Trying to compile the StaticQueue in STM32cubeIde (arm-none-eabi) throws an error

[SlowTypist]

... template <typename T> class StaticQueueBase<T>::ConstIterator : public StaticQueueBase<T>::template IteratorBase<typename StaticQueueBase<T>::ConstIterator, const StaticQueueBase<T> > { ... template <typename T> class StaticQueueBase<T>::Iterator : public StaticQueueBase<T>::template IteratorBase<typename StaticQueueBase<T>::Iterator, StaticQueueBase<T> > { ...

throws an error "expected class-name before '{' token".

[arobenko]

1. Insufficient information is provided to help identify the problem.
2. This library was developed more than 10 years ago with older compilers and is not really maintained.

[SlowTypist]

It is about this line https://github.com/arobenko/embxx/blob/edd548239a10bb7c8fda32ddb445305289bfe805/embxx/container/StaticQueue.h#L1166 and this https://github.com/arobenko/embxx/blob/edd548239a10bb7c8fda32ddb445305289bfe805/embxx/container/StaticQueue.h#L1188

[arobenko]

Without seeing full errors dump I'm not sure what you compiler dislikes. Try adding typename between public and StaticQueueBase<T>.

class StaticQueueBase<T>::ConstIterator :
            public typename StaticQueueBase<T>::template
                IteratorBase<typename StaticQueueBase<T>::ConstIterator, const StaticQueueBase<T> >