Gwendal Roué groue

## gist:401e88b7148bc126adb3
import Mustache

// Wrap the result in a section, and the key `cycleKey` will enumerate and cycle
// around boxes, one after the other.
func cyclingBox(key cycleKey: String, #boxes: [MustacheBox]) -> MustacheBox {
    var index = 0
    return Box { (key: String) in
        if key == cycleKey {
            let box = boxes[index]
            index = (index + 1) % boxes.count

## SwiftProtocols.md

      
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                groue
                / SwiftProtocols.md
            
            
              Last active
              August 29, 2015 14:25
            
          
    This blog post shows how Swift protocols can help using CoreData: http://martiancraft.com/blog/2015/07/objective-c-swift-core-data/
Following this advice, I have tried this technique, with success, but with a request for improvement.
Below you will find a bare minimal view of the API I'm working on. Notice the not nice Person.self in the line db.fetchAll(Person.self, "SELECT * FROM persons"). I want to improve that, and the linked blog post was a great deal of inspiration.
// Library
class RowModel {} // Equivalent of NSManagedObject in Core Data
class Database {

  
## SwiftCompilerCrash.swift
// Library code
class Model { }
protocol Fetchable {
    typealias FetchableType
    static func fetchAll(sql: String) -> [FetchableType]
}

extension Fetchable where Self : Model, FetchableType == Self {
    static func fetchAll(sql: String) -> [FetchableType] {
        return []   // bare minimal, for demonstration purpose

## SwiftCompilerOddity.swift
// Library code
class Model { }
protocol Fetchable {
    typealias FetchableType = Self
    static func fetchAll(sql: String) -> [FetchableType]
}

extension Fetchable where Self : Model, FetchableType == Self {
    static func fetchAll(sql: String) -> [FetchableType] {
        return []   // bare minimal, for demonstration purpose

## SwiftCompilerOddity2.swift
// Library code
class Model { }
protocol Fetchable {
    typealias FetchableType = Self
    static func fetchAll(sql: String) -> [FetchableType]
}

extension Fetchable where Self : Model, FetchableType == Self {
    static func fetchAll(sql: String) -> [FetchableType] {
        return []   // bare minimal, for demonstration purpose

## silentValueForKey.m
// helper function for silentValueForKey
id silentValueForUndefinedKey(id self, SEL _cmd, NSString *key) {
	return nil;
}

// The purpose of this function is to have the same result as
// [object valueForKey:key], but instead of letting [NSObject valueForUndefinedKey:]
// raise an NSUndefinedKeyException, it silently returns nil instead.
id silentValueForKey(id object, NSString *key) {
	// Does object provide the same implementations of valueForKey: and valueForUndefinedKey: as NSObject?

## gist:1855111
layout.mustache:
    <html>
    <head><title>{{{$yield title}}}</title></head>
    <body>
    {{>navigation}}
    <div class="content">
    {{{$yield}}}
    </div>
    {{>footer}}
    </body>

## gist:1855986
super.mustache:
    <html>
    <head><title>{{{title}}}</title></head>
    <body>
    {{>navigation}}
    <div class="content">
    {{{content}}}
    </div>
    {{>footer}}
    </body>

## Document.mustache
{{#movie}}
  {{link}}
  {{#director}}
    by {{link}}
  {{/director}}
{{/movie}}

## _documentation.md

      
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                groue
                / _documentation.md
            
            
              Created
              September 22, 2012 11:04
            
              
                GRMustache: variable tag that renders a dynamic partial
              
          
    Documentation of rendering objects: https://github.com/groue/GRMustache/blob/master/Guides/rendering_objects.md
	import Mustache

	// Wrap the result in a section, and the key `cycleKey` will enumerate and cycle
	// around boxes, one after the other.
	func cyclingBox(key cycleKey: String, #boxes: [MustacheBox]) -> MustacheBox {
	var index = 0
	return Box { (key: String) in
	if key == cycleKey {
	let box = boxes[index]
	index = (index + 1) % boxes.count
	// Library code
	class Model { }
	protocol Fetchable {
	typealias FetchableType
	static func fetchAll(sql: String) -> [FetchableType]
	}

	extension Fetchable where Self : Model, FetchableType == Self {
	static func fetchAll(sql: String) -> [FetchableType] {
	return [] // bare minimal, for demonstration purpose
	// helper function for silentValueForKey
	id silentValueForUndefinedKey(id self, SEL _cmd, NSString *key) {
	return nil;
	}

	// The purpose of this function is to have the same result as
	// [object valueForKey:key], but instead of letting [NSObject valueForUndefinedKey:]
	// raise an NSUndefinedKeyException, it silently returns nil instead.
	id silentValueForKey(id object, NSString *key) {
	// Does object provide the same implementations of valueForKey: and valueForUndefinedKey: as NSObject?
	layout.mustache:
	<html>
	<head><title>{{{$yield title}}}</title></head>
	<body>
	{{>navigation}}
	<div class="content">
	{{{$yield}}}
	</div>
	{{>footer}}
	</body>
	super.mustache:
	<html>
	<head><title>{{{title}}}</title></head>
	<body>
	{{>navigation}}
	<div class="content">
	{{{content}}}
	</div>
	{{>footer}}
	</body>
	{{#movie}}
	{{link}}
	{{#director}}
	by {{link}}
	{{/director}}
	{{/movie}}