VIM uses the match substitution command mate expression to implement an increment substitution

: Let n=100 | G/while/s/\d/\=n/| Let N=n+1

Before

Ten void *thread_function_1 (void *arg) {one         int i;         1 while (                 "thread 1 says hi!\n"); 15
   g_counter + = 1;                 sleep (1); +         return NULL; +  void *thread_function_2 (void *arg) {         24 int i;  While         (1)         {                 says ("Thread 2 hi!\n"),                 g_counter + = 2,                 sleep (1), and         return NULL; 31} 32< c18/>33 void *thread_function_3 (void *arg) {         1) PNS (                 "thread 3 S") Ays hi!\n ");                 G_counter + = 2;                 sleep (1);         

After

Ten void *thread_function_1 (void *arg) {one         int i;         1 while (                 "thread 1 says hi!\n"); 15
   g_counter + = 1;                 sleep (1); +         return NULL; +  void *thread_function_2 (void *arg) {         24 int i;  While         (1)         {                 says ("Thread 2 hi!\n"),                 g_counter + = 2,                 sleep (1), and         return NULL; 31} 32< c18/>33 void *thread_function_3 (void *arg) {         1) PNS (                 "thread 3 S") Ays hi!\n ");                 G_counter + = 2;                 sleep (1);         

VIM uses the match substitution command mate expression to implement an increment substitution