Renaming

HBMustacheMethods -> HBMustacheTransformable
HBMustacheContext -> HBMustacheSequenceContext

Sources/HummingbirdMustache/SequenceContext.swift

@@ -0,0 +1,41 @@
+
+/// Context that current object inside a sequence is being rendered in. Only relevant when rendering a sequence
+struct HBMustacheSequenceContext: HBMustacheTransformable {
+    var first: Bool
+    var last: Bool
+    var index: Int
+
+    init(first: Bool = false, last: Bool = false) {
+        self.first = first
+        self.last = last
+        index = 0
+    }
+
+    /// Transform `HBMustacheContext`. These are available when processing elements
+    /// of a sequence.
+    ///
+    /// Format your mustache as follows to accept them. They look like a function without any arguments
+    /// ```
+    /// {{#sequence}}{{index()}}{{/sequence}}
+    /// ```
+    ///
+    /// Transforms available are `first`, `last`, `index`, `even` and `odd`
+    /// - Parameter name: Method name
+    /// - Returns: Result
+    func transform(_ name: String) -> Any? {
+        switch name {
+        case "first":
+            return first
+        case "last":
+            return last
+        case "index":
+            return index
+        case "even":
+            return (index & 1) == 0
+        case "odd":
+            return (index & 1) == 1
+        default:
+            return nil
+        }
+    }
+}