Is it possible to create custom rules for clang-format?

Question

There a some external libraries that use a unique coding style. One example would be Qt's signal/slot-connect syntax.

connect(sender.data(), &Sender::valueChanged,
        receiver,      &Receiver::updateValue);

clang-format using a slightly modified llvm formatting reorders this statement to

connect(sender.dataa(), &Sender::valueChanged, receiver, &Receiver::updateValue);

or

connect(sender.dataa(),
        &Sender::valueChanged,
        receiver,
        &Receiver::updateValue);

if it exceeds the 80-character limit.

Is there a possibility to create custom rules for special commands like this, so that it gets formatted as in the first example?

Answer 1

I don't know of a way to create custom rules, but a workaround could be to tell clang-format to skip the relevant sections with // clang-format off and // clang-format on. (See How to make clang-format skip sections of c++ code)