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Introduce WeakBoundedVec, StorageTryAppend, and improve BoundedVec API #8842
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bkchr
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May 17, 2021
kianenigma
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May 18, 2021
ah yes, I changed it too now. |
gui1117
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after discussion I will implement WeakBoundedVec and make BoundedVec API complete by changing Decode/Encode |
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gui1117
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May 20, 2021
| /// Marker trait that will be implemented for types that support the `storage::try_append` api. | ||
| /// | ||
| /// This trait is sealed. | ||
| pub trait StorageTryAppend<Item>: StorageDecodeLength + private::Sealed { |
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this is a new trait in order to be able to implement try_append for both WeakBoudedVec and BoundedVec without too much code duplication.
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shawntabrizi
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May 20, 2021
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thank you! |
coriolinus
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May 21, 2021
Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>
coriolinus
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bot merge |
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Trying merge. |
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Aug 8, 2021
paritytech#8842) * fix bounded vec doc and unsafe * fix btree map and set and tests * introduce weak_bounded_vec and StorageTryAppend * fix tests and reorganize tests * improve doc * add doc * Update frame/support/src/storage/weak_bounded_vec.rs Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com> * fix inner doc Co-authored-by: Peter Goodspeed-Niklaus <coriolinus@users.noreply.github.com>
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Fix #8839
This PR does:
WeakBoundedVec: it is exactly same as BoundedVec previous to this PR, i.e. the lenght is not enforced byforce_fromnordecode, but it warns when exceeded.BoundedVecAPI:force_fromis removed anddecodeonly accept vec with correct size.StorageTryAppend: allow to specify that a storage value have a maximum bound. It is used to implement try_append on storage value, storage map and storage double map now.Previous to this PR, try_append was only implemented for
BoundedVecexplicitly. TheStorageTryAppendallow to implementtry_appendon various types, such asBoundedVecandWeakBoundedVec.