[mkgmap-dev] Strict ordering of action in a style rule file.

Fri Sep 18 14:24:14 BST 2009

Steve Ratcliffe wrote:
> Hi
>
> I have now made the change to introduce strict ordering to the
> action in a style rule file.
>
> Previously the actions where not triggered in any particular order and
> they were all run before any matching took place.  In the new code,
> the actions are run strictly in the order that they occur in the file.
> Actions only affect matching of rules later in the file, never
> rules earlier.
>
> So for example if you have an element with highway=primary then the
> following set of rules will result in 0x2 and not 0x1 which would be
> the case currently.
>
> highway=primary {set marker=1}
> marker=2 [0x1]
> highway=primary {set marker=2}
> marker=2 [0x2]
>
> I've not looked at the performance and have one thing to do to
> possibly improve it, but the functionality is working as far
> as I can tell with some simple test.
>
> For everyone with complex rules, could you please give it a go.
> It is on the style branch in subversion, or you can download
> one I prepared earlier here:
>
> 	http://www.mkgmap.org.uk/snapshots/mkgmap-style.jar
>
> If you see any case where the rules and actions do not appear to run
> in the order that they appear in the file is a bug and should be
> reported.
>
> ..Steve
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>   
Is the style branch otherwise identical to normal branch or lagging behind?