Customizable buffer type (proof of concept) #2912
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| This would be WONDERFUL, thank you @dtolnay for exploring it <3 |
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| I hope, that before landing this, you will look at least an one implementation for a format other than JSON-like. I can help with testing this approach in quick-xml. |
| I'm a maintainer for RON and we'd also be very interested |
| @dtolnay We just had another bug report in RON that we cannot fix because of not being able to customize the content/buffer type. Since precise capturing in traits was released in 1.87, would you be able to take another look at this PR? |
This was referenced Sep 15, 2025
| Any progress here? |
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This demonstrates a backward compatible way that a format such as serde_json could use its own serde_json::Value as its buffer type for untagged enums and flatten, instead of "Content", solving #1183. Uses "return position impl trait in traits" (stabilized in Rust 1.75 by rust-lang/rust#115822) and "precise capturing in traits" (stabilized in Rust 1.87 by rust-lang/rust#138128).