Temporary header file '/tmp/B4vAN7NiE8/dump1.h' with the following content will be compiled to create GCC translation unit dump:

  // add defines
  #define __STDC_VERSION__ 201710L
#define _GXX_NULLPTR_T
#define CLUTTER_ENABLE_COMPOSITOR_API 1
#define _REGEX_NELTS(n)
#define _Atomic
#define PACKED
#define getaddrinfo_a(a,b,c,d)

  // add includes
  #include "/usr/include/hnswlib/bruteforce.h"
  #include "/usr/include/hnswlib/hnswalg.h"
  #include "/usr/include/hnswlib/hnswlib.h"
  #include "/usr/include/hnswlib/space_ip.h"
  #include "/usr/include/hnswlib/space_l2.h"
  #include "/usr/include/hnswlib/visited_list_pool.h"

  // add namespaces
  namespace hnswlib{typedef int tmp_add_type_1;}
  hnswlib::tmp_add_type_1 tmp_add_func_1(){return 0;};

  // add classes
  _G_fpos64_t* tmp_add_class_0;
  _G_fpos_t* tmp_add_class_1;
  _IO_cookie_io_functions_t* tmp_add_class_2;

The GCC parameters:
  gcc -fdump-lang-raw -fkeep-inline-functions -c -x c++ -fpermissive -w "/tmp/B4vAN7NiE8/dump1.h"

In file included from /tmp/B4vAN7NiE8/dump1.h:12:
/usr/include/hnswlib/bruteforce.h:9:55: error: expected template-name before ‘<’ token
    9 |     class BruteforceSearch : public AlgorithmInterface<dist_t> {
      |                                                       ^
/usr/include/hnswlib/bruteforce.h:9:55: error: expected ‘{’ before ‘<’ token

