Inconsistent synchronization of a field. Expression 'A = B == C' is calculated as 'A = (B == C)'. V528. The text was updated successfully, but these errors were encountered: Also, can you provide a minimal code sample that reproduces this issue? Consider assigning event to a local variable before invoking it. V6057. Potentially tainted data is used in the path toextractthe file. The 'switch' statement should have 'default' as the last label. Parameter 'A' is always rewritten in method body before being used. V3036. Expressions with enum underlying type should have values corresponding to the enumerators of the enumeration. Consider inspecting the condition for mistakes. The 'zero' value is assigned to pointer. V2574. Decreased performance. The 'if' 'else if' construct should be terminated with an 'else' statement. The second function call to function printHi() wont even compile. These conditions may be true or false. It is possible that these are misprints and 'default:' label should be used instead. V2603. V5605. V622. It makes code less human error prone. Passing objects of incompatible types to the method of collection. V3149. V127. V125. Adding EV Charger (100A) in secondary panel (100A) fed off main (200A). V2590. A pointer/reference parameter in a function should be declared as pointer/reference to const if the corresponding object was not modified. Significant bits may be lost. Consider utilizing an explicit type cast to avoid the loss of a fractional part. The resulting value could be inaccurate. OWASP. The closing tag was encountered, while the tag was expected. V828. V1034. V2601. Email? Two or more case-branches perform the same actions. V008. The size of the bit mask is less than the size of the first operand. It is odd that the body of 'Foo_1' function is fully equivalent to the body of 'Foo_2' function. V567. V725. The 'switch' statement should have 'default' as the last label. Argument of abs() function is minimal negative value. The code's operational logic does not correspond with its formatting. Possible meaningless check for null, as memory was allocated using 'new' operator. Unconditional 'break/continue/return/goto' within a loop. The modulo by 1 operation is meaningless. V688. V589. V1024. Abnormality within similar comparisons. Suspicious expression 'A[B < C]'. Casting expression to 'X' type before implicitly casting it to other type may be excessive or incorrect. The 'x' variable is assigned to itself. Appending an element and checking for key uniqueness is performed on two different variables. The variable is incremented in the loop. Defining an absolute path to the file or directory is considered a poor style. V661. Consider inspecting it. It is possible that '1' should be present instead of '0'. V2621. It is suspicious and can possibly be an error. This may lead to ODR violation. The ratio function returns the ratio of its two int arguments as a floating-point double value. Possibly meant: 'A += B'. Consider inspecting the statement of '*pointer++' pattern. Function should not be declared implicitly. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? V5010. V3112. V3125. V2539. V2545. V6002. V529. BSTR string becomes invalid. In a main function, the return statement and expression are optional. He also rips off an arm to use as a sword. V3055. Function body contains the 'X' label that is not used by any 'goto' statements. V6024. It is suspicious that the body of 'Foo_1' function is fully equivalent to the body of 'Foo_2' function. V3047. return expressionopt ; The value of expression, if present, is returned to the calling function. Expression is enclosed by parentheses twice: ((expression)). V5626. Thus, the warning is a very useful one and you should consider yourself lucky that the compiler noticed the bug. Consider naming the object. Possible missing parentheses. nlohmann/json.hpp:20925:5: warning: non-void function does not return a value in all control paths [-Wreturn-type], const_reference operator[](const typename object_t::key_type& key) const V2510. The expression, if present, is evaluated and then converted to the type returned by the function. V5003. The standard input/output functions should not be used. V1011. V3183. Comparison with 'double.NaN' is meaningless. Compiler may optimize out this loop or make it infinite. AUTOSAR. V1028. Memory is allocated and released multiple times inside the loop body. V716. V627. Use direct analyzer integration or compiler monitoring instead. Consider using the KK constant. The 'x' variable is assigned to itself. V2019. Do not concatenate string literals with different prefixes. V3555. in your code compiler does not know if the key will not be changed in the call to strlen as you pass a pointer (side effects). V3101. It is possible that there is an error. V6044. The expression of strlen(MyStr.c_str()) kind can be rewritten as MyStr.length(). V3518. . : .' should be used here instead of 'foo = bar = baz ? V558. The report_square function has a void return type, so it doesn't have an expression in its return statement. Consider inspecting the 'foo' function. The function is deprecated in the Win64 system. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Non-void function does not return a value. Storing credentials inside source code can lead to security issues. V3182. V2595. V2557. V611. V665. V727. 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. Microsoft-specific: In the Microsoft C implementation, the long long type is large enough to hold the product of two int values without overflow. The 'SuspendThread' function is usually used when developing a debugger. Already have an account? It is possible that a backslash should be used instead: '\r'. V5622. Consider using the extended version of the 'foo' function here. MISRA. V552. If you cant find an answer to your question, fill in the form below and our developers will contact you. V128. V6071. Returning a value from a void function is a compile error. Size of a pointer is divided by another value. There should be no user-defined variadic functions. The hyperbolic space is a conformally compact Einstein manifold. I am getting this error when trying to compile the below code. OWASP. Learn more about Stack Overflow the company, and our products. V646. The return value of non-void function should be used. Cyclomatic complexity: NN. The alignment rules and type sizes have been changed. Undefined behavior will occur in case of signed integer overflow. 1. Call of the 'Foo' function will lead to buffer underflow. Classes should always be derived from std::exception (and alike) as 'public'. V3152. In this case, we can call either a non-value returning function, or we can call a value-returning function and just ignore the return value. Consider using 'std::move' instead. Suspicious use of BigDecimal class. V1054. Check lines: N1, N2. Its priority is lower than priority of other operators in its left part. MISRA. Consider replacing the use of 'std::optional::value()' with either the '*' or '->' operator. The expression is incorrect or can be simplified. Functions' declarations with 'Foo' name differ in 'const' keyword only, while these functions' bodies have different composition. I am interested to try it on I am trying to understand the C++(GCC compiler) expectation of return statement in a non-void function. V3037. MISRA. V2615. Consider inspecting the 'for' operator. Functions should not be declared at block scope. Check if program logic handles it correctly. