Package org.antlr.v4.runtime

Examples of org.antlr.v4.runtime.TokenStreamRewriter.insertBefore()

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                       "C : 'c';\n");
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream("abc"));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "0");
    String result = tokens.getText();
    String expecting = "0abc";
    assertEquals(expecting, result);
  }
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    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.insertAfter(1, "x");
    String result = tokens.getText();
    String expecting = "axbxc";
    assertEquals(expecting, result);
  }
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    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "_");
    tokens.replace(1, "x");
    tokens.replace(1, "y");
    String result = tokens.getText();
    String expecting = "_ayc";
    assertEquals(expecting, result);
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    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.replace(0, 2, "x");
    tokens.insertBefore(1, "0");
    Exception exc = null;
    try {
      tokens.getText();
    }
    catch (IllegalArgumentException iae) {
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    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "0");
    tokens.replace(0, "x");
    stream.fill();
// supercedes insert at 0
    String result = tokens.getText();
    String expecting = "0xbc";
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    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.insertBefore(1, "y");
    String result = tokens.getText();
    String expecting = "ayxbc";
    assertEquals(expecting, result);
  }
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    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.insertBefore(1, "y");
    String result = tokens.getText();
    String expecting = "ayxbc";
    assertEquals(expecting, result);
  }
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    String input = "abc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "x");
    tokens.insertBefore(0, "y");
    tokens.replace(0, "z");
    String result = tokens.getText();
    String expecting = "yxzbc";
    assertEquals(expecting, result);
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    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(0, "x");
    tokens.insertBefore(0, "y");
    tokens.replace(0, "z");
    String result = tokens.getText();
    String expecting = "yxzbc";
    assertEquals(expecting, result);
  }
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    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.replace(2, "x");
    tokens.insertBefore(2, "y");
    String result = tokens.getText();
    String expecting = "abyx";
    assertEquals(expecting, result);
  }
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