[mkgmap-dev] subst function and literal dots in regular expressions

Sun May 25 11:14:40 BST 2014

Hi, 

I am trying to normalise street names by removing any dots. So far I
have been unable to get the subst function to do what I want. The
problem seems to be getting the dot to be taken literally in the subst
parameters. 

I have tried: 

a) set newname='${name|subst:. +=> }' 

b) set newname='${name|subst:. +=> }' 

c) set newname='${name|subst:[.] +=> }' 

All of the above seem to have no effect, i.e. newname ends up the same
as name. 

I am thinking of doing it in two stages: firstly replacing ". " (dot
followed by space) with a space, and then replacing any other dots with
a space so "A.B. Street" ends up as "A B Street". I could also do it by
replacing any dots by spaces and then compressing multiple spaces. But
in both cases I need subst to match a literal dot. 

My current style rules look like this: 

highway=* & name ~ '.*[.].*' {set newname='${name|subst:. +=> }'}
newname=* {echo "dots changed from ${name} to ${newname} (1)"; set
name='${newname}'}
highway=* & name ~ '.*[.].*' {set newname='${name|subst:[.]=> }'}
newname=* {echo "dots changed from ${name} to ${newname} (2)"; set
name='${newname}'} 

Can anyone help please? 

Colin 

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