Re: Using Bison and Delphi

"VBDis" <vbdis@aol.com> wrote:
> "Mike Hahn" <mikehahn@rogers.com> schreibt:
>
> >= foo (bar func1 (arg1, arg2,... ) func2 (arg1, arg2,... ));
>
> Okay, with such a syntax the dot operators may be omitted. But without the
> comma-separated argument lists (as in the original posting) it would be
almost
> impossible. Remember:
>
> >foo mymethod (arg1 arg2... );
>
> Did you also consider how to access class fields instead of class methods,
> methods without parameters, and the handling of an (implied?) Self/this
object
> reference?


I admit that my language might be hard to parse. If an open
parenthesis followed by an object name is encountered, you don't know
until reaching the close parenthesis what you're dealing with. One
possible solution to that problem is using a colon (:) operator for
method calls and a dollar-sign ($) operator for array references, and
no operator for variable references.


(: foo p1 (x1 x2) p2 x3 myfunc (x4 x5))
($ foo p1 (x1 x2) p2 x3 myarray (x4 x5))
(foo p1 (x1 x2) p2 x3 myvariable)


In the first expression, the p1 function returns an object with a p2
method, which returns an object with a myfunc method, returning the
value of the expression.


As for referencing methods/properties of the current class, you don't
need the object name at the front. Also I can use the "self" keyword
like Java does. Does that make any sense? I am a newbie when it comes
to writing compilers.


Mike Hahn
http://parenscript.sf.net

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