Kicking off r2

README.md

@@ -10,9 +10,7 @@ specification phase. There is no grammar, parser, compiler, or way to use any
 Ava code. Ava is a way to get ideas out of my head, challenged, and further
 explored.
 
-## Notes
+## Documentation
 
-These notes are not guaranteed to be up to date and represent a large amount of
-brainstorming and trying/discarding of ideas.
-
-Please start with the [Table of Contents](./notes/table-of-contents.md)
+Please start with the [Documentation Contents](./docs), which provides links to
+different iterations of the language.

docs/README.md

@@ -0,0 +1,6 @@
+# Ava Documentation
+
+This documentation is currently organized by revision, where major updates are
+made to the specification.
+
+- [R2](./revision2.md)

docs/revision2.md

@@ -0,0 +1,66 @@
+# Ava R2
+
+This document specifies the second revision of the Ava programming language,
+started 2024-07-18.
+
+## Example
+
+- TODO: Disambiguate `fn` with and without implementation.
+
+```
+fn not: Boolean -> Boolean
+    λ false => true
+    λ true => false
+end fn
+
+given A
+given B
+class Eq
+    fn eq: A -> B -> Boolean
+
+    fn neq: A -> B -> Boolean
+        λ x y => not (eq x y)
+    end fn
+
+    infix =: A -> B -> Boolean
+        λ x y => eq x y
+    end infix
+
+    infix !=: A -> B -> Boolean
+        λ x y => neq x y
+    end infix
+end class
+
+given F *
+class Functor
+    --- Transform some wrapped data from one type to another, preserving the
+    --- wrapper.
+    ---
+    --- @tparam A The type of input data.
+    --- @tparam B The type of output data.
+    given A
+    given B
+    fn map: F A -> (A -> B) -> F B
+end class
+
+given A
+class Semigroup
+    fn combine: A -> A -> A
+end class
+
+given A :: Semigroup
+class Monoid
+    fn empty: A
+end class
+
+fn silly_string: String -> Int32
+    λ "foo" => 1
+    λ "bar" => 2
+    λ baz =>
+        -- No reason to do this, but demonstrates the syntax.
+        baz match
+            case "baz" => 3
+            case _ => 4
+        end match
+end fn
+```