Insert the specified key into this set if not already present.
Declared in <bdlc_flathashset.h>
template<class LOOKUP_KEY>
bsl::pair<iterator, bool>
insert(LOOKUP_KEY&& key)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
&& BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;Insert the specified key into this set if a key equivalent to k does not already exist in this set; otherwise, this method has no effect. Return a pair containing an iterator referring to the newly inserted element and true if a element was inserted. Return a pair containing an iterator to an existing element and false if the value already existed in the set.
pair of iterator to the element and whether insertion occurred
| Name | Description |
|---|---|
| key | key to insert |