2021-02-28 23:08:33 +00:00
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// Copyright (c) 2021 Couchbase, Inc.
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2018-05-19 12:49:46 +00:00
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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2021-02-28 23:08:33 +00:00
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package segment
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2018-05-19 12:49:46 +00:00
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// Automaton represents the general contract of a byte-based finite automaton
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type Automaton interface {
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// Start returns the start state
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Start() int
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// IsMatch returns true if and only if the state is a match
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IsMatch(int) bool
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// CanMatch returns true if and only if it is possible to reach a match
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// in zero or more steps
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CanMatch(int) bool
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// WillAlwaysMatch returns true if and only if the current state matches
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// and will always match no matter what steps are taken
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WillAlwaysMatch(int) bool
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// Accept returns the next state given the input to the specified state
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Accept(int, byte) int
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}
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