warning non void function does not return a value

MISRA. Empty exception handler. Consider inspecting the 'for' operator. This means that the second 'if' statement is senseless. V6040. no return statement in function returning non-void while using C++, How a top-ranked engineering school reimagined CS curriculum (Ep. V532. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Expressions with enum underlying type should have values corresponding to the enumerators of the enumeration. Suspicious return of an always empty collection. V3141. V2550. V3078. Buffer size is not a multiple of element size. N argument has memsize type. Check if program logic handles it correctly. The second condition is always false. Two similar code fragments were found. Consider allocating it on the stack instead. Several shared_ptr objects are initialized by the same pointer. This way, you won't miss messages from our team in the future. Lifetime of the heap-allocated variable is limited to the current function's scope. Use memsize-type here. This may break the program's logic. Macro expression is dangerous or suspicious. V617. V3509. MISRA. Operation is executed 3 or more times in a row. For example, running this piece of code is working fine: While, on the other hand, if we try to use/call some function to complete the throw, it is facing the well known error/warning of: I am pretty curious about this as this is directly related to one of my other issue, where just like here, throw is working fine but using macro for throw is facing the same error. The body of a loop\conditional statement should be enclosed in braces. V5603. MISRA. The double result is stored in fraction, then printed. The variable in the loop exit condition does not change its value between iterations. Consider using 'i + 1' instead. V2613. V775. V3541. Suspicious expression 'A[B < C]'. AUTOSAR. I forgot it would still issue if all paths don't have a return. Consider refactoring the 'Foo' function. V3116. The closing tag was encountered, while the tag was expected. Explicit conversion of pointer type to 32-bit integer type. V3552. More than one sizeof() operator is used in one expression. Object should not be assigned or copied to an overlapping object. A function should not call itself either directly or indirectly. V2594. The 'if' 'else if' construct should be terminated with an 'else' statement. "non-void function does not return a value in all control paths". Strings were concatenated but not used. Already on GitHub? Variable was compared to zero before it was used as a divisor. A function should not call itself either directly or indirectly. V6011. V3054. warning: 'return' with a value, in function returning void 2. Your function should return a vector in every possible condition. V3091. V759. Member 'x' should point to string terminated by two 0 characters. Memory allocation and deallocation methods are incompatible. V3043. Floating-point values should not be tested for equality or inequality. Constant expression in switch statement. Unary minus operator does not modify a bool type value. The expression is excessive or contains a logical error. It is possible that creating a new variable is unnecessary. V2541. An object is used as an argument to its own method. It is suspicious that the result of the statement is a part of the condition. Save the file, and compile it in a Developer command prompt window by using the command: Then, to run the example code, enter C_return_statement.exe at the command prompt. V765. Unions should not be used. V629. As we know pipelined function doesn't require Return, because of its working and for best programming practice we write it. Consider using parentheses in the expression. V3023. Probably meant: *ptr != zero. Consider inspecting the expression. V6078. Looking at the assembly GCC 11.2 generates for this with -O3, we see it has in fact recognized that the union of all cases in the if and else if covers all possibilities: It has generated only two code paths, not three. WPF: writing and reading are performed on a different Dependency Properties. Suspicious assignment inside the conditional expression of 'if/while/dowhile' statement. Asking for help, clarification, or responding to other answers. V2586. V605. An early return is a return statement that occurs before the last line of a function. V6067. Incorrect format. Comparing objects of incompatible types. A pointer/reference parameter in a function should be declared as pointer/reference to const if the corresponding object was not modified. V564. V6038. Negative value is implicitly converted to unsigned integer type in arithmetic expression. V2507. V3015. V1018. The '? Size of an array is not specified. V2517. Calling the 'delete' operator for a void pointer will cause undefined behavior. V2003. V109. As a good engineering practice, always specify a return type for your functions. So, the solution is to apply the warn_unused_result attribute on the function. V712. V1036. V3125. It is suspicious that it is used as a variable of a Boolean-type. Variables are initialized through the call to the same function. Check lines: N1, N2. This may lead to undefined behavior. Generating points along line with specifying the origin of point generation in QGIS. V5004. V2516. P.S. How do I stop the Flickering on Mode 13h? A memory/resource leak is possible. V3011. V3181. Consider inspecting the expression. The 'operator &&', 'operator ||', 'operator ,' and the unary 'operator &' should not be overloaded. Please check projects and solution configurations. V6030. This may lead to undefined behavior. A function should have a single point of exit at the end. AUTOSAR. V1038. V3046. V797. If you cant find an answer to your question, fill in the form below and our developers will contact you. AUTOSAR. V3041. V2560. V3131. Sign in to comment V6053. Possible LDAP injection. V205. MISRA. V2611. V639. