IOS 警告 汇总

Semantic Warnings

WarningMessage-WCFString-literalinput conversion stopped due to an input byte that does not belong to the input codeset UTF-8-WNSObject-attribute__attribute ((NSObject)) may be put on a typedef only, attribute is ignored-Wabstract-vbase-initinitializer for virtual base class %0 of abstract class %1 will never be used-Waddress-of-array-temporarypointer is initialized by a temporary array, which will be destroyed at the end of the full-expression-Warc-maybe-repeated-use-of-weak"weak %select{variable|property|implicit property|instance variable}0 %1 may be accessed multiple times in this %select{function|method|block|lambda}2 and may be unpredictably set to nil assign to a strong variable to keep the object alive-Warc-non-pod-memaccess%select{destination for|source of}0 this %1 call is a pointer to ownership-qualified type %2-Warc-performSelector-leaksperformSelector may cause a leak because its selector is unknown-Warc-repeated-use-of-weak"weak %select{variable|property|implicit property|instance variable}0 %1 is accessed multiple times in this %select{function|method|block|lambda}2 but may be unpredictably set to nil assign to a strong variable to keep the object alive-Warc-retain-cyclescapturing %0 strongly in this block is likely to lead to a retain cycle-Warc-unsafe-retained-assignassigning retained object to unsafe property object will be released after assignment-Warc-unsafe-retained-assignassigning %select{array literal|dictionary literal|numeric literal|boxed expression|should not happen|block literal}0 to a weak %select{property|variable}1 object will be released after assignment-Warc-unsafe-retained-assignassigning retained object to %select{weak|unsafe_unretained}0 %select{property|variable}1 object will be released after assignment-Warray-boundsarray index %0 is past the end of the array (which contains %1 element%s2)-Warray-boundsarray index %0 is before the beginning of the array-Warray-bounds'static' has no effect on zero-length arrays-Warray-boundsarray argument is too small contains %0 elements, callee requires at least %1-Warray-bounds-pointer-arithmeticthe pointer incremented by %0 refers past the end of the array (that contains %1 element%s2)-Warray-bounds-pointer-arithmeticthe pointer decremented by %0 refers before the beginning of the array-Wassign-enuminteger constant not in range of enumerated type %0-Watomic-property-with-user-defined-accessorwritable atomic property %0 cannot pair a synthesized %select{getter|setter}1 with a user defined %select{getter|setter}2-Wattributesunknown attribute %0 ignored-Wauto-var-id'auto' deduced as 'id' in declaration of %0-Wavailabilityunknown platform %0 in availability macro-Wavailabilityoverriding method %select{introduced after|deprecated before|obsoleted before}0 overridden method on %1 (%2 vs. %3)-Wavailabilityavailability does not match previous declaration-Wavailabilityoverriding method cannot be unavailable on %0 when its overridden method is available-Wavailabilityfeature cannot be %select{introduced|deprecated|obsoleted}0 in %1 version %2 before it was %select{introduced|deprecated|obsoleted}3 in version %4 attribute ignored-Wbad-function-castcast from function call of type %0 to non-matching type %1-Wbitfield-constant-conversionimplicit truncation from %2 to bitfield changes value from %0 to %1-Wbitwise-op-parentheses'&' within '|'-Wbool-conversion"initialization of pointer of type %0 to null from a constant boolean " "expression-Wbridge-cast%0 cannot bridge to %1-Wbridge-cast%0 bridges to %1, not %2-Wbuiltin-requires-headerdeclaration of built-in function '%0' requires inclusion of the header stdio.h-Wbuiltin-requires-headerdeclaration of built-in function '%0' requires inclusion of the header setjmp.h-Wbuiltin-requires-headerdeclaration of built-in function '%0' requires inclusion of the header ucontext.h-Wc++-compat%select{|empty }0%select{struct|union}1 has size 0 in C, %select{size 1|non-zero size}2 in C++-Wc++11-compatexplicit instantiation cannot be 'inline'-Wc++11-compatexplicit instantiation of %0 must occur at global scope-Wc++11-compatexplicit instantiation of %0 not in a namespace enclosing %1-Wc++11-compatexplicit instantiation of %q0 must occur in namespace %1-Wc++11-narrowingconstant expression evaluates to %0 which cannot be narrowed to type %1 in C++11-Wc++11-narrowingtype %0 cannot be narrowed to %1 in initializer list in C++11-Wc++11-narrowingnon-constant-expression cannot be narrowed from type %0 to %1 in initializer list in C++11-Wc++98-c++11-compattype definition in a constexpr %select{function|constructor}0 is incompatible with C++ standards before C++1y-Wc++98-c++11-compatuse of this statement in a constexpr %select{function|constructor}0 is incompatible with C++ standards before C++1y-Wc++98-c++11-compatinit-captures.def warn_cxx11_compat_init_capture : Warning "initialized lambda captures are incompatible with C++ standards " "before C++1y-Wc++98-c++11-compatvariable declaration in a constexpr %select{function|constructor}0 is incompatible with C++ standards before C++1y-Wc++98-c++11-compatconstexpr function with no return statements is incompatible with C++ standards before C++1y-Wc++98-c++11-compatmultiple return statements in constexpr function is incompatible with C++ standards before C++1y-Wc++98-c++11-compatvariable templates are incompatible with C++ standards before C++1y-Wc++98-compatsubstitution failure due to access control is incompatible with C++98-Wc++98-compat%select{anonymous struct|union}0 member %1 with a non-trivial %select{constructor|copy constructor|move constructor|copy assignment operator|move assignment operator|destructor}2 is incompatible with C++98-Wc++98-compatenumeration type in nested name specifier is incompatible with C++98-Wc++98-compatstatic data member %0 in union is incompatible with C++98-Wc++98-compatdefault template arguments for a function template are incompatible with C++98-Wc++98-compatscalar initialized from empty initializer list is incompatible with C++98-Wc++98-compatbefriending %1 without '%select{struct|interface|union|class|enum}0' keyword is incompatible with C++98-Wc++98-compatuse of null pointer as non-type template argument is incompatible with C++98-Wc++98-compatfriend declaration naming a member of the declaring class is incompatible with C++98-Wc++98-compatnon-class friend type %0 is incompatible with C++98-Wc++98-compatbefriending enumeration type %0 is incompatible with C++98-Wc++98-compatuse of non-static data member %0 in an unevaluated context is incompatible with C++98-Wc++98-compatfriend function %0 would be implicitly redefined in C++98-Wc++98-compat%select{class template|class template partial|variable template|variable template partial|function template|member function|static data member|member class|member enumeration}0 specialization of %1 outside namespace %2 is incompatible with C++98-Wc++98-compatreference initialized from initializer list is incompatible with C++98-Wc++98-compatredundant parentheses surrounding address non-type template argument are incompatible with C++98-Wc++98-compatinitialization of initializer_list object is incompatible with C++98-Wc++98-compatuse of 'template' keyword outside of a template is incompatible with C++98-Wc++98-compatnon-type template argument referring to %select{function|object}0 %1 with internal linkage is incompatible with C++98-Wc++98-compatuse of 'typename' outside of a template is incompatible with C++98-Wc++98-compatpassing object of trivial but non-POD type %0 through variadic %select{function|block|method|constructor}1 is incompatible with C++98-Wc++98-compatgoto would jump into protected scope in C++98-Wc++98-compatconstructor call from initializer list is incompatible with C++98-Wc++98-compat'auto' type specifier is incompatible with C++98-Wc++98-compatdelegating constructors are incompatible with C++98-Wc++98-compat'constexpr' specifier is incompatible with C++98-Wc++98-compatinheriting constructors are incompatible with C++98-Wc++98-compatexplicit conversion functions are incompatible with C++98-Wc++98-compatswitch case would be in a protected scope in C++98-Wc++98-compat'%0' type specifier is incompatible with C++98-Wc++98-compatindirect goto might cross protected scopes in C++98-Wc++98-compat-pedanticcast between pointer-to-function and pointer-to-object is incompatible with C++98-Wc++98-compat-pedanticimplicit conversion from array size expression of type %0 to %select{integral|enumeration}1 type %2 is incompatible with C++98-Wcast-aligncast from %0 to %1 increases required alignment from %2 to %3-Wcast-of-sel-typecast of type %0 to %1 is deprecated use sel_getName instead-Wchar-subscriptsarray subscript is of type 'char'-Wconditional-uninitializedvariable %0 may be uninitialized when %select{used here|captured by block}1-Wconstant-logical-operanduse of logical '%0' with constant operand-Wconstexpr-not-const'constexpr' non-static member function will not be implicitly 'const' in C++1y add 'const' to avoid a change in behavior-Wconsumedstate of variable '%0' must match at the entry and exit of loop-Wconsumedparameter '%0' not in expected state when the function returns: expected '%1', observed '%2'-Wconsumedargument not in expected state expected '%0', observed '%1'-Wconsumedinvalid invocation of method '%0' on a temporary object while it is in the '%1' state-Wconsumedreturn state set for an unconsumable type '%0'-Wconsumedconsumed analysis attribute is attached to member of class '%0' which isn't marked as consumable-Wconsumedinvalid invocation of method '%0' on object '%1' while it is in the '%2' state-Wconsumedreturn value not in expected state expected '%0', observed '%1'-Wconversionimplicit conversion discards imaginary component: %0 to %1-Wconversionnon-type template argument with value '%0' converted to '%1' for unsigned template parameter of type %2-Wconversionimplicit conversion loses floating-point precision: %0 to %1-Wconversionimplicit conversion loses integer precision: %0 to %1-Wconversionnon-type template argument value '%0' truncated to '%1' for template parameter of type %2-Wconversionimplicit conversion turns vector to scalar: %0 to %1-Wconversionimplicit conversion turns floating-point number into integer: %0 to %1-Wcovered-switch-defaultdefault label in switch which covers all enumeration values-Wcustom-atomic-propertiesatomic by default property %0 has a user defined %select{getter|setter}1 (property should be marked 'atomic' if this is intended)-Wdangling-fieldinitializing pointer member %0 with the stack address of parameter %1-Wdangling-fieldbinding reference %select{|subobject of }1member %0 to a temporary value-Wdangling-fieldbinding reference member %0 to stack allocated parameter %1-Wdangling-initializer-listarray backing the initializer list will be destroyed at the end of %select{the full-expression|the constructor}0-Wdelete-incompletedeleting pointer to incomplete type %0 may cause undefined behavior-Wdelete-non-virtual-dtordelete called on %0 that is abstract but has non-virtual destructor-Wdelete-non-virtual-dtordelete called on %0 that has virtual functions but non-virtual destructor-Wdeprecatedaccess declarations are deprecated use using declarations instead-Wdeprecateddefinition of implicit copy %select{constructor|assignment operator}1 for %0 is deprecated because it has a user-declared %select{copy %select{assignment operator|constructor}1|destructor}2-Wdeprecateddynamic exception specifications are deprecated-Wdeprecated-increment-boolincrementing expression of type bool is deprecated-Wdeprecated-objc-isa-usageassignment to Objective-C's isa is deprecated in favor of object_setClass()-Wdeprecated-objc-isa-usagedirect access to Objective-C's isa is deprecated in favor of object_getClass()-Wdeprecated-objc-pointer-introspectionbitmasking for introspection of Objective-C object pointers is strongly discouraged-Wdeprecated-objc-pointer-introspection-performSelectorwarn_objc_pointer_masking.Text-Wdeprecated-writable-stringsdummy warning to enable -fconst-strings-Wdirect-ivar-accessinstance