basis: add the basis of even cosines

1 files changed, 1 insertions, 0 deletions

diff --git a/basis.h b/basis.h
index 6b6f3c4..68c9597 100644
--- a/basis.h
+++ b/basis.h
@@ -26,6 +26,7 @@ enum BSEvalType {
 
 enum BasisFamily {
     BASIS_FAMILY_SB_EVEN,
+    BASIS_FAMILY_COS_EVEN,
 };
 
 typedef struct BasisSetContext BasisSetContext;