clang-tools-extra/test/clang-doc/DR-131697.cpp

// RUN: rm -rf %t && mkdir -p %t
// RUN: split-file %s %t
// RUN: clang-doc -format=html %t/compile_commands.json %t/main.cpp

//--- main.cpp

class Foo {
  void getFoo();
};

int main() {
  return 0;
}

//--- compile_commands.json
[{
  "directory" : "foo",
  "file" : "main.cpp",
  "command" : "clang main.cpp -c"
}]