public override void Visit(RelationalBinOpExpression node)
{
string op = "";
if (node.Op == RelationalBinOp.Equal)
{
op = "=";
}
else if (node.Op == RelationalBinOp.GreaterThan)
{
op = ">";
}
else if (node.Op == RelationalBinOp.GreaterThanOrEqual)
{
op = ">=";
}
else if (node.Op == RelationalBinOp.LessThan)
{
op = "<";
}
else if (node.Op == RelationalBinOp.LessThanOrEqual)
{
op = "<=";
}
else if (node.Op == RelationalBinOp.NotEqual)
{
op = "!=";
}
List <string> children = PopChildren();
Return(SurroundWithParens(children[0] + op + children[1], node.ParenCount));
}
void RelationalTerm(out Expression exp)
{
Expression right = null, left = null; RelationalBinOp op = RelationalBinOp.Equal;
ArithmeticExpression(out left);
exp = left;
if (StartOf(3))
{
switch (la.kind)
{
case 30: {
Get();
op = RelationalBinOp.Equal;
break;
}
case 31: {
Get();
op = RelationalBinOp.NotEqual;
break;
}
case 32: {
Get();
op = RelationalBinOp.GreaterThan;
break;
}
case 33: {
Get();
op = RelationalBinOp.GreaterThanOrEqual;
break;
}
case 34: {
Get();
op = RelationalBinOp.LessThan;
break;
}
case 35: {
Get();
op = RelationalBinOp.LessThanOrEqual;
break;
}
}
ArithmeticExpression(out right);
exp = new RelationalBinOpExpression(exp, right, op); CopyPos(exp, ((RelationalBinOpExpression)exp).Left, t);
}
}
public override void Visit(RelationalBinOpExpression exp)
{
if (exp.Left is Number && exp.Right is Number)
{
bool result = false;
int leftVal, rightVal;
leftVal = ((Number)exp.Left).Value;
rightVal = ((Number)exp.Right).Value;
if (exp.Op == RelationalBinOp.Equal)
{
result = rightVal == leftVal;
}
else if (exp.Op == RelationalBinOp.GreaterThan)
{
result = leftVal > rightVal;
}
else if (exp.Op == RelationalBinOp.GreaterThanOrEqual)
{
result = leftVal >= rightVal;
}
else if (exp.Op == RelationalBinOp.LessThan)
{
result = leftVal < rightVal;
}
else if (exp.Op == RelationalBinOp.LessThanOrEqual)
{
result = leftVal <= rightVal;
}
else if (exp.Op == RelationalBinOp.NotEqual)
{
result = leftVal != rightVal;
}
exp.Parent.Replace(exp, new Bool(result));
}
}
public virtual void Visit(RelationalBinOpExpression node)
{
}