Categoricals: Replace single value by a case, so that interactions can be supported

[pspp] / src / math / interaction.h

diff --git a/src/math/interaction.h b/src/math/interaction.h
index 96c2940aef72d7e1f13f1305c9112f58d347fa44..cd38ae226ea81b6e288c80c6a4aa30aa03e8e066 100644 (file)
--- a/src/math/interaction.h
+++ b/src/math/interaction.h
@@ -43,5 +43,7 @@ struct ccase;
 unsigned int interaction_case_hash (const struct interaction *, const struct ccase *);
 bool interaction_case_equal (const struct interaction *, const struct ccase *, const struct ccase *);
 bool interaction_case_is_missing (const struct interaction *, const struct ccase *, enum mv_class);
+int interaction_case_cmp_3way (const struct interaction *, const struct ccase *, const struct ccase *);
+
 
 #endif