inserts a new element constructed from key and t if the key does not already exist

Synopsis

Declared in <nlohmann/ordered_map.hpp>

template<class KeyType>
requires detail::is_usable_as_key_type<key_compare, key_type, KeyType>::value
std::pair<iterator, bool>
emplace(
    KeyType&& key,
    T&& t);

Return Value

pair of an iterator to the (possibly pre‐existing) element and a bool that is true if the insertion took place

Parameters

Name

Description

key [in]

key of the element to insert

t [in]

value of the element to insert

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