private Func <double, double> ParseFunction(string str)
{
var tree = NumExprParser.ExpToTree(str);
var expr = NumExprToLinqExprTranslator.TranslateExprTree(tree);
return(expr.Compile());
}
public static Expression <Func <double, double> > TranslateExprTree(NumExpr tree)
{
var translator = new NumExprToLinqExprTranslator();
var body = tree.Apply(translator);
var lambda = Expression.Lambda <Func <double, double> >(body, translator.Arg);
return(lambda);
}
private void PerformIntegrationForCustomFunction()
{
string functionString = null;
if (
Dialogs.TryRequestValue("Input function : ", s => true, s => {
var tree = NumExprParser.ExpToTree(s);
var expr = NumExprToLinqExprTranslator.TranslateExprTree(tree);
functionString = tree.Apply(new NumExprStringCollector());
return(expr.Compile());
}, out var f))
{
this.PerformIntegrationForFunction(x => f(x));
}
else
{
Dialogs.PrintCancellation();
}
}
