48 lines
1.7 KiB
Nim
48 lines
1.7 KiB
Nim
# Nimbus - Types, data structures and shared utilities used in network sync
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#
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# Copyright (c) 2018-2021 Status Research & Development GmbH
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# Licensed under either of
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# * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or
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# http://www.apache.org/licenses/LICENSE-2.0)
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# * MIT license ([LICENSE-MIT](LICENSE-MIT) or
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# http://opensource.org/licenses/MIT)
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# at your option. This file may not be copied, modified, or
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# distributed except according to those terms.
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## Iterators for non-persistent backend of the Aristo DB
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## =====================================================
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##
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import
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../aristo_init/[aristo_memory, memory_only],
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".."/[aristo_desc, aristo_init],
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./aristo_walk_private
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export
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aristo_memory,
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memory_only
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# ------------------------------------------------------------------------------
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# Public iterators (all in one)
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# ------------------------------------------------------------------------------
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iterator walkVtxBe*[T: MemBackendRef|VoidBackendRef](
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_: type T;
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db: AristoDbRef;
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): tuple[n: int, vid: VertexID, vtx: VertexRef] =
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## Iterate over filtered memory backend or backend-less vertices. This
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## function depends on the particular backend type name which must match
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## the backend descriptor.
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for (n,vid,vtx) in db.to(T).walkVtxBeImpl db:
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yield (n,vid,vtx)
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iterator walkKeyBe*[T: MemBackendRef|VoidBackendRef](
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_: type T;
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db: AristoDbRef;
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): tuple[n: int, vid: VertexID, key: HashKey] =
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## Similar to `walkVtxBe()` but for keys.
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for (n,vid,key) in db.to(T).walkKeyBeImpl db:
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yield (n,vid,key)
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# ------------------------------------------------------------------------------
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# End
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# ------------------------------------------------------------------------------
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