erase overloads

Synopses

Declared in <bslstl_unorderedmultiset.h>

Remove from this unordered multiset the value_type object at the specified position, and return an iterator referring to the element immediately following the removed element, or to the past‐the‐end position if the removed element was the last element in the sequence of elements maintained by this unordered multiset. This method invalidates only iterators and references to the removed element and previously saved values of the end() iterator, and preserves the relative order of the elements not removed. The behavior is undefined unless position refers to a value_type object in this unordered multiset.

Remove from this unordered multiset all value_type objects that are equivalent to the specified key, if they exist, and return the number of object erased; otherwise, if there are no value_type objects equivalent to key, return 0 with no other effect. This method invalidates only iterators and references to the removed element and previously saved values of the end() iterator, and preserves the relative order of the elements not removed.

Same as the preceding overload, using a transparent key type.

template<class t_KEY>
size_type
erase(t_KEY&& key)
requires BloombergLP::bslmf::IsTransparentPredicate<HASH, t_KEY>::value &&
        BloombergLP::bslmf::IsTransparentPredicate<EQUAL,t_KEY>::value &&
        !is_convertible<BSLS_COMPILERFEATURES_FORWARD_REF(t_KEY),
                        iterator>::value &&
        !is_convertible<BSLS_COMPILERFEATURES_FORWARD_REF(t_KEY),
                        const_iterator>::value;

Remove from unordered multiset the value_type objects starting at the specified first position up to, but not including the specified last position, and return last. This method invalidates only iterators and references to the removed element and previously saved values of the end() iterator, and preserves the relative order of the elements not removed. The behavior is undefined unless first and last either refer to elements in this unordered multiset or are the end iterator, and the first position is at or before the last position in the sequence provided by this container.

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