PARSE.UNICP : Universal Character Name Names Invalid Code Point

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CodeSonar^® 9.2p0

CONFIDENTIAL

CodeSecure Inc

C and C++

PARSE.UNICP : Universal Character Name Names Invalid Code Point

Summary

A universal character specified with \U does not represent a valid Unicode code point.

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

Properties

Class Name

Universal Character Name Names Invalid Code Point

Significance

style

Mnemonic

PARSE.UNICP

Categories

Misra2004	Misra2004:4.1	Only those escape sequences that are defined in the ISO C standard shall be used
AUTOSARC++14	AUTOSARC++14:A2-13-1	Only those escape sequences that are defined in ISO/IEC 14882:2014 shall be used.
MisraC++2008	MisraC++2008:2-13-1	Only those escape sequences that are defined in ISO/IEC 14882:2003 shall be used.
MisraC++2023	MisraC++2023:5.13.1	Within character literals and non raw-string literals, \ shall only be used to form a defined escape sequence or universal character name

Availability

Available for C and 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="Universal Character Name Names Invalid Code Point"

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

WARNING_FILTER += discard class="Universal Character Name Names Invalid Code Point"

Example

#include <stddef.h>

wchar_t invalid_codepoint_wch = L'\U00A00000';     /* 'Universal Character Name Names Invalid Code Point' warning issued here
                                                    * - \U00A00000 does not correspond to a valid code point
                                                    */
wchar_t valid_codepoint_wch = L'\U000000F6';                                /* ok: \U000000F6 is a valid code point */

char *invalid_codepoint_str = "hello \U00999999";  /* 'Universal Character Name Names Invalid Code Point' warning issued here
                                                    * - \U00999999 does not correspond to a valid code point
                                                    */
char *valid_codepoint_str = "hello \U000000E9";                             /* ok: \U000000E9 is a valid code point */

Relevant Configuration File Parameters

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

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