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-rw-r--r--Documentation/guides/application-developer.rst12
1 files changed, 7 insertions, 5 deletions
diff --git a/Documentation/guides/application-developer.rst b/Documentation/guides/application-developer.rst
index 9a9905b1..92e2a373 100644
--- a/Documentation/guides/application-developer.rst
+++ b/Documentation/guides/application-developer.rst
@@ -116,19 +116,21 @@ available.
.. code:: cpp
- if (cm->cameras().empty()) {
+ auto cameras = cm->cameras();
+ if (cameras.empty()) {
std::cout << "No cameras were identified on the system."
<< std::endl;
cm->stop();
return EXIT_FAILURE;
}
- std::string cameraId = cm->cameras()[0]->id();
- camera = cm->get(cameraId);
+ std::string cameraId = cameras[0]->id();
+ auto camera = cm->get(cameraId);
/*
- * Note that is equivalent to:
- * camera = cm->cameras()[0];
+ * Note that `camera` may not compare equal to `cameras[0]`.
+ * In fact, it might simply be a `nullptr`, as the particular
+ * device might have disappeared (and reappeared) in the meantime.
*/
Once a camera has been selected an application needs to acquire an exclusive