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C

C static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C code

  • All rules 315
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  • Code Smell207

  • Quick Fix 19
Filtered: 9 rules found
obsolete
    Impact
      Clean code attribute
        1. Digraphs should not be used

           Code Smell
        2. Trigraphs should not be used

           Code Smell
        3. GNU extensions should not be used

           Code Smell
        4. Increment should not be used to set boolean variables to 'true'

           Code Smell
        5. Obsolete POSIX functions should not be used

           Code Smell
        6. Code annotated as deprecated should not be used

           Code Smell
        7. Deprecated K&R syntax should not be used for function definition

           Code Smell
        8. Deprecated code should be removed

           Code Smell
        9. Deprecated attributes should include explanations

           Code Smell

        Code annotated as deprecated should not be used

        consistency - conventional
        maintainability
        Code Smell
        • cwe
        • obsolete
        • cert

        Why is this an issue?

        More Info

        Code is sometimes annotated as deprecated by developers maintaining libraries or APIs to indicate that the method, class, or other programming element is no longer recommended for use. This is typically due to the introduction of a newer or more effective alternative. For example, when a better solution has been identified, or when the existing code presents potential errors or security risks.

        Deprecation is a good practice because it helps to phase out obsolete code in a controlled manner, without breaking existing software that may still depend on it. It is a way to warn other developers not to use the deprecated element in new code, and to replace it in existing code when possible.

        Deprecated classes, interfaces, and their members should not be used, inherited or extended because they will eventually be removed. The deprecation period allows you to make a smooth transition away from the aging, soon-to-be-retired technology.

        Check the documentation or the deprecation message to understand why the code was deprecated and what the recommended alternative is.

        // C++14 attribute
        [[deprecated("Use newFunction instead.")]]
        void oldFunction();
        
        // GNU attribute
        __attribute__((deprecated("Use newFunction instead.")))
        void oldFunction();
        
        // Microsoft attribute
        __declspec(deprecated("Use newFunction instead."))
        void oldFunction();
        
        void newFunction();
        
        void example() {
          oldFunction(); // Noncompliant
        }
        
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