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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 674
  • Vulnerability13
  • Bug139
  • Security Hotspot19
  • Code Smell503

  • Quick Fix 91
Filtered: 24 rules found
performance
    Impact
      Clean code attribute
        1. "std::format" should be used instead of standard output manipulators

           Code Smell
        2. Concatenated "std::format" outputs should be replaced by a single invocation

           Code Smell
        3. Use conditional suspension to resume current coroutine

           Code Smell
        4. rvalue reference members should not be copied accidentally

           Code Smell
        5. "std::string_view" and "std::span" parameters should be directly constructed from sequences

           Code Smell
        6. Empty class members should be marked as "[[no_unique_address]]"

           Code Smell
        7. Transparent function objects should be used with associative "std::string" containers

           Code Smell
        8. "emplace" should be prefered over "insert" with "std::set" and "std::unordered_set"

           Code Smell
        9. Unnecessary expensive copy should be avoided when using auto as a placeholder type

           Code Smell
        10. "try_emplace" should be used with "std::map" and "std::unordered_map"

           Code Smell
        11. Heterogeneous sorted containers should only be used with types that support heterogeneous comparison

           Bug
        12. Objects should not be created solely to be passed as arguments to functions that perform delegated object creation

           Code Smell
        13. "std::filesystem::path" should be used to represent a file path

           Code Smell
        14. Emplacement should be preferred when insertion creates a temporary with sequence containers

           Code Smell
        15. Return type of functions shouldn't be const qualified value

           Code Smell
        16. "std::endl" should not be used

           Code Smell
        17. Capture by reference in lambdas used locally

           Code Smell
        18. "std::move" should not inhibit optimizations

           Code Smell
        19. Template parameters should be preferred to "std::function" when configuring behavior at compile time

           Code Smell
        20. Special member function should not be defined unless a non standard behavior is required

           Code Smell
        21. Member data should be initialized in-class or in a constructor initialization list

           Code Smell
        22. Bit fields should not be used

           Code Smell
        23. The prefix increment/decrement form should be used

           Code Smell
        24. Pass by reference to const should be used for large input parameters

           Code Smell

        "std::filesystem::path" should be used to represent a file path

        intentionality - clear
        maintainability
        Code Smell
        • performance
        • since-c++17
        • clumsy

        Why is this an issue?

        More Info

        Introduced in C++17, the class std::filesystem::path can store a file path. Compared to a regular string, it offers several advantages:

        • Having a dedicated type makes the intention clear
        • This class stores the path with an encoding that is appropriate to the OS where the program runs
        • It provides several functions that make it more convenient to manipulate than a string (for instance, operator/ for concatenations)
        • It provides a normalized way to specify the path, easing the portability of the code (on Windows and Linux, the native way is equivalent to the normalized way, which reduces overhead).

        This rule raises an issue when the same string is converted several times to a path because it indicates that a single path object could have been used in all occurrences. It can also be more efficient since conversion from string to path may require a change of encoding and memory allocation.

        Noncompliant code example

        std::string getUserData();
        namespace fs = std::filesystem;
        void f() {
          std::string const filePath = getUserData();
          if (fs::exists(filePath)) {
            logTime(fs::last_write_time(filePath)); // Noncompliant
          }
        }
        

        Compliant solution

        std::string getUserData();
        namespace fs = std::filesystem;
        void f() {
          fs::path const filePath = getUserData();
          if (fs::exists(filePath) {
            logTime(fs::last_write_time(filePath)); // Compliant
          }
        }
        
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