access specified object element with bounds checking
Synopsis
Declared in <nlohmann/json.hpp>
template<class KeyType>
requires detail::is_usable_as_basic_json_key_type<basic_json_t, KeyType>::value
reference
at(KeyType&& key);Return Value
reference to the element with key key
Parameters
Name |
Description |
key |
key of the element to access |
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