# Discretionary Ligatures
# https://learn.microsoft.com/en-us/typography/opentype/spec/features_ae#dlig

# Set IgnoreMarks to skip over marks in lookups.
# For example, if we have /f/acutecomb/i, treat lookup as /f/i
# https://learn.microsoft.com/en-us/typography/opentype/spec/chapter2#lookup-table
lookupflag IgnoreMarks;

# left side "trigger" glyph for t.1 and f.1 sub
@DLIG_L_t = [
  f f.1 fdotaccent feng

  k khook kcommaaccent kcaron kacute kdotbelow klinebelow k.base

  r rrthook uni024D rfishhook rdescend racute rcommaaccent rcaron
  rdblgrave rinvertedbreve rdotaccent rdotbelow rdotbelowmacron rlinebelow

  t t.1 tpalatalhook trthook tcurl tbar tcedilla tcaron tcommaaccent tdotaccent
  tdotbelow tlinebelow tcircumflexbelow tdieresis

  v vtilde vdotbelow

  w wdieresis wcircumflex wgrave wacute wdotaccent wdotbelow wring

  x xdotaccent xdieresis khacyrillic chi

  y ydieresis uni024F yacute ycircumflex uni0233 ydotaccent yring ygrave ydotbelow
  yhookabove ytilde ucyrillic ushortcyrillic umacroncyrillic udieresiscyrillic
  uhungarumlautcyrillic yogonek y.sc
];

# ffi (note. f.i is sub'd by liga)
sub f [ f f.i ]' i by f.i.1;

# tt, ft, rt, tf, ff, ft ...
sub @DLIG_L_t t' by t.1;
sub @DLIG_L_t f' by f.1;

# interrobang
sub exclam question by interrobang;
sub question exclam by interrobang;
sub exclamdown questiondown by invertedinterrobang;
sub questiondown exclamdown by invertedinterrobang;