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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace Implab.Parsing {
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/// <summary>
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/// Полностью описывает DFA автомат, его поведение, состояние и входные символы.
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/// </summary>
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/// <example>
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/// class MyAutomaton {
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/// int m_current;
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/// readonly DFAStateDescriptor<string>[] m_automaton;
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/// readonly IAlphabet<MyCommands> m_commands;
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///
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/// public MyAutomaton(IDFADefinition<MyCommands,MyStates,string> definition) {
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/// m_current = definition.StateAlphabet.Translate(MyStates.Initial);
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/// m_automaton = definition.GetTransitionTable();
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/// m_commands = definition.InputAlphabet;
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/// }
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///
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/// // defined a method which will move the automaton to the next state
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/// public void Move(MyCommands cmd) {
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/// // use transition map to determine the next state
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/// var next = m_automaton[m_current].transitions[m_commands.Translate(cmd)];
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///
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/// // validate that we aren't in the unreachable state
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/// if (next == DFAConst.UNREACHABLE_STATE)
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/// throw new InvalidOperationException("The specified command is invalid");
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///
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/// // if everything is ok
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/// m_current = next;
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/// }
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/// }
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/// </example>
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public interface IDFADefinition<TInput, TState, TTag> {
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/// <summary>
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/// Алфавит входных символов
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/// </summary>
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/// <value>The input alphabet.</value>
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IAlphabet<TInput> InputAlphabet {
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get;
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}
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/// <summary>
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/// Алфавит состояний автомата
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/// </summary>
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/// <value>The state alphabet.</value>
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IAlphabet<TState> StateAlphabet {
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get;
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}
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/// <summary>
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/// Таблица переходов состояний автомата
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/// </summary>
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/// <returns>The transition table.</returns>
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DFAStateDescriptior<TTag>[] GetTransitionTable();
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}
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}
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