Modify luaconsole to use slash-command syntax

luprex/core/cpp/luaconsole.cpp

@@ -4,10 +4,6 @@
 #include "util.hpp"
 #include <iostream>
 
-static bool is_single_letter(const std::string &s) {
-    return ((s.size() == 1) && (s[0] >= 'a') && (s[0] <= 'z'));
-}
-
 LuaConsole::LuaConsole() {
     lua_state_ = luaL_newstate();
     clear_raw_input();
@@ -57,16 +53,11 @@ void LuaConsole::add(std::string line) {
     lines_ += 1;
     prompt_ = ">> ";
 
-    // Try to interpret it as a special command.
-    if (lines_ == 1) {
-        StringVec words = split_words(raw_input_);
-        if (words.size() >= 1) {
-            if (is_single_letter(words[0]) || (util::validinteger(words[0]))) {
-                words_ = words;
-                clear_raw_input();
-                return;
-            }
-        }
+    // Try to interpret it as a slash-command.
+    if ((lines_ == 1)&&(raw_input_[0] == '/')) {
+        words_ = split_words(raw_input_.substr(1));
+        clear_raw_input();
+        return;
     }
 
     // Translate lua expression with leading '=' to 'return'