[sys9mm@Sulfide:~/sources/ECDLP-Diem]$ make
g++ -Wall -Wextra -fsanitize=undefined -std=c++1z -O3 -Iinclude -march=native -g -Os -o  test/ff-basic.out test/ff-basic.cpp
In file included from test/ff-basic.cpp:5:0:
include/finitefield.hpp: In member function ‘constexpr std::bitset<(N * 2)> GF2n<N, IRR>::inv(const std::bitset<(2 * N)>&) const’:
include/finitefield.hpp:111:20: error: expected unqualified-id before ‘[’ token
         const auto [q,r] = bsdivqr(irr,k);
                    ^
include/finitefield.hpp:112:26: error: ‘r’ was not declared in this scope
         return bsmul(inv(r),q);
                          ^
include/finitefield.hpp:112:29: error: ‘q’ was not declared in this scope
         return bsmul(inv(r),q);
                             ^
make: *** [Makefile:20: test/ff-basic.out] Error 1

[sys9mm@Sulfide:~/sources/ECDLP-Diem]$ g++ --version
g++ (GCC) 6.4.0
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This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.