accesses the element with the given key, with bounds checking

Synopsis

Declared in <nlohmann/ordered_map.hpp>

template<class KeyType>
requires detail::is_usable_as_key_type<key_compare, key_type, KeyType>::value
T&
at(KeyType&& key);

Exceptions

Name

Thrown on

std::out_of_range

if the container does not have an element with the given key

Return Value

reference to the value associated with key

Parameters

Name

Description

key [in]

key of the element to access

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