Fix inf and sup of empty set

JuliaIntervals · Sep 27, 2018 · 4116481 · 4116481
1 parent 8132d1c
commit 4116481
Showing 1 changed file with 11 additions and 2 deletions.
diff --git a/src/intervals/arithmetic.jl b/src/intervals/arithmetic.jl
@@ -281,8 +281,17 @@ end
 
 
 # Infimum and supremum of an interval
-inf(a::Interval) = a.lo
-sup(a::Interval) = a.hi
+function inf(a::Interval)
+    isempty(a) && return -Inf
+
+    return a.lo
+end
+
+function sup(a::Interval)
+    isempty(a) && return Inf
+
+    return a.hi
+end
 
 
 ## Functions needed for generic linear algebra routines to work