std::experimental::observer_ptr<W>::operator bool

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)

constexpr explicit operator bool() const noexcept;		(library fundamentals TS v2)

Checks whether *this has an associated watched object, i.e. whether get() != nullptr.

Compiler support
Freestanding and hosted
Language
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Metaprogramming library (C++11)
Diagnostics library
General utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Localizations library
Input/output library
Filesystem library (C++17)
Regular expressions library (C++11)
Concurrency support library (C++11)
Technical specifications
Symbols index
External libraries

experimental::propagate_const
experimental::not_fn
experimental::observer_ptr
experimental::make_array
experimental::to_array
experimental::ostream_joiner
experimental::gcd
experimental::lcm
experimental::source_location
experimental::randint
detection idiom
uniform container erasure
logical operator type traits

Member functions
observer_ptr::observer_ptr
Modifiers
observer_ptr::release
observer_ptr::reset
observer_ptr::swap
Observers
observer_ptr::get
observer_ptr::operator bool
observer_ptr::operator*observer_ptr::operator->
Conversions
observer_ptr::operator element_type*
Non-member functions
make_observer
operator==operator!=operator<operator>operator<=operator>operator>=
swap
std::hash