This patch extends clang-tidy's readability-redundant-smartptr-get to produce warnings for previously unsupported cases:
std::unique_ptr<void> ptr; if (ptr.get()) if (ptr.get() == NULL) if (ptr.get() != NULL)
This is intended to fix https://llvm.org/bugs/show_bug.cgi?id=25804, a bug report opened by @Eugene.Zelenko.
However, there still are cases not detected by the check. They can be found in void Negative() function defined in test/clang-tidy/readability-redundant-smartptr-get.cpp.