Relational operators and plain chars and wchar_t

[gs]

The documentation for MISRA C++ rule #4-5-3 includes the following:

The relational operators = may be used to determine if a character (or wide character) represents a digit.

The document then includes several examples which demonstrate compliance (or lack thereof) for the '>=' and '

[misra cpp]

The use of "" is permitted. For example:

Code:

if ( ( x < '0' ) || ( x > '9' ) )
{
   /* Not a digit */
}