* refactor: mark subclass' destructors as override.
* refactor: use QUrl to parse announce URL strings.
The prompt for this was to work around a clang-tidy issue where
"char* host = nullptr;" triggers a "don't use varargs" warning,
but on the other hand it's also terser / cleaner.
* refactor: make the TorrentDelegate brushes const.
* refactor: s/auto/auto const*/ where appropriate
* chore: add some nonconst global warning exemptions
* chore: turn off warnings in GTest
* refactor: just disable the clang-tidy warning.
Apparently a std::array<T>::iterator is a T* on clang, since clang-tidy's
readability warning says we should use 'auto*' instead of 'auto'. However
adding that annotation fails on MSVC, where the is apparently _not_ a raw
pointer.
Since there's not a way to satisfy both of them at the same time, disable
the warning.
* refactor: use snake_case field naming in qt client
* fix: some missed symbols
* chore: make uncrustify happy
* fixup! refactor: use snake_case field naming in qt client
This way all the qualifiers (`const`, `volatile`, `mutable`) are grouped
together, e.g. `T const* const x` vs. `const T* const x`. Also helps reading
types right-to-left, e.g. "constant pointer to constant T" vs. "constant
pointer to T which is constant".
There're places where manual intervention is still required as uncrustify
is not ideal (unfortunately), but at least one may rely on it to do the
right thing most of the time (e.g. when sending in a patch).
The style itself is quite different from what we had before but making it
uniform across all the codebase is the key. I also hope that it'll make the
code more readable (YMMV) and less sensitive to further changes.
This refactoring is driven by the need to be able to do true queued RPC calls
(where each successive call uses the result of the previous).
Currently, such queueing of requests is done by assigning them special "magic"
tag numbers, which are then intercepted in one big switch() statement and acted
upon. This (aside from making code greatly unclear) effectively makes each such
queue a singleton, because state passing is restricted to global variables.
We refactor RpcClient to assign an unique tag to each remote call, and then
abstract all the call<->response matching with Qt's future/promise mechanism.
Finally, we introduce a "RPC request queue" class (RpcQueue) which is built on
top of QFutureWatcher and C++11's <functional> library. This class maintains
a queue of functions, where each function receives an RPC response, does
necessary processing, performs another call and finally returns its future.
