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A safe and fast high-level and low-level character input/output library for bare-metal and RTOS based embedded systems with a very small binary footprint.

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Hi, I added custom formater and now I'm getting warnings during build. It happens with the emio main branch version. ``` [build] emio/include/emio/detail/args.hpp: In constructor 'emio::detail::args_span_with_str::args_span_with_str(const emio::detail::validated_string_storage&, std::span) [with Arg...

https://github.com/boost-ext/ut Q: Why? A: Because it's C++20. :)

enhancement

Doesn't need to be 100 % non breakable but it would be good to make some basic decisions. **Every help is welcome! :)** - [ ] is the naming of...

- [x] Check if [dragonbox](https://github.com/jk-jeon/dragonbox) has an acceptable binary size (for single and double precision) - [x] If not, find an alternative - [ ] implement the low-level writer API...

I think UTF-8 is mostly supported out of box but this is missing: - [ ] allow a utf-8 conform fill character ```cpp CHECK(emio::format("{0:ж>4}", 42) == "жж42") ``` - [...

Probably a similar implementation like fmt. - [ ] low-level writer API - [ ] high-level format API

- [ ] Which parts of the code could be further optimized for size? [Bloaty McBloatface](https://github.com/google/bloaty) could help here.