The converters are hooked up, including some weird magic under the hood
to automatically handle multi-values as well as the many-to-one case
of the structure. The many-to-many case of arrays/slices is not
currently handled, but it should be straightforward to do.
Hooking up subcommands should be pretty straightforward if I've
designed this correctly, so that will be next. The final major piece
of the puzzle is help text generation, which in theory can be largely
carried over from the old implementation.
The error handling is very poorly done right now as well, and I need to
figure out a strategy. My plan for converters is to pass in a writable
buffer that the parser owns that they can write messages to when they
fail, to provide useful context. I will need to figure out how this
works for recursive converters (e.g. the struct converter) since the
failure happens inside-out, but the error message will read much
better if it's composed outside-in. There are many ways to tackle this.
The code will also need to be restructured to not be a monolithic 1000
line file.
Had to refactor the multi-value parameter stuff to push some of the key
information in to the generics structure, as they necessarily change
the conversion function signature. Some code has gotten folded
together by being a bit sloppier with inputs and outputs.
This should put us well on our way to having functioning value
conversion, which I think is the main major feature remaining besides
help text generation. Hopefully I won't need to rewrite everything
like this again. While this design seems to be on track to incorporate
all of the main features I am interested in, it has been a lot of work
to wrangle it around, and there is still a lot of work left before I
can put a bow on it.
Also work on a generic runtime parser interface for attaching
subcommands. This will allow subcommands to live in a mapping or
something at runtime which will simplify their use.
This is basically a full rewrite but with a much more solid concept of
what the public API looks like, which has informed some of the
lower-level decisions. This is not at feature parity with the main
branch yet, but it does handle some things better. The main
functionality missing is the help text generation and subcommands.
There's still some design to think about on the subcommand side of
things.
