LPeg grammars and metatables

[Peter Odding <xolox@...>]

I've been working on a lexer framework based on LPeg and noticed that lpeg.P() 
does not accept grammars with open references to patterns defined in another 
grammar shadowed by the current grammar with __index. Has support for __index in 
grammars been considered for a future version of LPeg? That would allow grammars 
to inherit one another via Lua's metatables...

Thanks in advance,

 - Peter Odding