Data commit

Task/Pointers-and-references/D/pointers-and-references.d

@@ -0,0 +1,28 @@
+void main() {
+    // Take the address of 'var' and placing it in a pointer:
+    int var;
+    int* ptr = &var;
+
+    // Take the pointer to the first item of an array:
+    int[10] data;
+    auto p2 = data.ptr;
+
+
+    // Depending on variable type, D will automatically pass either
+    // by value or reference.
+    // By value: structs, statically sized arrays, and other
+    //           primitives (int, char, etc...);
+    // By reference: classes;
+    // By kind of reference: dynamically sized arrays, array slices.
+
+    struct S {}
+    class C {}
+
+    void foo1(S s) {}        // By value.
+    void foo2(C c) {}        // By reference.
+    void foo3(int i) {}      // By value.
+    void foo4(int[4] i) {}   // By value (unlike C).
+    void foo6(int[] i) {}    // Just length-pointer struct by value.
+    void foo5(T)(ref T t) {} // By reference regardless of what type
+                             // T really is.
+}