Insert the specified value into this set if a key equivalent to value does not already exist in this set; otherwise, if a key equivalent to value already exists in this set, this method has no effect. value is left in a valid but unspecified state. Return a pair whose first member is an iterator referring to the (possibly newly inserted) value_type object in this set that is equivalent to value, and whose second member is true if a new value was inserted, and false if the key was already present.
Declared in <bslstl_unorderedset.h>
template<class LOOKUP_KEY>
pair<iterator, bool>
insert(LOOKUP_KEY&& value)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, LOOKUP_KEY>::value
&& BloombergLP::bslmf::IsTransparentPredicate<EQUAL,LOOKUP_KEY>::value;Note: implemented inline due to Sun CC compilation error.