V3539. MISRA. V3188. V521. The first statement in print() prints A. (Experienced programmers will generally use a solitary. If you are treating warnings as errors, you may need to temporary disable that setting in order to compile the example. The analysis results could be incomplete. V6056. MISRA. V2602. It is inefficient to identify an empty string by using 'strlen(str) > 0' construct. The same sub-expression is present on both sides of the operator. Consider inspecting it for a possible error. V524. rev2023.4.21.43403. V6088. Consider wrapping the throw operator in a try..catch block. This return value is also printed. V3155. V2621. OWASP. Unreachable code should not be present in the project. Every switch-clause should be terminated by an unconditional 'break' or 'throw' statement. V3116. Empty exception handler. Constant value is represented by an octal form. You are assuming that loop will always run, but, what if an empty string ends up getting submitted? Correction-related comments will be deleted after processing to help reduce clutter. Expression of the 'A =- B' kind is used. Void functions are created and used just like value-returning functions except they do not return a value after the function executes. V2556. V672. V3172. V6004. Attempt to release memory that stores the 'Foo' local variable. V641. V302. V3523. V3182. V2622. V3525. V585. V2574. It's odd that this method always returns one and the same value of NN. Initializer of a field marked by [ThreadStatic] attribute will be called once on the first accessing thread. privacy statement. Sign in to comment If a function sometimes forgets to return a result, you will get a warning (if you have requested warnings). Functions should not have unused parameters. V6090. Such a statement will cause the function to return to the caller when the return statement is executed (before the function would otherwise return to the caller, hence, early). OWASP. There is nothing we can do in this situation - there are no default values to return in case of exceptions. MISRA. Field 'A' is being used before it was initialized. Consider inspecting the 'T foo = foo = x;' expression. V744. MISRA. V1035. The name of 'X' field/property in a nested type is ambiguous. Modification of variable is unsequenced relative to another operation on the same variable. V592. V3047. Making statements based on opinion; back them up with references or personal experience. When a return statement contains an expression in functions that have a void return type, the compiler generates a warning, and the expression isn't evaluated. V658. V682. V726. V2564. V2584. V5615. I compiled a small program containing the following function definition. Casting pointer to a type of a larger size is an implementation-defined behavior. A function should not call itself either directly or indirectly. Use the RtlSecureZeroMemory() function to erase private data. V5626. Keyword 'nullptr' can be used for 'pointer' type exception. Suspicious explicit conversion from 'float *' type to 'double *' type. Unsafe invocation of event, NullReferenceException is possible. Expression of the 'A - B > 0' kind will work as 'A != B'. Decreased performance. V6099. Checking value for null will always return false when generic type is instantiated with a value type. We discuss the debate over early returns in lesson 7.10 -- Break and continue. AUTOSAR. MISRA. V1075. V584. V3121. Consider inspecting the condition. V206. AUTOSAR. The '? MISRA. @Sneftel Good point. MISRA. The standard input/output functions should not be used. V6069. Implicit type conversion of return value from memsize type to 32-bit type. The value range of the variable: [A, B]. Value of the essential character type should be used appropriately in the addition/subtraction operations. V651. V797. V3143. This way, you won't miss messages from our team in the future. V3175. There are two 'if' statements with identical conditional expressions. V766. Already have an account? Implicit assignment type conversion to memsize type. The function with the 'atof/atoi/atol/atoll' name should not be used. WPF: the names of the property registered for DependencyProperty, and of the property used to access it, do not correspond with each other. Flowing off the end of a non-void function with no 'return' results in undefined behavior. V5611. Consider using a comparison with defined precision: Math.Abs(A - B) < Epsilon or Math.Abs(A - B) > Epsilon. Halt! In the name of C++; or why C++ functions don't need a return Only the first element is initialized explicitly. Potential XEE vulnerability. The compiler isn't going to go to very much trouble to detect this situation, because functions like throw_blah which are guaranteed to never return are rare, and because except in the simplest of situations, there's no way for it to reliably do so. Uninitialized class member is used to initialize another member. V528. V3551. MISRA. Check the following code block after the 'if' statement. Flexible array members should not be declared. An odd precise comparison. Array indexing should be the only form of pointer arithmetic and it should be applied only to objects defined as an array type. V745. Multiple copies of it will be created in all translation units that include this header file. Effect of a "bad grade" in grad school applications, Using an Ohm Meter to test for bonding of a subpanel. Consider using the M_NN constant from . V110. This leads to undefined behavior. V659. Incorrect type of a loop variable. V1085. V771. V6027. Consider inspecting the expression. OWASP. Constructor contains potentially uninitialized members. V639. V530. rev2023.4.21.43403. The '!