variable %0 is being directly accessed-Wdistributed-object-modifiersconflicting distributed object modifiers on return type in implementation of %0-Wdistributed-object-modifiersconflicting distributed object modifiers on parameter type in implementation of %0-Wdivision-by-zerodivision by zero is undefined-Wdivision-by-zeroremainder by zero is undefined-Wdocumentationparameter '%0' not found in the function declaration-Wdocumentationnot a Doxygen trailing comment-Wduplicate-enumelement %0 has been implicitly assigned %1 which another element has been assigned-Wduplicate-method-matchmultiple declarations of method %0 found and ignored-Wdynamic-class-memaccess%select{destination for|source of|first operand of|second operand of}0 this %1 call is a pointer to dynamic class %2 vtable pointer will be %select{overwritten|copied|moved|compared}3-Wempty-bodyswitch statement has empty body-Wempty-bodyfor loop has empty body-Wempty-bodyif statement has empty body-Wempty-bodyrange-based for loop has empty body-Wempty-bodywhile loop has empty body-Wenum-comparecomparison of two values with different enumeration types%diff{ ($ and $)|}0,1-Wenum-conversionimplicit conversion from enumeration type %0 to different enumeration type %1-Wexit-time-destructorsdeclaration requires an exit-time destructor-Wexplicit-ownership-typemethod parameter of type %0 with no explicit ownership-Wextern-c-compat%select{|empty }0%select{struct|union}1 has size 0 in C, %select{size 1|non-zero size}2 in C++-Wextern-initializer'extern' variable has an initializer-Wfloat-equalcomparing floating point with == or != is unsafe-Wformat"data argument position '%0' exceeds the number of data arguments (%1)-Wformatposition arguments in format strings start counting at 1 (not 0)-Wformatinvalid position specified for %select{field width|field precision}0-Wformatcannot mix positional and non-positional arguments in format string-Wformatvalues of type '%0' should not be used as format arguments add an explicit cast to %1 instead-Wformatformat specifies type %0 but the argument has type %1-Wformatzero field width in scanf format string is unused-Wformatno closing ']' for '%%[' in scanf format string-Wformatformat string should not be a wide string-Wformatformat string contains '\\0' within the string body-Wformat'%select{*|.*}0' specified field %select{width|precision}0 is missing a matching 'int' argument-Wformatfield %select{width|precision}0 should have type %1, but argument has type %2-Wformat%select{field width|precision}0 used with '%1' conversion specifier, resulting in undefined behavior-Wformatformat string missing-Wformatincomplete format specifier-Wformatflag '%0' results in undefined behavior with '%1' conversion specifier-Wformatflag '%0' is ignored when flag '%1' is present-Wformatmore '%%' conversions than data arguments-Wformatlength modifier '%0' results in undefined behavior or no effect with '%1' conversion specifier-Wformat-extra-argsdata argument not used by format string-Wformat-invalid-specifierinvalid conversion specifier '%0'-Wformat-nonliteralformat string is not a string literal-Wformat-securityformat string is not a string literal (potentially insecure)-Wformat-zero-lengthformat string is empty-Wgcc-compatGCC does not allow the 'cleanup' attribute argument to be anything other than a simple identifier-Wglobal-constructorsdeclaration requires a global constructor-Wglobal-constructorsdeclaration requires a global destructor-Wgnu-conditional-omitted-operanduse of GNU ?: conditional expression extension, omitting middle operand-Wheader-hygieneusing namespace directive in global context in header-Widiomatic-parenthesesusing the result of an assignment as a condition without parentheses-Wignored-attributes'malloc' attribute only applies to functions returning a pointer type-Wignored-attributes%0 attribute only applies to %select{functions|unions|variables and functions|functions and methods|parameters|functions, methods and blocks|functions, methods, and classes|functions, methods, and parameters|classes|variables|methods|variables, functions and labels|fields and global variables|structs|variables, functions and tag types|thread-local variables|variables and fields|variables, data members and tag types|types and namespaces|Objective-C interfaces}1-Wignored-attributes'%0' attribute cannot be specified on a definition-Wignored-attributes__weak attribute cannot be specified on an automatic variable when ARC is not enabled-Wignored-attributesObjective-C GC does not allow weak variables on the stack-Wignored-attributes__weak attribute cannot be specified on a field declaration-Wignored-attributesattribute %0 cannot be applied to %select{functions|Objective-C method}1 without return value-Wignored-attributesattribute declaration must precede definition-Wignored-attributesattribute %0 is ignored, place it after \"%select{class|struct|union|interface|enum}1\" to apply attribute to type declaration-Wignored-attributes__declspec attribute %0 is not supported-Wignored-attributesattribute %0 ignored, because it cannot be applied to a type-Wignored-attributesattribute %0 after definition is ignored-Wignored-attributes%0 attribute ignored-Wignored-attributes'sentinel' attribute only supported for variadic %select{functions|blocks}0-Wignored-attributes'sentinel' attribute requires named arguments-Wignored-attributes'%0' only applies to %select{function|pointer|Objective-C object or block pointer}1 types type here is %2-Wignored-attributes'nonnull' attribute applied to function with no pointer arguments-Wignored-attributes%0 attribute can only be applied to instance variables or properties-Wignored-attributesunknown visibility %0-Wignored-attributes%0 calling convention ignored on variadic function-Wignored-attributes%0 only applies to variables with static storage duration and functions-Wignored-attributesibaction attribute can only be applied to Objective-C instance methods-Wignored-attributes#pramga ms_struct can not be used with dynamic classes or structures-Wignored-attributestransparent