Description
The type "std::error_code" is part of the standard library for communicating errors when not using exceptions in C++. When an error is set, it constructs an object that is an integer and a reference to an object that can translate that integer into a string. However, the Watch window by default displays errors like this:
err = std::error_code = {std::_V2::error_category: 2}
To get the message string, one has to invoke err.message(). For an error type on the stack, I can do that, although it is annoying that I cannot simply add a watch to err or get that info through hover. When the error is embedded in a cluster of more information, it gets harder.
Currently natvis cannot be taught how to display the message because that involves invoking a function. Is there any way to add the view functionality for err specifically without opening up the full can of worms that is arbitrary function invocation?