update truthiness for value-box groups

empty groups are false.  non-empty groups are true.

Any other structural types cannot exist in a value-box group.

diff --git a/src/lib/unlang/xlat_expr.c b/src/lib/unlang/xlat_expr.c
index 994a624166ae8eb2279dda3240404e9f7c77b2b0..42178d7554f4f1820f36620b7ae8e7eebb1a331e 100644 (file)
--- a/src/lib/unlang/xlat_expr.c
+++ b/src/lib/unlang/xlat_expr.c
@@ -608,7 +608,10 @@ static bool truthiness(fr_value_box_t const *in)
 
        switch (in->type) {
        case FR_TYPE_NULL:
+               return false;
+
        case FR_TYPE_STRUCTURAL:
+               if (in->type == FR_TYPE_GROUP) return (fr_value_box_list_len(&in->vb_group) > 0);
                return false;
 
        case FR_TYPE_BOOL: