implement PartialEq, Eq and Hash

[ashfordneil]

Without these traits being implemented, it is difficult to store Regex structs, or types containing them, in collections such as HashSet and HashMap. It also prevents any type containing a Regex from automatically deriving these traits. Would it be okay to implement these traits for the Regex struct, perhaps just using the as_str() function and performing comparisons / hashes on the output of that?

[BurntSushi]

regex 0.1 had this impl, but I removed it. It's way too misleading because finite state machines actually have a concept of equality that is very different from "do these regex strings match."

You should solve this by putting your Regex in a newtype and deriving the traits you want.

[BurntSushi]

See #178 and #313

[therustmonk]

Information for those who got here. A naive comparison can be implemented this way:

struct Wrapper {
    regex: Regex,
}

impl PartialEq for Wrapper {
    fn eq(&self, other: &Self) -> bool {
        self.regex.as_str() == other.regex.as_str()
    }
}