public static Expression GetCastExpression(Expression castexp, Expression argexp)
{
// take the value out of the var, if we've got a var
if (argexp.Type == typeof(InputVar))
{
argexp = Expression.Field(argexp, "Value");
}
string castname = (castexp as ConstantExpression).Value as string;
switch (castname.ToLower())
{
case "c:o":
return(Expression.Convert(argexp, typeof(object)));
case "c:b":
if (argexp.Type == typeof(string))
{
return(ExStrings.GetParseBoolExpression(argexp));
}
return(Expression.Convert(argexp, typeof(bool)));
case "c:b2":
return(Expression.Convert(argexp, typeof(bool[])));
case "c:d":
if (argexp.Type == typeof(string))
{
return(ExStrings.GetParseDoubleExpression(argexp));
}
return(Expression.Convert(argexp, typeof(double)));
case "c:d2":
return(Expression.Convert(argexp, typeof(double[])));
case "c:i":
if (argexp.Type == typeof(string))
{
return(ExStrings.GetParseIntExpression(argexp));
}
return(Expression.Convert(argexp, typeof(int)));
case "c:i2":
return(Expression.Convert(argexp, typeof(int[])));
case "c:s":
return(Expression.Call(typeof(ExCasts).GetTypeInfo().GetDeclaredMethod("ConvertToString"),
Expression.Convert(argexp, typeof(object))));
//return Expression.Convert(argexp, typeof(string));
case "c:s2":
return(Expression.Convert(argexp, typeof(string[])));
default:
// we didn't recognize the cast
throw new Exception("Unrecognized cast '" + castname + "'");
}
}
public static InputVar AddAssignAtRuntime(InputContext context, object o, object v)
{
InputVar var = GetVarAtRuntime(context, o, "add-assign");
if (var.Value is string)
{
var.Value = ExStrings.Concat(var.Value, v);
return(var);
}
else if (var.Value is double)
{
if (v is double)
{
var.Value = ((double)var.Value) + ((double)v);
}
else if (v is int)
{
var.Value = ((double)var.Value) + ((double)((int)v));
}
else
{
throw new Exception("Tried to add-assign unsupported type '" + v.GetType() + "' to double var '" + var.Name + "'.");
}
return(var);
}
else if (var.Value is int)
{
if (v is double)
{
var.Value = ((int)var.Value) + ((int)((double)v));
}
else if (v is int)
{
var.Value = ((int)var.Value) + ((int)v);
}
else
{
throw new Exception("Tried to add-assign unsupported type '" + v.GetType() + "' to int var '" + var.Name + "'.");
}
return(var);
}
throw new Exception("Tried to add-assign unsupported type '" + var.Value.GetType() + "'.");
}
