René Scharfe <rene.scharfe@xxxxxxxxxxxxxx> writes:
> Junio C Hamano schrieb:
>> I mentioned an idea to enhance the pretty=format language with a
>> string function syntax that people can extend by adding new functions
>> in one of the "What's cooking" messages earlier. The general syntax
>> would be like
>>
>> %[function(args...)any string here%]
>>
>> where "any string here" part would have the usual pretty=format
>> strings. E.g. git show -s --format='%{w(72,8,4)%s%+b%]' should give
>> you a line wrapped commit log message if w(width,in1,in2) is such a
>> function.
>
> I pondered line wrapping with format strings briefly a long time ago, and
> I always considered it to be more similar to a colour, i.e. a state that
> one can change and that is applied to all following text until the next
> state change. (Except that it's always reset at the end of the format
> string.) The example above would then turn into '%w(72,8,4)%s%+b'.
As a syntax to express "wrapping" behaviour alone, I think this is much
simpler and more superiour. I guess with this if you want to wrap
something to 72 columns and then wrap something else to 66 columns, you
would write '%w(72,8,4)something%w(66,8,4)something else', right?
I used %] only for two reasons.
- Without an explicit "here it ends", I couldn't come up with a good way
to express '%[w(72,8,4)something%]something else'. IOW, how I can say
"wrap something to 72 columns and then place something else without any
wrapping"?
- When we need to support more than one string function like this, it is
unclear what '%f()one string%g()another one' in your syntax means.
Does it mean '%[f()one string%]%[g()another one%]' (i.e. concatenate
the result of applying string function f to 'one string' and the result
of applying string function g to 'another one')? Or does it mean
'%[f()one string%[g()another one%]%]' (apply 'f' to concatenation of
'one string' and the result of applying 'g' to 'another one')?
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