Cpluzplus

Thursday, December 19, 2013

Comments for Sutter's Mill

Comment on GotW #90 Solution: Factories by Fahiem Bacchus

self documentation vs auto.
In example 2.

  unique_ptr<widget> load_widget( widget::id desired );

You get self documentation—you can see in the code that you get control over widget.

Once you use auto

  // Accept as a unique_ptr (by default)  auto up = load_widget(1);

we have to look up the signature of load_widget…it is no longer documented in the call.

This seems to be a subtle trade off here. Any thoughts?

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