private bool IsOperatorableNode(BaseFormulaNode node)
{
return(node is NumberNode ||
node is VariableNode ||
node is WordNode ||
node is FunctionNode ||
node is WordListNode ||
node is NumberListNode);
}
private bool IsCloseBracket(BaseFormulaNode node)
{
return(node is BracketNode bracketNode && bracketNode.Bracket == Bracket.Close);
}
private bool IsOpenBracket(BaseFormulaNode node)
{
return(node is BracketNode bracketNode && bracketNode.Bracket == Bracket.Open);
}