#ifndef TOOLS_H_
#define TOOLS_H_

// C2x typeof supported by clang and gcc but not by ccls.
#define SWAP(a, b)                                                             \
  do {                                                                         \
    __typeof__(a) temp;                                                        \
    temp = a;                                                                  \
    a    = b;                                                                  \
    b    = temp;                                                               \
  } while (0)

#endif // TOOLS_H_