Package org.antlr.v4.runtime

Examples of org.antlr.v4.runtime.CharStream.consume()

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        assertEquals('1', input.LA(1));
        input.consume();
        assertEquals('2', input.LA(1));
        input.consume();
        assertEquals('3', input.LA(1));
        input.consume();
        assertEquals('4', input.LA(1));
        input.consume();
       assertEquals(IntStream.EOF, input.LA(1));
     }
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        assertEquals('2', input.LA(1));
        input.consume();
        assertEquals('3', input.LA(1));
        input.consume();
        assertEquals('4', input.LA(1));
        input.consume();
       assertEquals(IntStream.EOF, input.LA(1));
     }

  @Test public void test1Mark() throws Exception {
    TestingUnbufferedCharStream input = createStream("xyz");
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      };

        CommonTokenStream tokens = new CommonTokenStream(lexer);

        assertEquals("x", tokens.LT(1).getText()); // must skip first off channel token
        tokens.consume();
        assertEquals("=", tokens.LT(1).getText());
        assertEquals("x", tokens.LT(-1).getText());

        tokens.consume();
        assertEquals("34", tokens.LT(1).getText());
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        assertEquals("x", tokens.LT(1).getText()); // must skip first off channel token
        tokens.consume();
        assertEquals("=", tokens.LT(1).getText());
        assertEquals("x", tokens.LT(-1).getText());

        tokens.consume();
        assertEquals("34", tokens.LT(1).getText());
        assertEquals("=", tokens.LT(-1).getText());

        tokens.consume();
        assertEquals(";", tokens.LT(1).getText());
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        tokens.consume();
        assertEquals("34", tokens.LT(1).getText());
        assertEquals("=", tokens.LT(-1).getText());

        tokens.consume();
        assertEquals(";", tokens.LT(1).getText());
        assertEquals("34", tokens.LT(-1).getText());

        tokens.consume();
        assertEquals(Token.EOF, tokens.LA(1));
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        tokens.consume();
        assertEquals(";", tokens.LT(1).getText());
        assertEquals("34", tokens.LT(-1).getText());

        tokens.consume();
        assertEquals(Token.EOF, tokens.LA(1));
        assertEquals(";", tokens.LT(-1).getText());

        assertEquals("34", tokens.LT(-2).getText());
        assertEquals("=", tokens.LT(-3).getText());
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    tokens.fill();

    assertEquals(Token.EOF, tokens.LA(1));
    assertEquals(0, tokens.index());
    assertEquals(1, tokens.size());
    tokens.consume();
  }
}
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        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        Token t = tokens.LT(1);
        while ( t.getType()!=Token.EOF ) {
            tokens.consume();
            t = tokens.LT(1);
        }

        String result = tokens.getText();
        String expecting = "x = 3 * 0 + 2 * 0;";
 
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        // Input:  x = 3 * 0 + 2 * 0;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        tokens.consume(); // get x into buffer
        Token t = tokens.LT(-1);
        assertEquals("x", t.getText());

        tokens.consume();
        tokens.consume(); // consume '='
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        tokens.consume(); // get x into buffer
        Token t = tokens.LT(-1);
        assertEquals("x", t.getText());

        tokens.consume();
        tokens.consume(); // consume '='
        t = tokens.LT(-3);
        assertEquals("x", t.getText());
        t = tokens.LT(-2);
        assertEquals(" ", t.getText());
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