Boost C++ Application Development Cookbook - Second Edition

Manipulating a vector of types

The task of this recipe is to modify the content of one boost::mpl::vector function depending on the content of a second boost::mpl::vector function. We'll be calling the second vector as the vector of modifiers and each of those modifiers may have the following type:

// Make unsigned.
struct unsigne; // Not a typo: `unsigned` is a keyword, we can not use it.

// Make constant.
struct constant;

// Otherwise we do not change type.
struct no_change;

So, where shall we start from?