public Lexeme GetNextLexemeFromBuffer(LexemeType specifiedLexeme = LexemeType.Unspecified)
{
if (_bufferReader.EndOfStream)
{
return(EofLexeme);
}
var lexeme = new List <char>();
var currentState = _stateContainer[specifiedLexeme.ToString()];
if (currentState is TerminalState)
{
_bufferReader.AdvanceBuffer();
}
while (!(currentState is TerminalState))
{
currentState = currentState.TransitionToNextState(_bufferReader.Buffer, lexeme);
}
var terminalStateLexeme = new Lexeme(((TerminalState)currentState).Type, new string(lexeme.ToArray()));
return(terminalStateLexeme);
}
public DfaLexemeReader(IStateContainer stateContainer, IBufferReader bufferReader)
{
_stateContainer = stateContainer ?? throw new ArgumentNullException(nameof(bufferReader));
_bufferReader = bufferReader ?? throw new ArgumentNullException(nameof(bufferReader));
_bufferReader.AdvanceBuffer(); //Preload the buffer
}
