LANG.FUNCS.UDLO : User-defined Literal Operator

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CodeSonar^® 9.2p0

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C and C++

LANG.FUNCS.UDLO : User-defined Literal Operator

Summary

A user-defined literal operator is declared.

Properties

Class Name

User-defined Literal Operator

Significance

style

Mnemonic

LANG.FUNCS.UDLO

Categories

AUTOSARC++14	AUTOSARC++14:A13-1-2	User defined suffixes of the user defined literal operators shall start with underscore followed by one or more letters.
	AUTOSARC++14:A13-1-3	User defined literals operators shall only perform conversion of passed parameters.
CWE	CWE:1076	Insufficient Adherence to Expected Conventions

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="User-defined Literal Operator"

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

typedef long double inches;

constexpr inches operator"" _ft(long double ft) {  // 'User-defined Literal Operator' warning issued here
    return ft * 12.0;
}

constexpr inches operator"" _yds(long double yds); // 'User-defined Literal Operator' warning issued here

Relevant Configuration File Parameters

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

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