constructor required for `unordered_map`?

[graial]

Greetings, I tried to #include "ArduinoFake.h" in a project tested with cpputest (both from docker & native install) and encountered this error.

compiling MyFirstTest.cpp In file included from /usr/local/include/c++/12.2.0/bits/hashtable.h:35, from /usr/local/include/c++/12.2.0/unordered_map:46, from mocks/ArduinoFake/src/ArduinoFake.h:8, from tests/MyFirstTest.cpp:3: /usr/local/include/c++/12.2.0/bits/hashtable_policy.h: In member function 'void std::detail::_Local_iterator_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash, _Unused, false>::_M_init(const __hash_code_base&)': /usr/local/include/c++/12.2.0/bits/hashtable_policy.h:1495:15: error: expected type-specifier before 'this' 1495 | { ::new(this->_M_h()) hash_code_base(__base); } | ^~~~ compilation terminated due to -Wfatal-errors.

Searching the internet, I've noticed threads like this which mention the need for a default constructor. This is pushing me into areas of C++ I am very unfamiliar with.
Is this something i can do during test set-up? If so, how?

I created minimal example here

Many thanks for any feedback or suggestions.

[FabioBatSilva]

Hi,

Might be something related to cpp 12.

You might wanna start with one of the examples and -std=gnu++17

[graial]

Good evening and thank you for your response. No luck with gnu++17 though.

these are the default compiler flags used by cpputest

-pedantic -Wno-missing-prototypes -Wno-strict-prototypes -Wno-c++14-compat --std=gnu++17 // was originally --std=c++11 -Wno-c++98-compat-pedantic -Wno-c++98-compat

[basvodde]

So... if you comment out all of the CppUTest code and just do the #include of the ArduinoFake then it already occurs ?

[graial]

yes, correct. and if that #include is removed, the test suite completes successfully

So there seems to be something in the makefile or compiler chain that is unhappy

[graial]

The ArduinoFake example projects and tests (using Unity) work for me.

I attempted to use the same approach to build cpputest in this repo and it fails on the same error.

[graial]

I've now gotten this to a minimal reproducible example via cmake.

i believe that the lines: set(CMAKE_CXX_STANDARD 17) set(CMAKE_CXX_STANDARD_REQUIRED ON)

establish the -std=gnu++17 specification

cheers

[graial]

Greetings @FabioBatSilva, just wanted to mention that with some help on the cpputest forum, I was able to clear this.

https://github.com/graial/ArduinoFake-cpputest

my forked repo is now building but encountering a different error which I haven't yet investigated. If I can't sort that out, I'll open up a different issue when i get the chance

cheers