Incorrect formatting of lambdas inside brace initialisation when the return type has []

[abt8601]

Here is a small example that demonstrates the bug:

#include <variant>

// Utilities for working with std::variant. Taken from
// https://en.cppreference.com/w/cpp/utility/variant/visit

template <class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
template <class... Ts> overloaded(Ts...) -> overloaded<Ts...>;

namespace ns {

void foo() {
  std::variant<int, double> v;
  std::visit(overloaded{[](auto &&) -> int (*)[] { return nullptr; }}, v);
}

} // namespace ns

After formatting:

#include <variant>

// Utilities for working with std::variant. Taken from
// https://en.cppreference.com/w/cpp/utility/variant/visit

template <class... Ts> struct overloaded : Ts... { using Ts::operator()...; };
template <class... Ts> overloaded(Ts...) -> overloaded<Ts...>;

namespace ns {

void foo() {
  std::variant<int, double> v;
  std::visit(overloaded{[](auto &&) -> int (*)[] { return nullptr;
}
} // namespace ns
, v);
}

} // namespace ns

The bug also appears if the return type is std::unique_ptr<int[]>. It does not appear when the return type doesn't have [], e.g. int *.

I suspect that it's related to #27146 and #40694, but I'm not certain.

.clang-format:

BasedOnStyle: LLVM

clang-format --version:

clang-format version 13.0.0 (Fedora 13.0.0-3.fc35)

[mkurdej]

Review: https://reviews.llvm.org/D116553.