Examples of org.antlr.runtime.tree.CommonTree

org.antlr.runtime.tree.CommonTree
A tree node that is wrapper for a Token object. After 3.0 release while building tree rewrite stuff, it became clear that computing parent and child index is very difficult and cumbersome. Better to spend the space in every tree node. If you don't want these extra fields, it's easy to cut them out in your own BaseTree subclass.

    assertTrue(valid);
  }


  @Test public void testParseWithText2() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B[T__32] (C (D E[a])))");
    // C pattern has no text arg so despite [bar] in t, no need
    // to match text--check structure only.
    boolean valid = wiz.parse(t, "(A B[foo] C)");
    assertEquals("(A T__32 (C (D a)))", t.toStringTree());
  }

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    assertEquals("(A T__32 (C (D a)))", t.toStringTree());
  }


  @Test public void testParseWithTextFails() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C)");
    boolean valid = wiz.parse(t, "(A[foo] B C)");
    assertTrue(!valid); // fails
  }

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    assertTrue(!valid); // fails
  }


  @Test public void testParseLabels() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C)");
    Map<String, Object> labels = new HashMap<String, Object>();
    boolean valid = wiz.parse(t, "(%a:A %b:B %c:C)", labels);
    assertTrue(valid);
    assertEquals("A", labels.get("a").toString());
    assertEquals("B", labels.get("b").toString());

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    assertEquals("C", labels.get("c").toString());
  }


  @Test public void testParseWithWildcardLabels() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C)");
    Map<String, Object> labels = new HashMap<String, Object>();
    boolean valid = wiz.parse(t, "(A %b:. %c:.)", labels);
    assertTrue(valid);
    assertEquals("B", labels.get("b").toString());
    assertEquals("C", labels.get("c").toString());

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    assertEquals("C", labels.get("c").toString());
  }


  @Test public void testParseLabelsAndTestText() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B[foo] C)");
    Map<String, Object> labels = new HashMap<String, Object>();
    boolean valid = wiz.parse(t, "(%a:A %b:B[foo] %c:C)", labels);
    assertTrue(valid);
    assertEquals("A", labels.get("a").toString());
    assertEquals("foo", labels.get("b").toString());

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    assertEquals("C", labels.get("c").toString());
  }


  @Test public void testParseLabelsInNestedTree() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A (B C) (D E))");
    Map<String, Object> labels = new HashMap<String, Object>();
    boolean valid = wiz.parse(t, "(%a:A (%b:B %c:C) (%d:D %e:E) )", labels);
    assertTrue(valid);
    assertEquals("A", labels.get("a").toString());
    assertEquals("B", labels.get("b").toString());

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    assertEquals("E", labels.get("e").toString());
  }


  @Test public void testEquals() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t1 = (CommonTree)wiz.create("(A B C)");
    CommonTree t2 = (CommonTree)wiz.create("(A B C)");
    boolean same = TreeWizard.equals(t1, t2, adaptor);
    assertTrue(same);
  }

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    assertTrue(same);
  }


  @Test public void testEqualsWithText() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t1 = (CommonTree)wiz.create("(A B[foo] C)");
    CommonTree t2 = (CommonTree)wiz.create("(A B[foo] C)");
    boolean same = TreeWizard.equals(t1, t2, adaptor);
    assertTrue(same);
  }

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    assertTrue(same);
  }
  
  @Test public void testEqualsWithMismatchedText() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t1 = (CommonTree)wiz.create("(A B[foo] C)");
    CommonTree t2 = (CommonTree)wiz.create("(A B C)");
    boolean same = TreeWizard.equals(t1, t2, adaptor);
    assertTrue(!same);
  }

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    assertTrue(!same);
  }


  @Test public void testFindPattern() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A[foo] B[bar]) (D (A[big] B[dog])))");
    final List<? extends Object> subtrees = wiz.find(t, "(A B)");
    List<? extends Object> elements = subtrees;
    String found = elements.toString();
    String expecting = "[foo, big]";
    assertEquals(expecting, found);

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