public int Visit(DivideOpNode caller)
{
int left = caller.LeftSon.Accept(this);
int right = caller.RightSon.Accept(this);
return(left / right);
}
public double Visit(DivideOpNode caller)
{
double left = caller.LeftSon.Accept(this);
double right = caller.RightSon.Accept(this);
return(left / right);
}
private Node Term()
{
// factor ((MUL^|DIV^|MOD^) factor)*
Node factorExpression = Factor();
while (LookAhead(1) == TokenType.MULTIPLY ||
LookAhead(1) == TokenType.DIVIDE ||
LookAhead(1) == TokenType.MOD)
{
if (LookAhead(1) == TokenType.MULTIPLY)
{
factorExpression = new MultiplyOpNode(
Match(TokenType.MULTIPLY).Position,
factorExpression, Factor());
}
else if (LookAhead(1) == TokenType.DIVIDE)
{
factorExpression = new DivideOpNode(
Match(TokenType.DIVIDE).Position,
factorExpression, Factor());
}
else if (LookAhead(1) == TokenType.MOD)
{
factorExpression = new ModOpNode(
Match(TokenType.MOD).Position,
factorExpression, Factor());
}
}
return(factorExpression);
}
