private Node expr()
{
Node left = term();
while (currentToken.type == Token.ADD | currentToken.type == Token.SUB)
{
Node node = new BinOpNode(currentToken);
nextToken();
node.addChild(left);
node.addChild(term());
left = node;
}
return(left);
}
private Node term()
{
Node left = factor();
while (currentToken.type == Token.MUL | currentToken.type == Token.DIV | currentToken.type == Token.LT | currentToken.type == Token.AND | currentToken.type == Token.EQ)
{
Node node = new BinOpNode(currentToken);
nextToken();
node.addChild(left);
node.addChild(factor());
left = node;
}
return(left);
}