• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 276
  • Last Modified:

How do I retrieve a value from a boost::bimap by key in VS C++?

Hi:

First time using boost::bimap.

I have constructed the following typedef:
typedef boost::bimap<std::basic_string<TCHAR>, int> argvType;

I load values into the bimap:
argvType arguments;

for (int index = 0; index < argc; index++)
{
      arguments.insert(argvType::value_type(argv[index], index));
}

How do I retrieve a value from the bimap assuming I'm using the following key:
std::basic_string<TCHAR> fileIn = L"foo";

I want to retrieve the string value in the map associated with the key.
I know there's probably better ways to do this, but I'd like to stick with
the implementation I've started.

I would think I should be able to use a [] operator or a get().
How do this?

Thanks,
JohnB
0
jxbma
Asked:
jxbma
  • 3
  • 2
2 Solutions
 
jkrCommented:
You need to use one 'view' of your bimap to do the lookup, i.e.

argvType::iterator it = argument.right.find(fileIn);

Open in new window


Also check out this decent tutorial about using bimaps: http://mybyteofcode.blogspot.de/2010/02/representing-bidirectional-relationship.html ("Representing bidirectional relationship with boost::bimap")
0
 
jxbmaSoftware ConsultantAuthor Commented:
Mmm....
I think I'm missing something there.

I get the following compilation error:
Error	138	error C2440: 'initializing' : cannot convert from 'boost::bimaps::detail::map_view_iterator<Tag,BimapType>' 
o 'boost::bimaps::detail::set_view_iterator<boost::multi_index::detail::bidir_node_iterator
<boost::multi_index::detail::ordered_index_node<Super>>>'	
c:\affectiva\source\affdex-windows-sdk\affdexfacewindowssdkconsoleapp\affdex-console-app.cpp	97

Open in new window

0
 
jxbmaSoftware ConsultantAuthor Commented:
All I really want to do is to retrieve the "value" at that key if it exists.
Not clear to me yet how to do that.
0
What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

 
jkrCommented:
Ooops, sorry, should have been

argvType::right_map::iterator it = argument.right.find(fileIn);

Open in new window

0
 
phoffricCommented:
A good lecture on bimap starting at at 34:50
https://www.youtube.com/watch?v=FM-fUjhoCp0
0
 
jxbmaSoftware ConsultantAuthor Commented:
Mmmm...
Still missing something here.

std::basic_string<TCHAR> fileIn = L"-f";
argvType::right_map::iterator it = arguments.right.find(fileIn);

Open in new window


still produces:
Error      141      error C2664: 'int boost::bimaps::container_adaptor::detail::key_to_base_identity<int,KeyType>::operator ()(Key &) const' : cannot convert argument 1 from 'const std::basic_string<wchar_t,std::char_traits<wchar_t>,std::allocator<wchar_t>>' to 'const int &'      c:\boost\include\boost\bimap\container_adaptor\associative_container_adaptor.hpp      194
Error      142      error C2780: 'boost::multi_index::detail::bidir_node_iterator<boost::multi_index::detail::ordered_index_node<Super>> boost::multi_index::detail::ordered_index<boost::multi_index::member<boost::bimaps::relation::detail::relation_storage<TA,TB,true>,int,pointer-to-member(0x1c)>,std::less<int>,SuperMeta,boost::mpl::vector1<T0>,boost::multi_index::detail::ordered_unique_tag>::find(const CompatibleKey &,const CompatibleCompare &) const' : expects 2 arguments - 1 provided      c:\boost\include\boost\bimap\container_adaptor\associative_container_adaptor.hpp      195
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

  • 3
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now