On 2019-01-18 09:01, David Bovill via use-livecode wrote:
I would love to be able to change the characters that merge uses -
especially from “[[..]]” to “{{...}}”.
Quite a lot of templating uses curly brackets - and I especially want
to
use it for wiki style templates which can’t use square brackets as they
are
used for internal links.
Not sure of the most elegant syntax, but we could add some Paramus
without
breaking anything.
The current string scanning which the merge function relies on 5
codeunits (not characters!):
- expression start ('[')
- expression finish (']')
- script start ('<')
- script finish ('>')
- script marker ('?')
With constraints:
- expression start != expression end
- script start != script finish != script marker
- expression start != script start
- expression finish != script finish
So the easiest / simplest least-likelihood-of-breaking-anything approach
would be to add an optional parameterization to the merge function
consisting of a string between 2 and 5 codeunits:
- string of 2 codeunits: change expression start / finish, leave
script markers the same
- string of 3 codeunits: change script start / finish / marker, leave
expression markers the same
- string of 4 codeunits: change expression start / finish and script
start / finish, leave script marker the same
- string of 5 codeunits: change all characters
In all cases it would need to be an error if the above constraints don't
hold.
For example...
To get David's wiki-safe option you'd just parameterize by "{}".
Similarly, merge is not completely XML safe - <?xml version="1.0"> is a
valid XML directive *and* a value LCS command call (xml version = "1.0")
- so to make that better you could parameterize by "<>|" (<| not being a
valid sequence except in CDATA, which you can elect not to use by entity
escaping chars instead).
Warmest Regards,
Mark.
--
Mark Waddingham ~ m...@livecode.com ~ http://www.livecode.com/
LiveCode: Everyone can create apps
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