public INode Power()
{
INode node = Unary();
while (true)
{
if (Accept("^"))
node = new BinaryNode(node, Unary(), '^');
else
break;
}
return node;
}
public INode SumSub()
{
INode node = MulDiv();
while (true)
{
if (Accept("+"))
node = new BinaryNode(node, MulDiv(), '+');
else if (Accept("-"))
node = new BinaryNode(node, MulDiv(), '-');
else
break;
}
return node;
}
public INode MulDiv()
{
INode node = Power();
while (true)
{
if (Accept("*"))
node = new BinaryNode(node, Power(), '*');
else if (Accept("/"))
node = new BinaryNode(node, Power(), '/');
else
break;
}
return node;
}
public INode Unary()
{
INode node = null;
if (Accept("+"))
node = Term();
else if (Accept("-"))
node = new BinaryNode(new ValueNode(0), Term(), '-');
else
node = Term();
return node;
}