simplified associations by removing the optional interstitial attribu…

…tes that could appear between |attributes|

gram.ne

@@ -12,7 +12,7 @@ PatternElement -> (Annotation _):* (Subject | Path | Reference)
 Subject -> "[" _ Attributes _ Association:? "]"
   {% () => `(subject)` %}
 
-Association -> "|" (Labels:? Record:? _ "|"):? _ Pattern
+Association -> "|" _ Pattern
 
 Reference -> Identity
   {% () => `(reference)` %}

src/lib/generated-grammar.ts

@@ -70,14 +70,7 @@ const grammar: Grammar = {
     {"name": "Subject$ebnf$1", "symbols": ["Association"], "postprocess": id},
     {"name": "Subject$ebnf$1", "symbols": [], "postprocess": () => null},
     {"name": "Subject", "symbols": [{"literal":"["}, "_", "Attributes", "_", "Subject$ebnf$1", {"literal":"]"}], "postprocess": () => `(subject)`},
-    {"name": "Association$ebnf$1$subexpression$1$ebnf$1", "symbols": ["Labels"], "postprocess": id},
-    {"name": "Association$ebnf$1$subexpression$1$ebnf$1", "symbols": [], "postprocess": () => null},
-    {"name": "Association$ebnf$1$subexpression$1$ebnf$2", "symbols": ["Record"], "postprocess": id},
-    {"name": "Association$ebnf$1$subexpression$1$ebnf$2", "symbols": [], "postprocess": () => null},
-    {"name": "Association$ebnf$1$subexpression$1", "symbols": ["Association$ebnf$1$subexpression$1$ebnf$1", "Association$ebnf$1$subexpression$1$ebnf$2", "_", {"literal":"|"}]},
-    {"name": "Association$ebnf$1", "symbols": ["Association$ebnf$1$subexpression$1"], "postprocess": id},
-    {"name": "Association$ebnf$1", "symbols": [], "postprocess": () => null},
-    {"name": "Association", "symbols": [{"literal":"|"}, "Association$ebnf$1", "_", "Pattern"]},
+    {"name": "Association", "symbols": [{"literal":"|"}, "_", "Pattern"]},
     {"name": "Reference", "symbols": ["Identity"], "postprocess": () => `(reference)`},
     {"name": "Path", "symbols": ["Node"], "postprocess": () => `(node)`},
     {"name": "Path", "symbols": ["Relationship"], "postprocess": () => `(relationship)`},

src/lib/gram-relationships.spec.ts

@@ -23,10 +23,11 @@ describe('relationship patterns', () => {
     expect(Either.isRight(result)).toBeTruthy();
   })
 })
-describe('relationship attributes', () => {
+describe('relationship identifiers', () => {
   test.each([
     '()-[a]->()',
-    '()-["a"]->()'
+    '()-["a"]->()',
+    '()-[2]->()'
   ])
   ('can be: %s', async (gram) => {
     const task = parse(gram);