fix: 语法问题

src/main/grammar/main.bnf

@@ -291,14 +291,16 @@ private FieldDeclaration ::= PropertyName ':' Type
 CodeBlock ::= '{' Statement* '}'{
     pin=1
 }
-private Statement ::=  (ReturnStatement|IfElseStatement|ExpressionStatement) ';'?{
-    recoverWhile=recoverWhileForComponentBody
+private Statement ::=  (ReturnStatement|IfElseStatement|ExpressionStatement) ';'*{
+}
+ExpressionStatement ::= Expression (';'+ | &'}') {
+    pin=1
+//    recoverWhile=recoverWhileForComponentBody
 }
-ExpressionStatement ::= Expression (';' &Statement)?
 
 //private recoverWhileStatement::=!(GenericIdentifier|';'|'}')
 
-ReturnStatement ::= 'return' (Expression)?{
+ReturnStatement ::= ReturnKeyword (Expression)?{
     pin=1
 }
 private IfElseStatement ::= IfStatement (ElseIfStatement)* ElseStatement?{
@@ -504,7 +506,7 @@ AnimateKeyword::='animate'
 OutKeyword::='out'
 InOutKeyword::='in-out'
 PrivateKeyword::='private'
-
+ReturnKeyword::='return'
 //---------NamedIdentifier ,简化PsiTree-----------------------------------
 //noinspection BnfUnusedRule 用于标记命名节点对应的identifier
 Named ::=  PropertyName | TypeName |ExternalName | InternalName|ComponentName|FunctionName{