diff --git a/btparser/lexer.cpp b/btparser/lexer.cpp
index ff2ba19..fa01974 100644
--- a/btparser/lexer.cpp
+++ b/btparser/lexer.cpp
@@ -120,6 +120,22 @@ Lexer::Token Lexer::getToken(size_t & tokenLineIndex)
         return getToken(tokenLineIndex);
     }
 
+    //directive
+    if (mLastChar == '#')
+    {
+        tokenLineIndex = mState.LineIndex - 1;
+        std::string directive;
+        while (true)
+        {
+            nextChar();
+            if (mLastChar == EOF || mLastChar == '\r' || mLastChar == '\n')
+                break;
+            directive += (char)mLastChar;
+        }
+        mState.Directive = directive;
+        return tok_directive;
+    }
+
     //character literal
     if(mLastChar == '\'')
     {
@@ -186,7 +202,7 @@ Lexer::Token Lexer::getToken(size_t & tokenLineIndex)
                 else
                     return reportError(StringUtils::sprintf("invalid escape sequence \"\\%c\" in character literal", mLastChar));
             }
-            charLit += mLastChar;
+            charLit += (char)mLastChar;
         }
     }
 
@@ -258,19 +274,19 @@ Lexer::Token Lexer::getToken(size_t & tokenLineIndex)
     }
 
     //identifier/keyword
-    if(isalpha(mLastChar) || mLastChar == '_' || (mLastChar == ':' && peekChar() == ':')) //[a-zA-Z_]
+    if(isalpha(mLastChar) || mLastChar == '$' || mLastChar == '_' || (mLastChar == ':' && peekChar() == ':')) //[a-zA-Z$_]
     {
         tokenLineIndex = mState.LineIndex - 1;
-        mState.IdentifierStr = mLastChar;
+        mState.IdentifierStr = (char)mLastChar;
         if (mLastChar == ':') //consume the '::'
         {
             mState.IdentifierStr += ':';
             nextChar();
         }
         nextChar();
-        while(isalnum(mLastChar) || mLastChar == '_' || (mLastChar == ':' && peekChar() == ':')) //[0-9a-zA-Z_]
+        while(isalnum(mLastChar) || mLastChar == '_' || mLastChar == '$' || (mLastChar == ':' && peekChar() == ':')) //[0-9a-zA-Z$_]
         {
-            mState.IdentifierStr.push_back(mLastChar);
+            mState.IdentifierStr.push_back((char)mLastChar);
             if(mLastChar == ':') //consume the '::'
             {
                 mState.IdentifierStr += ':';
@@ -310,10 +326,10 @@ Lexer::Token Lexer::getToken(size_t & tokenLineIndex)
     if(isdigit(mLastChar)) //[0-9]
     {
         tokenLineIndex = mState.LineIndex - 1;
-        mNumStr = mLastChar;
+        mNumStr = (char)mLastChar;
 
         while(isdigit(nextChar())) //[0-9]*
-            mNumStr += mLastChar;
+            mNumStr += (char)mLastChar;
 
         auto error = convertNumber(mNumStr.c_str(), mState.NumberVal, 10);
         if(error)
@@ -478,6 +494,8 @@ std::string Lexer::TokString(const TokenState & ts)
         s = ts.CharLit;
         return StringUtils::sprintf("'%s'", StringUtils::Escape(s).c_str());
     }
+    case tok_directive:
+        return "#" + ts.Directive;
     default:
     {
         auto found = mReverseTokenMap.find(ts.Token);
diff --git a/btparser/lexer.h b/btparser/lexer.h
index 72fc439..e7ae2ea 100644
--- a/btparser/lexer.h
+++ b/btparser/lexer.h
@@ -22,10 +22,11 @@ public:
 #undef DEF_KEYWORD
 
         //others
-        tok_identifier, //[a-zA-Z_][a-zA-Z0-9_]
+        tok_identifier, //[a-zA-Z$_][a-zA-Z0-9$_]
         tok_number, //(0x[0-9a-fA-F]+)|([0-9]+)
         tok_stringlit, //"([^\\"]|\\([\\"'?abfnrtv0]|x[0-9a-fA-f]{2}))*"
         tok_charlit, //'([^\\]|\\([\\"'?abfnrtv0]|x[0-9a-fA-f]{2}))'
+        tok_directive, //#([^\r\n]+)
 
         //operators
 #define DEF_OP_TRIPLE(enumval, ch1, ch2, ch3) tok_##enumval,
@@ -46,6 +47,7 @@ public:
         std::string StringLit; //tok_stringlit
         char CharLit = '\0'; //tok_charlit
         std::string ErrorMessage; //tok_error
+        std::string Directive; //tok_directive
 
         size_t CurLine = 0;
         size_t LineIndex = 0;
@@ -68,6 +70,7 @@ public:
             StringLit.clear();
             CharLit = '\0';
             ErrorMessage.clear();
+            Directive.clear();
         }
 
         void Throw(const std::string& reason) const
diff --git a/btparser/preprocessor.cpp b/btparser/preprocessor.cpp
index cbcc400..78e7422 100644
--- a/btparser/preprocessor.cpp
+++ b/btparser/preprocessor.cpp
@@ -474,6 +474,11 @@ std::string preprocess(const std::string& input, std::string& error, const std::
 					//printf("#pragma once");
 					// TODO: implement something?
 				}
+				else if (type == "pack")
+				{
+					if (emitting())
+						final.push_back(line);
+				}
 				else
 				{
 					t.error("unsupported #pragma type '" + type + "'");