[antlr-interest] API docs out of date
Terence Parr
parrt at cs.usfca.edu
Wed Oct 17 17:37:10 PDT 2007
Weird. added bug report:
http://www.antlr.org:8888/browse/ANTLR-183
Thanks!
Ter
On Oct 17, 2007, at 4:44 AM, Austin Hastings wrote:
> I'm trying to refactor some code in gunit, and I came across this
> issue:
>
> Testcase: testEmptyString took 0.006 sec
> FAILED
> expected:<1> but was:<0>
> junit.framework.AssertionFailedError: expected:<1> but was:<0>
> at org.antlr.gunit.StringTestInput_Test.testEmptyString
> (StringTestInput_Test.java:37)
>
>
>
> The test case is:
>
> @Test
> public void testEmptyString()
> {
> StringTestInput sti = new StringTestInput("");
> CharStream cs = sti.getStream();
>
> assertEquals(1, cs.size()); // This value includes a
> single EOF.
>
> int c = cs.LT(1);
> assertEquals(CharStream.EOF, c);
> }
>
> The assertion about cs.size() == 1 is failing (that's line 37).
>
> According to the CharStream API docs (http://www.antlr.org/api/Java/
> interfaceorg_1_1antlr_1_1runtime_1_1_int_stream.html#619c01eda0b090b1c
> e1877bd60378990),
> the size() function returns the size, and "This value includes a
> single EOF."
>
> I have interpreted that to mean that size() will return 1 for an
> empty stream, signifying that there is an EOF pending. Yet it
> returns 0. This is easy enough for me to fix, but I think it
> indicates that either the API is broke, or the docs are broke.
>
> =Austin
>
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