On Jun 11, 2004, at 23:13, Andy Lutomirski wrote:
I like the idea of having some kernel support for tokens.
But why PAGs? I imagine tokens as being independent objects without
any hierarchy. A token group is a set of tokens. The operations on tokens
are:
[...snip...]
If you really need a hierarchy, then you could allow token groups to contain
other token groups, with the rule that the whole thing must be acyclic.
I think my vocabulary here is confusing, what you refer to as a token group, I refer to as a PAG. The idea for the hierarchy is that it is frequently desirable to start a sub-shell with a temporarily different set of tokens, or to mask out only a certain token without modifying the rest.