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. V831. V6010. Your function should return a vector in every possible condition. V3176. Pseudo random sequence is the same at every program run. Part of conditional expression is always true/false. The 'throw' keyword could be missing. The opposite operator must also be defined. It is safer to use the 'foo' function. The expression is incorrect or it can be simplified. V769. V014. V620. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. The size of the dynamic array can be less than the number of elements in the initializer. V6009. Initializer of a field marked by [ThreadStatic] attribute will be called once on the first accessing thread. This can quickly overflow stack. V3033. V710. V5611. V573. Function with a non-void return type should return a value from all exit paths. My advice would be to create a new option Wreturn-pedantic. The result of '&' operator is always '0'. V1063. Two similar code fragments. Suspicious bitwise operation was detected. In a prior lesson (2.1 -- Introduction to functions), we indicated that the syntax for a function definition looks like this: Although we showed examples of functions that had return-type void, we did not discuss what this meant. Consider inspecting 'X'. V3130. V836. V3552. V685. Possibly, it was intended to be escaped. Can the game be left in an invalid state if all state-based actions are replaced? Use of jump statements in 'finally' block can lead to the loss of unhandled exceptions. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? Perhaps this is a mistake. MISRA. V571. An unconditional 'break/continue/return/goto' within a loop. MISRA. Without re-registering for finalization, destructor will not be called a second time on resurrected object. Only the first member of enumerator list should be explicitly initialized, unless all members are explicitly initialized. Automatic unboxing of a variable may cause NullPointerException. V666. A minor scale definition: am I missing something? Potentially negative value is used as the size of an array. MISRA. This variable is passed by reference to the 'Foo' function in which its value will be used. The 'Foo' pointer is always not equal to NULL. Probably meant: 'new type[n]'. The 'restrict' specifier should not be used. V3175. Implementation of 'compareTo' overloads the method from a base class. V807. MISRA. MISRA. V5627. Unsafe usage of the 'bool' and integer types together in the operation '&='. The main function calls two functions: report_square and report_ratio. Argument is a non-constant reference. It is possible that a typo is present inside the expression. The expression contains a comma. Thus, these functionsdo not result inundefined behavior. Consider inspecting the function call. Check for typos and consider using the 'default:' operator instead. V618. V3522. V3127. Function returns a pointer to the internal string buffer of a local object, which will be destroyed. The return statement may or may not return anything for a void function, but for a non-void function, a return value must be returned. AUTOSAR. See N argument of function 'foo' in derived class 'derived' and base class 'base'. Use of a pointer to FILE when the associated stream has already been closed. Implicit type conversion N argument of function 'foo' to memsize type. So if you want error for specific warning, say -Wreturn-type, just type return-type without -W part as: $ g++ -Werror=return-type source.cpp In general you should always use -Wall option which includes most common warnings this includes missing return statement also. Functions should be declared in prototype form with named parameters. Conversions should not be performed between pointer to function and any other type. V2559. This pattern is suspicious. Logical literal belongs to second operator with a higher priority. Potential division by zero. Implicit assignment type conversion to memsize type. Non-null function pointer is compared to null. The loop counter should not have floating-point type. The object was used before it was verified against null. Decreased performance. V004. V581. Not all members of a class are initialized inside the constructor. MIP Model with relaxed integer constraints takes longer to solve than normal model, why? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. nlohmann/json.hpp:20877:5: warning: non-void function does not return a value in all control paths [-Wreturn-type]. V2515. V1038. String literal contains potential interpolated expression. Return value is not always used. The functions from time.h/ctime should not be used. Why does flowing off the end of a non-void function without returning a value not produce a compiler error? V3017. After each of these function calls, execution continues at the next statement. V3025. See documentation for details. V005. The compiler has been asked to warn when a function has a control path that doesn't return a value (although not mentioned in the message, throwing a value and possibly calling a non-returning function may also be considered acceptable). A component of TimeSpan is used, which does not represent full time interval. Consider inspecting the 'switch' statement. Possible incorrect order of arguments passed to method. Some of the references in project are missing or incorrect. The conditional expressions of the 'if' statements situated alongside each other are identical. String is printed into itself. Thanks for contributing an answer to Stack Overflow! Therefore, printHi is given a void return type. What were the poems other than those by Donne in the Melford Hall manuscript? V826. Class member is initialized with dangling reference. Excessive expression. V6067. V6089. Consider creating a 'T' type object. What happens to the returned value, if one is specified, depends on the implementation. Consider checking the use of this variable. Boundary between numeric escape sequence and string is unclear. Flexible array members should not be declared. Stack of original exception could be lost. Suspicious operation of 'sizeof(X)/sizeof(T)' kind, where 'X' is of the 'class' type. Allocation of memory by the pattern "(X*)malloc(sizeof(Y))" where the sizes of X and Y types are not equal. V3517. Here is a full example. V3510. V3097. What differentiates living as mere roommates from living in a marriage-like relationship? Array is used as pointer to single object. An array/object was declared but was not utilized. The argument should probably be rendered as a constant pointer/reference.
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