LANG.FUNCS.CONE : Conversion Operator Not Explicit

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CodeSonar^® 9.2p0

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C and C++

LANG.FUNCS.CONE : Conversion Operator Not Explicit

Summary

A user-defined conversion operator is declared without explicit

Properties

Class Name

Conversion Operator Not Explicit

Significance

style

Mnemonic

LANG.FUNCS.CONE

Categories

AUTOSARC++14	AUTOSARC++14:A13-5-2	All user-defined conversion operators shall be defined explicit.
	AUTOSARC++14:A13-5-3	User-defined conversion operators should not be used.
MisraC++2023	MisraC++2023:15.1.3	Conversion operators and constructors that are callable with a single argument shall be explicit
CWE	CWE:704	Incorrect Type Conversion or Cast
JSF++	JSF++:177	User-defined conversion functions should be avoided.

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="Conversion Operator Not Explicit"

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

class A {
  public:
    operator int() const { /* 'Conversion Operator Not Explicit' warning issued here */
        return d > 0;
    }
    explicit operator double() const {                      /* declared explicit */
        return d;
    }
  private:
    double d;
};

Relevant Configuration File Parameters

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

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