Allow declaring uninitialized parameters #798
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Parameters can now be declared without a default value and without an override. Attempting to access a statically typed parameter that does not have value will raise an exception. Getting dynamically typed parameters will return an unset parameter value. This change is equivalent to that made in rclcpp: ros2/rclcpp#1673 Signed-off-by: Jacob Perron <jacob@openrobotics.org>
jacobperron
commented
May 18, 2021
Signed-off-by: Jacob Perron <jacob@openrobotics.org>
ivanpauno
reviewed
May 18, 2021
| @@ -364,7 +364,6 @@ def declare_parameters( | |||
| parameters: List[Union[ | |||
| Tuple[str], | |||
| Tuple[str, Parameter.Type], | |||
| Tuple[str, Any], | |||
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wasn't this for passing a value, e.g.: declare_parameters('', [('my_param', 5)])?
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I think the annotation was incorrect before. IIUC, we only expect a tuple up to length 3. The last value of the tuple can have type ParameterDescriptor or Any (for the case of passing a value).
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Line 630 in 1b335d3
We actually can be more specific than using Any, I think Union[int, float, str, bytes, None] would be fine
wjwwood
approved these changes
May 18, 2021
Signed-off-by: Jacob Perron <jacob@openrobotics.org>
Signed-off-by: Jacob Perron <jacob@openrobotics.org>
Signed-off-by: Jacob Perron <jacob@openrobotics.org>
This is the same behavior as rclcpp. Signed-off-by: Jacob Perron <jacob@openrobotics.org>
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Thanks for the reviews. I think I've addressed everything. PTAL. |
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CI:
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Thanks for triggering CI! |
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Just retriggering Linux to confirm the linter is happy now: |
jacobperron
added a commit
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May 19, 2021
* Allow declaring uninitialized parameters Parameters can now be declared without a default value and without an override. Attempting to access a statically typed parameter that does not have value will raise an exception. Getting dynamically typed parameters will return an unset parameter value. This change is equivalent to that made in rclcpp: ros2/rclcpp#1673 Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Fix flake8 Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Minor refactor Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Don't allow static parameters to be undeclared Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Return alternative for uninitialized parameters in get_parameter_or Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Ditto for dynamic parameters This is the same behavior as rclcpp. Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Fix lint Signed-off-by: Jacob Perron <jacob@openrobotics.org>
jacobperron
added a commit
that referenced
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May 20, 2021
* Allow declaring uninitialized parameters Parameters can now be declared without a default value and without an override. Attempting to access a statically typed parameter that does not have value will raise an exception. Getting dynamically typed parameters will return an unset parameter value. This change is equivalent to that made in rclcpp: ros2/rclcpp#1673 Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Fix flake8 Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Minor refactor Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Don't allow static parameters to be undeclared Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Return alternative for uninitialized parameters in get_parameter_or Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Ditto for dynamic parameters This is the same behavior as rclcpp. Signed-off-by: Jacob Perron <jacob@openrobotics.org> * Fix lint Signed-off-by: Jacob Perron <jacob@openrobotics.org>
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Parameters can now be declared without a default value and without an override.
Attempting to access a statically typed parameter that does not have value will raise an exception.
Getting dynamically typed parameters will return an unset parameter value.
This change is equivalent to that made in rclcpp: ros2/rclcpp#1673