antonvmironov

// from https://github.com/apple/swift-log/blob/main/Sources/Logging/MetadataProvider.swift#L15
#if canImport(Darwin) // macOS, iOS, tvOS, visionOS, ...
import Darwin
#elseif os(Windows)
import CRT
#elseif canImport(Glibc) // vanilla linux
import Glibc
#elseif canImport(Android)
import Android
#elseif canImport(Musl) // ...The Static Linux SDK does not use Glibc; instead, it is built on top of an alternative C library for Linux called Musl...

antonvmironov

protocol BaseProtocol {
  associatedtype Base

  func export(base: Base) -> String
}

protocol ExtendedProtocol: BaseProtocol {
  associatedtype Left
  associatedtype Right
  typealias Base = (left: Left, right: Right) // associatedtype requirement must be satisfied here

antonvmironov

protocol SequenceYouCanInsertInto: Sequence {
  init()
  mutating func mySuperInsert(_ element: Iterator.Element)
}

extension Sequence {
  func mySuperFilter<T: SequenceYouCanInsertInto>(_ predicate: (Iterator.Element) throws -> Bool) rethrows -> T where Iterator.Element == T.Iterator.Element {
    var result = T()

    for value in self {