c++ - Meta Regex: test if regex is only a string (no regex "wildcards") -

i have (assumed formed) regex expresion r. want test if regex expression single match (all letters, numbers, , escaped expressions) or swapped else. function, "haswildcards", work this:

bool = haswildcards("asdf");//returns false bool b = haswildcards("asdf*");//returns true bool c = haswildcards("asdf[123]");//returns true bool d = haswildcards("asdf\\[123\\]");//returns false 

i using boost::regex, if helps @ all. thinking of checking if regex expression matches this:

(^(([\[\^\$\.\|\?\*\+\(\{\}])))?(\\[qedwsdwsbazzb])?([^\\][\[\^\$\.\|\?\*\+\(\)\{\}])? 

i've tested on few expressions (using regextest tool of grepwin)

so non-escaped regex symbol start, non-escaped flag,non-escaped regex sumbol in body. there alternative? did screw up? there better way?

well, there's quick two-step way test this. instead of testing escaped characters and wildcards in 1 regex, first line of function remove escaped characters, second line test remaining string wildcard-type expressions.

.*((\[.+?\])|(\{[0-9]*,[0-9]*\})|(\*)|(\+)).* 

will match string contains *, +, {#,#}, or [] expression. in function, return whether or not passed string matches expression.