Question

Is there an algorithm or helper method in the boost library to search a vector of boost::tuple objects? Here is my code:

typedef boost::tuple<int, char const*, char const*> Tuple;
typedef std::vector<Tuple> ErrorStringMap;

ErrorStringMap mystrings = tuple_list_of
    (10, "10", "ten") 
    (20, "20", "twenty") 
    (30, "30", "thirty") 
    (40, "40", "fourty");

I want to search the vector of tuples and find the first tuple with the value 20 as the first element in the tuple. I want to access that tuple’s 2nd and 3rd elements.

Answer 1

ildjarn answered this in the list of comments below my question, however he did not post as an answer, so I will do it for him:

Phoenix’s placeholders are in boost::phoenix::placeholders. Also, if
you’re using Phoenix, you don’t need bind for this — with the proper
includes, at_c<0>(_1) == 20 works.