=' operator should probably be used here. Trying to use the return value from the function will most likely cause a segmentation fault. Ineffective use of the 'count' function. Possible path traversal vulnerability. Consider inspecting 'X'. An exception handling block does not contain any code. How do I count the number of sentences in C using ". The 'memset/memcpy' function is used to nullify/copy fields of 'Foo' class. The size of the dynamic array can be less than the number of elements in the initializer. Function exited without releasing the pointer/handle. Thread.sleep() inside synchronized block/method may cause decreased performance. Wrong variable is probably used in the for operator as an index. V2577. Generating points along line with specifying the origin of point generation in QGIS. V2617. V3014. V3043. Possible null dereference. So GCC knows there is no possible control path that does not return a value, but it reported the warning (elevated to an error) anyway. If you cant find an answer to your question, fill in the form below and our developers will contact you. V3535. The signature of method 'X' does not conform to serialization requirements. C++ code showing Line 25: Char 5: error: non-void function does not Decreased performance. It's possible that an assigned variable should be checked in the next condition. V3128. V756. The value of uninitialized variable should not be used. V2610. V695. Possibly meant: 'A += B'. V617. V809. V002. Perhaps a short-circuit operator should be used instead. V2600. Function returns a pointer to the internal string buffer of a local object, which will be destroyed. Macro should not be defined with the same name as a keyword. The object was created but it is not being used. Buffer overflow is possible. Use of jump statements in 'finally' block can lead to the loss of unhandled exceptions. This example is one program in several parts. Compound assignment expression is used inside condition. A value is being subtracted from the unsigned variable. V560. Literal suffixes should not contain lowercase characters. V122. V3547. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Argument of abs() function is minimal negative value. V728. It is possible that different variables are used inside initializer and iterator. V6039. The method does not override another method from the base class. As we know pipelined function doesn't require Return, because of its working and for best programming practice we write it. Assign the value to the Function procedure name and then perform an Exit Function statement. The expression is incorrect or it can be simplified. V804. Expression is equivalent to moving one unique pointer to another. NullReferenceException is possible. It is possible that different variables are used inside initializer and iterator. If you have a C++ program missing a return statement from a function that is supposed to return a value, g++ will compile it happily with no errors (or even a warning, unless -Wreturn-type or -Wall is used). MISRA. V2570. Some diagnostic messages may contain incorrect line number. A few are mentioned below: . Consider synchronizing the field on all usages. WPF: A class containing registered property does not correspond with a type that is passed as the ownerType.type. Decreased performance. Passing objects of incompatible types to the method of collection. Presence of #line directives may cause some diagnostic messages to have incorrect file name and line number. V3166. V6070. It makes code less human error prone. V754. Potentially infinite loop. V6015. The size of the bit mask is less than the size of the first operand. V3532. Allocation of memory by the pattern "(X*)malloc(sizeof(Y))" where the sizes of X and Y types are not equal. What if I write return statement in constructor? V1082. V2528. V3531. The function located to the right of the '|' and '&' operators will be called regardless of the value of the left operand. The expression is excessive or contains a logical error. V697. We and our partners use cookies to Store and/or access information on a device. This presents the compiler with a contradicting declaration and return. "Not Spam" button for our message. It is possible that an assigned variable should be checked in the next condition. Non-void functions always have to have a return statement. Why do we ask to use Business You can return a value from a Function procedure in any of the following ways: Assign the value to the Function procedure name and then perform an Exit Function statement. The address of an object with local scope should not be passed out of its scope. To tell the compiler that a function does not return a value, a return type of void is used. Suspicious type cast: 'Type1' to ' Type2'. The 'else' keyword may be missing. V3517. Size of a pointer is divided by another value. Consequently, the compiler will flag this as an error. V6002. V2597. Is that what you want? Perhaps another variable should be incremented instead. The switch statement does not cover all values of the enum. V759. error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]} bool is_full() { if() { return 1; } else if() { return 0; } else if() { return 1; } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 : V6009. V603. V3180. V1084. Size of every