uellenberg / rexs

A language for writing regular expressions.

REXS

REXS is a language to create regular expressions. It can be used to create more readable and easy-to-modify expressions that compile to clean and readable regular expressions.

For more information on REXS' syntax (or how to use it), take a look at https://esolangs.org/wiki/REXS.

Example

An example usage of REXS can be to match on any URL that starts with http:// or https://, then match any subdomains, followed by the domain and .com:

assert(START);

match("http");

repeat(0, 1) {
    match("s");
}

match("://");

repeat(0, inf, nongreedy) {
    repeat(1, inf, nongreedy) {
        match(ANY);
    }
    match(".");
}

group() {
    repeat(1, inf, nongreedy) {
        match(ANY);
    }

    match(".com");
}

assert(END);

This example will be compiled to /^https?:\/\/(?:.+?\.)*?(.+?\.com)$/.

rexs's Issues

Regex language diffs?

I like the idea of this project and think that it is helpful to easily and informatively create regular expression statements. My question is whether this is able to deal with the differences between regex languages. .NET, Perl, Python, etc, all have slightly different syntax and available syntax sugar which may or may not make the output of this project work for them.

Have you considered the differences? I could not find anything in the documentation to state what the output should be for.