union definition must contain at least one field transparent_union attribute ignored-Wignored-attributesfirst field of a transparent union cannot have %select{floating point|vector}0 type %1 transparent_union attribute ignored-Wignored-attributes'gnu_inline' attribute requires function to be marked 'inline', attribute ignored-Wignored-attributescalling convention %0 ignored for this target-Wignored-attributestransparent_union attribute can only be applied to a union definition attribute ignored-Wignored-attributes%select{alignment|size}0 of field %1 (%2 bits) does not match the %select{alignment|size}0 of the first field in transparent union transparent_union attribute ignored-Wignored-attributesattribute %0 is already applied-Wignored-attributes%0 attribute ignored for field of type %1-Wignored-attributes%0 attribute ignored when parsing type-Wignored-attributes%0 attribute only applies to %select{functions|methods|properties}1 that return %select{an Objective-C object|a pointer|a non-retainable pointer}2-Wignored-attributes%0 attribute only applies to %select{Objective-C object|pointer}1 parameters-Wignored-attributesattribute %0 is already applied with different parameters-Wignored-attributes%0 attribute argument not supported: %1-Wignored-qualifiers"'%0' type qualifier%s1 on return type %plural{1:has|:have}1 no effect-Wignored-qualifiersARC %select{unused|__unsafe_unretained|__strong|__weak|__autoreleasing}0 lifetime qualifier on return type is ignored-Wimplicit-atomic-propertiesproperty is assumed atomic by default-Wimplicit-atomic-propertiesproperty is assumed atomic when auto-synthesizing the property-Wimplicit-fallthroughfallthrough annotation in unreachable code-Wimplicit-fallthroughunannotated fall-through between switch labels-Wimplicit-fallthroughfallthrough annotation does not directly precede switch label-Wimplicit-function-declarationimplicit declaration of function %0-Wimplicit-function-declarationuse of unknown builtin %0-Wimplicit-retain-self"block implicitly retains 'self' explicitly mention 'self' to indicate this is intended behavior-Wincompatible-library-redeclarationincompatible redeclaration of library function %0-Wincomplete-implementationmethod definition for %0 not found-Winherited-variadic-ctorinheriting constructor does not inherit ellipsis-Winitializer-overridessubobject initialization overrides initialization of other fields within its enclosing subobject-Winitializer-overridesinitializer overrides prior initialization of this subobject-Wint-to-pointer-castcast to %1 from smaller integer type %0-Wint-to-void-pointer-castcast to %1 from smaller integer type %0-Winvalid-iboutletIBOutletCollection properties should be copy/strong and not assign-Winvalid-iboutlet%select{instance variable|property}2 with %0 attribute must be an object type (invalid %1)-Winvalid-noreturnfunction %0 declared 'noreturn' should not return-Winvalid-noreturnfunction declared 'noreturn' should not return-Wlarge-by-value-copyreturn value of %0 is a large (%1 bytes) pass-by-value object pass it by reference instead ?-Wlarge-by-value-copy%0 is a large (%1 bytes) pass-by-value argument pass it by reference instead ?-Wliteral-conversionimplicit conversion from %0 to %1 changes value from %2 to %3-Wliteral-rangemagnitude of floating-point constant too large for type %0 maximum is %1-Wliteral-rangemagnitude of floating-point constant too small for type %0 minimum is %1-Wlogical-not-parentheseslogical not is only applied to the left hand side of this comparison-Wlogical-op-parentheses'&&' within '||'-Wloop-analysisvariable%select{s| %1|s %1 and %2|s %1, %2, and %3|s %1, %2, %3, and %4}0 used in loop condition not modified in loop body-Wloop-analysisvariable %0 is %select{decremented|incremented}1 both in the loop header and in the loop body-Wmethod-signaturesconflicting parameter types in implementation of %0: %1 vs %2-Wmethod-signaturesconflicting return type in implementation of %0: %1 vs %2-Wmicrosoftextra qualification on member %0-Wmismatched-method-attributesattributes on method implementation and its declaration must match-Wmismatched-parameter-typesconflicting parameter types in implementation of %0%diff{: $ vs $|}1,2-Wmismatched-return-typesconflicting return type in implementation of %0%diff{: $ vs $|}1,2-Wmissing-bracessuggest braces around initialization of subobject-Wmissing-declarations'%0' ignored on this declaration-Wmissing-field-initializersmissing field '%0' initializer-Wmissing-method-return-typemethod has no return type specified defaults to 'id'-Wmissing-noreturnblock could be declared with attribute 'noreturn'-Wmissing-noreturn%select{function|method}0 %1 could be declared with attribute 'noreturn'-Wmissing-prototypesno previous prototype for function %0-Wmissing-variable-declarationsno previous extern declaration for non-static variable %0-Wmultiple-move-vbasedefaulted move assignment operator of %0 will move assign virtual base class %1 multiple times-Wnested-anon-typesanonymous types declared in an anonymous union/struct are an extension-Wnon-literal-null-conversion"expression which evaluates to zero treated as a null pointer constant of " "type %0-Wnon-pod-varargscannot pass object of %select{non-POD|non-trivial}0 type %1 through variadic %select{function|block|method|constructor}2 call will abort at runtime-Wnon-pod-varargscannot pass %select{non-POD|non-trivial}0 object of type %1 to variadic %select{function|block|method|constructor}2 expected type from format string was %3-Wnon-pod-varargssecond argument to 'va_arg' is of ARC ownership-qualified type %0-Wnon-pod-varargssecond argument to 'va_arg' is of non-POD type %0-Wnon-virtual-dtor%0 has virtual functions but non-virtual destructor-Wnonnullnull passed to a callee which requires a non-null argument-Wnull-arithmeticcomparison between NULL and non-pointer %select{(%1 and NULL)|(NULL and %1)}0-Wnull-arithmeticuse of NULL in arithmetic operation-Wnull-dereferenceindirection of non-volatile null pointer will be deleted, not