Package org.antlr.v4.runtime

Examples of org.antlr.v4.runtime.LexerInterpreter

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        // Tokens: 012345678901234567
        // Input:  x = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = new UnbufferedTokenStream<Token>(lexEngine);

    assertEquals("x", tokens.LT(1).getText());
    assertEquals(" ", tokens.LT(2).getText());
    assertEquals("=", tokens.LT(3).getText());
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        // Tokens: 012345678901234567
        // Input:  x = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
    TestingUnbufferedTokenStream<Token> tokens = new TestingUnbufferedTokenStream<Token>(lexEngine);

    assertEquals("[[@0,0:0='x',<1>,1:0]]", tokens.getBuffer().toString());
    assertEquals("x", tokens.LT(1).getText());
    tokens.consume(); // move to WS
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        // Tokens: 012345678901234567
        // Input:  x = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
    TestingUnbufferedTokenStream<Token> tokens = new TestingUnbufferedTokenStream<Token>(lexEngine);

    int m = tokens.mark();
    assertEquals("[[@0,0:0='x',<1>,1:0]]", tokens.getBuffer().toString());
    assertEquals("x", tokens.LT(1).getText());
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        // Tokens: 012345678901234567
        // Input:  x = 302;
        CharStream input = new ANTLRInputStream(
      new StringReader("x = 302 + 1;")
    );
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
    TestingUnbufferedTokenStream<Token> tokens = new TestingUnbufferedTokenStream<Token>(lexEngine);

    int m = tokens.mark();
    assertEquals("[[@0,0:0='x',<1>,1:0]]", tokens.getBuffer().toString());
    assertEquals("x", tokens.LT(1).getText());
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            "MULT : '*';\n" +
            "WS : ' '+;\n");
        // Tokens: 012345678901234567
        // Input:  x = 3 * 0 + 2 * 0;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        String result = tokens.LT(1).getText();
        String expecting = "x";
        assertEquals(expecting, result);
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            "MULT : '*';\n" +
            "WS : ' '+;\n");
        // Tokens: 012345678901234567
        // Input:  x = 3 * 0 + 2 * 0;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        String result = tokens.LT(2).getText();
        String expecting = " ";
        assertEquals(expecting, result);
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            "MULT : '*';\n" +
            "WS : ' '+;\n");
        // Tokens: 012345678901234567
        // Input:  x = 3 * 0 + 2 * 0;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        int i = 1;
        Token t = tokens.LT(i);
        while ( t.getType()!=Token.EOF ) {
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            "MULT : '*';\n" +
            "WS : ' '+;\n");
        // Tokens: 012345678901234567
        // Input:  x = 3 * 0 + 2 * 0;
        CharStream input = new ANTLRInputStream("x = 3 * 0 + 2 * 0;");
        LexerInterpreter lexEngine = g.createLexerInterpreter(input);
        TokenStream tokens = createTokenStream(lexEngine);

        Token t = tokens.LT(1);
        while ( t.getType()!=Token.EOF ) {
            tokens.consume();
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            "MULT : '*';\n" +
            "WS : ' '+;\n");
        // Tokens: 012345678901234567
        // 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());
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      return implicitLexer.createLexerInterpreter(input);
    }

    char[] serializedAtn = ATNSerializer.getSerializedAsChars(atn);
    ATN deserialized = new ATNDeserializer().deserialize(serializedAtn);
    return new LexerInterpreter(fileName, getVocabulary(), Arrays.asList(getRuleNames()), ((LexerGrammar)this).modes.keySet(), deserialized, input);
  }
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Related Classes of org.antlr.v4.runtime.LexerInterpreter

  • org.antlr.runtime.ANTLRFileStream
  • org.antlr.runtime.ANTLRStringStream
  • org.antlr.runtime.CharStream
  • org.antlr.runtime.CommonToken
  • org.antlr.runtime.tree.CommonTree
  • org.antlr.runtime.tree.CommonTreeNodeStream
  • org.antlr.runtime.tree.Tree
  • org.antlr.runtime.tree.TreeVisitorAction
  • org.antlr.v4.analysis.LeftRecursionDetector
  • org.antlr.v4.analysis.LeftRecursiveRuleAltInfo
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