37 lines
1.2 KiB
Go
37 lines
1.2 KiB
Go
// 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
|
|
}
|