Add more repositories to validate parsing and fix a few more cases.

This adds the following repositories:
* Apache Flink
* Apache Log4j2
* Apache Cassandra

The grammar has been updated to address the following cases:
* Reserved identifiers used as a lambda parameter
* Enum declared inside an annotation
* Conflict between switch as a statement or an expression when used in
  the following pattern:
```java
switch(foo) {
  ...
}
++bar;
```

Author: bmahe

grammar.js

@@ -4,7 +4,6 @@ const PREC = {
   // https://introcs.cs.princeton.edu/java/11precedence/
   COMMENT: 0,      // //  /*  */
   ASSIGN: 1,       // =  += -=  *=  /=  %=  &=  ^=  |=  <<=  >>=  >>>=
-  SWITCH_EXP: 1,   // always prefer to parse switch as expression over statement
   DECL: 2,
   ELEMENT_VAL: 2,
   TERNARY: 3,      // ?:
@@ -66,6 +65,7 @@ module.exports = grammar({
     [$._unannotated_type, $.scoped_type_identifier],
     [$._unannotated_type, $.generic_type],
     [$.generic_type, $.primary_expression],
+    [$.expression, $.statement],
     // Only conflicts in switch expressions
     [$.lambda_expression, $.primary_expression],
   ],
@@ -174,7 +174,7 @@ module.exports = grammar({
       $.primary_expression,
       $.unary_expression,
       $.cast_expression,
-      prec(PREC.SWITCH_EXP, $.switch_expression),
+      $.switch_expression,
     ),
 
     cast_expression: $ => prec(PREC.CAST, seq(
@@ -232,7 +232,7 @@ module.exports = grammar({
 
     lambda_expression: $ => seq(
       field('parameters', choice(
-        $.identifier, $.formal_parameters, $.inferred_parameters
+        $.identifier, $.formal_parameters, $.inferred_parameters, $._reserved_identifier
       )),
       '->',
       field('body', choice($.expression, $.block))
@@ -920,6 +920,7 @@ module.exports = grammar({
         $.constant_declaration,
         $.class_declaration,
         $.interface_declaration,
+        $.enum_declaration,
         $.annotation_type_declaration
       )),
       '}'

script/known-failures.txt

@@ -0,0 +1,3 @@
+examples/flink/flink-quickstart/flink-quickstart-java/src/main/resources/archetype-resources/src/main/java/DataStreamJob.java
+examples/flink/flink-walkthroughs/flink-walkthrough-datastream-java/src/main/resources/archetype-resources/src/main/java/FraudDetectionJob.java
+examples/flink/flink-walkthroughs/flink-walkthrough-datastream-java/src/main/resources/archetype-resources/src/main/java/FraudDetector.java

script/parse-examples

@@ -28,6 +28,9 @@ function clone_repo {
 clone_repo elastic elasticsearch 4d62640bf116af7e825d89c7319a39c3f2f325b4
 clone_repo google guava v31.1
 clone_repo ReactiveX RxJava v3.1.5
+clone_repo apache flink release-1.15.1
+clone_repo apache logging-log4j2 rel/2.17.2
+clone_repo apache cassandra cassandra-4.0.5
 
 known_failures="$(cat script/known-failures.txt)"
 

src/grammar.json

@@ -1194,12 +1194,8 @@
           "name": "cast_expression"
         },
         {
-          "type": "PREC",
-          "value": 1,
-          "content": {
-            "type": "SYMBOL",
-            "name": "switch_expression"
-          }
+          "type": "SYMBOL",
+          "name": "switch_expression"
         }
       ]
     },
@@ -2041,6 +2037,10 @@
               {
                 "type": "SYMBOL",
                 "name": "inferred_parameters"
+              },
+              {
+                "type": "SYMBOL",
+                "name": "_reserved_identifier"
               }
             ]
           }
@@ -5814,6 +5814,10 @@
                 "type": "SYMBOL",
                 "name": "interface_declaration"
               },
+              {
+                "type": "SYMBOL",
+                "name": "enum_declaration"
+              },
               {
                 "type": "SYMBOL",
                 "name": "annotation_type_declaration"
@@ -7017,6 +7021,10 @@
       "generic_type",
       "primary_expression"
     ],
+    [
+      "expression",
+      "statement"
+    ],
     [
       "lambda_expression",
       "primary_expression"

src/node-types.json

@@ -483,6 +483,10 @@
           "type": "constant_declaration",
           "named": true
         },
+        {
+          "type": "enum_declaration",
+          "named": true
+        },
         {
           "type": "interface_declaration",
           "named": true