Document logic

googlefonts · Nov 25, 2024 · d1f22f7 · d1f22f7
1 parent f0798ae
commit d1f22f7
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/Lib/ufo2ft/featureWriters/markFeatureWriter.py b/Lib/ufo2ft/featureWriters/markFeatureWriter.py
@@ -746,6 +746,8 @@ def includedInClass(gdefClass: Optional[Set[str]], glyphName: str) -> bool:
                 if not anchor.isContextual:
                     continue
 
+                # See "after" truth table for what this logic hopes to achieve:
+                # https://github.com/googlefonts/ufo2ft/pull/890#issuecomment-2498032081
                 if anchor.number is not None and includedOrNoClass(
                     ligatureClass, glyphName
                 ):