source for tut3

lazproj/test/src/interactive.command.interpreter.d

@@ -0,0 +1,44 @@
+module interactive.command.interpreter;
+
+import std.stdio;
+import std.array;
+
+string[] arguments;
+string command;
+void function()[string] dispatcher;
+
+static this(){
+    dispatcher["hello"] = &hello;
+    dispatcher["showargs"] = &showArgs;
+}
+
+void showArgs(){
+    foreach(arg;arguments) writeln(arg);
+}
+void hello(){
+    writeln("hello world");
+}
+
+void main(string args[])
+{
+    string input;    
+    while (true)  
+    {
+        input = readln;
+        if (input == "exit\n") return;
+        // split command and args
+        auto s = split(input);
+        if (s.length){
+            command = s[0];
+            if (s.length > 1)
+                arguments = s[1..$];
+            else
+                arguments.length = 0;   
+            if (command in dispatcher)
+                dispatcher[command]();
+            else
+                writeln("unrecognized command: ", command);
+            stdout.flush;
+        }
+    }
+}