Making Cartography compile faster.

CartographyExtensions.swift

//
//  CartographyExtensions.swift
//  portkey
//
//  Created by Samuel Beek on 14/06/16.
//
// Note: still WIP. I only dealt with the equality operator (==), haven't worked on <= and ~ yet. 
// But adding this won't be bad for you project, it saves me 70% compile time per block on avarage. 

import Foundation

public func makeEqual<P: RelativeEquality>(lhs: P, _ rhs: Expression<P>) -> NSLayoutConstraint {
    return lhs.context.addConstraint(lhs, coefficients: rhs.coefficients[0], to: rhs.value)
}

public func makeEqual<P: RelativeEquality>(lhs: P, _ rhs: P) -> NSLayoutConstraint {
    return lhs.context.addConstraint(lhs, to: rhs)
}

public func makeEqual(lhs: NumericalEquality, _ rhs: CGFloat) -> NSLayoutConstraint {
    return lhs.context.addConstraint(lhs, coefficients: Coefficients(1, rhs))
}

public func makeEqual<P: RelativeCompoundEquality>(lhs: P, _ rhs: P) -> [NSLayoutConstraint] {
    return lhs.context.addConstraint(lhs, to: rhs)
}

This gist inspired a pull-request I created on Cartography, see here: robb/Cartography#293. Thanks!