Shaperglot reporting missing punctuation?

[yanone]

I was under the impression that shaperglot would also report on characters missing in a font.
The attached font is missing », yet neither Fontbakery’s shape_languages check nor an explicit shaperglot check Maname-Regular.ttf fr_Latn complain about the missing glyph.

Maname-Regular.ttf.zip

[simoncozens]

Shaperglot just checks base characters.

[yanone]

I vaguely remember having talked about this a while back. Should it not maybe check everything except auxiliary?

[yanone]

Could the characters sets to check maybe be parameters of the check() method?

For instance, the GF_Latin_African glyphset even includes auxiliary characters, so ideally those would be checked as well. cc @moyogo

If shaperglot is the wrong place for this, I would instigate a new or revised fontbakery check, but it would really just duplicate functionality already existing in shaperglot.

[moyogo]

If a language uses » and a font doesn’t have it, that font doesn’t support that language.

The gflanguages punctuation data should be doublechecked but, at least for Latin, there’s a common set, plus or minus the variation of ‘ ’ “ ” « », or ¿ ¡.

Auxiliary is not well defined and gflanguages inherited the contradictions and inconsistencies from the sources it copied data from. The African Latin auxiliary data was narrowed down to historical use that may still occur.

Shaperglot should likely only check shaping of auxiliary chars if present, and maybe warn if not missing.

[vv-monsalve]

Shaperglot just checks base characters.

In this case, wouldn't the identified inconsistencies impact the results?

For instance, some languages do not include uppercase (or accented) letters in the base characters. e.g. bg_Cyrl

Could this lead to misleading results?

exemplar_chars {
  base: "а б в г д е ж з и й к л м н о п р с т у ф х ц ч ш щ ъ ь ю я"
  auxiliary: "{а̀} ѐ ё ѝ {о̀} {у̀} {ъ̀} ы ѣ э {ю̀} {я̀} ѫ"
  marks: "◌̀ ◌̆"
  numerals: "- , % + 0 1 2 3 4 5 6 7 8 9"
  punctuation: "- – — , ; : ! ? . … \' ‘ ‚ \" “ „ ( ) [ ] @ * /№"
  index: "А Б В Г Д Е Ж З И Й К Л М Н О П Р С Т У Ф Х Ц Ч Ш Щ Ю Я"
}