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Warn on second call of register_param_change_callback (#297)

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Rohan Agrawal 2016-12-22 13:56:44 -08:00 • committed by GitHub
parent 321e0b61b0
commit c0af872c18
1 changed files with 4 additions and 0 deletions
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4
rclcpp/src/rclcpp/node_interfaces/node_parameters.cpp
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@ -226,5 +226,9 @@ NodeParameters::list_parameters(const std::vector<std::string> & prefixes, uint6
void void
NodeParameters::register_param_change_callback(ParametersCallbackFunction callback) NodeParameters::register_param_change_callback(ParametersCallbackFunction callback)
{ {
if (parameters_callback_) {
fprintf(stderr, "Warning: param_change_callback already registered, "
"overwriting previous callback\n");
}
parameters_callback_ = callback; parameters_callback_ = callback;
} }