Tests whether an optional_ref holds a value.

Synopsis

Declared in <absl/types/optional_ref.h>

template<typename T>
constexpr
bool
operator!=(
    std::nullopt_t a,
    optional_ref<T> b);

Return Value

true if b holds a value.

Parameters

Name

Description

a

The std::nullopt tag.

b

The reference to test.

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