Package org.antlr.v4.runtime

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

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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(2, "y");
    tokens.insertBefore(0, "z");
    String result = tokens.getText();
    String expecting = "zaxbyc";
    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(2, "y");
    tokens.insertBefore(0, "z");
    String result = tokens.getText();
    String expecting = "zaxbyc";
    assertEquals(expecting, result);
  }
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    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.insertBefore(2, "y");
    tokens.insertBefore(0, "z");
    String result = tokens.getText();
    String expecting = "zaxbyc";
    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, "foo");
    tokens.replace(1, 2, "foo");
    stream.fill();
// kill prev insert
    String result = tokens.getText();
    String expecting = "afoofoo";
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    String input = "abcc";
    LexerInterpreter lexEngine = g.createLexerInterpreter(new ANTLRInputStream(input));
    CommonTokenStream stream = new CommonTokenStream(lexEngine);
    stream.fill();
    TokenStreamRewriter tokens = new TokenStreamRewriter(stream);
    tokens.insertBefore(1, "x");
    tokens.replace(2, 3, "foo");
    String result = tokens.getText();
    String expecting = "axbfoo";
    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, 3, "foo");
    tokens.insertBefore(1, "x");
    String result = tokens.getText();
    String expecting = "axbfoo";
    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(2, "y");
    tokens.delete(2);
    String result = tokens.getText();
    String expecting = "aby";
    assertEquals(expecting, result);
  }
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