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A Tour of C++ for experienced programmers, as if C++26 is the only version that ever existed.
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546// PROSE‑ONLY GAP EXAMPLE – <rcu> preview// The RCU (Read‑Copy‑Update) library is not available in the current toolchain.// The following sketch shows typical usage when the header exists.
/*#include <rcu>#include <atomic>#include <thread>#include <vector>#include <iostream>
struct data { int value; // other fields …};
using rcu_ptr = rcu::rcu_ptr<data>;
rcu_ptr global_ptr;
void writer() { // Create a new version of the data. auto new_data = std::make_shared<data>(); new_data->value = 42; // Publish the new version atomically. global_ptr.store(new_data); // Wait for a grace period so that readers using the old version can finish. rcu::synchronize();}
void reader() { // Acquire a snapshot of the current data. auto snapshot = global_ptr.load(); // Use the data without further synchronization. std::cout << "value = " << snapshot->value << "\n";}
int main() { std::thread w(writer); std::thread r(reader); w.join(); r.join(); return 0;}*/