chore: String impl - copy_into_slice
#162
Merged
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The current
SchemaReadimpl forStringcallsfill_bufwith the total length of the string.Future
Readerimplementations on IO sources like #54 can provide implementations ofcopy_into_slicethat can circumvent actual buffer fills by copying bytes directly into destinations when reads would exceed the capacity of the backing buffer. UpdatingStringto usecopy_into_slicewill allow it to use these specializations in the future.