Return a modifiable reference to the mapped value for key.

Synopsis

Declared in <bslstl_unorderedmap.h>

template<class LOOKUP_KEY>
add_lvalue_reference<VALUE>::type
at(LOOKUP_KEY const& key)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
        && BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;

Description

Return a reference providing modifiable access to the mapped‐value associated with a key that is equivalent to the specified key, if such an entry exists; otherwise, throw a std::out_of_range exception. Note that this method may also throw a different kind of exception if the (user‐supplied) comparator throws.

Note: implemented inline due to Sun CC compilation error

Return Value

modifiable reference to the mapped value

Parameters

Name

Description

key

key whose mapped value is accessed

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