static internal Expr Create(Stack <Expr> stack, string op)
{
Expr right = NestedExpr.NestedIfNeeded(stack.Pop(), op);
Expr left = NestedExpr.NestedIfNeeded(stack.Pop(), op);
return(new BinExpr(left, right, op));
}
static internal Expr Create(Stack <Expr> stack, string op)
{
Expr expr = NestedExpr.NestedIfNeeded(stack.Pop(), op);
return(new UnaryExpr(expr, op));
}