element in X array is not equal to divisor. i'm not sure if this is intentional behavior. Possibly an equality comparison was intended. V679. It was deemed useful to report this warning as it typically results from inadvertent program design rather than intentional coverage of all cases with a redundant test. std::cout), a value must be provided. The 'goto' statement shouldn't jump to a label declared earlier. The operator evaluates both operands. It is complaining because within the first for loop, if block returns v but else if block does not return anything. No return statement is required. No handlers will be unsubscribed, as a separate delegate instance is created for each anonymous function declaration. Manage Settings MISRA. Every 'switch' statement should contain non-empty switch-clauses. Array indexing should be the only form of pointer arithmetic and it should be applied only to objects defined as an array type. An identifier declared in an inner scope should not hide an identifier in an outer scope. Use volatile variable(s) or synchronization primitives to avoid this. Number of elements in the allocated array equals the size of a pointer in bytes. What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value? V2572. V798. V3528. Value of 'A' type is assigned to a pointer of 'B' type. Pointer is compared with 'zero' value. V691. There is a probability of logical error presence. Operands of the logical '&&' or the '||' operators, the '!' Class destructor should not exit with an exception. V640. Consider checking the Nth actual argument of the 'Foo' function. The address of an object with local scope should not be passed out of its scope. V1020. V2566. V3169. The code's operational logic does not correspond with its formatting. OWASP. V1040. Operand that is a composite expression has more narrow essential type than the other operand. My statement was question specific. AUTOSAR. V723. String literal contains potential interpolated expression. V506. Compiler may optimize out this loop or make it infinite. V814. Implicit conversion of the type of 'new' operator's argument to size_t type. nlohmann/json.hpp:20877:5: warning: non-void function does not return a value in all control paths [-Wreturn-type]. Consider casting operands, not the result. Functions should not have unused parameters. The expression contains a suspicious mix of integer and real types. V3061. Object is used as an argument to its own method. for example: void throw_blah () { throw "blah"; } int foo () { throw_blah (); } I am pretty curious about this as this is directly related to one of my other issue . Not all the members of type are serialized inside 'GetObjectData' method. Consider using a comparison with defined precision: fabs(A - B) < Epsilon or fabs(A - B) > Epsilon. AUTOSAR. Please check projects and solution configurations. Block of memory should only be freed if it was allocated by a Standard Library function. Suspicious division. Consequently, putting an empty return statement at the end of a void function is redundant: Do not put a return statement at the end of a non-value returning function. OWASP. Silent suppression of exceptions can hide errors in source code during testing. MISRA. Possible incorrect order of arguments passed to method. Consider inspecting the '? AUTOSAR. Such functions are usually marked '[[noreturn]]'. It means that there is no default return value for your function outside of the for loop. All I want the function to do is add one to the value of the each character inputted into the string array and shift it on the ASCII table and then return the coded message. Semicolon ';' is probably missing after the 'return' keyword. Implicit type conversion N argument of function 'foo' to 32-bit type. The expression is incorrect or can be simplified. V796. Using 'std::move' function's with const object disables move semantics. If you wish to call constructor, use 'this->Foo::Foo(.)'. I am writing a function to validate if the strlen of a string = 26 or not and returning a boolean value however I get an error message stating "error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type]" despite there being no way for a value not to be returned. V1044. Array is used as pointer to single object. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. V2011. V795. If you do this, the last statement before End Function should be a Return statement. This file is marked with copyleft license, which requires you to open the derived source code. V3036. The "" closing tag was encountered, while the "" tag was expected. V826. The 'default' label should be either the first or the last label of a 'switch' statement. V536. The 'swap' function may interchange a variable with itself. Empirical analysis. Expression used in condition should have essential Boolean type. V517. V6089. Consider inspecting virtual function arguments. Variable was compared to zero before it was used as a divisor. Suspicious expression inside parentheses. ", "? In a main function, the return statement and expression are optional. The '&=' operation always sets a value of 'Foo' variable to zero. warning: 'return' with a value, in function returning void 2. V6005. Giving short names to global variables is considered to be bad practice. Casting expression to 'X' type before implicitly casting it to other type may be excessive or incorrect. Non-atomic modification of volatile variable. Conditional escape sequence in literal. MISRA. All conditional inclusion