2016-12-21 16:55:00 +00:00
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// Copyright 2016 Mozilla
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
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// this file except in compliance with the License. You may obtain a copy of the
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// License at http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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extern crate edn;
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2017-01-11 21:51:34 +00:00
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use edn::symbols::Keyword;
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2016-12-21 16:55:00 +00:00
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pub type EntId = u32; // TODO: u64? Not all DB values will be representable in a u32.
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/// The ability to transform entity identifiers (entids) into keyword names (idents).
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pub trait ToIdent {
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fn ident(&self, entid: EntId) -> Option<Keyword>;
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}
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/// The ability to transform idents into the corresponding entid.
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pub trait ToEntId {
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fn entid(&self, ident: &Keyword) -> Option<EntId>;
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}
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