memo/20060303

created 2006-03-03 modified 2006-03-03 

メンバ初期化リスト

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <sys/time.h>
using namespace std;

struct Hoge
{
   struct timeval tv_;
   Hoge(
	struct timeval tv = timeval((struct timeval){1, 2})
	)
	: tv_( tv )
   {}
   void dump() const
   {
	printf( "Hoge %p" "\n", this );
	printf( " tv_ = { %u, %u }" "\n"
		, tv_ . tv_sec, tv_ . tv_usec
	    );
   }
};

int main( int argc, char **argv )
{
   Hoge h1;
   h1 . dump();

   struct timeval tv = { 3, 4 };
   Hoge h2( tv );
   h2 . dump();

   Hoge h3( timeval((struct timeval){5,6}) );
   h3 . dump();

   return EXIT_SUCCESS;
}

Hoge 0xbfeb2050
 tv_ = { 1, 2 }
Hoge 0xbfeb2040
 tv_ = { 3, 4 }
Hoge 0xbfeb2038
 tv_ = { 5, 6 }