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.

    assertEquals(expecting, found);
  }


  @Test public void testRepeatsVisitWithContext() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B (A C B) B D D)");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, wiz.getTokenType("B"),
       new TreeWizard.ContextVisitor() {
         @Override
         public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {

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    assertEquals(expecting, found);
  }


  @Test public void testRepeatsVisitWithNullParentAndContext() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B (A C B) B D D)");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, wiz.getTokenType("A"),
       new TreeWizard.ContextVisitor() {
         @Override
         public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {

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    assertEquals(expecting, found);
  }


  @Test public void testVisitPattern() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A B) D)");
    final List<Object> elements = new ArrayList<Object>();
    wiz.visit(t, "(A B)",
             new TreeWizard.Visitor() {
              @Override
              public void visit(Object t) {

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    assertEquals(expecting, found);
  }


  @Test public void testVisitPatternMultiple() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A B) (D (A B)))");
    final List<String> elements = new ArrayList<String>();
    wiz.visit(t, "(A B)",
             new TreeWizard.ContextVisitor() {
               @Override
               public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {

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    assertEquals(expecting, found);
  }


  @Test public void testVisitPatternMultipleWithLabels() 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<String> elements = new ArrayList<String>();
    wiz.visit(t, "(%a:A %b:B)",
             new TreeWizard.ContextVisitor() {
               @Override
               public void visit(Object t, Object parent, int childIndex, Map<String, Object> labels) {

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    assertEquals(expecting, found);
  }


  @Test public void testParse() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C)");
    boolean valid = wiz.parse(t, "(A B C)");
    assertTrue(valid);
  }

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    assertTrue(valid);
  }


  @Test public void testParseSingleNode() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("A");
    boolean valid = wiz.parse(t, "A");
    assertTrue(valid);
  }

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    assertTrue(valid);
  }


  @Test public void testParseFlatTree() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(nil A B C)");
    boolean valid = wiz.parse(t, "(nil A B C)");
    assertTrue(valid);
  }

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    assertTrue(valid);
  }


  @Test public void testWildcard() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C)");
    boolean valid = wiz.parse(t, "(A . .)");
    assertTrue(valid);
  }

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    assertTrue(valid);
  }


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

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