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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.

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How to iterate through the indices of a Boost Multi_index container?

I have a boost::multi_index::multi_index_container container having six different ordered_non_unique indices. The idea is to be able to sort the data along these six indices (as a means of ranking solutions using multiple criteria). The issue I'm…
TCSGrad
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How to find all matches boost::multi_index with a key?

I have a boost::multi_index container. Could anybody tell me how to retrieve a range of iterators based on a certain key? After hours of search I got the idea that lower_bound or upper_bound should do the trick but I still do not got an example. In…
loudking
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Boost Multi-Index Composite Key for Multiple-Column Indexes

I have some records, pattern is (id, length, width); I want to search like "length in [10,20) and width in (20,30]"; If I use relational database, I could create a Multiple-Column Indexes on length and width. I need to do that job in memory. I see…
user3529280
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boost::multi_index_container with random_acces and hashed_unique

I'am trying to create container with both index and key access with unique keys: so here is my code: #include #include #include #include…
Jeka
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C++: Determine the class of a pointer type in the use of Boost MultiIndex

The answer to this question has general application, but I will motivate it with the following example: I have the following template class: template class Collection { public: struct id{}; struct name{}; // A collection…
unshul
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Iterating over a boost multi_index

SO. I am working with an igraph object and I want to iterate over vertices in a particular order. The order is determined by a vertex attribute called "value" and I'd like to operate highest-to-lowest. igraph can provide all of the values as an…
Brian Dolan
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Boost::multi_index with map

I have a question about modifying elements in boost::multi_index container. What I have is the structure, containing some pre-defined parameters and a number of parameters, which are defined at run-time, and stored in a map. Here is a simplified…
pausag
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partial_sort on boost multi_index's random access index

I was wondering if there is a way to use std::partial_sort or boost::partial_sort on multi_index's random access index. If I try to use std::patial_sort I get compiler errors implying that the iterator derefence is const therefore I cannot compile.…
Saif Ur Rehman
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How to store elements in boost::multi_index::multi_index_container?

I want to use multi index container of boost. To use it I tried following sample program to understand the insertion of elements in the container. Following is my code : #include #include #include…
BSalunke
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boost multi_index_container, range mutating algorithms and constness

I'm using boost multi_index_container, which is queried by equal_range and the result returned from the function using range::join and boost::any_range The any_range Reference argument is defined as const reference to the type - must be const…
kreuzerkrieg
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Shared memory size calculation c++

I am keeping two objects in shared memory, one of them is a class which is : class GlobalObj { public: unsigned int counter; unsigned int label; bool isExist; Globals(void){} ~Globals(void){}; }; And the other one is a…
Vecihi
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How do I replace an item in a multi index container without affecting the insertion order?

I have a multi index container with four indexes. One of the indexes is a random access index, used to maintain the insertion order. When a property on an element of the container is updated externally, I would like the relevant index to be updated.…
MM.
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Why can't `boost::multi_index replace` be used for pointer types?

Short answer: User modify instead, details in the accepted answer and also this answer I'm attempting to use a boost::multi_index_container holding a pointer type. It appears to me the replace function is broken, and am wondering what I am doing…
Zero
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boost multi_index_container broken indexes

I have a multi_index container. Chan::Ptr is a shared_pointer to the object. The container has two indexes with object functions. typedef multi_index_container< Chan::Ptr, indexed_by< …
sz9
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Sql IN analog in boost::multi_index

I use boost::multi_index and retrieve data like this: sample_set::index::type::iterator s, end; boost::tie(s,end) = samples.get().equal_range( boost::make_tuple( "Dress", "Red" )); This code retrieves all red dresses. Is there…
Alexander Ponomarev
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