Re: [Boost-users] Validating file names using regex

From: John Maddock (john_at_[hidden])
Date: 2006-04-13 13:03:27

> In the (^([a-z]:\\?) I want to make the last \ optionnal not to have
> a literal ?.
>
> Should I change this to: "(^([a-z]:\\\?)" ?

The the one thing you should not do :-)

If the string is embedded in your program as a string literal, then the 
compiler will replace each \\ with \ before regex sees it, so "\\?" matches 
a literal "?" and "\\\\?" is an optional backslash.

Of course all your other backslashes may need doubling up as well if you 
intend them to be literal backslashes rather than regex-escapes :-)

John.