Data commit

Task/Named-parameters/C/named-parameters.c

@@ -0,0 +1,48 @@
+#include <stdio.h>
+
+// 1. Named parameters
+
+typedef struct { int x, y, z; } FTest_args;
+
+void FTest (FTest_args args) {
+	printf("x: %d, y: %d, z: %d\n", args.x, args.y, args.z);
+}
+
+#define FT(...) FTest((FTest_args){ __VA_ARGS__ })
+
+
+// 2. Default parameters
+
+#define DFT(...) FTest((FTest_args){ .x = 142, .y = 143, .z = 144, __VA_ARGS__ })
+
+
+// 3. Convenience wrapper to avoid accessing args as "args.name"
+
+void FTest2 (int x, int y, int z) {
+	printf("x: %d, y: %d, z: %d\n", x, y, z);
+}
+
+static inline void FTest2_default_wrapper (FTest_args args) {
+	return FTest2(args.x, args.y, args.z);
+}
+
+#define DF2(...) FTest2_default_wrapper((FTest_args){ .x = 142, .y = 143, .z = 144, __VA_ARGS__ })
+
+
+int main(int argc, char **argv)
+{
+	// Named parameters
+	FTest((FTest_args){ .y = 10 });
+	FTest((FTest_args){ .y = 10, .z = 42 });
+	FT( .z = 47, .y = 10, .x = 42 );
+
+	// Default parameters
+	DFT();
+	DFT( .z = 99 );
+
+	// Default parameters with wrapper
+	DF2();
+	DF2( .z = 99 );
+
+	return 0;
+}