Description Class RW CRExpr represents an extended regular expression such as those found in lex and awk . The results can then be used for string searches using class RW CString .
Regular expressions can be of arbitrary size, limited by memory.
A range of characters can be indicated with a dash. It does not match the empty string. The caret loses its special meaning if it is not the first character of the set. The concatenation of REs is a RE that matches the corresponding concatenation of strings. You must assign a pattern to the regular expression before you use it.