Changes in / [803:53bea38f71cb:804:9fbbd802020f] in lemon

Files:

• Makefile.am (modified) (1 diff)
• lemon/path.h (modified) (1 diff)

Makefile.am

@@ -18 +18 @@
         cmake/FindGLPK.cmake \
         cmake/FindCOIN.cmake \
+        cmake/LEMONConfig.cmake.in \
         cmake/version.cmake.in \
         cmake/version.cmake \

lemon/path.h

@@ -1016 +1016 @@
   /// \brief The source of a path
   ///
-  /// This function returns the source of the given path.
+  /// This function returns the source node of the given path.
+  /// If the path is empty, then it returns \c INVALID.
   template <typename Digraph, typename Path>
   typename Digraph::Node pathSource(const Digraph& digraph, const Path& path) {
-    return digraph.source(path.front());
+    return path.empty() ? INVALID : digraph.source(path.front());
   }
 
   /// \brief The target of a path
   ///
-  /// This function returns the target of the given path.
+  /// This function returns the target node of the given path.
+  /// If the path is empty, then it returns \c INVALID.
   template <typename Digraph, typename Path>
   typename Digraph::Node pathTarget(const Digraph& digraph, const Path& path) {
-    return digraph.target(path.back());
+    return path.empty() ? INVALID : digraph.target(path.back());
   }