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Questions tagged [boost-multi-index]

A C++ library which enables the construction of containers maintaining one or more indices with different sorting and access semantics.

248 questions
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How to erase in Boost multi_index composite keys?

I was checking on this Boost multi_index composite keys using MEM_FUN Can someone tell me how to implement erase function for this example ? Now I am doing Name_set_by_last::iterator mitchells =…
Dev
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deleting from a Boost MultiIndex

I have a boost multi-index structure that keeps boost::shared_ptr to instances of a class A. When I use the "find" function of one of the index, I get an iterator "it" from which I can get back the actual pointer through A* a = it->get();. How can I…
sunmat
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Problem using boost::multi_index with composite key member functions

I have the following container: using KeyValue = mutable_pair; using MyContainer = boost::multi_index_container< KeyValue, boost::multi_index::indexed_by< boost::multi_index::hashed_unique< …
Santiago
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How to release boost::interprocess::named_mutex when the process crashes

I used boost::interprocess to create a boost::multi_index data structure in shared memory. There are many client processes that will access this data structure. When accessing, I will lock the data structure. The problem I encountered is Once the…
ben
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Getting around Boost Multi-Index container's constant elements

I have some data class which is expensive to copy, but must be mutable, as it is frequently updated according to events. I also need a multi-index container to hold many such classes. I'm trying to set it up using boost::multi_index. For…
bavaza
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Get values from a boost::multi_index

I have created a boost::multi_index successfully and inserted values too. I have two hashed indices to the multi_index. Both are member functions, but one is unique and the other one is non-unique. I am trying to figure out the way to get the…
codeworks
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Is it possible to make multi_index container use contiguous memory?

Here I have a simple multi_index container and I wonder if there is any way of forcing the multi_index to allocate the elements contiguously in memory. I thought that this would be possible if the main index is random_access. However this simple…
alfC
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How to use boost::object_pool as a boost::multi_index allocator?

I am trying to implement a boost::multi_index application and performance is very bad: inserting 10,000 objects takes almost 0.1 second and it is not acceptable. So when I look into the documentation and found that boost::multi_index could accept a…
loudking
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The difference between modify and modify_key in boost multi_index_container

What is the difference between modify and modify_key in boost multi_index_container. I read their documentation both and I can't seem to find the difference between the usages of both. Link to the documentation
mkmostafa
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Iterator for boost multi-index when the KEY is boost::optional parameter

#include using namespace std; #include #include #include #include #include #include…
mahesh gs
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Can we use boost::multi_index::multi_index_container as a multiindex map?

I'm using boost::multi_index::multi_index_container<> of boost library. I want to store the values related to each element present in this container. Can we modify this container to use a multimap as well as it will be used as multi index container?
BSalunke
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boost::multi_index_container: Take equal_range from arbitrary index, implement loop only once

I have a multi_index_container that looks basically like this: struct MyStruct { int a, b, c; }; struct Tag1; struct Tag2; typedef multi_index_container< MyStruct, indexed_by< hashed_non_unique< tag, composite_key< …
phkoester
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Simulating functionality of sql (or other rdbms) using stl/boost algorithms and containers

I've been using stl for a while but i'm just getting to know sql. Can sql functionality be simulated using stl/boost containers and algorithms? if not, where do the limitations start? for example, I could create a database by simply using…
kirill_igum
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Boost multi_index_container partial index search based on results of partial_index_search

To illustrate my question, I copied below code from the "Phonebook" example of Boost help doc. struct phonebook_entry { std::string family_name; std::string given_name; std::string ssn; std::string phone_number; } And I can do a partial…
Michael
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