Just a quick heads-up that I've added a type for generic tuples to the codebase -- Inkscape::Util::Tuple.

It consists of a simple struct template and a constructor function template. Tuples may contain up to six elements of arbitrary types.

For example, a type for a two-element tuple containing an int and a char const * would be:

Tuple<int, char const *> blah;

Its constructor may optionally take initial values for its members:

Tuple<int, char const *> blah(1, "foo");

The first member is named a, the second b, and so on:

cout << blah.a /* int */ << blah.b /* string */ << endl;

Also, for creating anonymous tuple values, there is a convenient constructor function which infers the types for you:

tuple(5, "testing").b /* string "testing" */

To use tuples, #include "util/tuple.h".

n.b. employ 'using' if you don't want to have to spell out Inkscape::Util::Tuple and Inkscape::Util::tuple -- e.g.:

using Inkscape::Util::Tuple; using Inkscape::Util::tuple;

...but please keep 'using' out of header files! Inside class bodies is OK though.

Just thought you all might find tuples useful..

-mental