Added foreach in grammar.

modules/lang-painless/src/main/antlr/PainlessParser.g4

@@ -33,6 +33,7 @@ statement
     | WHILE LP expression RP ( trailer | empty )                                               # while
     | DO block WHILE LP expression RP delimiter                                                # do
     | FOR LP initializer? SEMICOLON expression? SEMICOLON afterthought? RP ( trailer | empty ) # for
+    | FOR LP decltype ID COLON expression RP trailer                                           # each
     | declaration delimiter                                                                    # decl
     | CONTINUE delimiter                                                                       # continue
     | BREAK delimiter                                                                          # break

modules/lang-painless/src/main/java/org/elasticsearch/painless/antlr/PainlessParserBaseVisitor.java

@@ -46,6 +46,13 @@ class PainlessParserBaseVisitor<T> extends AbstractParseTreeVisitor<T> implement
    * {@link #visitChildren} on {@code ctx}.</p>
    */
   @Override public T visitFor(PainlessParser.ForContext ctx) { return visitChildren(ctx); }
+  /**
+   * {@inheritDoc}
+   *
+   * <p>The default implementation returns the result of calling
+   * {@link #visitChildren} on {@code ctx}.</p>
+   */
+  @Override public T visitEach(PainlessParser.EachContext ctx) { return visitChildren(ctx); }
   /**
    * {@inheritDoc}
    *

modules/lang-painless/src/main/java/org/elasticsearch/painless/antlr/PainlessParserVisitor.java

@@ -44,6 +44,13 @@ interface PainlessParserVisitor<T> extends ParseTreeVisitor<T> {
    * @return the visitor result
    */
   T visitFor(PainlessParser.ForContext ctx);
+  /**
+   * Visit a parse tree produced by the {@code each}
+   * labeled alternative in {@link PainlessParser#statement}.
+   * @param ctx the parse tree
+   * @return the visitor result
+   */
+  T visitEach(PainlessParser.EachContext ctx);
   /**
    * Visit a parse tree produced by the {@code decl}
    * labeled alternative in {@link PainlessParser#statement}.