How can I Iterate Through Structure Members in C using Boost Fusion/Phoenix?

Iterating over Structure Members in C

Given a structure, you can iterate through its members to retrieve and print their values. Here's a C solution using Boost Fusion/Phoenix:

<code class="cpp">#include <boost/fusion/adapted/struct.hpp>
#include <boost/fusion/include/for_each.hpp>
#include <boost/phoenix/phoenix.hpp>
using boost::phoenix::arg_names::arg1;

struct A {
    int a;
    int b;
    std::string c;
};

BOOST_FUSION_ADAPT_STRUCT(A, (int, a)(int, b)(std::string, c));

void print_struct_value(A* a) {
    boost::fusion::for_each(
        *a,
        std::cout << arg1 << "\n");
}</code>

Alternatively, recent versions of Boost allow for C 11 type deduction:

<code class="cpp">BOOST_FUSION_ADAPT_STRUCT(A, a, b, c);</code>

To use this function, simply pass a pointer to your structure:

<code class="cpp">A my_struct = { 1, 42, "Sample String" };
print_struct_value(&my_struct);</code>

This will print the values of each member:

1
42
Sample String

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