Properly link flecs library

engine/libs/flecs/examples/cpp/reflection/units/include/units.h

@@ -0,0 +1,16 @@
+#ifndef UNITS_H
+#define UNITS_H
+
+/* This generated file contains includes for project dependencies */
+#include "units/bake_config.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+

engine/libs/flecs/examples/cpp/reflection/units/include/units/bake_config.h

@@ -0,0 +1,24 @@
+/*
+                                   )
+                                  (.)
+                                  .|.
+                                  | |
+                              _.--| |--._
+                           .-';  ;`-'& ; `&.
+                          \   &  ;    &   &_/
+                           |"""---...---"""|
+                           \ | | | | | | | /
+                            `---.|.|.|.---'
+
+ * This file is generated by bake.lang.c for your convenience. Headers of
+ * dependencies will automatically show up in this file. Include bake_config.h
+ * in your main project file. Do not edit! */
+
+#ifndef UNITS_BAKE_CONFIG_H
+#define UNITS_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include <flecs.h>
+
+#endif
+

engine/libs/flecs/examples/cpp/reflection/units/project.json

@@ -0,0 +1,11 @@
+{
+    "id": "units",
+    "type": "application",
+    "value": {
+        "use": [
+            "flecs"
+        ],
+        "language": "c++",
+        "public": false
+    }
+}

engine/libs/flecs/examples/cpp/reflection/units/src/main.cpp

@@ -0,0 +1,50 @@
+#include <units.h>
+#include <iostream>
+
+struct WeatherStation {
+    double temperature;
+    double pressure;
+    double precipitation;
+};
+
+void print_value(const flecs::cursor& cur) {
+    // Get unit entity and component
+    flecs::entity u = cur.get_unit();
+    const flecs::Unit *u_data = u.get<flecs::Unit>();
+
+    // Print value with unit symbol
+    std::cout << cur.get_member() << ": " << cur.get_float() 
+        << " " << u_data->symbol << "\n";
+}
+
+int main(int, char *[]) {
+    flecs::world ecs;
+
+    // Import units module.
+    ecs.import<flecs::units>();
+
+    // Register reflection data with units. This can improve the way information
+    // is visualized in tools, such as the explorer.
+    ecs.component<WeatherStation>()
+        .member<double, flecs::units::temperature::Celsius>("temperature")
+        .member<double, flecs::units::pressure::Bar>("pressure")
+        .member<double, flecs::units::length::MilliMeters>("precipitation");
+
+    flecs::entity e = ecs.entity().set<WeatherStation>({24, 1.2, 0.5});
+
+    // Use cursor API to print values with units
+    WeatherStation *ptr = e.get_mut<WeatherStation>();
+    flecs::cursor cur = ecs.cursor<WeatherStation>(ptr);
+    cur.push();
+    print_value(cur);
+    cur.next();
+    print_value(cur);
+    cur.next();
+    print_value(cur);
+    cur.pop();
+
+    // Output:
+    //  temperature: 24 °C
+    //  pressure: 1.2 bar
+    //  precipitation: 0.5 mm
+}