Re: [aspectj-users] Pointcut general form

[Wes Isberg <wes@xxxxxxxxxxxxxx>]

Hi James -

Good eye!

The definitions for MethodPat, et al. are at the end of that 
section on the second page, where, e.g., MethodPat is:

   [ModifiersPat] TypePat [TypePat . ] IdPat ( TypePat , … ) 
       [ throws ThrowsPat ]

As for 
  execution(* *.*(..))

Thank you for pointing out an omission in the quick 
reference.  Here:

  MethodPat :     *         *    .   *   (    ..    )
  MethodPat : {TypePat} {TypePat}.{IdPat}({TypePat?})

We forgot to specify that (..) in method or constructor 
patterns means the same as it does in the args(..) pattern: 
any number of arguments.

The best source for grammar and usage is the programming 
guide. There's a quick reference appendix and a semantics guide
which discusses things like args(..).  However, we don't 
publish a grammar in BNF form; the parser is a bit more 
careful, e.g., to avoid keywords.  

Wes


James Howe wrote:
> 
> I'm trying to get a better understanding of the various ways that pointcuts
> can be defined, particularly when using wildcards.  I was looking at the
> Quick Reference PDF and noticed that the definition of the general form for
> pointcuts seems to be incomplete (or I'm overlooking something).  In the
> section called "Primitive Pointcuts" in the general form section, the
> following grammar is given (I'm substituting <> for italicized informatino)
> :
> 
> execution(<MethodPat>)
> 
> where
> 
> <MethodPat>: [<ModifiersPat>] <TypePat> [<TypePat> .] <IdPat>(<TypePat> ,
> ... ) [ throws <ThrowsPat> ]
> <TypePat> :  ... type pattern definition
> 
> However, I can't find a definition for <MethodPat>, <IdPat> or <ThrowsPat>
> 
> I'm also not convinced that the grammar given is accurate.  For example,
> I've seen definitions which look like this:
> 
> execution(* *.*(..))
> 
> but I can't seem to construct that definition from the given grammar
> although perhaps what is missing is the definition of IdPat.
> 
> Is there a better document which describes the grammar used to parse
> pointcut definitions?
> 
> Thanks.
> 
> --
> James Howe
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