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. . : .' should be used here instead of 'foo = bar = baz ? Trying to return a value from a non-value returning function will result in a compilation error: A return statement that is not the last statement in a function is called an early return. V3066. V1084. It is inefficient to identify an empty string by using 'strlen(str) > 0' construct. MISRA. Make this option control the pedwarns that don't have any option. V2559. Decreased performance. V110. V698. It calls strlen once and either jumps to .L1 or falls through to the then code, which rejoins at .L1. Potentially tainted data might be used to execute a malicious script. V1091. MISRA. MISRA. Consider using a comparison with defined precision: Math.Abs(A - B) < Epsilon or Math.Abs(A - B) > Epsilon. Functions' declarations with 'Foo' name differ in 'const' keyword only, while these functions' bodies have different composition. OWASP. Functions should not have unused parameters. V3503. V6101. The line contains control character 0x0B (vertical tabulation). rev2023.4.21.43403. If total energies differ across different software, how do I decide which software to use? MISRA. MISRA. If the 'GetSign' function receives 0, undefined behavior will occur. Cast should not remove 'const' / 'volatile' qualification from the type that is pointed to by a pointer or a reference. Do not use real-type variables as loop counters. V2505. Parameter 'A' is always rewritten in method body before being used. V767. V2618. Consider inspecting the expression. Decreased performance. Pointer is compared with 'zero' value. Consider inspecting the expression. The 'goto' statement shouldn't jump to a label declared earlier. What should I follow, if two altimeters show different altitudes? Consider adding '[Flags]' attribute to the enum. MISRA. If control passes to Exit Function or End Function and you have not assigned any value to the procedure name, the procedure returns the default value of the return data type. Consider inspecting the expression. MISRA. V3095. Undefined behavior will occur in case of signed integer overflow. Undefined behavior. Consider inspecting the expression. It is possible that an incorrect variable is compared with null after type conversion using 'as' keyword. Expression 'A = B == C' is calculated as 'A = (B == C)'. MISRA. V3006. To compile the example, create a source code file named C_return_statement.c. V713. Function returns pointer/reference to temporary local object. V791. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? V6066. V1053. The left operand of integer division is less than the right one. Parameter is not used inside method's body. It is possible that another argument should be passed instead. V2018. Void functions don't need a return statement A void function will automatically return to the caller at the end of the function. You may or may not use the return . The 'Foo' function is called twice in the specified expression to calculate length of the same string. V3094. Consider inspecting the application's logic. All memory or resources allocated dynamically should be explicitly released. Possible incorrect order of arguments passed to function. The 'A' class contains 'Dispose' method. OWASP. Usage of a suspicious mutex wrapper. AUTOSAR. V760. One of the operands in the operation equals NN. V1083. Operand of sizeof() operator should not have other side effects. V2569. Possible server-side request forgery. V3545. Potential incorrect use of item 'X'. V778. The name of 'X' field/property in a nested type is ambiguous. Member operator[] of 'foo' class has a 32-bit type argument. Buffer overflow is possible. One is enough. In this lesson, well explore functions with a return type of void. The 'SysFreeString' function should be called only for objects of the 'BSTR' type. The 'foo' word is suspicious. Constant value is represented by an octal form. Calling the 'foo' virtual function in the constructor/destructor may lead to unexpected result at runtime. V562. rev2023.4.21.43403. It is more efficient to use an initialization list rather than an assignment operator. Controlling expressions should not be invariant. An array/object was declared but was not utilized. V2587. Consider using: static_cast/const_cast/reinterpret_cast. OWASP. V6100. Expressions that use comma operator ',' are dangerous. V511. V303. V509. 