Data commit

Task/Logical-operations/D/logical-operations.d

@@ -0,0 +1,33 @@
+import std.stdio;
+
+void logic(T, U)(T lhs, U rhs) {
+    writefln("'%s' is of type '%s', '%s' is of type '%s';",
+             lhs, typeid(typeof(lhs)), rhs,typeid(typeof(rhs)));
+    writefln("\t'%s' AND '%s' is %s, ", lhs, rhs, lhs && rhs);
+    writefln("\t'%s' OR '%s' is %s, ", lhs, rhs, lhs || rhs);
+    writefln("\tNOT '%s' is %s.\n", lhs, !lhs);
+}
+
+class C { int value; }
+
+void main() {
+    bool theTruth = true;
+    bool theLie = false;
+    real zeroReal = 0.0L;
+    real NaN; // D initializes floating point values to NaN
+    int zeroInt  = 0;
+    real[] nullArr = null;
+    string emptyStr = "";
+    string nullStr = null;
+    C someC = new C;
+    C nullC = null;
+
+    // Note: Struct is value type in D, but composite
+    //  so no default bool equivalent.
+
+    logic(theTruth, theLie);
+    logic(zeroReal, NaN);
+    logic(zeroInt, nullArr);
+    logic(nullStr, emptyStr);
+    logic(someC, nullC);
+}