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Try get methods for buf #753

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@hpenne hpenne commented Jan 8, 2025

Adds fallible try_get_ methods to Buf. The methods align with the existing get_ methods. All of them, so this is a lot of lines but most of it is documentation. Note that I copied and adapted buf_get_impl to make try_buf_get_impl. It is possible to avoid some code duplication by calling buf_get_impl instead, but that will checked the remaining bytes twice, and buf_get_impl is performance optimized so I chose not to do that.

This code borrows some from the existing PR for this feature by @caelunshun, but that is old with lots of conflicts, so I chose to reimplement it from the current master instead.

I would rater have used from_be_bytes etc. for the floats as that seems more portable for NaN values, but it seems that the supported rust version is perhaps one minor version too old for that.

Closes #254

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hpenne added 2 commits January 9, 2025 18:22
…_get_impl macro is implemented through buf_try_get_impl to avoid code duplication, and copy_to_slice is implemented through try_copy_to_slice.
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hpenne commented Jan 12, 2025

@Darksonn @paolobarbolini I think I have made the necessary changes to the comments I have received so far. I have pushed the "Resove" button on each to indicate this (I hope this was the correct thing to do in this repo, it seems to vary). I hope you have the time next week to review my changes. Also, the CI needs to be started on the latest changes.

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Thanks, clicking resolve is fine. 👍

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…d::io::Error using From. Used TryGetError as the parameter for panic_advance, and moved TryGetError to before panic_advance in lib.rs. Removed unwrap_advance, as calling panic_advance is now convenient enough.
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Request: Provide try_get_* methods
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