[antlr-interest] BUG (JAVA): Generics not permitted in Antlr rule parameter lists

[Austin Hastings]

Note that this doesn't purport to work - I just jammed some text in to 
reproduce the behavior.

testSuite[List<GunitTest> tests]
    : rule1=ID ('walks' rule2=ID)? ':'
      {
        String        method1 = $rule1.text;

        if (isLexerMethod(method1) && method1.charAt(0) != 'm')
        {
            method1 = 'm' + method1;
        }

        String        method2 = (rule2 != null) ? $rule2.text : null;
      }
      (tc=testCase[method1, method2, $tests]
        {
            if ($tc.test != null)
            {
                $tests.add($tc.test);
            }
        }
      )+
      ';'
    ;

testCase[String m1, String m2, List<GunitTest> tests] returns [GunitTest 
test]
    : input '->' outputExpr
      {
        $test = newTestCase(m1, m2, $input.test_input, $outputExpr.expect);
      }
    ;


compile:
   [antlr3] ANTLR Parser Generator  Version 3.0.1 (August 13, 2007)  
1989-2007
   [antlr3] warning(200): 
/home/austin/gunit/sources/org/antlr/gunit/TestSuite.g:433:16: Decision 
can match input such as "'(' QUOTED_LITERAL ')'" using multiple 
alternatives: 1, 2
   [antlr3] As a result, alternative(s) 2 were disabled for that input
    [javac] Compiling 2 source files to /home/austin/gunit/classes
    [javac] /home/austin/gunit/sources/org/antlr/gunit/TestSuiteLexer.java
    [javac] /home/austin/gunit/sources/org/antlr/gunit/TestSuiteParser.java
    [javac] 
/home/austin/gunit/sources/org/antlr/gunit/TestSuiteParser.java:710: 
illegal start of expression
    [javac]                         tc=testCase(method1,  method2,  , 
tests);
    [javac]                                                         ^
    [javac] 1 error

=Austin


Gavin Lambert wrote:
> At 17:13 11/11/2007, Austin Hastings wrote:
> >In the Java target, the dreaded string-template failure occurs if a
> >rule has a parameter with generic type:
> >
> >testCase[String m1, String m2, List<TestCase> tests]
> >
> >produces a call like
> >
> >testCase(m1, m2,  , tests);
> >
> >and a build failure, etc.
>
> I tried replicating this in 3.0.1, but couldn't -- calls, 
> declarations, and return values involving generic types all seemed to 
> generate the correct code.
>
> Can you post a more specific repro example?  Or are you using an 
> earlier version?
>
>
>