7 Jun
2011
7 Jun
'11
2:04 p.m.
No, that is exactly what I did and it does not work. The number of instance variables
takes the super classes into account. I splitted it into two classes: One having 89 and
the second having 163 instance variables. The sum is 252. If you take one instVar from
PPParser and one from PPDelegatingParser that makes a total of 254. And that is the number
I get if I do
MyParser instSize
while
MyParser instVarNames size = 163
The java parser has only 195 instance variables so no problem. So either I did something
completely wrong or I need a new strategy.
Norbert
Am 07.06.2011 um 12:35 schrieb Tudor Girba:
Hi,
Alberto encountered this when he worked on the Java parser. The solution is to split the
parser into multiple classes that inherit from each other.
For example, in the mentioned example we have:
PPJavaLexicon
PPJavaSyntax
PPJavaParser
Cheers,
Doru
On 7 Jun 2011, at 12:02, Norbert Hartl wrote:
I learned something today. While talking about
the maximum number of instance variabes I always thought it is a limit per class. But now
I know it is a limit on an object. As I reached 230 instance variables I started to split
the parser into two. But now I reached the limit and cannot add instance variables.
I need some ideas about how to structure the parser. I think it will be too hard to find
parts of the grammar that are distinct so it would be possible to separate them into
different classes. Another way would be to access some of the parser via method calls
instead of accessing the instVar parsers.
So does anybody has some experience in how to structure parsers?
thanks,
Norbert
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