at overloads

Synopses

Declared in <bslstl_unorderedmap.h>

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.

add_lvalue_reference<Json>::type
at(key_type const& key);

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Return a reference providing non‐modifiable access to the mapped‐value associated with the specified key, if such an entry exists; otherwise throw a std::out_of_range exception. Note that this method is not exception‐neutral.

add_lvalue_reference<Json const>::type
at(key_type const& key) const;

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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.

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

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Return a reference providing non‐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.

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

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