public override object GetValue(ExecutionContext ctx)
{
object lStart = _left.GetValue(ctx);
object rStart = _right.GetValue(ctx);
object lFinal;
object rFinal;
TypeChecker.GreatestCommonType gct = TypeChecker.GCT(lStart, rStart);
switch (gct)
{
case TypeChecker.GreatestCommonType.StringType:
lFinal = Convert.ToString(lStart);
rFinal = Convert.ToString(rStart);
break;
case TypeChecker.GreatestCommonType.BooleanType:
lFinal = Convert.ToBoolean(lStart);
rFinal = Convert.ToBoolean(rStart);
break;
case TypeChecker.GreatestCommonType.NumericType:
lFinal = Convert.ToDecimal(lStart);
rFinal = Convert.ToDecimal(rStart);
break;
default:
throw new ArgumentOutOfRangeException();
}
// execute on the converted values
return _op.Evaluate(lFinal, rFinal);
}
public object Exec(string input, ExecutionContext ctx)
{
var processor = new SemanticProcessor<GCToken>(new StringReader(input), actions);
ParseMessage parseMessage = processor.ParseAll();
if (parseMessage == ParseMessage.Accept)
{
var statement = processor.CurrentToken as Expression;
if (statement != null)
{
try
{
return statement.GetValue(ctx);
}
catch (FormulaSolverException ex)
{
return "??" + ex.Message;
}
}
}
else
{
IToken token = processor.CurrentToken;
return String.Format("??Syntax error at: {0} [{1}]", token.Position.Index, parseMessage);
}
return null;
}
private void InsertMissingVariableLines(string input, ExecutionContext ctx)
{
StringBuilder sb = new StringBuilder();
foreach (string name in ctx.GetMissingVariableNames())
{
sb.AppendLine(name + "=");
}
sb.Append(input);
input = sb.ToString();
}
public override object GetValue(ExecutionContext ctx)
{
string res = "";
if (element != null)
{
res += Convert.ToString(element.GetValue(ctx));
}
if (concatenation != null)
{
res += Convert.ToString(concatenation.GetValue(ctx));
}
return res;
}
public override object GetValue(ExecutionContext ctx)
{
string res = "";
if (text != null)
{
res += text.GetValue(ctx);
}
if (expressionList != null)
{
foreach (Expression ex in expressionList)
{
res += ex.GetValue(ctx);
}
}
return res;
}
public override object GetValue(ExecutionContext ctx)
{
string functionName = function.GetValue(ctx).ToString();
Functor f = ctx.GetFunction(functionName);
ArrayList arguments = new ArrayList();
if (!emptyArgsList)
{
if (args.GetType() == typeof(Sequence<Expression>))
{
Sequence<Expression> seq = (Sequence<Expression>)args;
foreach (Expression ex in (Sequence<Expression>)args)
{
arguments.Add(ex.GetValue(ctx));
}
}
else
{
arguments.Add(((Expression)args).GetValue(ctx));
}
}
return f.Execute(arguments.ToArray(), ctx);
}
public override object GetValue(ExecutionContext ctx)
{
return _value;
}
public override object GetValue(ExecutionContext ctx)
{
return ctx[_idName];
}
public override object GetValue(ExecutionContext ctx)
{
ctx[_receiver._idName] = (_expr != null) ? _expr.GetValue(ctx) : "";
return string.Format("{0}={1}", _receiver._idName, ctx[_receiver._idName]);
}
public override object GetValue(ExecutionContext ctx)
{
return -(Convert.ToDecimal(computable.GetValue(ctx)));
}
public abstract object GetValue(ExecutionContext ctx);
public override object GetValue(ExecutionContext ctx)
{
return functionName;
}
