Hashbrown 0.15.0

[takaomag]

Yesterday, hashbrown 0.15.0 is released.

Currently, serde_with has hashbrown_0_14 feature which supports only 0.14.
New hashbrown_0_15 feature or hashbrown feature for both versions should be added?

[jonasbb]

Hi and thanks for the information. The correct way to go about it is to add a new optional dependency and feature. Both named hashbrown_0_15. It can be mostly a copy of the existing code.

serde_with/serde_with/Cargo.toml

Lines 70 to 75 in f1b79f2

	## The feature enables `hashbrown::{HashMap, HashSet}` as supported containers.
	##
	## This pulls in `hashbrown` v0.14 as a dependency.
	## It enables the `alloc` feature.
	## Some functionality is only available when `std` is enabled too.
	hashbrown_0_14 = ["dep:hashbrown_0_14", "alloc"]

The next steps are to copy the implementations that exist for hashbrown_0_14 and copy them over too. The implementations for map and set types is spread throughout the code base, but can usually be found by looking at the type names or imports.

serde_with/serde_with/src/de/impls.rs

Lines 3 to 4 in f1b79f2

	#[cfg(feature = "hashbrown_0_14")]
	use hashbrown_0_14::{HashMap as HashbrownMap014, HashSet as HashbrownSet014};

[takaomag]

Thanks!