memory-db: allow changing the default hasher #224
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Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>
skunert
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Jul 8, 2025
bkchr
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Jul 8, 2025
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@alexggh you should directly bump the crate version. |
bkchr
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Jul 8, 2025
memory-db/src/lib.rs
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| impl<H, KF, T, S> Default for MemoryDB<H, KF, T, S> | ||
| where | ||
| H: KeyHasher, | ||
| T: for<'a> From<&'a [u8]>, | ||
| KF: KeyFunction<H>, | ||
| S: BuildHasher + Default, |
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| impl<H, KF, T, S> Default for MemoryDB<H, KF, T, S> | |
| where | |
| H: KeyHasher, | |
| T: for<'a> From<&'a [u8]>, | |
| KF: KeyFunction<H>, | |
| S: BuildHasher + Default, | |
| impl<H, KF, T> Default for MemoryDB<H, KF, T, RandomState> | |
| where | |
| H: KeyHasher, | |
| T: for<'a> From<&'a [u8]>, | |
| KF: KeyFunction<H>, |
This way you can just use default() without declaring the random state. Similar to HashMap we should then provide a function with_random_state
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Done, specialising the default meant that I had to plumb a few places where default() did not work anymore when using it with the custom RandomState.
But, I like that more since it is similar with how hashmap is used.
lexnv
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Jul 8, 2025
Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>
Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>
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Done. |
Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>
alexggh
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Signed-off-by: Alexandru Gheorghe <alexandru.gheorghe@parity.io>
alexggh
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To be used by paritytech/polkadot-sdk#9127, to replace the default hasher with a custom one.