Return a modifiable reference to the mapped value for key.
Declared in <bslstl_unorderedmap.h>
add_lvalue_reference<VALUE>::type
at(key_type const& key);Return a reference providing modifiable access to the mapped-value associated with the specified key, if such an entry exists; otherwise throw std::out_of_range exception. Note that this method is not exception-neutral.
modifiable reference to the mapped value
| Name | Description |
|---|---|
| key | key to look up |