c
Micro Composition
What is c
?
c
is a simple composition framework. You have the ability to create transformations that are either unidirectional or bidirectional. There is also a cache that values can be set and resolved.
Where can c
be used?
c
can be used anywhere to create transformations or interact with the cache.
Examples
BiDirectionalTransformation of String and Int
let transformer = c.transformer(
from: { string in Int(string) },
to: { int in "\(String(describing: int))" }
)
let string = transformer.to(3)
let int = transformer.from("3")
try t.assert(transformer.to(int), isEqualTo: string)
Cache
let cache = c.Cache()
cache.set(value: Double.pi, forKey: "🥧")
let pi: Double = cache.get("🥧") ?? 0
try t.assert(pi, isEqualTo: .pi)
let resolvedValue: Double = cache.resolve("🥧")
try t.assert(resolvedValue, isEqualTo: .pi)
cache.remove("🥧")
let nilValue: Double? = cache.get("🥧")
try t.assert(isNil: nilValue)
KeyedCache
enum CacheKey: Hashable { ... }
let cache = c.KeyedCache<CacheKey>()
cache.set(value: Double.pi, forKey: CacheKey.piKey)
let pi: Double = cache.get(.piKey) ?? 0
try t.assert(pi, isEqualTo: .pi)
let resolvedValue: Double = cache.resolve(.piKey)
try t.assert(resolvedValue, isEqualTo: .pi)
cache.remove(.piKey)
let nilValue: Double? = cache.get(.piKey)
try t.assert(isNil: nilValue)
JSON
enum MockJSONKey: String, Hashable {
case name, number, bool, invalid_key
}
struct MockJSON: Codable {
var name: String
var number: Int
var bool: Bool
}
let jsonData: Data = try! JSONEncoder().encode(MockJSON(name: "Twitch", number: 5, bool: false))
let json: c.JSON<MockJSONKey> = .init(data: jsonData)
XCTAssertEqual(json.resolve(.name), "Twitch")
XCTAssertEqual(json.resolve(.number), 5)
XCTAssertEqual(json.resolve(.bool), false)
let invalid_key: Bool? = json.get(.invalid_key)
XCTAssertNil(json.get(.invalid_key))
XCTAssertNil(invalid_key)
json.set(value: "Leif", forKey: .name)
XCTAssertEqual(json.resolve(.name), "Leif"
Global Cache
let someCache: Cache = ...
// Set the value of a Cache with any hashable key
c.set(value: someCache, forKey: "someCache")
// Get an optional Cache using any hashable key
let anotherCache: Cache? = c.get(0)
// Require that a Cache exist using a `.get` with a force unwrap
let requiredCache: Cache = c.resolve(0)
let keyedCache: KeyedCache<String> = c.resolve(...)
Full Changelog: https://github.com/0xOpenBytes/c/compare/0.4.0...1.0.0
Source code(tar.gz)
Source code(zip)