private TreeNode MakeUnaryDifferential(UnaryOperationTreeNode uTreeNode, int index)
{
TreeNode childDx = MakeDifferential(uTreeNode.Child, index);
TreeNode differential = UnaryDifferential[uTreeNode.Operation].Clone();
ReplaceDifferentialArguments(differential, uTreeNode.Child, childDx);
return(differential);
}
// stupid factorial. Why should it be after term, not before it?
TreeNode ParseTermWithPossibleFactorial(ConstructionContext context)
{
TreeNode term = ParseTerm(context);
while (context.TryPeekNextToken(out Token factorialToken) &&
factorialToken is SymbolToken factorialSymbolToken &&
factorialSymbolToken.Symbol == '!')
{
context.EatLastToken(); // eat factorial token
term = new UnaryOperationTreeNode(UnaryOperation.Factorial, term);
}
return(term);
}
