Use of `mut self` in builders about log4rs HOT 4 CLOSED

You can use them in separate statements:

let mut builder = Config::builder()
    .test_on_check_out(false);
builder = builder.helper_threads(10);
let config = builder.build();

The config contains a couple of bits of owned/non-cloneable data so build can't take &self as the bottom of the section you linked discusses: https://aturon.github.io/ownership/builders.html#consuming-builders:

from log4rs.

Yeah, sorry, got muddled on that bit 😅 (really sorry for the mistake!) The article still seems to reccomend the &mut pattern though. I think this is what derive-builder uses too

from log4rs.

This would remove the need to keep setting the builder in statement form

from log4rs.

Not sure this is still relevant in 2019... the blog post is gone though.

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