nestable C/C++ XML parser?

Mike Williams mikew at
Wed Dec 8 09:37:41 GMT 1999

  >>> On Tue, 07 Dec 1999 13:57:43 -0500,
  >>> "Paul" == Paul Miller <stele at> wrote:

  Paul> No, I did want things pushed at me (via callbacks), but I want the
  Paul> opportunity to do some object-specific processing "inside" one of the
  Paul> callbacks, after the next set of *nested* elements were processed. This
  Paul> requires a nestable parser, where I can pick up the parsing inside a
  Paul> different scope. 

What about using nestable *handlers*.  Say you're parsing something like


When your main handler sees the <foo> tag, create a new "FooHandler"
object.  Your main handler would then need to delegate all events to the
FooHandler, until the corresponding </foo> is seen.

Not that this is particularly easy to implement.  In fact, I started to
implement something similar (in Java), but got fed up ... I've reverted to
using a DOM as input, for the time being.  

The main complication is that the delegating handler has to maintain a
context-stack while it's delegating, in order to match the correct
end-tag.  One way around this might be to get the FooHandler to notify the
main handler when it's finished.

Just an idea ...

Mike Williams

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