Add lambda emulation

engine/tests/CMakeLists.txt

@@ -14,6 +14,9 @@ target_link_libraries(ecs_defer_test LINK_PRIVATE Breeze)
 add_executable(heap_test heap_test.c)
 target_link_libraries(heap_test LINK_PRIVATE Breeze)
 
+add_executable(lambda_test lambda_test.c)
+target_link_libraries(lambda_test LINK_PRIVATE Breeze)
+
 add_executable(array_test array_test.c)
 target_link_libraries(array_test LINK_PRIVATE Breeze)
 

engine/tests/lambda_test.c

@@ -0,0 +1,42 @@
+#include <stdio.h>
+#include <breeze.h>
+
+int BZ_LAMBDA_DECL(lambdaAdd, int a) {
+    BZ_LAMBDA_UNPACK_START();
+    BZ_LAMBDA_UNPACK(int, x); // still have access to x
+
+    return a + x;
+}
+
+void BZ_LAMBDA_NOP_DECL(printArgs) {
+    BZ_LAMBDA_UNPACK_START();
+    BZ_LAMBDA_UNPACK(int, argc);
+    BZ_LAMBDA_UNPACK(char **, argv);
+
+    printf("Program arguments:\n");
+    for (int i = 0; i < argc; i++) {
+        printf("\t%s\n", argv[i]);
+    }
+}
+
+BzLambda foo(int x) {
+    BzLambda lam = BZ_LAMBDA(lambdaAdd);
+    BZ_LAMBDA_BEGIN_CAPTURE(&lam);
+    BZ_LAMBDA_CAPTURE(&lam, x);
+    // x goes out of scope
+    return lam;
+}
+
+int main(int argc, char **argv) {
+
+    BzLambda lambda1 = foo(8);
+    printf("%d\n", BZ_LAMBDA_CALL(&lambda1, int, 1));
+
+    BzLambda printLam = BZ_LAMBDA(printArgs);
+    BZ_LAMBDA_BEGIN_CAPTURE(&printLam);
+    BZ_LAMBDA_CAPTURE(&printLam, argc);
+    BZ_LAMBDA_CAPTURE(&printLam, argv);
+    BZ_LAMBDA_NOP_CALL(&printLam, void);
+
+    return 0;
+}