optparse VS ucd-generate

Between -std=c99 and removing these headers, you're missing time definitions (struct timeval, gettimeofday) and option parsing definitions (struct option, getopt_long). Mingw-w64 provides all this for compatibility, but MSVC has none of these, so you'll need to write replacements. I've written embeddable, public domain implementations of getopt and something like getopt_long, in case that helps. These are how I deal with option parsing portability.

getopt_long is a GNU extension, common across unix-like systems, for parsing long options. You can find libraries for functionality as well.

When I need something more sophisticated, where long options would be nice, I reach for my own Optparse.

https://github.com/skeeto/optparse (short and long)

This is bug-free and feature complete so it never needs to be updated. When I need argument parsing in a C program, I just copy-paste that into my source and massage it into place. Sometimes I cut the fprintf() stuff, or replace the isalnum, or otherwise adapt it to fit the program's needs. The point is that it becomes wholly owned by the project using it. It's a similar story for long option parsing.

So you're saying that the 'expect()' message when a regex compilation error occurs should be a translation from a terse domain specific language to bloviating prose? :-)

What 'expect()' message would you write for this regex? https://github.com/BurntSushi/ucd-generate/blob/6d3aae3b8005...

I think 'unwrap()' there is perfectly appropriate.

> I think it'd be desirable to have a `.unwrap_with_context("Context: {}")`, and the you'd get `Context: Inner Panic Info`.

Why?

I've also embedded Unicode tables a number of times. It's very easy to do, and I do it enough that I even have a tool to do it. Having tooling and scripts to do it is important for reasons of provenance and also for when the tables need to be updated (every year or so).

ucd-generate for generating Unicode tables. It is what the regex crate uses to generate all of its tables, and it supports many properties already. It also provides a way to represent Unicode character names in a compressed data structure.