Properly link flecs library

engine/libs/flecs/examples/c/queries/wildcards/include/wildcards.h

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

engine/libs/flecs/examples/c/queries/wildcards/include/wildcards/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 WILDCARDS_BAKE_CONFIG_H
+#define WILDCARDS_BAKE_CONFIG_H
+
+/* Headers of public dependencies */
+#include <flecs.h>
+
+#endif
+

engine/libs/flecs/examples/c/queries/wildcards/project.json

@@ -0,0 +1,10 @@
+{
+    "id": "wildcards",
+    "type": "application",
+    "value": {
+        "use": [
+            "flecs"
+        ],
+        "public": false
+    }
+}

engine/libs/flecs/examples/c/queries/wildcards/src/main.c

@@ -0,0 +1,50 @@
+#include <wildcards.h>
+#include <stdio.h>
+
+// Queries can have wildcard terms that can match multiple instances of a
+// relationship or relationship target.
+
+typedef struct {
+    int amount;
+} Eats;
+
+int main(int argc, char *argv[]) {
+    ecs_world_t *ecs = ecs_init_w_args(argc, argv);
+
+    ECS_COMPONENT(ecs, Eats);
+    ECS_TAG(ecs, Apples);
+    ECS_TAG(ecs, Pears);
+
+    // Create a query that matches edible components
+    ecs_query_t *q = ecs_query(ecs, {
+        .filter.terms = {{ .id = ecs_pair(ecs_id(Eats), EcsWildcard ) }}
+    });
+
+    // Create a few entities that match the query
+    ecs_entity_t bob = ecs_new_entity(ecs, "Bob");
+    ecs_set_pair(ecs, bob, Eats, Apples, {10});
+    ecs_set_pair(ecs, bob, Eats, Pears, {5});
+
+    ecs_entity_t alice = ecs_new_entity(ecs, "Alice");
+    ecs_set_pair(ecs, alice, Eats, Apples, {4});
+
+    // Iterate the query
+    ecs_iter_t it = ecs_query_iter(ecs, q);
+    while (ecs_query_next(&it)) {
+        Eats *eats = ecs_field(&it, Eats, 1);
+        ecs_id_t pair = ecs_field_id(&it, 1);
+        ecs_entity_t food = ecs_pair_second(ecs, pair);
+
+        for (int i = 0; i < it.count; i ++) {
+            printf("%s eats %d %s\n", ecs_get_name(ecs, it.entities[i]),
+                eats[i].amount, ecs_get_name(ecs, food));
+        }
+    }
+
+    // Output:
+    //   Bob eats 10 Apples
+    //   Bob eats 5 Pears
+    //   Alice eats 4 Apples   
+
+    return ecs_fini(ecs);
+}