Add static network

examples/10_static_hello_pipeline/main.cpp

@@ -0,0 +1,34 @@
+// Example 10 — Static Hello Pipeline
+//
+// The same linear pipeline as example 01, built with make_network() instead
+// of the runtime Network builder. The topology is fully known at compile time:
+// cycle detection is a static_assert, no build() step is needed, and start/stop
+// require no virtual dispatch through a string-keyed node map.
+//
+//  [produce] --int--> [double_it] --int--> [print_it]
+
+#include <kpn/kpn.hpp>
+#include <chrono>
+#include <iostream>
+#include <thread>
+
+static int  produce()        { return 42; }
+static int  double_it(int x) { return x * 2; }
+static void print_it(int x)  { std::cout << "result: " << x << '\n'; }
+
+int main() {
+    using namespace kpn;
+
+    auto src  = make_node<produce,   "src" >(5);
+    auto dbl  = make_node<double_it, "dbl" >(5);
+    auto sink = make_node<print_it,  "sink">(5);
+
+    auto net = make_network(
+        edge(src.output<0>(),  dbl.input<0>()),
+        edge(dbl.output<0>(),  sink.input<0>())
+    );
+
+    net.start();
+    std::this_thread::sleep_for(std::chrono::milliseconds(100));
+    net.stop();
+}