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public protocol ProtocolUnrelatedToPrinting {}
public struct StructPrintable : CustomStringConvertible,
ProtocolUnrelatedToPrinting {
let x: Int
public init(_ x: Int) {
self.x = x
}
public var description: String {
return "►\(x)◀︎"
}
}
public struct LargeStructPrintable : CustomStringConvertible,
ProtocolUnrelatedToPrinting {
let a: Int
let b: Int
let c: Int
let d: Int
public init(_ a: Int, _ b: Int, _ c: Int, _ d: Int) {
self.a = a
self.b = b
self.c = c
self.d = d
}
public var description: String {
return "<\(a) \(b) \(c) \(d)>"
}
}
public struct StructDebugPrintable : CustomDebugStringConvertible {
let x: Int
public init(_ x: Int) {
self.x = x
}
public var debugDescription: String {
return "►\(x)◀︎"
}
}
public struct StructVeryPrintable : CustomStringConvertible,
CustomDebugStringConvertible, ProtocolUnrelatedToPrinting {
let x: Int
public init(_ x: Int) {
self.x = x
}
public var description: String {
return "<description: \(x)>"
}
public var debugDescription: String {
return "<debugDescription: \(x)>"
}
}
public struct EmptyStructWithoutDescription {
public init() {}
}
public struct WithoutDescription {
let x: Int
public init(_ x: Int) {
self.x = x
}
}
public struct ValuesWithoutDescription<T, U, V> {
let t: T
let u: U
let v: V
public init(_ t: T, _ u: U, _ v: V) {
self.t = t
self.u = u
self.v = v
}
}
public class ClassPrintable : CustomStringConvertible,
ProtocolUnrelatedToPrinting {
let x: Int
public init(_ x: Int) {
self.x = x
}
public var description: String {
return "►\(x)◀︎"
}
}
public class ClassVeryPrintable : CustomStringConvertible,
CustomDebugStringConvertible, ProtocolUnrelatedToPrinting {
let x: Int
public init(_ x: Int) {
self.x = x
}
public var description: String {
return "<description: \(x)>"
}
public var debugDescription: String {
return "<debugDescription: \(x)>"
}
}
public enum MyStringError: Error {
case failure
}
public struct MyString : ExpressibleByStringLiteral,
ExpressibleByStringInterpolation {
public init(str: String) {
value = str
}
public var value: String
public init(unicodeScalarLiteral value: String) {
self.init(str: value)
}
public init(extendedGraphemeClusterLiteral value: String) {
self.init(str: value)
}
public init(stringLiteral value: String) {
self.init(str: value)
}
public init(stringInterpolation: StringInterpolation) {
self.init(str: stringInterpolation.result)
}
public struct StringInterpolation: StringInterpolationProtocol {
var result: String
public init(literalCapacity: Int, interpolationCount: Int) {
result = String(literalCapacity) + "/" + String(interpolationCount)
}
public mutating func appendLiteral(_ literal: String) {
result += "<literal " + literal + ">"
}
public mutating func appendInterpolation<T>(_ expr: T) {
result += "<interpolation:T " + String(describing: expr) + ">"
}
public mutating func appendInterpolation(_ expr: Int) {
result += "<interpolation:Int " + String(expr) + ">"
}
public mutating func appendInterpolation(_ expr: Int, radix: Int) {
result += "<interpolation:Int,radix " + String(expr, radix: radix) + ">"
}
public mutating func appendInterpolation<T>(debug: T) {
result += "<interpolation:T debug: " + String(reflecting: debug) + ">"
}
public mutating func appendInterpolation(fails: Bool) throws {
if fails {
throw MyStringError.failure
}
result += "<interpolation:fails >"
}
public mutating
func appendInterpolation(required: Bool, optional: Bool = false) {
result += "<interpolation:required:optional " +
String(reflecting: required) + " " + String(reflecting: optional) + ">"
}
}
}
public struct MySimpleString : ExpressibleByStringInterpolation {
public var value: String
public init(stringLiteral: String) {
value = stringLiteral
}
}
|
