[mkgmap-dev] Failure to understand apply logic in relations - or failure in the logic

Thu Nov 25 17:07:04 GMT 2021

Ah sorry - I missed the entry about that point in the style manual.... Now
I understand it.

On Thu, 25 Nov 2021 at 18:00, Felix Hartmann <extremecarver at gmail.com>
wrote:

> Oh sorry - no my mistake was different - I used the wrong brackets.
> However I could not find anywhere where this is documented.
> working:
> set route_name_hiking1 = '$*(route_name_hiking1)* + ${name|not-contained:
> + :route_name_hiking1}' | 'IWN ${name}' | *'$(route_name_hiking1)*' |
> 'IWN'
>
> not working:
> set route_name_hiking1 = '$*{route_name_hiking1}* + ${name|not-contained:
> + :route_name_hiking1}' | 'IWN ${name}' | *'${route_name_hiking1}*' |
> 'IWN'
>
> Why do we have to use standard brackets when referencing a value inside
> the apply action? Usually for referencing a value we need to use curly {}
> brackets...
>
> On Thu, 25 Nov 2021 at 16:17, Felix Hartmann <extremecarver at gmail.com>
> wrote:
>
>> I think there is a bug in mkgmap.
>>
>> This line works as intended:
>> set route_name_hiking1 = '${route_name_hiking1} + ${name|not-contained: +
>> :route_name_hiking1}' | 'IWN ${name}' | '${route_name_hiking1}' | 'IWN'
>> while this line in the relations file fails to work as expected - the
>> part after the + is not added - or at least not visible (strangely the map
>> size is pretty similar).
>> set route_name_hiking1 = '${route_name_hiking1} + ${name}' | 'IWN
>> ${name}' | '${route_name_hiking1}' | 'IWN'
>>
>>
>> So only by including the not-contained filter ithe relations file is
>> actually adding the names of the routes after each other - while they are
>> not added without such a filter.
>>
>> On Wed, 24 Nov 2021 at 10:45, Felix Hartmann <extremecarver at gmail.com>
>> wrote:
>>
>>> I will try your example to see where it goes wrong. Apply_once is about
>>> forward and backward relations. It should not matter:
>>> https://www.mkgmap.org.uk/pipermail/mkgmap-dev/2010q1/006268.html
>>>
>>> On Tue, 23 Nov 2021, 19:32 Mike Baggaley <mike at tvage.co.uk> wrote:
>>>
>>>> Hi Felix,
>>>>
>>>>
>>>>
>>>> This is what I have in my relations file for routes:
>>>>
>>>>
>>>>
>>>> type=route & state!=proposed & route~'.*bicycle.*' & network~'.*ncn.*'
>>>> & ref~'\d*' { apply_once { set nationalbicycleroute=yes; set rn='$(rn)
>>>> & ${ref|not-contained: & :rn}' | '$(rn)' | '${ref}'; set nrn='$(nrn) &
>>>> ${ref|not-contained: & :nrn}' | '$(nrn)' | '${ref}'; } }
>>>>
>>>> type=route & state!=proposed & route~'.*bicycle.*' & network~'.*rcn.*'
>>>> & ref~'\d*' { apply_once { set regionalbicycleroute=yes; set rn='$(rn)
>>>> & ${ref|not-contained: & :rn}' | '$(rn)' | '${ref}'; } }
>>>>
>>>> type=route & state!=proposed & (route~'.*foot.*' | route~'.*hiking.*')
>>>> & network~'.*[nr]wn.*' & name~".*\(.*\)" { set name='${name|subst
>>>> :"\(.*\)~>"}'}
>>>>
>>>> type=route & state!=proposed & (route~'.*foot.*' | route~'.*hiking.*')
>>>> & network~'.*nwn.*' & name=* { apply_once { set nationalhikingroute=yes;
>>>> set rn='$(rn) & ${name|not-contained: & :rn}' | '$(rn)' | '${name}';
>>>> set nrn='$(nrn) & ${name|not-contained: & :nrn}' | '$(nrn)' |
>>>> '${name}'; set nwrn='$(nwrn) & ${name|not-contained: & :nwrn}' | '$(
>>>> nwrn)' | '${name}'; } }
>>>>
>>>> type=route & state!=proposed & (route~'.*foot.*' | route~'.*hiking.*')
>>>> & network~'.*rwn.*' & name=* { apply_once { set regionalhikingroute=yes;
>>>> set rn='$(rn) & ${name|not-contained: & :rn}' | '$(rn)' | '${name}'; }
>>>> }
>>>>
>>>>
>>>>
>>>> The most significant difference is that I have apply_once rather than
>>>> apply.
>>>>
>>>>
>>>>
>>>> Hope this helps,
>>>>
>>>> Mike
>>>>
>>>>
>>>>
>>>> *From:* Felix Hartmann [mailto:extremecarver at gmail.com]
>>>> *Sent:* 23 November 2021 13:31
>>>> *To:* Development list for mkgmap <mkgmap-dev at lists.mkgmap.org.uk>
>>>> *Subject:* [mkgmap-dev] Failure to understand apply logic in relations
>>>> - or failure in the logic
>>>>
>>>>
>>>>
>>>> route=hiking { apply { set route=hiking; set route_name =
>>>> '${route_name} & ${name}' | '${name}'; add route_ref = '${ref}'; } }
>>>>
>>>>
>>>>
>>>> I would expect that this rule if several relations are matching one
>>>> line, adds all names of route=hiking relations to the route_name variable
>>>> separated by "&". However it is only adding the first found.
>>>>
>>>>
>>>>
>>>> Where is my mistake?
>>>>
>>>>
>>>>
>>>> --
>>>>
>>>> Felix Hartman - Openmtbmap.org & VeloMap.org
>>>>
>>>>
>>>>
>>>
>>
>> --
>> Felix Hartman - Openmtbmap.org & VeloMap.org
>>
>>
>
> --
> Felix Hartman - Openmtbmap.org & VeloMap.org
>
>

-- 
Felix Hartman - Openmtbmap.org & VeloMap.org
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