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A fact from this article appeared on Wikipedia's Main Page in the "Did you know?" column on September 9, 2009. The text of the entry was: Did you know ... that decltype can be used to "clean up function syntax mess" in C++ programming? | |||||||||||||
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There should be a section here on the problem of decltype causing functions to accidentally return references to temporaries. Example:
Here, decltype(b ? t : u) will be T &, and this function will return a dangling reference. Does anyone have a citation for the appropriate critique? 74.125.122.49 (talk) 16:55, 5 January 2012 (UTC)
No mention of declval within article. Nor does there exist a wiki page for same. — Preceding unsigned comment added by 46.65.52.44 (talk) 19:51, 5 November 2012 (UTC)
decltype
(talk) 10:29, 4 June 2013 (UTC)It should be mentioned by some examples. And decltype(auto)
should be explained. --2A02:2028:2A7:C1B0:C89B:DE41:D2DA:146E (talk) 09:21, 25 August 2014 (UTC)
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The first sentence is a bit misleading:
I suggest rephrasing along the lines of "... query the type of a variable declaration or expression, depending on the argument."
Beginners often get burned by the fact that C++ uses one keyword for two different purposes, so introducing the keyword as if it's possible to understand it as a single concept can compound the problem.
Wikweb (talk) 18:36, 14 June 2021 (UTC)