终止/退出主要功能的D方式是什么?
import std.stdio;
import core.thread;
void main()
{
int i;
while (i <= 5)
{
writeln(i++);
core.thread.Thread.sleep( dur!("seconds")(1) );
}
if (i == 5)
{
writeln("Exit");
return; // I need terminate main, but it's look like break do exit only from scope
}
readln(); // it's still wait a user input, but I need exit from App in previous step
}
我尝试使用Google搜索并找到下一个问题D exit statement 有建议使用C退出功能。现代D中是否有任何新的未来,是否允许它更优雅?
答案 0 :(得分:5)
如果你没有紧急出口,那么你想清理一切。我为此目的创建了ExitException
:
class ExitException : Exception
{
int rc;
@safe pure nothrow this(int rc, string file = __FILE__, size_t line = __LINE__)
{
super(null, file, line);
this.rc = rc;
}
}
您对main()
功能进行编码,然后再
int main(string[] args)
{
try
{
// Your code here
}
catch (ExitException e)
{
return e.rc;
}
return 0;
}
在您需要退出时,请致电
throw new ExitException(1);
答案 1 :(得分:4)
导入stdlib并在传递0时调用exit。
import std.c.stdlib;
exit(0);