Find out if instead of returning a return parameter via a return statement, it is returned via assignment to either this or the first parameter.
This works the same as returning the value via a return statement. Although the first argument must be ref, it is not regarded as returning by ref.
function type
type of this parameter, or null if none
What a return parameter should transfer the lifetime of the argument to
https://dlang.org.spec/function.html#return-ref-parameters
See Implementation
Find out if instead of returning a return parameter via a return statement, it is returned via assignment to either this or the first parameter.
This works the same as returning the value via a return statement. Although the first argument must be ref, it is not regarded as returning by ref.