ConstraintBuilding.swift

public protocol ConstraintBuilding {
    var anchorable: Anchorable { get }
    func build(
        _ anchor: Anchor,
        constant: CGFloat,
        multiplier: CGFloat
    ) -> ConstraintBuilder
}

extension ConstraintBuilding {
    public func leading(_ constant: CGFloat = 0, multiplier: CGFloat = 1) -> ConstraintBuilder {
        build(anchorable.anchor(.leading), constant: constant, multiplier: multiplier)
    }
    public func trailing(_ constant: CGFloat = 0, multiplier: CGFloat = 1) -> ConstraintBuilder {
        build(anchorable.anchor(.trailing), constant: constant, multiplier: multiplier)
    }
    public func top(_ constant: CGFloat = 0, multiplier: CGFloat = 1) -> ConstraintBuilder {
        build(anchorable.anchor(.top), constant: constant, multiplier: multiplier)
    }
    public func bottom(_ constant: CGFloat = 0, multiplier: CGFloat = 1) -> ConstraintBuilder {
        build(anchorable.anchor(.bottom), constant: constant, multiplier: multiplier)
    }
}