void PlusMinusTerm(out Expression aexp)
{
ArithmeticBinOp op; Expression right = null, left = null;
UnaryMinusTerm(out left);
aexp = left;
while (la.kind == 10 || la.kind == 22 || la.kind == 23) {
if (la.kind == 10) {
Get();
op = ArithmeticBinOp.Multiply;
} else if (la.kind == 22) {
Get();
op = ArithmeticBinOp.Divide;
} else {
Get();
op = ArithmeticBinOp.Modulo;
}
UnaryMinusTerm(out right);
aexp = new ArithmeticBinOpExpression(aexp, right, op); CopyPos(((ArithmeticBinOpExpression)aexp).Left,aexp,t);
}
}
void Expression(out Expression aexp)
{
ArithmeticBinOp op; Expression right = null, left = null;
PlusMinusTerm(out left);
aexp = left;
while (la.kind == 11 || la.kind == 21) {
if (la.kind == 11) {
Get();
op = ArithmeticBinOp.Plus;
} else {
Get();
op = ArithmeticBinOp.Minus;
}
PlusMinusTerm(out right);
aexp = new ArithmeticBinOpExpression(aexp, right, op); CopyPos(((ArithmeticBinOpExpression)aexp).Left,aexp,t);
}
}
public override void Visit(ArithmeticBinOpExpression exp)
{
if (exp.Left is Number && exp.Right is Number) {
int result = 0, leftVal, rightVal;
leftVal = ((Number)exp.Left).Value;
rightVal = ((Number)exp.Right).Value;
if (exp.Op == ArithmeticBinOp.Plus) {
result = rightVal + leftVal;
} else if (exp.Op == ArithmeticBinOp.Minus) {
result = leftVal - rightVal;
} else if (exp.Op == ArithmeticBinOp.Multiply) {
result = leftVal * rightVal;
} else if (exp.Op == ArithmeticBinOp.Divide) {
result = leftVal / rightVal;
}
exp.Parent.Replace(exp, new Number(result));
}
}
//Expressions
public virtual void Visit(ArithmeticBinOpExpression node)
{
}
//Expressions
public override void Visit(ArithmeticBinOpExpression node)
{
string op = "";
if (node.Op == ArithmeticBinOp.Divide) {
op = "/";
} else if (node.Op == ArithmeticBinOp.Minus) {
op = "-";
} else if (node.Op == ArithmeticBinOp.Plus) {
op = "+";
} else if (node.Op == ArithmeticBinOp.Modulo) {
op = "%";
} else if (node.Op == ArithmeticBinOp.Multiply) {
op = "*";
}
List<string> children = PopChildren();
Return(SurroundWithParens(children[0] + op + children[1], node.ParenCount));
}
public virtual string Format(ArithmeticBinOpExpression exp)
{
char op = 'E';
if (exp.Op == ArithmeticBinOp.Divide) {
op = '/';
} else if (exp.Op == ArithmeticBinOp.Minus) {
op = '-';
} else if (exp.Op == ArithmeticBinOp.Modulo) {
op = '%';
} else if (exp.Op == ArithmeticBinOp.Multiply) {
op = '*';
} else if (exp.Op == ArithmeticBinOp.Plus) {
op = '+';
}
return SurroundWithParens(Format(exp.Left) + op + Format(exp.Right), exp.ParenCount);
}
