💥 change VDirectiveKey AST (refs #39)

It's strange if a property can be either an AST node or other primitive value. It should not mix AST nodes and primitive values which are
except null.
Therefore, this commit changes the member of VDirectiveKey node to AST
nodes from the mix of string and AST node.

Author: mysticatea

docs/ast.md

@@ -55,6 +55,7 @@ extend interface Node {
 interface VIdentifier <: Node {
     type: "VIdentifier"
     name: string
+    rawName: string
 }
 ```
 
@@ -140,9 +141,9 @@ interface VFilter <: Node {
 ```js
 interface VDirectiveKey <: Node {
     type: "VDirectiveKey"
-    name: string
-    argument: VExpressionContainer | string | null
-    modifiers: [ string ]
+    name: VIdentifier
+    argument: VExpressionContainer | VIdentifier | null
+    modifiers: [ VIdentifier ]
     shorthand: boolean
 }
 ```

src/ast/nodes.ts

@@ -757,28 +757,21 @@ export interface VExpressionContainer extends HasLocation, HasParent {
  */
 export interface VIdentifier extends HasLocation, HasParent {
     type: "VIdentifier"
-    parent: VAttribute
+    parent: VAttribute | VDirectiveKey
     name: string
     rawName: string
 }
 
-export interface DirectiveKeyParts {
-    name: string
-    argument: string | null
-    modifiers: string[]
-}
-
 /**
  * Attribute name nodes.
  */
 export interface VDirectiveKey extends HasLocation, HasParent {
     type: "VDirectiveKey"
     parent: VAttribute
-    name: string
-    argument: VExpressionContainer | string | null
-    modifiers: string[]
+    name: VIdentifier
+    argument: VExpressionContainer | VIdentifier | null
+    modifiers: VIdentifier[]
     shorthand: boolean
-    raw: DirectiveKeyParts
 }
 
 /**

src/ast/traverse.ts

@@ -12,7 +12,7 @@ import { Node } from "./nodes"
 
 const KEYS = Evk.unionWith({
     VAttribute: ["key", "value"],
-    VDirectiveKey: ["argument"],
+    VDirectiveKey: ["name", "argument", "modifiers"],
     VDocumentFragment: ["children"],
     VElement: ["startTag", "children", "endTag"],
     VEndTag: [],