made local variable names case-insensitive

components/compiler/parser.cpp

@@ -1,6 +1,9 @@
 
 #include "parser.hpp"
 
+#include <cctype>
+#include <algorithm>
+
 #include "errorhandler.hpp"
 #include "exception.hpp"
 
@@ -50,6 +53,16 @@ namespace Compiler
         return mContext;
     }
 
+    std::string Parser::toLower (const std::string& name)
+    {
+        std::string lowerCase;
+        
+        std::transform (name.begin(), name.end(), std::back_inserter (lowerCase),
+            (int(*)(int)) std::tolower);
+            
+        return lowerCase;
+    }
+
     Parser::Parser (ErrorHandler& errorHandler, Context& context)
     : mErrorHandler (errorHandler), mContext (context)
     {}