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. At the end of printHi, control returns to main and the program proceeds. V578. One of the function's arguments has the same name and this argument is a reference. V579. V3115. Use volatile variable(s) or synchronization primitives to avoid this. What if I write return statement in constructor? Compound assignment expression is used inside condition. This will result in undefined behavior. V576. A return statement (with no return value) can be used in a void function -- such a statement will cause the function to return to the caller at the point where the return statement is executed. Possibly, it was intended to be escaped. This will cause the loss of the higher bits. V1022. V821. Identical expression to the left and to the right of compound assignment. More info about Internet Explorer and Microsoft Edge, Compile Page, Project Designer (Visual Basic). Calling an overridden method in parent-class constructor may lead to use of uninitialized data. Temporary anonymous object is used. V2554. Unable to start the analysis on this file. Parameter of 'std::stop_token' type is not used inside function's body. V573. Identifiers that start with '__' or '_[A-Z]' are reserved. Signed integer overflow in arithmetic expression. Consider pre-allocating it by calling reserve(N). V5625. Perhaps, this statement should have been compared with something else. V746. The function argument corresponding to a parameter declared to have an array type should have an appropriate number of elements. V1095. By clicking Sign up for GitHub, you agree to our terms of service and V3053. Variable was used as a divisor before it was compared to zero. Suspicious type cast: 'Type1' to ' Type2'. V3077. Suspicious return of a local reference variable which always equals null. V780. AUTOSAR. The '#pragma warning(push/pop)' should be used instead. All conditional inclusion preprocessor directives should reside in the same file as the conditional inclusion directive to which they are related. Waiting on this expression is unreliable, as compiler may optimize some of the variables. :' operator, regardless of its conditional expression, always returns the same value. A boy can regenerate, so demons eat him for years. Executing this query may lead to an error. Without re-registering for finalization, destructor will not be called a second time on resurrected object. AUTOSAR. V2619. V002. Casts between a pointer and a non-integer arithmetic type should not be performed. Check your control flow logic and make sure you assign a value before every statement that causes a return. Consider inspecting the loop expression. It achieves the same as what you have but it only will add a line instead of modifying the whole function body, and it will be one allocation less ( int val = 0; ). V1040. Use of outdated cryptographic algorithm is not recommended. V1009. V3112. The expression, if present, is evaluated and then converted to the type returned by the function. V1045. V716. The body of a loop\conditional statement should be enclosed in braces. Possible typo in the spelling of a pre-defined macro name. Asking for help, clarification, or responding to other answers. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. V795. Size of a pointer is divided by another value. V3121. V1017. Object slicing. V2608. V1062. Use of 'Foo' uninitialized variable. V5620. Possible exception when deserializing type. Usage of non memsize type for pointer arithmetic. MISRA. Consider reviewing 'X'. There are identical sub-expressions to the left and to the right of the 'foo' operator. Can you still use Commanders Strike if the only attack available to forego is an attack against an ally? V568. V565. MISRA. The other function parameter expects a file path instead. The 'Foo' pointer is always not equal to NULL. V3170. Potentially unsafe double-checked locking. Just make it return, @NathanOliver One could imagine a slightly more complex example which was fully reasonable, like. V754. V722. Conversions between pointers to objects and integer types should not be performed. Flowing off the end of thesefunctions is equivalent to a'return 0;'. It is suspicious that a char or string literal is added to a pointer. AUTOSAR. Not the answer you're looking for? V5301. V693. There should be no implicit integral-floating conversion. Label is present inside switch(). V3104. Possible missing parentheses. What is the Russian word for the color "teal"? MISRA. Upper bound of case range is less than its lower bound. To learn more, see our tips on writing great answers. V2520. V542. Modified value of the operand is not used after the increment/decrement operation. Value of a composite expression should not be cast to a different essential type category or a wider essential type. Potentially unsafe double-checked locking. Consider using the KK constant. A return statement ends the execution of a function, and returns control to the calling function. Possible incorrect order of arguments passed to method. V541. V3535. 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? Property accessors use different backing fields. In lieu of a data type, void functions use the keyword "void." A void function performs a task, and then control returns back to the caller--but, it does not return a value. Pointer is used both as an array and as a pointer to single object. Possible path traversal vulnerability. V3002. Decreased performance. V632. V777. V1059. Further, testing by changing the function return type to int and changing the returns to 0 in the then code, 1 in the else if code, and 2 outside that shows assembly code that only returns 0 or 1, proving GCC was not just collapsing the third path into undefined behavior; it outright eliminates it because it is not possible. OWASP. The '||' operator is surrounded by opposite expressions 'x' and '!x'. It is possible that an error is present. V577. Incorrect shifting expression. Conversion between pointers of different object types should not be performed. V566.

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