Found suspicious operator ',' [constStatement] warning for 2d std array

[haroim]

I have a piece of code which cppcheck warns me about, but I can't find out why.

If I declare "std::array<std::array<double,3>,3> array;" in a file, it warns: "warning: Found suspicious operator ',' [constStatement]", when I use the --enable=all option.</std::array<double,3>

I have reproduced this with just a cpp file with one function containing just this statement and one where I added the same statement with an initializer:

void Test()
 {
   std::array<std::array<double,3>,3> array;
   std::array<std::array<int, 3>, 3> arr = {{{5, 8, 2}, {8, 3, 1}, {5, 3, 9}}};
 }
 ```

 The result is:

 ```
 Checking test.cpp ...
test.cpp:3:34: warning: Found suspicious operator ',' [constStatement]
  std::array<std::array<double,3>,3> array;
                                 ^
test.cpp:4:32: warning: Found suspicious operator ',' [constStatement]
  std::array<std::array<int, 3>, 3> arr = {{{5, 8, 2}, {8, 3, 1}, {5, 3, 9}}};
                               ^
test.cpp:1:0: style: The function 'Test' is never used. [unusedFunction]

I am wondering whether this is a bug or if there is a real concern here. Thanks!

[Daniel Marjamäki]

Thanks! No real concern, Cppcheck is wrong. I created this ticket:
https://trac.cppcheck.net/ticket/9766

[haroim]

Thanks for the quick reply!