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## user-experience-of-new-integer-protocols.md

      
        
          
            
              
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              August 3, 2017 02:07
            
              
                Notes on the user experience of new integer protocols
              
          
        
      
        
  
      
    Notes on the user experience of new integer protocols

Xiaodi Wu

June 17, 2017
Introduction

The design, re-design, and implementation of [SE-0104][1], a proposal to revise integer protocols in Swift, is now largely complete in shipping previews of Swift 4. As an exercise, I have used the new APIs to develop a [set of additional numeric facilities][2]. Here are some insights gained from that experience--and from two unpublished exercises to implement a BigInt type (one from scratch, one wrapping GMP)--as well as suggestions for improvement.