PARSE.LSNU : Literal Suffix No Underscore

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CodeSonar^® 9.2p0

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C and C++

PARSE.LSNU : Literal Suffix No Underscore

Summary

A user-defined literal suffix does not begin with an underscore (_).

This warning class is derived from a C/C++ parser warning.

Properties

Class Name

Literal Suffix No Underscore

Significance

style

Mnemonic

PARSE.LSNU

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.
MisraC++2023	MisraC++2023:5.10.1	User-defined identifiers shall have an appropriate form

Availability

Available for C++ only (not C).

Enabling

Checks for this warning class are enabled by default. However, warning instances of this class that are issued as parser errors (rather than parser warnings) will be discarded when using factory configuration settings. To prevent these instances from being discarded, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += allow class="Literal Suffix No Underscore"

To disable checks for this warning class, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += discard class="Literal Suffix No Underscore"

Example

constexpr long double operator"" _ap (long double apples){            // ok: suffix begins with underscore
    return apples;
}

constexpr long double operator"" og (long double oranges){ // 'Literal Suffix No Underscore' warning issued here
    return oranges;
}

Relevant Configuration File Parameters

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

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