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- // Copyright (c) 2021 Couchbase, Inc.
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
-
- package segment
-
- // Automaton represents the general contract of a byte-based finite automaton
- type Automaton interface {
-
- // Start returns the start state
- Start() int
-
- // IsMatch returns true if and only if the state is a match
- IsMatch(int) bool
-
- // CanMatch returns true if and only if it is possible to reach a match
- // in zero or more steps
- CanMatch(int) bool
-
- // WillAlwaysMatch returns true if and only if the current state matches
- // and will always match no matter what steps are taken
- WillAlwaysMatch(int) bool
-
- // Accept returns the next state given the input to the specified state
- Accept(int, byte) int
- }
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