Version 1.6: Formatting help
Added a new formatting system [#109]. You can now set the formatter on Apps. This has also simplified the internals of Apps and Options a bit by separating most formatting code.
* Added `CLI::Formatter` and `formatter` slot for apps, inherited.
* `FormatterBase` is the minimum required.
* `FormatterLambda` provides for the easy addition of an arbitrary function.
* Added `help_all` support (not added by default).
Changes to the help system (most normal users will not notice this):
* Renamed `single_name` to `get_name(false, false)` (the default).
* The old `get_name()` is now `get_name(false, true)`.
* The old `get_pname()` is now `get_name(true, false)`.
* Removed `help_*` functions.
* Protected function `_has_help_positional` removed.
* `format_help` can now be chained.
* Added getters for the missing parts of options (help no longer uses any private parts).
* Help flags now use new `short_circuit` property to simplify parsing. [#121]
New for Config file reading and writing [#121]:
* Overridable, bidirectional Config.
* ConfigINI provided and used by default.
* Renamed ini to config in many places.
* Has `config_formatter()` and `get_config_formatter()`.
* Dropped prefix argument from `config_to_str`.
* Added `ConfigItem`.
* Added an example of a custom config format using [nlohmann/json]. [#138]
Validators are now much more powerful [#118], all built in validators upgraded to the new form:
* A subclass of `CLI::Validator` is now also accepted.
* They now can set the type name to things like `PATH` and `INT in [1-4]`.
* Validators can be combined with `&` and `|`.
* Old form simple validators are still accepted.
Other changes:
* Fixing `parse(args)`'s `args` setting and ordering after parse. [#141]
* Replaced `set_custom_option` with `type_name` and `type_size` instead of `set_custom_option`. Methods return `this`. [#136]
* Dropped `set_` on Option's `type_name`, `default_str`, and `default_val`. [#136]
* Removed `set_` from App's `failure_message`, `footer`, `callback`, and `name`. [#136]
* Fixed support `N<-1` for `type_size`. [#140]
* Added `->each()` to make adding custom callbacks easier. [#126]
* Allow empty options `add_option("-n",{})` to be edited later with `each` [#142]
* Added filter argument to `get_subcommands`, `get_options`; use empty filter `{}` to avoid filtering.
* Added `get_groups()` to get groups.
* Better support for manual options with `get_option`, `set_results`, and `empty`. [#119]
* `lname` and `sname` have getters, added `const get_parent`. [#120]
* Using `add_set` will now capture L-values for sets, allowing further modification. [#113]
* Dropped duplicate way to run `get_type_name` (`get_typeval`).
* Removed `requires` in favor of `needs` (deprecated in last version). [#112]
* Const added to argv. [#126]
Backend and testing changes:
* Internally, `type_name` is now a lambda function; for sets, this reads the set live. [#116]
* Cleaner tests without `app.reset()` (and `reset` is now `clear`). [#141]
* Better CMake policy handling. [#110]
* Includes are properly sorted. [#120]
* Testing (only) now uses submodules. [#111]
[#109]: https://github.com/CLIUtils/CLI11/pull/109
[#110]: https://github.com/CLIUtils/CLI11/pull/110
[#111]: https://github.com/CLIUtils/CLI11/pull/111
[#112]: https://github.com/CLIUtils/CLI11/pull/112
[#113]: https://github.com/CLIUtils/CLI11/issues/113
[#116]: https://github.com/CLIUtils/CLI11/pull/116
[#118]: https://github.com/CLIUtils/CLI11/pull/118
[#119]: https://github.com/CLIUtils/CLI11/pull/119
[#120]: https://github.com/CLIUtils/CLI11/pull/120
[#121]: https://github.com/CLIUtils/CLI11/pull/121
[#126]: https://github.com/CLIUtils/CLI11/pull/126
[#127]: https://github.com/CLIUtils/CLI11/pull/127
[#138]: https://github.com/CLIUtils/CLI11/pull/138
[#140]: https://github.com/CLIUtils/CLI11/pull/140
[#141]: https://github.com/CLIUtils/CLI11/pull/141
[#142]: https://github.com/CLIUtils/CLI11/pull/142
[nlohmann/json]: https://github.com/nlohmann/json
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