Won't compile with gcc 15.2

[vldevel]

I cannot compile this with gcc 15.2 or clang 21.1.1.

With clang (which outputs more explicit error messages), I get:

~/poc/include/hammer/pattern.hpp:79:10: error: no member named 'rotate' in namespace 'std'
   79 |     std::rotate(dst.begin(), dst.end() - shift, dst.end());
      |          ^~~~~~
~/poc/src/pattern.cpp:17:10: error: no member named 'sort' in namespace 'std'; did you mean 'qsort'?
   17 |     std::sort(flat.begin(), flat.end(), cmp);
      |          ^~~~
      |          qsort
/usr/bin/../lib/gcc/x86_64-mandriva-linux/15/../../../../include/c++/15/cstdlib:167:11: note: 'qsort' declared here
  167 |   using ::qsort;
      |           ^
~/poc/src/pattern.cpp:17:44: error: too few arguments to function call, expected 4, have 3
   17 |     std::sort(flat.begin(), flat.end(), cmp);
      |     ~~~~~~~~~                              ^
/usr/include/stdlib.h:970:13: note: 'qsort' declared here
  970 | extern void qsort (void *__base, size_t __nmemb, size_t __size,
      |             ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  971 |                    __compar_fn_t __compar) __nonnull ((1, 4));
      |                    ~~~~~~~~~~~~~~~~~~~~~~
~/poc/src/pattern.cpp:112:17: error: implicit instantiation of undefined template 'std::array, 4>'
  112 |     burst_array template_bursts;
      |                 ^
/usr/bin/../lib/gcc/x86_64-mandriva-linux/15/../../../../include/c++/15/bits/stl_pair.h:99:12: note: template is declared here
   99 |     struct array;
      |            ^
~/poc/src/pattern.cpp:169:17: error: implicit instantiation of undefined template 'std::array, 5>'
  169 |     burst_array template_bursts;
      |                 ^
/usr/bin/../lib/gcc/x86_64-mandriva-linux/15/../../../../include/c++/15/bits/stl_pair.h:99:12: note: template is declared here
   99 |     struct array;
      |            ^
5 errors generated.

To resolve this you need to add #include <algorithm> and #include <array> to include/hammer/pattern.hpp.