https://godbolt.org/z/zYdc9ej88
clang gets this right.
b) A return value that is explicitly marked like this is very different from an unused variable that gp suggested the cast to void idiom for. GCC does not warn on variables that are unused except for a cast to void.
I encounter this when trying to do best-effort logging in a failure path. I call some function to log and error and maybe it fails. If it does, what, exactly, am I going to do about it? Log harder?
When my database logging fails, I write a file that logs the database fail (but not the original log file).
When my file logging fails, depending on application, I'll try another way of getting the information (the fact that for file logging failed) out - be that an http request or an email or something else.
Databases fail, file systems fill up. Logging logging failures is extremely important.
and assigning to std::ignore works for both.
