How to add time to Clock.currTime

[Brad Anderson]

On Friday, 4 October 2013 at 21:50:31 UTC, Brad Anderson wrote:
> On Friday, 4 October 2013 at 21:46:43 UTC, JohnnyK wrote:
>> Hi All,
>>  I did search but I cannot find it anywhere.  All I want to do 
>> is add 300 seconds to the output of Clock.currTime.  So 
>> basically if Clock.currTime equals 2013-Oct-04 
>> 17:19:31.3338333 then I want to subtract 300 seconds from that 
>> to get the time that it was 300 seconds ago.  In other 
>> languages I would convert the time value to seconds and 
>> subtract the 300 seconds then convert it back to what ever 
>> time value it was before. I don't know how to convert 300 
>> seconds to hnsecs and I have never actually heard of hnsecs 
>> before.  Anyway if someone could help I would appreciate it.
>
> auto t = Clock.currTime;
> t -= 300.seconds;
> t += 300.seconds;

And just a little bit more info, another way to write this is:

auto t = Clock.currTime;
t -= seconds(300);
t += seconds(300);

The first way I wrote is just the UFCS version of that.

You could also do:

auto t = Clock.currTime;
t -= dur!"seconds"(300);
t += dur!"seconds"(300);

seconds() is just an alias for the dur template with the 
"seconds" template argument.