feat: turtle-star spec tests are passing

Author: jeswr

src/N3Parser.js

@@ -199,7 +199,7 @@ export default class N3Parser {
     case '(':
       // Lists are not allowed inside quoted triples
       if (this._contextStack.length > 0 && this._contextStack[this._contextStack.length - 1].type === '<<') {
-        return this._error(`Unexpected list inside quoted triple`, token);
+        return this._error('Unexpected list inside quoted triple', token);
       }
       // Start a new list
       this._saveContext('list', this._graph, this.RDF_NIL, null, null);
@@ -321,7 +321,7 @@ export default class N3Parser {
     case '(':
       // Lists are not allowed inside quoted triples
       if (this._contextStack.length > 0 && this._contextStack[this._contextStack.length - 1].type === '<<') {
-        return this._error(`Unexpected list inside quoted triple`, token);
+        return this._error('Unexpected list inside quoted triple', token);
       }
       // Start a new list
       this._saveContext('list', this._graph, this._subject, this._predicate, this.RDF_NIL);
@@ -370,9 +370,11 @@ export default class N3Parser {
     if (token.type === ']') {
       this._subject = null;
       return this._readBlankNodeTail(token);
-    } else if (this._contextStack.length > 1 && this._contextStack[this._contextStack.length - 2].type === '<<') {
-      return this._error('Compound blank node expressions not permitted within quoted triples', token)
-    } else {
+    }
+    else if (this._contextStack.length > 1 && this._contextStack[this._contextStack.length - 2].type === '<<') {
+      return this._error('Compound blank node expressions not permitted within quoted triples', token);
+    }
+    else {
       this._predicate = null;
       return this._readPredicate(token);
     }
@@ -896,10 +898,21 @@ export default class N3Parser {
 
     // ### `_readRDFStarTail` reads the end of a nested RDF* triple
   _readAnnotatedTail(token) {
-    this._emit(this._subject, this._predicate, this._object, this._graph);
       // if (this._subject && this._predicate && this._object) {
     //   this._emit(this._subject, this._predicate, this._object, this._graph);
     // }
+    if (token.type === '{|') {
+      this._saveContext('{|', this._graph, this._subject, this._predicate, this._object);
+
+      // Note - we always use the default graph for the quoted triple component
+      this._subject = this._quad(this._subject, this._predicate, this._object, this.DEFAULTGRAPH);
+      this._predicate = null;
+      this._object = null;
+      return this._readPredicate;
+    } else {
+      this._emit(this._subject, this._predicate, this._object, this._graph);
+    }
+
     if (token.type !== '|}')
       return this._readPredicate;
     this._restoreContext('{|', token);

test/N3Parser-test.js

@@ -1130,7 +1130,7 @@ describe('Parser', () => {
       shouldNotParse('<< () <a> <b> >> <c> <d>.',
         'Unexpected list inside quoted triple on line 1.'
       ));
-  
+
     it('should not parse non-empty list inside quoted triple subject',
       shouldNotParse('<< ( <f> ) <a> <b> >> <c> <d>.',
         'Unexpected list inside quoted triple on line 1.'
@@ -1140,7 +1140,7 @@ describe('Parser', () => {
       shouldNotParse('<< <a> () <b> >> <c> <d>.',
         'Expected entity but got ( on line 1.'
       ));
-  
+
     it('should not parse non-empty list inside quoted triple predicate',
       shouldNotParse('<< <a> ( <f> ) <b> >> <c> <d>.',
         'Expected entity but got ( on line 1.'
@@ -1150,7 +1150,7 @@ describe('Parser', () => {
       shouldNotParse('<< <a> <b> () >> <c> <d>.',
         'Unexpected list inside quoted triple on line 1.'
     ));
-  
+
     it('should not parse non-empty list inside quoted triple object',
       shouldNotParse('<< <a> <b> ( <f> ) >> <c> <d>.',
         'Unexpected list inside quoted triple on line 1.'
@@ -1225,6 +1225,12 @@ describe('Parser', () => {
           ['a', 'b', 'c'],
           [['a', 'b', 'c'], 'd', 'e']));
 
+    it('should parse an explicit triple with nested reified annotation',
+      shouldParse('<a> <b> <c> {| <d> <e> {| <f> <g> |} |} .',
+          ['a', 'b', 'c'],
+          [['a', 'b', 'c'], 'd', 'e'],
+          [[['a', 'b', 'c'], 'd', 'e'], 'f', 'g']));
+
     const q = ['http://example.com/ns#s', 'http://example.com/ns#p',
       ['http://example.com/ns#a', 'http://example.com/ns#b', 'http://example.com/ns#c']];