False positive "unusedStructMember" when wrapped in std::optional

[Dan Workman]

Found in 2.9 and 2.10

#include <iostream>
#include <optional>

struct Result {
  bool isValid{false};
};

std::optional<Result> GetResult()
{
  return Result{true};
}

int main()
{
  auto res = GetResult();

  if (res.has_value())
    std::cout << res->isValid;

  return 0;
}

Output:

$ cppcheck --std=c++17 --enable=all --platform=win64 cppcheck_false_positives.cpp
Checking cppcheck_false_positives.cpp ...
cppcheck_false_positives.cpp:8:8: style: struct member 'Result::isValid' is never used. [unusedStructMember]
  bool isValid{false};
       ^

[CHR]

Thanks for reporting, ticket is here: https://trac.cppcheck.net/ticket/11539