Examples with CharStream org.antlr.v4.runtime.CharStream used on opensource projects

Example 56 with CharStream

use of org.antlr.v4.runtime.CharStream in project antlr4 by tunnelvisionlabs.

the class TestUnbufferedCharStream method testGetTextBeforeBufferStart.

@Test(expected = UnsupportedOperationException.class)
public void testGetTextBeforeBufferStart() {
    CharStream input = createStream("xyz");
    input.consume();
    int m1 = input.mark();
    assertEquals(1, input.index());
    input.getText(new Interval(0, 1));
}

Example 57 with CharStream

use of org.antlr.v4.runtime.CharStream in project antlr4 by tunnelvisionlabs.

the class TestUnbufferedCharStream method testNoChar.

@Test
public void testNoChar() throws Exception {
    CharStream input = createStream("");
    assertEquals(IntStream.EOF, input.LA(1));
    assertEquals(IntStream.EOF, input.LA(2));
}

Example 58 with CharStream

use of org.antlr.v4.runtime.CharStream in project antlr4 by tunnelvisionlabs.

the class TestUnbufferedCharStream method testBufferWrapSize1.

@Test
public void testBufferWrapSize1() throws Exception {
    CharStream input = createStream("01234", 1);
    assertEquals('0', input.LA(1));
    input.consume();
    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));
}

Example 59 with CharStream

use of org.antlr.v4.runtime.CharStream in project antlr4 by tunnelvisionlabs.

the class TestUnbufferedCharStream method testMarkReleaseOutOfOrder.

/**
 * The {@link IntStream} interface does not specify the behavior when marks
 * are not released in the reversed order they were created, but
 * {@link UnbufferedCharStream} handles this case by throwing an
 * {@link IllegalStateException}.
 */
@Test(expected = IllegalStateException.class)
public void testMarkReleaseOutOfOrder() {
    CharStream input = createStream("");
    int m1 = input.mark();
    int m2 = input.mark();
    input.release(m1);
}

Example 60 with CharStream

use of org.antlr.v4.runtime.CharStream in project antlr4 by tunnelvisionlabs.

the class TestUnbufferedCharStream method test2CharAhead.

@Test
public void test2CharAhead() throws Exception {
    CharStream input = createStream("xy");
    assertEquals('x', input.LA(1));
    assertEquals('y', input.LA(2));
    assertEquals(IntStream.EOF, input.LA(3));
}