region: add "has" point query

region.cpp

@@ -180,6 +180,15 @@ util::region<S,T>::contains (point_t q) const
 }
 
 
+//-----------------------------------------------------------------------------
+template <size_t S, typename T>
+bool
+util::region<S,T>::has (const point_t q) const noexcept
+{
+    return all (q >= p) && all (q < p + e);
+}
+
+
 //-----------------------------------------------------------------------------
 // FIXME: This will fail with an actual infinite range (NaNs will be generated
 // in the conditionals).

region.hpp

@@ -74,6 +74,7 @@ namespace util {
         bool includes (point_t) const; // inclusive of borders
         bool contains (point_t) const; // exclusive of borders
         bool intersects (region<S,T>) const;  // exclusive of borders
+        bool has (point_t) const noexcept; // inclusive of top and left borders
 
         // Move a point to be within the region bounds
         void constrain (point_t&) const;

test/region.cpp

@@ -57,6 +57,10 @@ main (int, char **)
         tap.expect ( r.contains (util::point2u {1, 1}), "unsigned region center contains");
         tap.expect (!r.contains (util::point2u {0, 0}), "unsigned region base contains");
         tap.expect (!r.contains (util::point2u {2, 2}), "unsigned region corner contains");
+
+        tap.expect ( r.has (util::point2u {1, 1}), "unsigned region centre has");
+        tap.expect ( r.has (util::point2u {1, 1}), "unsigned region base has");
+        tap.expect (!r.has (util::point2u {2, 2}), "unsigned region corner has");
     }
 
     //CHECK (region<2,intmax_t> (0, 0, 10, 10).includes (point2d (0.4, 0.01)));