static bool ShouldWrap(Expr expr, OperationPriority priority, ExpressionOrder order)
{
Func<OperationPriority, bool> shouldWrap = x => priority >= x;
return expr.MatchStrict(
add: x => shouldWrap(OperationPriority.Add),
mult: x => IsMinusExpression(x) || shouldWrap(OperationPriority.Multiply),
div: (x, y) => shouldWrap(OperationPriority.Divide),
power: (x, y) => true, //shouldWrap(OperationPriority.Power),
sqrt: x => false,
param: x => false,
@const: x => {
if(x.IsFraction())
return shouldWrap(OperationPriority.Power);
if(order == ExpressionOrder.Head)
return false;
return x < 0;
}
);
}