public override CodeGenPayload Visit(FactorialToken token, CodeGenPayload state = default)
{
var factorialPExpr = Expression.Parameter(typeof(double));
var factorialExpr = Expression.Lambda(Expression.Invoke(Expression.Constant((Func <double, double>)Factorial), factorialPExpr), factorialPExpr);
return(state?.Combine(new CodeGenPayload {
Expression = Expression.Invoke(factorialExpr, Visit(token, state).Expression)
}));
}
protected T Visit(IToken token, T state = default)
{
return(token switch
{
AddToken addToken => Visit(addToken, state),
SubtractToken subtractToken => Visit(subtractToken, state),
MultiplyToken multiplyToken => Visit(multiplyToken, state),
DivideToken divideToken => Visit(divideToken, state),
NegateToken negateToken => Visit(negateToken, state),
NumberToken numberToken => Visit(numberToken, state),
FactorialToken factorialToken => Visit(factorialToken, state),
PowerToken powerToken => Visit(powerToken, state),
VariableToken variableToken => Visit(variableToken, state),
AssignmentToken assignmentToken => Visit(assignmentToken, state),
_ => throw new ArgumentOutOfRangeException(nameof(token))
});
public virtual T Visit(FactorialToken token, T state = default)
{
return(Visit(token.Item1, state ?? new T()));
}