The crex from octobanana

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[Feature request]: Regex formatter

Since the regular expression is already being parsed, I was wondering if it would be possible to use this to create a pretty-printer/formatter?

A reason for this would be a massive regular expression like the following one, which I use with neomutt to capture all variations of a URL.

([a-z][a-z0-9+-]*://(((([a-z0-9_.!~*'();:&=+$,-]|%[0-9a-f][0-9a-f])*@)?((([a-z0-9]([a-z0-9-]*[a-z0-9])?)\\.)*([a-z]([a-z0-9-]*[a-z0-9])?)\\.?|[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+)(:[0-9]+)?)|([a-z0-9_.!~*'()$,;:@&=+-]|%[0-9a-f][0-9a-f])+)(/([a-z0-9_.!~*'():@&=+$,-]|%[0-9a-f][0-9a-f])*(;([a-z0-9_.!~*'():@&=+$,-]|%[0-9a-f][0-9a-f])*)*(/([a-z0-9_.!~*'():@&=+$,-]|%[0-9a-f][0-9a-f])*(;([a-z0-9_.!~*'():@&=+$,-]|%[0-9a-f][0-9a-f])*)*)*)?(\\?([a-z0-9_.!~*'();/?:@&=+$,-]|%[0-9a-f][0-9a-f])*)?(#([a-z0-9_.!~*'();/?:@&=+$,-]|%[0-9a-f][0-9a-f])*)?|(www|ftp)\\.(([a-z0-9]([a-z0-9-]*[a-z0-9])?)\\.)*([a-z]([a-z0-9-]*[a-z0-9])?)\\.?(:[0-9]+)?(/([-a-z0-9_.!~*'():@&=+$,]|%[0-9a-f][0-9a-f])*(;([-a-z0-9_.!~*'():@&=+$,]|%[0-9a-f][0-9a-f])*)*(/([-a-z0-9_.!~*'():@&=+$,]|%[0-9a-f][0-9a-f])*(;([-a-z0-9_.!~*'():@&=+$,]|%[0-9a-f][0-9a-f])*)*)*)?(\\?([-a-z0-9_.!~*'();/?:@&=+$,]|%[0-9a-f][0-9a-f])*)?(#([-a-z0-9_.!~*'();/?:@&=+$,]|%[0-9a-f][0-9a-f])*)?)[^].,:;!)? \t\r\n<>\"]

If I were to be able to format this regular expression, it would be much easier to deal with if I needed to modify it.

[Feature request] Interactive / live-edit mode

Hi, I found your project on Reddit and it looks great. But I can't get it to work:

12:09:15 /opt/crex (master|✔) ./build.sh

Setting Environment Variables

Building crex in Debug mode

Compiling crex
ccache found
CMAKE_BUILD_TYPE is Debug
-- Configuring done
-- Generating done
-- Build files have been written to: /opt/crex/build/debug
[100%] Built target crex

real    0m0,022s
user    0m0,013s
sys     0m0,009s
12:09:20 /opt/crex (master|✔) env APP=crex /opt/crex/build/debug/crex
12:09:33 /opt/crex (master|✔) ✘ echo $status
1

This is on Ubuntu 18.04.1. Ideas?

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