Tests/feaLib/data/GPOS_2.fea

languagesystem DFLT dflt;

# Mixes kerning between single glyphs, and class-based kerning.
# https://github.com/fonttools/fonttools/issues/456
lookup MixedKerning {
    pos v v 14;
    pos [D O Q] [T V W] -26;
} MixedKerning;

lookup GlyphKerning {
    pos T one 100;
    pos T two 200;
    pos T two.oldstyle 200;
    pos T three 300;
    pos T four 400;
    pos X a 100;
    pos X b 200;
    pos Y a 100;
    pos Y b 200;
    pos Y c <3 3 3 3>;
} GlyphKerning;

feature kern {
    lookup GlyphKerning;
    lookup MixedKerning;
} kern;

feature vkrn {
    pos T one 100;
} vkrn;