).bind("cast"), this); }