I have started using boost::assign
for cases that I want to statically assign specific values (examples lifted from link above).
#include <boost/assign/std/vector.hpp>
using namespace boost::assign; // bring 'operator+()' into scope
{
vector<int> values;
values += 1,2,3,4,5,6,7,8,9;
}
You can also use boost::assign
for maps.
#include <boost/assign/list_inserter.hpp>
#include <string>
using boost::assign;
std::map<std::string, int> months;
insert( months )
( "january", 31 )( "february", 28 )
( "march", 31 )( "april", 30 )
( "may", 31 )( "june", 30 )
( "july", 31 )( "august", 31 )
( "september", 30 )( "october", 31 )
( "november", 30 )( "december", 31 );
You can allow do direct assignment with list_of()
and map_list_of()
#include <boost/assign/list_of.hpp> // for 'list_of()'
#include <list>
#include <stack>
#include <string>
#include <map>
using namespace std;
using namespace boost::assign; // bring 'list_of()' into scope
{
const list<int> primes = list_of(2)(3)(5)(7)(11);
const stack<string> names = list_of( "Mr. Foo" )( "Mr. Bar")
( "Mrs. FooBar" ).to_adapter();
map<int,int> next = map_list_of(1,2)(2,3)(3,4)(4,5)(5,6);
// or we can use 'list_of()' by specifying what type
// the list consists of
next = list_of< pair<int,int> >(6,7)(7,8)(8,9);
}
There are also functions for repeat()
, repeat_fun()
, and range()
which allows you to add repeating values or ranges of values.