Making base properties on collection wrappers all internal (#85)

Author: LucianoPAlmeida

Sources/Algorithms/Chain.swift

@@ -14,10 +14,12 @@ public struct Chain2<Base1: Sequence, Base2: Sequence>
   where Base1.Element == Base2.Element
 {
   /// The first sequence in this chain.
-  public let base1: Base1
+  @usableFromInline
+  internal let base1: Base1
 
   /// The second sequence in this chain.
-  public let base2: Base2
+  @usableFromInline
+  internal let base2: Base2
 
   @inlinable
   internal init(base1: Base1, base2: Base2) {

Sources/Algorithms/Chunked.swift

@@ -13,7 +13,8 @@
 /// predicate or projection.
 public struct LazyChunked<Base: Collection, Subject> {
   /// The collection that this instance provides a view onto.
-  public let base: Base
+  @usableFromInline
+  internal let base: Base
 
   /// The projection function.
   @usableFromInline

Sources/Algorithms/Combinations.swift

@@ -12,7 +12,8 @@
 /// A collection wrapper that generates combinations of a base collection.
 public struct Combinations<Base: Collection> {
   /// The collection to iterate over for combinations.
-  public let base: Base
+  @usableFromInline
+  internal let base: Base
 
   @usableFromInline
   internal let baseCount: Int

Sources/Algorithms/Cycle.swift

@@ -12,7 +12,8 @@
 /// A collection wrapper that repeats the elements of a base collection.
 public struct Cycle<Base: Collection> {
   /// The collection to repeat.
-  public let base: Base
+  @usableFromInline
+  internal let base: Base
 
   @inlinable
   internal init(base: Base) {
@@ -24,10 +25,10 @@ extension Cycle: Sequence {
   /// The iterator for a `Cycle` sequence.
   public struct Iterator: IteratorProtocol {
     @usableFromInline
-    let base: Base
+    internal let base: Base
 
     @usableFromInline
-    var current: Base.Index
+    internal var current: Base.Index
 
     @inlinable
     internal init(base: Base) {

Sources/Algorithms/Indexed.swift

@@ -16,7 +16,8 @@ public struct Indexed<Base: Collection> {
   public typealias Element = (index: Base.Index, element: Base.Element)
 
   /// The base collection.
-  public let base: Base
+  @usableFromInline
+  internal let base: Base
 
   @inlinable
   internal init(base: Base) {

Sources/Algorithms/Permutations.swift

@@ -78,7 +78,8 @@ extension MutableCollection
 /// A sequence of all the permutations of a collection's elements.
 public struct Permutations<Base: Collection> {
   /// The base collection to iterate over for permutations.
-  public let base: Base
+  @usableFromInline
+  internal let base: Base
 
   @usableFromInline
   internal let baseCount: Int
@@ -137,7 +138,7 @@ extension Permutations: Sequence {
   /// The iterator for a `Permutations` instance.
   public struct Iterator: IteratorProtocol {
     @usableFromInline
-    internal var base: Base
+    internal let base: Base
 
     @usableFromInline
     internal let baseCount: Int

Sources/Algorithms/Product.swift

@@ -12,9 +12,12 @@
 /// A sequence that represents the product of two sequences' elements.
 public struct Product2<Base1: Sequence, Base2: Collection> {
   /// The outer sequence in the product.
-  public let base1: Base1
+  @usableFromInline
+  internal let base1: Base1
+  
   /// The inner sequence in the product.
-  public let base2: Base2
+  @usableFromInline
+  internal let base2: Base2
 
   @inlinable
   internal init(_ base1: Base1, _ base2: Base2) {

Sources/Algorithms/Windows.swift

@@ -47,8 +47,11 @@ extension Collection {
 /// A collection wrapper that presents a sliding window over the elements of
 /// a collection.
 public struct Windows<Base: Collection> {
-  public let base: Base
-  public let size: Int
+  @usableFromInline
+  internal let base: Base
+  
+  @usableFromInline
+  internal let size: Int
 
   @usableFromInline
   internal var firstUpperBound: Base.Index?