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Diffstat (limited to 'Documentation/guides/application-developer.rst')
| -rw-r--r-- | Documentation/guides/application-developer.rst | 12 |
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 |