#1258 Java 8 Lambda parse error on direct field access

pmd-java/etc/grammar/Java.jjt

@@ -1,4 +1,8 @@
 /**
+ * Fix for Lambda expressions without variables.
+ *
+ * Andreas Dangel 11/2014
+ *====================================================================
  * Fix for Lambda expressions with two or three variables.
  *
  * Andreas Dangel 07/2014
@@ -1765,6 +1769,7 @@ void PrimaryPrefix() :
   Literal()
 | "this" {jjtThis.setUsesThisModifier();}
 | "super" {jjtThis.setUsesSuperModifier();}
+| LOOKAHEAD( "(" ")" "->" ) LambdaExpression()
 | LOOKAHEAD( <IDENTIFIER> "->" ) LambdaExpression()
 | LOOKAHEAD( "(" VariableDeclaratorId() "," VariableDeclaratorId() ["," VariableDeclaratorId()] ")" "->" ) LambdaExpression()
 | LOOKAHEAD( "(" FormalParameter() "," FormalParameter() ["," FormalParameter() ] ")" "->" ) LambdaExpression()

pmd-java/src/test/resources/net/sourceforge/pmd/ast/ParserCornerCases18.java

@@ -144,6 +144,14 @@ public class ParserCornerCases18 {
             })
             .count();
         }
+        // https://sourceforge.net/p/pmd/bugs/1258/
+        public void lambdaWithPropertyAssignment() {
+            object.event = () -> {
+                Request request = new Request();
+                request.id = 42;
+//                request.setId(42);
+            };
+        }
     }
 }
 

src/site/markdown/overview/changelog.md

@@ -15,6 +15,7 @@
 * [#1253](https://sourceforge.net/p/pmd/bugs/1253/): Document default behaviour when CPD command line arguments "encoding" and "ignoreAnnotations" are not specified
 * [#1255](https://sourceforge.net/p/pmd/bugs/1255/): UseUtilityClass false positive with Exceptions
 * [#1256](https://sourceforge.net/p/pmd/bugs/1256/): PositionLiteralsFirstInComparisons false positive with Characters
+* [#1258](https://sourceforge.net/p/pmd/bugs/1258/): Java 8 Lambda parse error on direct field access
 * [#1259](https://sourceforge.net/p/pmd/bugs/1259/): CloseResource rule ignores conditionnals within finally blocks
 * [#1261](https://sourceforge.net/p/pmd/bugs/1261/): False positive "Avoid unused private methods" with Generics
 * [#1262](https://sourceforge.net/p/pmd/bugs/1262/): False positive for MissingBreakInSwitch