Arduino CPP object reference in assignment

Asked Mar 23 '17 at 14:50

Active May 08 '17 at 14:21

Viewed 34 times

I have the following Ardruino CPP code. This code works fine:

while (rtc.now().second() != 0) delay(50);
curDateTime = rtc.now();

I wanted to move the assignment into the loop so that I'm capturing the time I'm actually testing. I thought I could assess the result of the assignment as shown below, but while the following compiles, it apparently throws an exception.

while ((curDateTime = rtc.now()).second() != 0) delay(50);

I'm using the first example, so it is working, but I really would like to understand what I did wrong with the second example.

I kept the example super short in the hope that my error would be obviously and easy to explain. If not, I will just dig in a little more on my side.

Many Thanks!!

asked Mar 23 '17 at 14:50

Gronk

Please post a [mcve]. Add this line to barebones sketch with all the necessary imports to get it to run. – Morgoth Mar 23 '17 at 15:05
Just a guess - you're calling.second() without knowing that you have an object from rtc.now() – Tim Mar 23 '17 at 15:11
The second example looks terribly... wrong. Delay inside while(_condition_) ?... – סטנלי גרונן Mar 23 '17 at 18:16
Are you sure the exception comes from that bit of the code? Morgoth is right, we need a small, complete example. We need the context to understand the problem. – Adrian McCarthy Mar 23 '17 at 18:57

Arduino CPP object reference in assignment

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