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std::expected::error(3) C++ Standard Libary std::expected::error(3)

NAME

std::expected::error - std::expected::error

Synopsis


constexpr const E& error() const& noexcept; (1) (since C++23)
constexpr E& error() & noexcept; (2) (since C++23)
constexpr const E&& error() const&& noexcept; (3) (since C++23)
constexpr E&& error() && noexcept; (4) (since C++23)


Accesses the unexpected value contained in *this.


The behavior is undefined if this->has_value() is true.

Parameters


(none)

Return value


Reference to the unexpected value contained in *this.

Example


This section is incomplete
Reason: no example

See also


operator-> accesses the expected value
operator* (public member function)
value returns the expected value
(public member function)
operator bool checks whether the object contains an expected value
has_value (public member function)

Category:


* Todo no example

2024.06.10 http://cppreference.com