Add formatted printing directly into std.Buffer

[justinbalexander]

No description provided.

[andrewrk]

We used to have this, and removed it in favor of One Way To Do Things (create a stream from the buffer).

However, upon reconsidering, I think this API shortcut is welcome here.

Just one little thing to fix and then this is merge-ready.

[daurnimator]

We used to have this, and removed it in favor of One Way To Do Things (create a stream from the buffer).

However, upon reconsidering, I think this API shortcut is welcome here.

I disagree. std.Buffer is unfortunately used in several places that don't make sense (probably because of the name?). e.g. there is no reason for readUntilDelimiterAlloc to use a std.Buffer.
Perhaps we should rename it to ZeroTerminatedArrayList or similar to make its differentiating property more obvious?

[justinbalexander]

It was totally the name that made me pick it originally. I ended up going with a different solution.

[justinbalexander]

What should I do about the windows build timing out?

Also @daurnimator , the Buffer has a convenient api for string operations such as:

startsWith
endsWith
eql

For someone browsing the standard library, it seems to be the obvious choice.

Is the ArrayList preferred for holding variable length u8's?

[daurnimator]

Also @daurnimator , the Buffer has a convenient api for string operations such as:

startsWith
endsWith
eql

For someone browsing the standard library, it seems to be the obvious choice.

Adding in #4405

Is the ArrayList preferred for holding variable length u8's?

Yes. Or LinearFifo if you ever need to delete data from the start.

[andrewrk]

Thanks!