Re: [Boost-users] [boost-users] boost assignment problem on non primitive type.

From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2007-08-17 06:09:53

chun ping wang skrev:
> Question 1.
> std::vector<Roles> vr;
> the constructor for Roles:
> enum Role { .....};
>  explicit Roles (const std::string& usr, const Role& r);
> How would I use boost::assign::list_of to assign a vector of Roles 
> instead of doing regular vector push_back.

vr = list_of<Roles>( "foo", Role1 )( "bar", Role2 );

> Question 2.
> Related.
> I have a Hash map i.e. boost::unordered_map<std::string, 
> compositionType> and i want to use boost::map_list_of how would i do that.

Does the normal way for maps not work?

> Question 3.
> trying to use operator += in boost::assignment i get error specifying 
> unknown types.
> typedef boost::function<std::vector<int>(std::vector<int>)> sortfunc;
> std::vector<sortfunc> function_list;
>     // quicksort random
>     function_list += (&quicksort<QSTYPE(RANDOM), int, std::vector>)
>     // quicksort median
>     (&quicksort<QSTYPE(MEDIAN), int, std::vector>) // error here.
>     // quicksort mediantriple
>     (&quicksort<QSTYPE(MEDIANTRIPLE), int, std::vector>)
>     // merge sort
>     (&mergesort<int, std::vector>)
>  // heap sort
>  (&heapsort<int, std::vector>)
>  // selection sort
>  (&selection_sort<int, std::vector>)
>  // standard sort
>  (&standard_sort<int, std::vector>); 

operator += requires a comma-separated list IIRC.

use push_back( function_list )(...)(...)

-Thorsten