Operator

-(_:_:)

Returns the result of subtracting one demand from another.

Declaration

static func - (lhs: Subscribers.Demand, rhs: Subscribers.Demand) -> Subscribers.Demand

Discussion

When subtracting any value (including unlimited) from unlimited, the result is still unlimited. Subtracting unlimited from any value (except unlimited) results in .max(0).

A negative demand is possible, but be aware that it is not usable when requesting values in a subscription.

See Also

Performing Mathematical Operations

static func * (Subscribers.Demand, Int) -> Subscribers.Demand

Returns the result of multiplying a demand by an integer.

static func *= (inout Subscribers.Demand, Int)

Multiplies a demand by an integer, and assigns the result to the demand.

static func + (Subscribers.Demand, Int) -> Subscribers.Demand

Returns the result of adding an integer to a demand.

static func += (inout Subscribers.Demand, Subscribers.Demand)

Adds two demands, and assigns the result to the first demand.

static func += (inout Subscribers.Demand, Int)

Adds an integer to a demand, and assigns the result to the demand.

static func - (Subscribers.Demand, Int) -> Subscribers.Demand

Returns the result of subtracting an integer from a demand.

static func -= (inout Subscribers.Demand, Subscribers.Demand)

Subtracts one demand from another, and assigns the result to the first demand.

static func -= (inout Subscribers.Demand, Int)

Subtracts an integer from a demand, and assigns the result to the demand.

static func ... (Subscribers.Demand) -> PartialRangeFrom<Subscribers.Demand>

Returns a partial range extending upward from a lower bound.

static func ... (Subscribers.Demand) -> PartialRangeThrough<Subscribers.Demand>

Returns a partial range up to, and including, its upper bound.