File starting with a Byte Order Mark leads to UB

[Delian0]

Some character encodings, such as UTF-8, can start with a BOM. Rapid YAML currently does not give these any consideration.

[Delian0]

Could you elaborate on why it's better if the user does BOM skipping manually instead of it happening automatically during parsing?

[biojppm]

In fact dumping this on the user was not conforming to the standard. Working now on the implementation.

[Delian0]

Thanks. Coming from yaml-cpp, it did work automatically there before.

The standard says that double-quoted scalars can also contain BOMs. While I have encountered files containing a BOM before, I've never once seen double-quoted scalars having them, not even in JSON. So I think it's fine to leave such exceptional cases to the user.