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-rw-r--r--internal/cache/error.go27
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diff --git a/internal/cache/error.go b/internal/cache/error.go
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+++ b/internal/cache/error.go
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+/*
+ GoToSocial
+ Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU Affero General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU Affero General Public License for more details.
+
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package cache
+
+import "errors"
+
+// Error models an error returned by the in-memory cache.
+type Error error
+
+// ErrNotFound means that a value for the requested key was not found in the cache.
+var ErrNotFound = errors.New("value not found in cache")