<![CDATA[MISRA Discussion Forums - 6.4 Character Sets]]>

<![CDATA[MISRA Discussion Forums - 6.4 Character Sets]]> https://forum.misra.org.uk/ Thu, 05 Nov 2026 15:13:38 +0000 MyBB <![CDATA[Acceptable Escape Sequences?]]> https://forum.misra.org.uk/showthread.php?tid=499 Fri, 25 Apr 2008 13:24:02 +0000 gs]]> https://forum.misra.org.uk/showthread.php?tid=499 Rule 4.1 states

Quote:Only those escape sequences that are defined in the ISO C standard shall be used.

The explanatory text then refers the Reader to section 5.2.2 of the C99 Standard for a list of escape sequences. However, 6.4.4.4 also defines an escape-sequence syntax as

Code:
escape-sequence:

       simple-escape-sequence

       octal-escape-sequence

       hexadecimal-escape-sequence

       universal-character-name

and a hexadecimal-escape-sequence as

Code:
hexadecimal-escape-sequence:

       \x hexadecimal-digit

       hexadecimal-escape-sequence hexadecimal-digit

The use of '\x' i not mentioned in 5.2.2 as a valid escape-sequence. Are hexadecimal escape-sequences permitted under MISRA 2004 Rule 4.1?]]> Rule 4.1 states

Quote:Only those escape sequences that are defined in the ISO C standard shall be used.

The explanatory text then refers the Reader to section 5.2.2 of the C99 Standard for a list of escape sequences. However, 6.4.4.4 also defines an escape-sequence syntax as

Code:
escape-sequence:

       simple-escape-sequence

       octal-escape-sequence

       hexadecimal-escape-sequence

       universal-character-name

and a hexadecimal-escape-sequence as

Code:
hexadecimal-escape-sequence:

       \x hexadecimal-digit

       hexadecimal-escape-sequence hexadecimal-digit

The use of '\x' i not mentioned in 5.2.2 as a valid escape-sequence. Are hexadecimal escape-sequences permitted under MISRA 2004 Rule 4.1?]]>