| Technical Specification | ||||
| Filesystem library(filesystem TS) | ||||
| Library fundamentals(library fundamentals TS) | ||||
| Library fundamentals 2(library fundamentals TS v2) | ||||
| Library fundamentals 3(library fundamentals TS v3) | ||||
| Extensions for parallelism(parallelism TS) | ||||
| Extensions for parallelism 2(parallelism TS v2) | ||||
| Extensions for concurrency(concurrency TS) | ||||
| Extensions for concurrency 2(concurrency TS v2) | ||||
| Concepts(concepts TS) | ||||
| Ranges(ranges TS) | ||||
| Reflection(reflection TS) | ||||
| Mathematical special functions(special functions TR) | ||||
| Experimental Non-TS | ||||
| Pattern Matching | ||||
| Linear Algebra | ||||
| std::execution | ||||
| Contracts | ||||
| 2D Graphics |
| Member functions | ||||
optional::~optional | ||||
| Observers | ||||
| Modifiers | ||||
| Non-member functions | ||||
| Helper classes | ||||
| Helper objects | ||||
~optional(); | (library fundamentals TS) | |
If the object contains a value and the typeT is not trivially destructible (seestd::is_trivially_destructible), destroys the contained value by calling its destructor, as if byval->T::~T().
Otherwise, does nothing.
IfT is trivially-destructible, then this destructor is also trivial, sooptional<T> is also trivially-destructible.
