diff --git a/AST.md b/AST.md
index 7555620..7e43f87 100644
--- a/AST.md
+++ b/AST.md
@@ -47,12 +47,22 @@ interface JSXEmptyExpression <: Node {
 }
 ```
 
-Any expression used as attribute value or inside JSX text should is wrapped into expression container:
+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 is wrapped into expression container:
 
 ```js
 interface JSXExpressionContainer <: Node {
     type: "JSXExpressionContainer";
-    expression: Expression | JSXEmptyExpression;
+    expression: Expression | JSXEmptyExpression | JSXBlockStatement;
+    isExpression: boolean;
+}
+```
+
+From `BlockStatement`, this inherits `body: [ Statement ];`.
+
+```js
+interface JSXBlockStatement <: BlockStatement {
+  type: "JSXStatementList";
+  generator: boolean;
 }
 ```
 
diff --git a/README.md b/README.md
index 1a67818..71f2815 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,7 @@ PrimaryExpression :
 
 - JSXElement
 - JSXFragment
+- JSXGeneratorExpressionContainer
 
 __Elements__
 
@@ -115,9 +116,21 @@ JSXAttributeValue :

 - `"` JSXDoubleStringCharacters<sub>opt</sub> `"`
 - `'` JSXSingleStringCharacters<sub>opt</sub> `'`
 - `{` AssignmentExpression `}`
+- JSXGeneratorExpressionContainer
 - JSXElement
 - JSXFragment
 
+JSXGeneratorExpressionContainer :
+- `*` `{` JSXGeneratorExpression<sub>opt</sub> `}`
+
+JSXGeneratorExpression :
+- ObjectLiteral
+- FunctionExpression
+- ClassExpression
+- GeneratorExpression
+- AsyncFunctionExpression
+- FunctionBody<sub>[+Yield, ~Await, ~Return]</sub>
+
 JSXDoubleStringCharacters :

 
 - JSXDoubleStringCharacter JSXDoubleStringCharacters<sub>opt</sub>
@@ -145,15 +158,17 @@ JSXChild :
 - JSXText
 - JSXElement
 - JSXFragment
+- JSXGeneratorExpressionContainer
 - `{` JSXChildExpression<sub>opt</sub> `}`
 
 JSXText :
 
 - JSXTextCharacter JSXText<sub>opt</sub>
+- [lookahead &#8713; { `{` }] `*` JSXText<sub>opt</sub>
 
 JSXTextCharacter :
 
-- SourceCharacter __but not one of `{`, `<`, `>` or `}`__
+- SourceCharacter __but not one of `*`, `{`, `<`, `>` or `}`__
 
 JSXChildExpression :