[boost] Spirit parser_id question

From: fred_at_[hidden]
Date: 2003-12-02 17:09:32

In the Spirit library, it is possible to assign a separate parser_id to
a rule as one of the template parameters for the rule. This rule can
then be extracted from, for example, AST trees to determine which rule
created a match. In theory, this is great, since it allows some
decoupling between the rule definitions and the AST tree interpretation.
However, if you create two rules A and B with different parser IDs (say
1 and 2), and then you call A = B, then both A and B will have an ID of
2. 

 

I assume this is a bug. Is it a known bug? If so, what is the fix? 

 

If it's not a bug, then what the heck is the point of it, and how does
one work around it?

 

Thanks!

 

-Fred