Re: Error compiling with icu support / possible workaround?

[John MacFarlane <jgm-TVLZxgkOlNX2fBVCVOL8/A@public.gmane.org>]

Just a note: I've started working on a library that does this.

The basics are mostly working now (about 4x slower than text-icu but not
too bad).  But I haven't yet implemented the locale-sensitive
sorting hints.



jcr <ffi.appdev-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> writes:

> I'm not an expert in this, but I believe a pure Haskell solution mean 
> implementing the Unicode Collation Algorithm 
> <https://unicode.org/reports/tr10/>. The Unicode Common Locale Data 
> Repository <http://cldr.unicode.org/> contains the per-locale settings to 
> configure the algorithm to sort according to the locale's rules. This is 
> what ICU does.
>
> On Monday, March 22, 2021 at 6:56:04 AM UTC+1 John MacFarlane wrote:
>
>> "'Nick Bart' via pandoc-discuss"
>> <pandoc-...-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org> writes:
>>
>> > An unofficial fork of text-icu claims to have fixed the issue (
>> https://github.com/WorldSEnder/text-icu/commit/7657227a7ca8ad13be86db5c190b806774a5fd6b
>> ).
>> >
>> > I wonder if anyone could indicate how to tweak the pandoc install 
>> command to include, for the time being, the WorldSEnder/text-icu fork 
>> rather than the official one - or whether there is anything else I could 
>> try to fix this issue on the pandoc side. (I tried downgrading icu4c via 
>> homebrew, but apparenty no formulae for earlier versions are available.)
>>
>> Replace stack.yaml with this:
>>
>>
>> ``` stack.yaml
>> flags:
>> pandoc:
>> trypandoc: false
>> embed_data_files: true
>> QuickCheck:
>> old-random: false
>> citeproc:
>> icu: true
>> packages:
>> - '.'
>> extra-deps:
>> - hslua-1.3.0
>> - hslua-module-path-0.1.0
>> - jira-wiki-markup-1.3.4
>> - skylighting-core-0.10.5
>> - skylighting-0.10.5
>> - doclayout-0.3.0.2
>> - citeproc-0.3.0.9
>> - texmath-0.12.2
>> - random-1.2.0
>> - git: https://github.com/WorldSEnder/text-icu
>> commit: 7657227a7ca8ad13be86db5c190b806774a5fd6b
>> ghc-options:
>> "$locals": -fhide-source-paths -Wno-missing-home-modules
>> resolver: lts-17.5
>> nix:
>> packages: [zlib]
>> ```
>>
>> Then stack install.
>>
>> > As an aside, while I fully understand the wish not having to include a 
>> huge external C library by default, I feel that pandoc’s default sorting 
>> algorithm, currently based on “i;unicode-casemap” (RFC 5051), is somewhat 
>> below par. In particular, it does not even comply with mainstream 
>> English-language rules as far accented characters are concerned. The 
>> Chicago Manual of Style (17e, 2017, 16.67) unambiguously states: “Words 
>> beginning with or including accented letters are alphabetized as though 
>> they were unaccented.” One of their examples gives the sort order “Ubeda – 
>> Über – Ubina“. Without icu support, pandoc incorrectly sort this as “Ubeda 
>> – Ubina – Über“.
>>
>> Yes. I agree. Actually, if we just need special treatment for
>> English locales, then I don't think it should be too hard. We
>> can use the Haskell unicode-transforms library (already a
>> dependency of pandoc) to normalize the text and then remove
>> accents:
>>
>> Prelude Data.Text.Normalize Data.Text Data.Char> Data.Text.filter (not . 
>> isMark) $ normalize NFD "dérégler"
>> "deregler"
>>
>> We could sort on the result of that transform.
>>
>> (This method would also affect non-Western scripts, though, and
>> I don't know what the rules around those are...)
>>
>> For non-English locales, would we want to fall back to RFC 5051?
>>
>> I'm not sure what all the relevant rules are; if it's not too
>> terribly complicated, I wonder if a pure Haskell library could
>> be cooked up. It's a shame that there's no way to do proper
>> unicode collation in Haskell without the difficult icu4
>> dependency.
>>
>
> -- 
> You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
> To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/5035db2e-16b9-4923-8e38-d95b81d27840n%40googlegroups.com.

-- 
You received this message because you are subscribed to the Google Groups "pandoc-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pandoc-discuss+unsubscribe-/JYPxA39Uh5TLH3MbocFF+G/Ez6ZCGd0@public.gmane.org
To view this discussion on the web visit https://groups.google.com/d/msgid/pandoc-discuss/m2o8f9ofmw.fsf%40MacBook-Pro.hsd1.ca.comcast.net.