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fix segmentation fault caused by nothing next cur_op to end
author Takahiro SHIMIZU <anatofuz@cr.ie.u-ryukyu.ac.jp>
date Sun, 23 Dec 2018 21:23:56 +0900
parents 04ced10e8804
children
line wrap: on
line source

#define P(a,b) P1(a,b)
#define P1(a,b) a##b

#define ONCE(x, y) (x ?: (x = y()))
#define PREFIX

extern int P(PREFIX, init) (void);

int
fun(void)
{
  static int memo;
  return ONCE(memo, P(PREFIX, init));
}