bpaf_derive

• bugfix with zsh autocomplete #46
• reimplement bpaf derive - should be faster to compile and easier to work with

• minor doc fixes
• bugfix for dynamic completion

• invariant checker - for tests
• more error message improvements
• non-utf8 support in --foo=bar / -f=bar
• dynamic shell completion: bash, zsh, fish, elvish
• toggle flag battery
• templated usage string: can use "{usage}" in custom overrides

and a bit more cosmetics - preserve suggestion context when returning from a subcommand

• fix a regression in error messaged caused by 0.5.1
• guard now displays the problematic input if it's a single argument issue

improve error messages if argument parsing fails:

• matcher no longer escapes inner command if it gets there
• detect and try to suggest for possible typos

should be faster to compile and a bit more flexible with respect to what is accepted

Braking changes

• explicit construct annotation is gone and used by default if options and command are missing
• options and command now must be specified at the beginning of #[bpaf(... macro
• default annotation for enum variants is gone, you can use fallback on top instead

• cargo_helper, hide + cosmetic bugfixes

• parsers produced by functions inside construct!() macro

• optimizations
• renamed Parser::help to Parser::group_help to reduce confusion

• publish API for users to write tests for parsers

First public release

• docs type: option -> optional
• metavar name for positional, positional_os, argument, argument_os is now optional
• bpaf_derive is now more strict about derive attribute parsing
• derived items can be made module private
• env is now supported

• deriving for version should be working now

• support for version and version(expr) annotations on a top level
• improve help generation from doc comments