trap-Wobjc-autosynthesis-property-ivar-name-matchautosynthesized property %0 will use %select{|synthesized}1 instance variable %2, not existing instance variable %3-Wobjc-forward-class-redefinitionredefinition of forward class %0 of a typedef name of an object type is ignored-Wobjc-interface-ivarsdeclaration of instance variables in the interface is deprecated-Wobjc-literal-comparedirect comparison of %select{an array literal|a dictionary literal|a numeric literal|a boxed expression|}0 has undefined behavior-Wobjc-literal-missing-atsignstring literal must be prefixed by '@'-Wobjc-method-accessclass method %objcclass0 not found (return type defaults to 'id')-Wobjc-method-accessinstance method %objcinstance0 not found (return type defaults to 'id')-Wobjc-method-accessinstance method %0 is being used on 'Class' which is not in the root class-Wobjc-method-accessinstance method %0 found instead of class method %1-Wobjc-method-accessclass method %objcclass0 not found (return type defaults to 'id') did you mean %objcclass2?-Wobjc-method-accessinstance method %objcinstance0 not found (return type defaults to 'id') did you mean %objcinstance2?-Wobjc-missing-property-synthesis"auto property synthesis is synthesizing property not explicitly synthesized-Wobjc-missing-super-callsmethod possibly missing a [super %0] call-Wobjc-noncopy-retain-block-property"retain'ed block property does not copy the block " "- use copy attribute instead-Wobjc-nonunified-exceptionscan not catch an exception thrown with @throw in C++ in the non-unified exception model-Wobjc-property-implementationproperty %0 requires method %1 to be defined - use @synthesize, @dynamic or provide a method implementation in this class implementation-Wobjc-property-implementationproperty %0 requires method %1 to be defined - use @dynamic or provide a method implementation in this category-Wobjc-property-implicit-mismatch"primary property declaration is implicitly strong while redeclaration in class extension is weak-Wobjc-property-matches-cocoa-ownership-ruleproperty's synthesized getter follows Cocoa naming convention for returning 'owned' objects-Wobjc-property-no-attributeno 'assign', 'retain', or 'copy' attribute is specified - 'assign' is assumed-Wobjc-property-no-attributedefault property attribute 'assign' not appropriate for non-GC object-Wobjc-property-synthesis"auto property synthesis will not synthesize property '%0' because it cannot share an ivar with another synthesized property-Wobjc-property-synthesisauto property synthesis will not synthesize property '%0' because it is 'readwrite' but it will be synthesized 'readonly' via another property-Wobjc-protocol-method-implementationcategory is implementing a method which will also be implemented by its primary class-Wobjc-protocol-property-synthesisauto property synthesis will not synthesize property declared in a protocol-Wobjc-redundant-literal-useusing %0 with a literal is redundant-Wobjc-root-classclass %0 defined without specifying a base class-Wobjc-string-comparedirect comparison of a string literal has undefined behavior-Wobjc-string-concatenationconcatenated NSString literal for an NSArray expression - possibly missing a comma-Wover-alignedtype %0 requires %1 bytes of alignment and the default allocator only guarantees %2 bytes-Woverloaded-shift-op-parenthesesoverloaded operator %select{|}0 has lower precedence than comparison operator-Woverloaded-virtual%q0 hides overloaded virtual %select{function|functions}1-Woverriding-method-mismatchconflicting distributed object modifiers on parameter type in declaration of %0-Woverriding-method-mismatchconflicting parameter types in declaration of %0: %1 vs %2-Woverriding-method-mismatchconflicting variadic declaration of method and its implementation-Woverriding-method-mismatchconflicting return type in declaration of %0: %1 vs %2-Woverriding-method-mismatchconflicting distributed object modifiers on return type in declaration of %0-Woverriding-method-mismatchconflicting return type in declaration of %0%diff{: $ vs $|}1,2-Woverriding-method-mismatchconflicting parameter types in declaration of %0%diff{: $ vs $|}1,2-Wpackedpacked attribute is unnecessary for %0-Wpaddedpadding size of %0 with %1 %select{byte|bit}2%select{|s}3 to alignment boundary-Wpaddedpadding %select{struct|interface|class}0 %1 with %2 %select{byte|bit}3%select{|s}4 to align %5-Wpaddedpadding %select{struct|interface|class}0 %1 with %2 %select{byte|bit}3%select{|s}4 to align anonymous bit-field-Wparentheses%0 has lower precedence than %1 %1 will be evaluated first-Wparenthesesusing the result of an assignment as a condition without parentheses-Wparenthesesoperator '?:' has lower precedence than '%0' '%0' will be evaluated first-Wparentheses-equalityequality comparison with extraneous parentheses-Wpointer-arithsubtraction of pointers to type %0 of zero size has undefined behavior-Wpredefined-identifier-outside-functionpredefined identifier is only valid inside function-Wprivate-externuse of __private_extern__ on a declaration may not produce external symbol private to the linkage unit and is deprecated-Wprotocolmethod %0 in protocol not implemented-Wprotocol-property-synthesis-ambiguityproperty of type %0 was selected for synthesis-Wreadonly-iboutlet-propertyreadonly IBOutlet property '%0' when auto-synthesized may not work correctly with 'nib' loader-Wreadonly-setter-attrsproperty attributes '%0' and '%1' are mutually exclusive-Wreceiver-exprreceiver type %0 is not 'id' or interface pointer, consider casting it to 'id'-Wreceiver-forward-classreceiver type %0 for instance message is a forward declaration-Wreceiver-is-weak"weak %select{receiver|property|implicit property}0 may be unpredictably set to nil-Wreinterpret-base-class'reinterpret_cast' %select{from|to}3 class %0 %select{to|from}3 its %select{virtual base|base at non-zero offset}2 %1 behaves differently from 'static_cast'-Wreorder%select{field|base class}0 %1 will be initialized after %select{field|base}2 %3-Wrequires-super-attribute%0 attribute cannot be applied to %select{methods in protocols|dealloc}1-Wreturn-stack-addressreturning address of label, which is local-Wreturn-stack-addressreturning reference to local temporary object-Wreturn-stack-addressaddress of stack memory associated with local variable %0 returned-Wreturn-stack-addressreturning address of local temporary object-Wreturn-stack-addressreference to stack memory associated with local variable %0 returned-Wreturn-typenon-void %select{function|method}1 %0 should return a value, DefaultError-Wreturn-typecontrol may reach end of non-void function-Wreturn-typecontrol reaches end of non-void function-Wreturn-type-c-linkage%0 has C-linkage specified, but returns user-defined type %1 which is incompatible with C-Wreturn-type-c-linkage%0 has C-linkage specified, but returns incomplete type %1 which could be incompatible with C-Wsectionsection does not match previous declaration-Wselectorcreating selector for nonexistent method %0-Wselector-type-mismatchmultiple selectors named %0 found-Wself-assignexplicitly assigning a variable of type %0 to itself-Wself-assign-fieldassigning %select{field|instance variable}0 to itself-Wsentinelnot enough variable arguments in %0 declaration to fit a sentinel-Wsentinel"missing sentinel in %select{function call|method dispatch|block call}0-Wshadowdeclaration shadows a %select{" "local variable|" "variable in %2|" "static data member of %2|" "field of %2}1-Wshadow-ivarlocal declaration of %0 hides instance variable-Wshift-count-negativeshift count is negative-Wshift-count-overflowshift count = width of type-Wshift-op-parenthesesoperator '%0' has lower precedence than '%1' '%1' will be evaluated first-Wshift-overflowsigned shift result (%0) requires %1 bits to represent, but %2 only has %3 bits-Wshift-sign-overflowsigned shift result (%0) sets the sign bit of the shift expression's type (%1) and becomes negative-Wshorten-64-to-32implicit conversion loses integer precision: %0 to %1-Wsign-comparecomparison of integers of different signs: %0 and %1-Wsign-conversionimplicit conversion changes signedness: %0 to %1-Wsign-conversionoperand of ? changes signedness: %0 to %1-Wsizeof-array-argumentsizeof on array function parameter will return size of %0 instead of %1-Wsizeof-array-decaysizeof on pointer operation will return size of %0 instead of %1-Wsizeof-pointer-memaccess'%0' call operates on objects of type %1 while the size is based on a " "different type %2-Wsizeof-pointer-memaccessargument to 'sizeof' in %0 call is the same pointer type %1 as the %select{destination|source}2 expected %3 or an explicit length-Wsometimes-uninitializedvariable %0 is %select{used|captured}1 uninitialized whenever %select{'%3' condition is %select{true|false}4|'%3' loop %select{is entered|exits because its condition is false}4|'%3' loop %select{condition is true|exits because its condition is false}4|switch %3 is taken|its declaration is reached|%3 is called}2-Wstatic-local-in-inlinenon-constant static local variable in inline function may be different in different files-Wstatic-self-initstatic variable %0 is suspiciously used within its own initialization-Wstrict-selector-matchmultiple methods named %0 found-Wstring-compareresult of comparison against %select{a string literal|@encode}0 is unspecified (use strncmp instead)-Wstring-conversionimplicit conversion turns string literal into bool: %0 to %1-Wstring-plus-charadding %0 to a string pointer does not append to the string-Wstring-plus-intadding %0 to a string does not append to the string-Wstrlcpy-strlcat-sizesize argument in %0 call appears to be size of the source expected the size of the destination-Wstrncat-sizethe value of the size argument to 'strncat' is wrong-Wstrncat-sizethe value of the size argument in 'strncat' is too large, might lead to a " "buffer overflow-Wstrncat-sizesize argument in 'strncat' call appears " "to be size of the source-Wsuper-class-method-mismatchmethod parameter type %diff{$ does not match super class method parameter type $|does not match super class method parameter type}0,1-Wswitchenumeration value %0 not handled in switch-Wswitchoverflow converting case value to switch condition type (%0 to %1)-Wswitchenumeration values %0 and %1 not handled in switch-Wswitchcase value not in enumerated type %0-Wswitchenumeration values %0, %1, and %2 not handled in switch-Wswitch%0 enumeration values not handled in switch: %1, %2, %3...-Wswitch-enumenumeration value %0 not explicitly handled in switch-Wswitch-enum%0 enumeration values not explicitly handled in switch: %1, %2, %3...-Wswitch-enumenumeration values %0 and %1 not explicitly handled in switch-Wswitch-enumenumeration values %0, %1, and %2 not explicitly handled in switch-Wtautological-compare%select{self-|array }0comparison always evaluates to %select{false|true|a constant}1-Wtautological-comparecomparison of unsigned%select{| enum}2 expression %0 is always %1-Wtautological-comparecomparison of %0 unsigned%select{| enum}2 expression is always %1-Wtautological-constant-out-of-range-comparecomparison of constant %0 with expression of type %1 is always %select{false|true}2-Wthread-safety-analysisexpecting mutex '%0' to be locked at the end of function-Wthread-safety-analysis%select{reading|writing}1 the value pointed to by '%0' requires locking %select{any mutex|any mutex exclusively}1-Wthread-safety-analysisunlocking '%0' that was not locked-Wthread-safety-analysismutex '%0' is locked exclusively and shared in the same scope-Wthread-safety-analysisexpecting mutex '%0' to be locked at start of each loop-Wthread-safety-analysis%select{reading|writing}2 variable '%0' requires locking %select{'%1'|'%1' exclusively}2-Wthread-safety-analysis%select{reading|writing}2 the value pointed to by '%0' requires locking %select{'%1'|'%1' exclusively}2-Wthread-safety-analysiscalling function '%0' requires %select{shared|exclusive}2 lock on '%1'-Wthread-safety-analysislocking '%0' that is already locked-Wthread-safety-analysiscannot resolve lock expression-Wthread-safety-analysiscannot call function '%0' while mutex '%1' is locked-Wthread-safety-analysismutex '%0' is still locked at the end of function-Wthread-safety-analysismutex '%0' is not locked on every path through here-Wthread-safety-analysis%select{reading|writing}1 variable '%0' requires locking %select{any mutex|any mutex exclusively}1-Wthread-safety-attributes%0 attribute only applies to %select{fields and global variables|functions and methods|classes and structs}1-Wthread-safety-attributes'%0' only applies to pointer types type here is %1-Wthread-safety-attributes%0 attribute can only be applied in a context annotated with 'lockable' attribute-Wthread-safety-attributesignoring %0 attribute because its argument is invalid-Wthread-safety-attributes%0 attribute requires arguments whose type is annotated with 'lockable' attribute type here is '%1'-Wthread-safety-attributes%0 attribute requires arguments that are class type or point to class type type here is '%1'-Wthread-safety-betaThread safety beta warning.-Wthread-safety-precisecalling function '%0' requires %select{shared|exclusive}2 lock on '%1'-Wthread-safety-precise%select{reading|writing}2 the value pointed to by '%0' requires locking %select{'%1'|'%1' exclusively}2-Wthread-safety-precise%select{reading|writing}2 variable '%0' requires locking %select{'%1'|'%1' exclusively}2-Wtype-safetyargument type %0 doesn't match specified '%1' type tag %select{that requires %3|}2-Wtype-safetyspecified %0 type tag requires a null pointer-Wtype-safetythis type tag was not designed to be used with this function-Wundeclared-selectorundeclared selector %0 did you mean %1?-Wundeclared-selectorundeclared selector %0-Wundefined-inlineinline function %q0 is not defined-Wundefined-internal%select{function|variable}0 %q1 has internal linkage but is not defined-Wundefined-reinterpret-castreinterpret_cast from %0 to %1 has undefined behavior-Wundefined-reinterpret-castdereference of type %1 that was reinterpret_cast from type %0 has undefined behavior-Wuninitializedreference %0 is not yet bound to a value when used within its own initialization-Wuninitializedblock pointer variable %0 is uninitialized when captured by block-Wuninitializedfield %0 is uninitialized when used here-Wuninitializedreference %0 is not yet bound to a value when used here-Wuninitializedvariable %0 is uninitialized when %select{used here|captured by block}1-Wuninitializedvariable %0 is uninitialized when used within its own initialization-Wunneeded-internal-declaration'static' function %0 declared in header file should be declared 'static inline'-Wunneeded-internal-declaration%select{function|variable}0 %1 is not needed and will not be emitted-Wunneeded-member-functionmember function %0 is not needed and will not be emitted-Wunreachable-codewill never be executed-Wunsequencedmultiple unsequenced modifications to %0-Wunsequencedunsequenced modification and access to %0-Wunsupported-frienddependent nested name specifier '%0' for friend class declaration is not supported turning off access control for %1-Wunsupported-frienddependent nested name specifier '%0' for friend template declaration is not supported ignoring this friend declaration-Wunsupported-visibilitytarget does not support 'protected' visibility using 'default'-Wunused-comparison%select{equality|inequality}0 comparison result unused-Wunused-const-variableunused variable %0-Wunused-exception-parameterunused exception parameter %0-Wunused-functionunused function %0-Wunused-labelunused label %0-Wunused-member-functionunused member function %0-Wunused-parameterunused parameter %0-Wunused-private-fieldprivate field %0 is not used-Wunused-property-ivarivar %0 which backs the property is not referenced in this property's accessor-Wunused-resultignoring return value of function declared with warn_unused_result attribute-Wunused-valueexpression result unused should this cast be to 'void'?-Wunused-valueexpression result unused-Wunused-valueignoring return value of function declared with %0 attribute-Wunused-variableunused variable %0-Wunused-volatile-lvalueexpression result unused assign into a variable to force a volatile load-Wused-but-marked-unused%0 was marked unused but was used-Wuser-defined-literalsuser-defined literal suffixes not starting with '_' are reserved%select{ no literal will invoke this operator|}0-Wvarargssecond argument to 'va_arg' is of promotable type %0 this va_arg has undefined behavior because arguments will be promoted to %1-Wvarargs'va_start' has undefined behavior with reference types-Wvarargssecond parameter of 'va_start' not last named argument-Wvector-conversionincompatible vector types %select{%diff{assigning to $ from $|assigning to different types}0,1|%diff{passing $ to parameter of type $|passing to parameter of different type}0,1|%diff{returning $ from a function with result type $|returning from function with different return type}0,1|%diff{converting $ to type $|converting between types}0,1|%diff{initializing $ with an expression of type $|initializing with expression of different type}0,1|%diff{sending $ to parameter of type $|sending to parameter of different type}0,1|%diff{casting $ to type $|casting between types}0,1}2-Wvexing-parseempty parentheses interpreted as a function declaration-Wvexing-parseparentheses were disambiguated as a function declaration-Wvisibilitydeclaration of %0 will not be visible outside of this function-Wvisibilityredefinition of %0 will not be visible outside of this function-Wvlavariable length array used-Wvla-extensionvariable length arrays are a C99 feature-Wweak-template-vtablesexplicit template instantiation %0 will emit a vtable in every translation unit-Wweak-vtables%0 has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit

Lexer Warnings

