equal_range返回第N个索引的迭代器对。由于复合键不是唯一的，因此您将获得满足指定条件的元素范围。要遍历该范围，您可以使用从第一个迭代器到第二个迭代器的循环。 考虑使用命名索引将它们用作 get<index_name>()，因为指定实际数字不是非常易读。count的语法与 equal_range类似：size_t cnt = hmap.get<3>...
It's been 11 years since first proposed, but here it is at last. I'm releasing a prereview of ranked indices for Boost.MultiIndex: struct person { int age; std::string name; }; typedef multi_index_container< person, indexed_by< ranked_non_unique<member<person,int,&person::age> >, ...
This is when you need Boost MultiIndex.It’s helpful to think of your collection (when implemented with Boost MultiIndex) as a database table.You can specify multiple indices (even using “composite keys” of more than one member) into one set of data, and query it in multiple ways. Hope...
C_ITER_FEE_INCRE>;usingC_ITER_ID_FEE_INCRE = MultiIndexFeeIncre::index<tagGoodsID>::type::const_iterator;usingC_ITER_GROUP_FEE_INCRE = MultiIndexFeeIncre::index<tagGoodsGroupID>::type::const_iterator;usingPAIR_RANGE_GROUP_FEE_INCRE = std::pair<...
6 第五节：关联性索引 hashed_unqiue和hashed_non_unqiueindextemplate<typenameKeyFromValue,typenameHash=boost::hash<KeyFromValue::result_type>,typenamePred=std::equal_to<KeyFromValue::result_type>>struct(hashed_unique|hashed_non_unique);template<typenameTagList,typenameKeyFromValue,typenameHash=boost::...
我们知道，在 ES 中，字段类型如果是keyword，那么在搜索的时候一般只能整体搜索，不支持搜索部分内容。