[
https://issues.apache.org/jira/browse/ARROW-12816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Antoine Pitrou closed ARROW-12816.
----------------------------------
Resolution: Duplicate
> [C++] C++14 laundry list
> ------------------------
>
> Key: ARROW-12816
> URL: https://issues.apache.org/jira/browse/ARROW-12816
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Ben Kietzman
> Priority: Major
>
> Improvements to make/be aware of once C++14 is available:
> - Ensure that lambda closure members are moved into where ever
> possible/appropriate. We have a lot of local variables whose only function is
> getting copied into a closure, including some demotions to shared_ptr since
> move only types can't be closed over in c++11
> - visitor pattern can be used more fluidly with template lambdas, for example
> we could have a utility like
> {code:cpp}
> VisitInts(offset_width, offset_bytes, [&](auto* offsets) { /*mutate offsets*/
> })
> {code}
> to replace a switch statement like
> {code:cpp}
> switch (offset_width) {
> case 8:
> /* mutate offsets<int8_t> */
> break;
> case 16:
> /* mutate offsets<int16_t> */
> break;
> // ...
> }
> {code}
> - deduced return type with {{auto}}:
> {code:cpp}
> template <typename Container>
> auto GetBeginAndEnd(const Container& cont) {
> return std::make_pair(cont.begin(), cont.end());
> }
> {code}
> - constexpr switch, for use in type traits functions
> - std::enable_if_t
> - std::quoted is available for escaping strings
> - std::make_unique
> - standard {{[[deprecated]]}} attribute
> - temporal literals such as ""s, ""ns, ...
> - binary literals with place markers such as 0b1100_1111
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
