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Would it be possible to override lua_tolstring/lua_tostring such that
they could use a userdata function that returns a pointer+length into
an 'external' buffer that could be guaranteed to be unchanged for a
specific duration?  I'm thinking this would be particularly useful in
making my luaevent libary's event_buffer object consumable by various
libraries (lua's regex, lpeg, etc) w/o having to muck around w/
creating string instances that end up getting hashed/etc even if
parsing would end up using a small amt of the data or failing...

I vaguely recall something like this being discussed in the past, but
I can't find it.

(Plug: )
Thomas Harning Jr.