'help' command test

src/logic/CommandsInterpreter.cpp

@@ -138,7 +138,7 @@ public:
         return Argument {name, type, optional, def, origin, enumname};
     }
 
-    Command parseScheme(executor_func executor) {
+    Command parseScheme(executor_func executor, std::string_view description) {
         std::string name = parseIdentifier(true);
         std::vector<Argument> args;
         std::unordered_map<std::string, Argument> kwargs;
@@ -154,7 +154,10 @@ public:
                 args.push_back(parseArgument());
             }
         }
-        return Command(name, std::move(args), std::move(kwargs), executor);
+        return Command(
+            name, std::move(args), std::move(kwargs),
+             std::string(description), executor
+        );
     }
 
     inline parsing_error argumentError(
@@ -368,18 +371,24 @@ public:
         while (auto arg = command->getArgument(arg_index++)) {
             if (!arg->optional) {
                 throw error("missing argument "+util::quote(arg->name));
+            } else {
+                args->put(arg->def);
             }
         }
         return Prompt {command, args, kwargs};
     }
 };
 
-Command Command::create(std::string_view scheme, executor_func executor) {
-    return CommandParser("<string>", scheme).parseScheme(executor);
+Command Command::create(std::string_view scheme, std::string_view description, executor_func executor) {
+    return CommandParser("<string>", scheme).parseScheme(executor, description);
 }
 
-void CommandsRepository::add(std::string_view scheme, executor_func executor) {
-    Command command = Command::create(scheme, executor);
+void CommandsRepository::add(
+    std::string_view scheme, 
+    std::string_view description, 
+    executor_func executor
+) {
+    Command command = Command::create(scheme, description, executor);
     commands[command.getName()] = command;
 }