[PATCH 5 of 7] [RFC] parsers: create a dedicated type for an obs marker

[Yuya Nishihara]

On Mon, 13 Mar 2017 22:15:47 -0700, Gregory Szorc wrote:
> # HG changeset patch
> # User Gregory Szorc <gregory.szorc at gmail.com>
> # Date 1489467734 25200
> #      Mon Mar 13 22:02:14 2017 -0700
> # Node ID b4159d4c3683f03b6962991f318b080d849d6ba3
> # Parent  d600bd4edd62b3ee74730f1282e53b9d596bbaec
> [RFC] parsers: create a dedicated type for an obs marker

I haven't reviewed these carefully, but I like the direction. fm1readmarkers()
creates a bunch of boxed objects, which would have somewhat significant cost.

Can we split obsmarker handling to new module? It's getting bigger.