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CodeSonar® 9.2p0 CONFIDENTIAL CodeSecure Inc
C and C++


LANG.STRUCT.EXCP.NOX : Missing noexcept

Summary

One of the following is declared, but is not explicitly or implicitly noexcept.

These functions should not throw any exceptions.

Properties

Class Name Missing noexcept
Significance reliability
Mnemonic LANG.STRUCT.EXCP.NOX
Categories
AUTOSARC++14 AUTOSARC++14:A15-4-4 A declaration of non-throwing function shall contain noexcept specification.
  AUTOSARC++14:A18-1-6 All std::hash specializations for user-defined types shall have a noexcept function call operator.
MisraC++2023 MisraC++2023:18.4.1 Exception-unfriendly functions shall be noexcept
Availability Available for C++ only (not C).
Enabling Checks for this warning class are disabled by default, and require the unnormalized C ASTs for the project. To enable them, add the following WARNING_FILTER rule and RETAIN_UNNORMALIZED_C_AST specification to the project configuration file.
RETAIN_UNNORMALIZED_C_AST = Yes
WARNING_FILTER += allow class="Missing noexcept"
Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Example

#include <functional>
#include <stdexcept>

class A{};
class B{};

class C : public std::exception {
  public:
    C(const C& other);                          // 'Missing noexcept' warning issued here
};

class D  {
  public:
    ~D(void);                                                                   // ok (noexcept by default)
    D(const D& other);                                                          // ok (not an exception class)
    D(D&& other) noexcept(true);                                                // ok
    D& operator==(D&& other) noexcept;                                          // ok
};

class E {
  public:
    ~E(void) noexcept(false);                   // 'Missing noexcept' warning issued here
    E(E&& other);                               // 'Missing noexcept' warning issued here
    E& operator=(E&& other){};                  // 'Missing noexcept' warning issued here
    void swap(size_t a, size_t b);              // 'Missing noexcept' warning issued here
};

namespace std {
    template <>
    struct hash<A> {
      std::size_t operator()(const A& a) const noexcept(true);                  // ok
    };

    template <>
    struct hash<B> {
      std::size_t operator()(const B& b) const; // 'Missing noexcept' warning issued here
    };
}

void swap(size_t A, size_t B);                  // 'Missing noexcept' warning issued here

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.

 

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