erase overloads

Synopses

Declared in <bslstl_unorderedmap.h>

Remove from this unordered map 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 map. 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 map.

iterator
erase(const_iterator position);

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Remove from this unordered map the value_type object at the specified position, and return an iterator referring to the element immediately following the removed element. The behavior is undefined unless position refers to a value_type object in this unordered map.

iterator
erase(iterator position);

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Remove from this unordered map the value_type object having the specified key, if it exists, and return 1; otherwise (there is no object with a key equivalent to key in this unordered map) 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.

size_type
erase(key_type const& key);

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Remove from this unordered map the value_type object having a key equivalent to the specified key, if it exists, and return 1; otherwise return 0 with no other effect. This overload participates in overload resolution only when the hasher and comparator are transparent. 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.

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;

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Remove from this unordered map 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 map or are the end iterator, and the first position is at or before the last position in the iteration sequence provided by this container.

iterator
erase(
    const_iterator first,
    const_iterator last);

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