Tom Parker at 01:21, 26 March 2014

2014-03-26T01:21:49Z

Tom Parker: Created page with '{| align="right" | TOC |} ==Background== From a code team discussion about tasks for PCGen 5.17, it was brought up that one project was additional work on formula proce...'

2009-04-30T20:47:14Z

Created page with '{| align="right" | __TOC__ |} ==Background== From a code team discussion about tasks for PCGen 5.17, it was brought up that one project was additional work on formula proce...'

New page

{| align="right"
| __TOC__
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==Background==

From a code team discussion about tasks for PCGen 5.17, it was brought up that one project was additional work on formula processing, JEP, output sheets. This discussion effectively starts in message [http://tech.groups.yahoo.com/group/pcgen_developers/message/2 DEV_2]. This discussion led to considering the removal of JEP from PCGen.

==Status==

This is a proposal. It is not finalized, and is actively undergoing discussion. Please comment to the pcgen_developers list on this issue/proposal.

This Wiki is a summary page, it is NOT intended to host the discussion - please do not use it to carry on discussion.

==Reasoning==

The long-term discussion/proposal is around removing JEP from PCGen. This is a result of
# JEP is now a closed source library, so we cannot continue to benefit from future releases/bug fixes
# JEP is a license exception in our code, which restricts our license flexibility
# JEP has more features than we need (some of which get in our way)

==Requirements==

The following are the currently identified (proposed) requirements for a Formula Parser for PCGen:

# Recognize the bits that make up a PCGEN formula
# Follow mathematical precedence for operators
# Do not involve tens (hundreds) of recursive calls every time we evaluate a formula.
# Have the ability to complain at LST load (vs at runtime) if a formula is invalid, which means it also has the ability to detect and warn at LST load for deprecated formula styles, e.g. 2MAXINT

Potential Implementation Details/Future projects:
# Have a formula factory that can detect situations where a formula like 1+INT is used multiple places in the LST. These should be reduced via a cache to a single Formula object (since a Formula is immutable) to save memory and hopefully reduce LST load time.
# Make formula terms/variables into plugins, so the Formula system can be extended without modifying the core.

==Proposal==

Being developed, please see pcgen_developers list for current status.

@@ Line 9: / Line 9: @@
 ==Status==
-This is a proposal.  It is not finalized, and is actively undergoing discussion.  Please comment to the pcgen_developers list on this issue/proposal.
+This Wiki is a summary page, it is NOT intended to host the discussion - please do not use it to carry on discussion.
-This Wiki is a summary page, it is NOT intended to host the discussion - please do not use it to carry on discussion.
+A detailed proposal (please don't discuss on this page EITHER) is on [[Formula Parser Equip Vars Proposal]]
 ==Reasoning==

Formula Parser-JEP removal - Revision history

Tom Parker at 01:21, 26 March 2014

Tom Parker: Created page with '{| align="right" | __TOC__ |} ==Background== From a code team discussion about tasks for PCGen 5.17, it was brought up that one project was additional work on formula proce...'

Tom Parker: Created page with '{| align="right" | TOC |} ==Background== From a code team discussion about tasks for PCGen 5.17, it was brought up that one project was additional work on formula proce...'