Namespaces
Variants
Views
Actions

std::experimental::optional<T>::operator bool

From cppreference.com
 
 
Experimental
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
 
 
 
constexpr explicit operator bool() const noexcept;
(library fundamentals TS)

Checks whether *this contains a value.

[edit] Parameters

(none)

[edit] Return value

true if *this contains a value, false if *this does not contain a value.