LANG.TYPE.MSUF : Missing Literal Suffix

JavaScript is not currently enabled, but is required for full CodeSonar manual search and browse functionality.

If you are viewing this file in your hub's Web GUI, enable JavaScript in your browser: you will also need it for GUI functionality.

If you opened this file directly from disk, your browser may be directly suppressing JavaScript functionality: certain browsers perform this suppression on local files (but not files delivered by web servers) for security reasons.

If you access the manual through the hub's Web GUI, the functionality will not be suppressed because the hub is a web server.
Alternatively, your browser may allow you to explicitly disable the security setting that suppresses functionality. See the CodeSonar FAQ for more information.

An integer constant does not have a 'U' or 'u' suffix, but is of unsigned type.

The type of a constant is determined from its value and format, and from whether the code is compiled as C90 or C99.

Class Name

Missing Literal Suffix

Significance

style

Mnemonic

LANG.TYPE.MSUF

Categories

MisraC2023	MisraC2023:7.2	A "u" or "U" suffix shall be applied to all integer constants that are represented in an unsigned type
Misra2012	Misra2012:7.2	A "u" or "U" suffix shall be applied to all integer constants that are represented in an unsigned type
Misra2004	Misra2004:10.6	A "U" suffix shall be applied to all constants of unsigned type
AUTOSARC++14	AUTOSARC++14:M2-13-3	A "U" suffix shall be applied to all octal or hexadecimal integer literals of unsigned type.
MisraC++2008	MisraC++2008:2-13-3	A "U" suffix shall be applied to all octal or hexadecimal integer literals of unsigned type.
MisraC++2023	MisraC++2023:5.13.4	Unsigned integer literals shall be appropriately suffixed

Availability

Available for C and 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 Literal Suffix"

Note that retaining the unnormalized ASTs will increase the disk space used to store the project representation, and may make the analysis take longer.

Suppose the following code is compiled to a target with 32-bit integers.

unsigned int ui1 = 0xF;                          /* signed int */
unsigned int ui2 = 0xFFFFFFF;                    /* signed int */
unsigned int ui3 = 0xFFFFFFFFu;                  /* unsigned int with 'u' suffix */
unsigned int ui4 = 037777777777; /* 'Missing Literal Suffix' warning issued here */
unsigned int ui5 = 4294967295;   /* 'Missing Literal Suffix' warning issued here for C90 only (not C99) */

int fA(int i){return i;}

void fB(void){
  fA(0xF);                                       /* signed int */
  fA(0xFFFFFFFF);                /* 'Missing Literal Suffix' warning issued here */
}

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

LANG.TYPE.MSUF : Missing Literal Suffix

Summary

Properties

Example

Relevant Configuration File Parameters