WarningMessage-W#pragma-messages%0-W#warnings%0-W#warnings%0-Wambiguous-macroambiguous expansion of macro %0-Wauto-importtreating #%select{include|import|include_next|__include_macros}0 as an import of module '%1'-Wbackslash-newline-escapebackslash and newline separated by space-Wc++11-compatidentifier after literal will be treated as a user-defined literal suffix in C++11-Wc++11-compat'%0' is a keyword in C++11-Wc++98-c++11-compatdigit separators are incompatible with C++ standards before C++1y-Wc++98-c++11-compat-pedanticbinary integer literals are incompatible with C++ standards before C++1y-Wc++98-compatraw string literals are incompatible with C++98-Wc++98-compatunicode literals are incompatible with C++98-Wc++98-compatuniversal character name referring to a control character is incompatible with C++98-Wc++98-compat'::' is treated as digraph ':' (aka '[') followed by ':' in C++98-Wc++98-compatusing this character in an identifier is incompatible with C++98-Wc++98-compatspecifying character '%0' with a universal character name is incompatible with C++98-Wc++98-compat-pedanticvariadic macros are incompatible with C++98-Wc++98-compat-pedantic#line number greater than 32767 is incompatible with C++98-Wc++98-compat-pedanticC++98 requires newline at end of file-Wc++98-compat-pedanticempty macro arguments are incompatible with C++98-Wc99-compatunicode literals are incompatible with C99-Wc99-compat%select{using this character in an identifier|starting an identifier with this character}0 is incompatible with C99-Wcomment'/*' within block comment-Wcommentescaped newline between */ characters at block comment end-Wdisabled-macro-expansiondisabled expansion of recursive macro-Wheader-guard%0 is used as a header guard here, followed by #define of a different macro-Wignored-attributesunknown attribute '%0'-Wincomplete-moduleheader '%0' is included in module '%1' but not listed in module map-Wincomplete-umbrellaumbrella header for module '%0' does not include header '%1'-Winvalid-token-pastepasting formed '%0', an invalid preprocessing token, DefaultError-Wmalformed-warning-check__has_warning expected option name (e.g. \"-Wundef\")-Wnewline-eofno newline at end of file-Wnull-characternull character ignored-Wnull-characternull character(s) preserved in string literal-Wnull-characternull character(s) preserved in character literal-Wtrigraphsignored trigraph would end block comment-Wtrigraphstrigraph ignored-Wundef%0 is not defined, evaluates to 0-Wunicodeuniversal character names are only valid in C99 or C++ treating as '\\' followed by identifier-Wunicode\\%0 used with no following hex digits treating as '\\' followed by identifier-Wunicodeincomplete universal character name treating as '\\' followed by identifier-Wunicodeuniversal character name refers to a surrogate character-Wunknown-pragmasunknown pragma ignored-Wunknown-pragmaspragma STDC FENV_ACCESS ON is not supported, ignoring pragma-Wunused-macrosmacro is not used

Parser Warnings

WarningMessage-Warc-bridge-casts-disallowed-in-nonarc'%0' casts have no effect when not using ARC-Wattributesunknown __declspec attribute %0 ignored-Wavailability'unavailable' availability overrides all other availability information-Wc++11-compatuse of right-shift operator ('') in template argument will require parentheses in C++11-Wc++11-compat'auto' storage class specifier is redundant and incompatible with C++11-Wc++98-c++11-compat'decltype(auto)' type specifier is incompatible with C++ standards before C++1y-Wc++98-compatrange-based for loop is incompatible with C++98-Wc++98-compatalias declarations are incompatible with C++98-Wc++98-compatin-class initialization of non-static data members is incompatible with C++98-Wc++98-compatdefaulted function definitions are incompatible with C++98-Wc++98-compatrvalue references are incompatible with C++98-Wc++98-compatreference qualifiers on functions are incompatible with C++98-Wc++98-compatinline namespaces are incompatible with C++98-Wc++98-compatgeneralized initializer lists are incompatible with C++98-Wc++98-compattrailing return types are incompatible with C++98-Wc++98-compatenumeration types with a fixed underlying type are incompatible with C++98-Wc++98-compatalignof expressions are incompatible with C++98-Wc++98-compat'%0' keyword is incompatible with C++98-Wc++98-compat'decltype' type specifier is incompatible with C++98-Wc++98-compatdeleted function definitions are incompatible with C++98-Wc++98-compatconsecutive right angle brackets are incompatible with C++98 (use '> >')-Wc++98-compatstatic_assert declarations are incompatible with C++98-Wc++98-compatscoped enumerations are incompatible with C++98-Wc++98-compatlambda expressions are incompatible with C++98-Wc++98-compatattributes are incompatible with C++98-Wc++98-compat'alignas' is incompatible with C++98-Wc++98-compatnoexcept specifications are incompatible with C++98-Wc++98-compatliteral operators are incompatible with C++98-Wc++98-compatnoexcept expressions are incompatible with C++98-Wc++98-compat'nullptr' is incompatible with C++98-Wc++98-compat-pedanticextra '' outside of a function is incompatible with C++98-Wc++98-compat-pedanticextern templates are incompatible with C++98-Wc++98-compat-pedanticcommas at the end of enumerator lists are incompatible with C++98-Wdangling-elseadd explicit braces to avoid dangling else-WdeprecatedUse of 'long' with '__vector' is deprecated-Wdeprecated-declarationsuse of C-style parameters in Objective-C method declarations is deprecated-Wdeprecated-register'register' storage class specifier is deprecated-Wduplicate-decl-specifierduplicate '%0' declaration specifier-Wextra-semiextra ';' after member function definition-Wextra-tokens"extra tokens at the end of '#pragma omp %0' are ignored-Wgcc-compatGCC does not allow %0 attribute in this position on a function definition-Wignored-attributesattribute %0 ignored, because it is not attached to a declaration-Wmicrosoft-existsdependent %select{__if_not_exists|__if_exists}0 declarations are ignored-Wmissing-selector-name%0 used as the name of the previous parameter rather than as part of the selector-Wsemicolon-before-method-bodysemicolon before method body is ignored-Wsource-uses-openmp"unexpected '#pragma omp ...' in program-Wstatic-inline-explicit-instantiationignoring '%select{static|inline}0' keyword on explicit template instantiation