Re: LPEG output

[Roberto Ierusalimschy <roberto@...>]

> A couple of questions:
> - the white paper says that a 'commit' pops the first element off the
> stack, which it states must be a 'choice' stack element. However, if
> there was a 'call' instruction in between, the 'choice' and the
> 'commit' or 'fail' instructions, there will be another type of element
> on the stack.

There cannot be a 'call' instruction in between. A commit is always in
the same rule that generated the corresponding choice; so, any call
between a choice and its corresponding commit must have returned.


> - what does the 'closeruntime' instruction do?

It closes a runtime capture, which involves calling the corresponding
Lua function. (This is by far the most complex instruction.)

-- Roberto