protected virtual object EvalStart(ParseTree tree, params object[] paramlist)
{
return("Could not interpret input; no semantics implemented.");
}
/// <summary>
/// this implements the evaluation functionality, cannot be used directly
/// </summary>
/// <param name="tree">the parsetree itself</param>
/// <param name="paramlist">optional input parameters</param>
/// <returns>a partial result of the evaluation</returns>
internal object Eval(ParseTree tree, params object[] paramlist)
{
object Value = null;
switch (Token.Type)
{
case TokenType.Start:
Value = EvalStart(tree, paramlist);
break;
case TokenType.Gramatica:
Value = EvalGramatica(tree, paramlist);
break;
case TokenType.Sets:
Value = EvalSets(tree, paramlist);
break;
case TokenType.CuerpoSets:
Value = EvalCuerpoSets(tree, paramlist);
break;
case TokenType.ListaSets:
Value = EvalListaSets(tree, paramlist);
break;
case TokenType.SetDef:
Value = EvalSetDef(tree, paramlist);
break;
case TokenType.Def:
Value = EvalDef(tree, paramlist);
break;
case TokenType.Tokens:
Value = EvalTokens(tree, paramlist);
break;
case TokenType.DeclaracionTokens:
Value = EvalDeclaracionTokens(tree, paramlist);
break;
case TokenType.CuerpoTokens:
Value = EvalCuerpoTokens(tree, paramlist);
break;
case TokenType.ListaTokens:
Value = EvalListaTokens(tree, paramlist);
break;
case TokenType.ListaDefToken:
Value = EvalListaDefToken(tree, paramlist);
break;
case TokenType.DefToken:
Value = EvalDefToken(tree, paramlist);
break;
case TokenType.SimpleToken:
Value = EvalSimpleToken(tree, paramlist);
break;
case TokenType.AgrupaToken:
Value = EvalAgrupaToken(tree, paramlist);
break;
case TokenType.Acciones:
Value = EvalAcciones(tree, paramlist);
break;
case TokenType.DeclaracionAcciones:
Value = EvalDeclaracionAcciones(tree, paramlist);
break;
case TokenType.CuerpoAcciones:
Value = EvalCuerpoAcciones(tree, paramlist);
break;
case TokenType.FuncionReservadas:
Value = EvalFuncionReservadas(tree, paramlist);
break;
case TokenType.CuerpoFunciones:
Value = EvalCuerpoFunciones(tree, paramlist);
break;
case TokenType.ListaAcciones:
Value = EvalListaAcciones(tree, paramlist);
break;
case TokenType.ListaFunciones:
Value = EvalListaFunciones(tree, paramlist);
break;
case TokenType.OtrasFunciones:
Value = EvalOtrasFunciones(tree, paramlist);
break;
case TokenType.Errores:
Value = EvalErrores(tree, paramlist);
break;
case TokenType.ListaErrores:
Value = EvalListaErrores(tree, paramlist);
break;
default:
Value = Token.Text;
break;
}
return(Value);
}
public ParseTree Parse(string input)
{
tree = new ParseTree();
return(Parse(input, tree));
}
protected object GetValue(ParseTree tree, TokenType type, int index)
{
return(GetValue(tree, type, ref index));
}
public ParseTree Parse(string input, string fileName)
{
tree = new ParseTree();
return(Parse(input, fileName, tree));
}