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Types of input for get_logger in ros2 RCLCPP_INFO

asked 2022-04-14 10:29:11 -0500

Flash gravatar image

updated 2022-04-14 10:38:07 -0500

I was trying to find what types of input can be provided for

RCLCPP_INFO(get_logger(), "data: %*", data)

I had used %s for string kind of output but was wondering if it can take any other types of data. While looking over some codes I saw the use of %g not sure what it represents.
Thanks in advance.

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answered 2022-04-14 20:08:54 -0500

aprotyas gravatar image

The second argument in the logging macros is a format specification, i.e. a pointer to a null-terminated multibyte string specifying how to interpret the data. As such, you can use any standard format specifier accepted by printf. Here's a small reference list:

Also, from the same link: %g converts floating-point number to decimal or decimal exponent notation depending on the value and the precision.

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Can I know which second argument you are talking about?

Flash gravatar image Flash  ( 2022-04-15 10:18:11 -0500 )edit

In RCLCPP_INFO(get_logger(), "data: %s", "message") the "data: %s" const character buffer would correspond to the second argument.

aprotyas gravatar image aprotyas  ( 2022-04-15 11:01:04 -0500 )edit

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Asked: 2022-04-14 10:29:11 -0500

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Last updated: Apr 14