copy and paste this google map to your website or blog!
Press copy button and paste into your blog or website.
(Please switch to 'HTML' mode when posting into your blog. Examples: WordPress Example, Blogger Example)
Input Form:Deal with this potential dealer,buyer,seller,supplier,manufacturer,exporter,importer
(Any information to deal,buy, sell, quote for products or service)
std::optional lt;T gt;::optional - cppreference. com That value is determined by whether the provided std::optional<U> object contains a value, rather than the bool value direct-initialized from the contained value:
std::make_optional - cppreference. com Effectively calls std::optional<std::decay_t<T>>(std::forward<T>(value)) 2) Creates an optional object constructed in-place from args Equivalent to returnstd::optional<T>(std::in_place, std::forward<Args>(args) ); This overload participates in overload resolution only if std::is_constructible_v<T, Args > is true
std::optional lt;T gt;:: transform - cppreference. com If *this contains a value, invokes f with the contained value as an argument, and returns an std::optional that contains the result of that invocation; otherwise, returns an empty std::optional
std::optional lt;T gt;::or_else - cppreference. com 1) Equivalent to return*this ?*this :std::forward<F>(f)(); This overload participates in overload resolution only if both std::copy_constructible<T> and std::invocable<F> are modeled