diff --git a/AST.md b/AST.md
index 7555620..6bb14a1 100644
--- a/AST.md
+++ b/AST.md
@@ -39,20 +39,21 @@ interface JSXNamespacedName <: Expression {
 JSX Expression Container
 ------------------------
 
-JSX adds empty "expression" type in order to allow comments in JSX text:
+The expression container node contains statements with the same grammar as a generator body. Also it has a flag to indicate whether it is an expression. Any expression used as attribute value or inside JSX text should be wrapped by expression container:
 
 ```js
-interface JSXEmptyExpression <: Node {
-    type: "JSXEmptyExpression";
+interface JSXExpressionContainer <: Node {
+    type: "JSXExpressionContainer";
+    expression: Expression | JSXEmptyExpression | JSXStatementList;
+    isExpression: boolean;
 }
 ```
 
-Any expression used as attribute value or inside JSX text should is wrapped into expression container:
-
 ```js
-interface JSXExpressionContainer <: Node {
-    type: "JSXExpressionContainer";
-    expression: Expression | JSXEmptyExpression;
+interface JSXStatementList <: Node {
+  type: "JSXStatementList";
+  body: [ Statement ];
+  generator: boolean;
 }
 ```
 
diff --git a/README.md b/README.md
index 1a67818..8df7da9 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@ PrimaryExpression :
 
 - JSXElement
 - JSXFragment
+- JSXGeneratorExpression
 
 __Elements__
 
@@ -114,10 +115,19 @@ JSXAttributeValue :

 
 - `"` JSXDoubleStringCharacters<sub>opt</sub> `"`
 - `'` JSXSingleStringCharacters<sub>opt</sub> `'`
-- `{` AssignmentExpression `}`
+- `{` JSXGeneratorExpression `}`
 - JSXElement
 - JSXFragment
 
+JSXGeneratorExpression :
+
+- ObjectLiteral
+- FunctionExpression
+- ClassExpression
+- GeneratorExpression
+- AsyncFunctionExpression
+- [lookahead &#8713; { `{` }] StatementList<sub>[+Yield]</sub>
+
 JSXDoubleStringCharacters :

 
 - JSXDoubleStringCharacter JSXDoubleStringCharacters<sub>opt</sub>
@@ -157,7 +167,7 @@ JSXTextCharacter :
 
 JSXChildExpression :
 
-- AssignmentExpression
+- JSXGeneratorExpression
 - `...` AssignmentExpression
 
 __Whitespace and Comments__