public PrintMachineState GetNext(Token token)
{
PrintMachineState nextState = this.CurrentState;
PrintStateTransition transition = new PrintStateTransition(CurrentState, token.Type);
if (!transitions.TryGetValue(transition, out nextState))
{
throw new Exception("PRINT: Invalid transition: " + CurrentState + " -> " + nextState + "\n" + token.Text + " " + token.Type);
}
if (this.CurrentState == PrintMachineState.PRINT && token.Type != TokenType.END)
{
this.command.ConsumeToken(token);
}
Console.WriteLine("PRINT: " + this.CurrentState + " -> " + nextState + ": " + token.Text);
return(nextState);
}
public PrintStateMachine(VariableTable variables, FileManager fileManager)
{
CurrentState = PrintMachineState.START;
transitions = new Dictionary <PrintStateTransition, PrintMachineState>
{
{ new PrintStateTransition(PrintMachineState.START, TokenType.END), PrintMachineState.START },
{ new PrintStateTransition(PrintMachineState.START, TokenType.PRINT), PrintMachineState.PRINT },
{ new PrintStateTransition(PrintMachineState.PRINT, TokenType.STRING), PrintMachineState.PRINT_MULTIPLE },
{ new PrintStateTransition(PrintMachineState.PRINT, TokenType.QUOTED_STRING), PrintMachineState.PRINT_MULTIPLE },
{ new PrintStateTransition(PrintMachineState.PRINT, TokenType.VAR), PrintMachineState.PRINT_MULTIPLE },
{ new PrintStateTransition(PrintMachineState.PRINT, TokenType.INT), PrintMachineState.PRINT_MULTIPLE },
{ new PrintStateTransition(PrintMachineState.PRINT, TokenType.ARRAY), PrintMachineState.PRINT_MULTIPLE },
{ new PrintStateTransition(PrintMachineState.PRINT, TokenType.END), PrintMachineState.START },
{ new PrintStateTransition(PrintMachineState.PRINT_MULTIPLE, TokenType.COMMA), PrintMachineState.PRINT },
{ new PrintStateTransition(PrintMachineState.PRINT_MULTIPLE, TokenType.END), PrintMachineState.START },
};
this.variables = variables;
this.command = new PrintCommand(fileManager);
}
public PrintStateTransition(PrintMachineState currentState, TokenType token)
{
this.CurrentState = currentState;
this.Token = token;
}
public void MoveToNextState(Token token)
{
PrintMachineState nextState = GetNext(token);
this.CurrentState = nextState;
}
