Lars Gullik Bjønnes wrote:
> This patch is really only what is left of the old iterator patch
> series. And basically all the stuff that was dependant upon boost
> 1.31.0.
>
> I am not sure about the functor stuff herein, but the iterator
> adaptor usage seems nice to me. Also the boost::next change is IMHO
> good. (the deref is horrible, and I'll never apply that one...)
> So if you have comments to this patch likes/dislikes I'd be happy to
> receive them...
- vector<string> nvec;
- std::copy(bstore.begin(), bstore.end(),
- lyx::back_inserter_fun(nvec, &Buffer::fileName));
+ vector<string> nvec(
+ make_transform_iterator(bstore.begin(),
+ bind(&Buffer::fileName, _1)),
+ make_transform_iterator(bstore.end(),
+ bind(&Buffer::fileName, _1))
+ );
It's not exactly readable is it ;-)
I've been using Boost.Spirit a lot at work recently and so have
become quite comfortable with Spirit's phoenix library (a better
lambda?)
Try this for size:
#include <boost/spirit/phoenix.hpp>
#include <iostream>
#include <string>
#include <vector>
struct Buffer {
Buffer(std::string const & name) : name_(name) {}
std::string const & name() const { return name_; }
private:
std::string name_;
};
char const * const names[] = { "angus", "ben", "chris", "dave" };
int const size_names = sizeof(names) / sizeof(names[0]);
int main () {
using phoenix::arg1;
using phoenix::bind;
using phoenix::var;
std::vector<Buffer> bstore(names, names + size_names);
std::vector<std::string> nvec(bstore.size());
std::vector<std::string>::iterator nvit = nvec.begin();
std::for_each(bstore.begin(), bstore.end(),
(*var(nvit) = bind(&Buffer::name)(arg1),
var(nvit)++));
std::for_each(nvec.begin(), nvec.end(),
std::cout << arg1 << ' ');
std::cout << std::endl;
}
--
Angus
