From 07f0bd4ea93657f8b3158f6aedd8e11721d88015 Mon Sep 17 00:00:00 2001
From: Jesse McCarthy <git_commits@jessemccarthy.net>
Date: Sat, 23 Jan 2016 10:57:42 -0500
Subject: [PATCH] Update AST spec.

* Remove redundant `Node` reference from `Identifier` interface.
  `Expression` already inherits from `Node`.

* Add missing interfaces: `Literal`, `Pattern`.
---
 doc/ast/spec.md | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/doc/ast/spec.md b/doc/ast/spec.md
index 8b360898c7..d37c2265e9 100644
--- a/doc/ast/spec.md
+++ b/doc/ast/spec.md
@@ -141,7 +141,7 @@ interface Position {
 # Identifier
 
 ```js
-interface Identifier <: Node, Expression, Pattern {
+interface Identifier <: Expression, Pattern {
   type: "Identifier";
   name: string;
 }
@@ -151,6 +151,12 @@ An identifier. Note that an identifier may be an expression or a destructuring p
 
 # Literals
 
+```js
+interface Literal <: Expression { }
+```
+
+A literal token. May or may not represent an expression.
+
 ## RegExpLiteral
 
 ```js
@@ -929,6 +935,10 @@ interface TemplateElement <: Node {
 
 # Patterns
 
+```js
+interface Pattern <: Node { }
+```
+
 ## ObjectPattern
 
 ```js