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Can FunctionObject be deprecated and replaced by Callable? [message #1828164]

Wed, 03 June 2020 03:53

Eclipse User

Use case:

vector<string> names = {"Not empty"};
auto const all_empty = all_of(begin(names), end(names), &string::empty);
I looked through a few invoke-related papers (N4169, P0077R2... any others?) to see if relaxing the algorithm requirements was considered or discussed but I couldn't find any mention of the idea. Is it because it's dumb in some way? If so please clue me in :).

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[Updated on: Thu, 04 June 2020 00:53] by Moderator

Re: Can FunctionObject be deprecated and replaced by Callable? [message #1828235 is a reply to message #1828164]

Thu, 04 June 2020 10:41

Eclipse User

Hi,

Your question has nothing to do with the CDT which is an C/C++ IDE.

But the third argument of std::all_of should be an unary predicate for which the expression predicate(element) should be convertable to bool. See https://en.cppreference.com/w/cpp/algorithm/all_any_none_of.

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