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'

luprex/core/cpp/luaconsole.hpp

@@ -10,19 +10,21 @@
 //    3. Add the line to the LuaConsole using 'add'.
 //    4. Get the command words using 'get_command'.
 //    5. If the command is empty, do nothing.
-//    6. If the command is nonempty, execute it and call 'clear'.
+//    6. If the command is nonempty, execute it.
 //
-// The 'words' returned by the luaconsole can be empty, meaning
-// that there's no command to execute.  If the words are nonempty,
-// then the first word is the command.  There are two hardwired
-// commands:
+// The LuaConsole expects you to type one of three things:
 //
-//    lua <expr> - execute a lua expression
-//    syntax <message> - print a syntax error message
+//   * Valid Lua Code.
+//   * Valid Lua Code preceded by '=' as shorthand for 'return'
+//   * A slash-command.
 //
-// If the first word is anything else, it means the user typed
-// that word on the command line.   It is up to you to interpret
-// such commands.
+// The 'get_command' returned by the luaconsole can be one of
+// the following:
+//
+//    empty vector   - still collecting input: do nothing.
+//    lua <expr>     - found a lua command: execute it as lua.
+//    syntax <words> - detected a syntax error: print the error.
+//    word word ...  - read a slash-command: execute the command.
 //
 //////////////////////////////////////////////////////