refactoring

Author: raydac

src/main/java/com/igormaznitsa/prologparser/terms/PrologStruct.java

@@ -162,6 +162,7 @@ public boolean isBlock() {
     return this.functor == Op.VIRTUAL_OPERATOR_BLOCK;
   }
 
+  @Override
   public List<PrologTerm> flatComma(final List<PrologTerm> list) {
     if (this.functor == Op.METAOPERATOR_COMMA) {
       for (final PrologTerm t : this.elements) {

src/test/java/com/igormaznitsa/prologparser/IntegrationTest.java

@@ -1044,6 +1044,15 @@ public void testUnexpectedlyEndedReadStream() throws Exception {
     assertTrue(completedClauseCounter.get() < Math.round(0.1 * ATTEMPTS));
   }
 
+  @Test
+  public void testNonLatinChars() {
+    assertEquals("Ы is П + Ш", parseEd("Ы is П + Ш.").next().toString());
+    assertEquals("Привет123", parseEd("Привет123.").next().toString());
+    assertThrows(PrologParserException.class, () -> parseEd("Привет123(a).").next().toString());
+    assertEquals("привет123", parseEd("привет123.").next().toString());
+    assertEquals("привет", parseEd("привет.").next().toString());
+  }
+
   @Test
   public void testVarAsFunctor() {
     assertThrows(PrologParserException.class, () -> new GenericPrologParser(new StringReader("X(a)."), DefaultParserContext.of(FLAG_NONE)).next());