Commit 7acb08d8 authored by Tomek Mrugalski's avatar Tomek Mrugalski 🛰

[5014] dhcp6.dox cleanup

parent 09aa7a35
......@@ -97,23 +97,25 @@ To solve those issues a two phase approach was proposed:
PHASE 1: replace isc::data::fromJSON with bison-based parser. This will allow
to have a single file that defines the actual syntax, much better syntax
checking, and provide more flexibility, like various comment types and
file inclusions. As a result, the parser still returns JSON structures,
but those are guaranteed to be correct from the grammar perspective.
file inclusions. As a result, the parser still returns JSON structures that
are guaranteed to be correct from the grammar perspective. Sticking with
the JSON structures also allows us to continue using existing parsers.
Furthermore, it is possible to implement default values at this level
as simply inserting extra JSON structures in places that are necessary.
PHASE 2: simplify existing parsers by getting rid of the build/commit split.
Get rid of the inheritance contexts. Essentially the parser should
take JSON structure as a parameter and return the configuration structure
take JSON structure as a parameter and return the configuration structure.
For example, for options this should essentially look like this:
@code
CfgOptionPtr parse(ConstElementPtr options)
@endcode
The whole complexity behind inheriting parsers should be removed
and implemented in the parser. It should return extra JSON elements.
The details are TBD, but there is one example for setting up an
renew-timer value on the subnet level that is ihnerited from the
global ("Dhcp6") level. This phase is still a bit loosely defined.
The whole complexity behind inheriting contexts should be removed
from the existing parsers and implemented in the bison parser.
It should return extra JSON elements. The details are TBD, but there is
one example for setting up an renew-timer value on the subnet level that
is ihnerited from the global ("Dhcp6") level. This phase is still a bit
loosely defined.
There is now a fully working prototype for phase 1. It introduces bison
based parser. It is essentially defined in two files: dhcp6_lexer.ll,
......
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