preprocessor directives should reside in the same file as the conditional inclusion directive to which they are related. V1081. V1086. He also rips off an arm to use as a sword. MISRA. Casts between a pointer to an incomplete type and any other type shouldn't be performed. MISRA. Then the return statement executes, and control returns back to the caller (main). Consider making it implement 'IDisposable' interface. Generating points along line with specifying the origin of point generation in QGIS. The 'then' statement is equivalent to the 'else' statement. Initial and final values of the iterator are the same. Consider declaring it as a reference. V2616. V1057. Function receives an odd argument. The expression, if present, is evaluated and then converted to the type returned by the function. V5607. V683. Consider inspecting the 'Foo' function call. The 'a % b' expression always evaluates to 0. V736. C++ | Delft V2539. V051. Consider adding '[Flags]' attribute to the enum. V6074. Why typically people don't use biases in attention mechanism? V2568. V2588. V2579. Conversion between pointers of different object types should not be performed. The DllMain function throws an exception. MISRA. V3109. Storing credentials inside source code can lead to security issues. The alignment rules and type sizes have been changed. MISRA. Don't use terminating functions in library code. V3186. Not the answer you're looking for? Constructor parameter is not used. Expression's value is copied at the variable declaration. Suspicious subexpression in a sequence of similar comparisons. All integer constants of unsigned type should have 'U' suffix. C++ code showing Line 25: Char 5: error: non-void function does not return a value in all control paths [-Werror,-Wreturn-type], How a top-ranked engineering school reimagined CS curriculum (Ep. V821. V111. It will be closed before the method exits. Suspicious access to element by a constant index inside a loop. V2603. V1059. One of the function's arguments has the same name and this argument is a reference. This may be a potential error. V6094. Is it safe to publish research papers in cooperation with Russian academics? Probably the '+=' should be used here. V833. Possible open redirect vulnerability. The 'i' variable should probably be incremented instead of the 'n' variable. V1030. The '?.' V722. V1060. V3067. In case of false, your function will not return anything and result in compilation error. Dangerous widening type conversion from an array of derived-class objects to a base-class pointer. This is unexpected behavior. Its priority is lower than priority of other operators in its left part. Then, enable it by default, but also make it be enabled by Wpedantic and Wreturn-type. V742. Integer constant is converted to pointer. How do I stop the Flickering on Mode 13h? Expression containing increment (++) or decrement (--) should not have other side effects. It is more effective to use the prefix form of ++it. V3507. The 'malloc' function is used to allocate memory for an array of objects that are classes containing constructors/destructors. V1058. Parameter 'A' is always rewritten in method body before being used. V790. The function argument corresponding to a parameter declared to have an array type should have an appropriate number of elements. ", "!"? MISRA. V3149. The line contains control character 0x0B (vertical tabulation). In this case, the return value of the called function is undefined. V705. Then main returns a value of 0 (typically used to report success) to end the program. V725. Potentially unsafe double-checked locking. V538. The 'first' argument of 'Foo' function is equal to the 'second' argument. V1001. operator instead. V6041. Since the function doesnt return a value, this is fine. V3177. V2503. The global namespace should only contain 'main', namespace declarations and 'extern "C"' declarations. V3041. To learn more, see our tips on writing great answers. See documentation for details. V677. If you have a function like throw_blah which is defined to never return, you can use the [[noreturn]] attribute to tell the compiler about it, and it will suppress the warning. Operand of sizeof() operator should not have other side effects. Converting integers or pointers to BOOL can lead to a loss of high-order bits. The return value of non-void function should be used. An overflow of the 32-bit variable is possible inside a long cycle which utilizes a memsize-type loop counter. V615. V2585. OWASP. Exception caught by handler for base class. Two opposite conditions were encountered. V3138. V546. The 'if (A) {} else if (A) {}' pattern was detected. New variable with default value is created instead of 'std::unique_lock' that locks on the mutex. V3084. V6103. MISRA. When main calls printHi, the code in printHi executes, and Hi is printed. AUTOSAR. Cast should not remove 'const' qualifier from the type that is pointed to by a pointer or a reference. The value is out of range of enum values. Two or more case-branches perform the same actions. V829. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. The 'throw' keyword could be missing. The identifier 'main' should not be used for a function other than the global function 'main'. V6037. Possible NoSQL injection. V623. The expression contains a comma. V753. Initial and final values of the iterator are the same. Use of 'Foo' named constant with 0 value in bitwise operation.
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