Made the gats text parser much more robust.

1 files changed, 63 insertions, 3 deletions

diff --git a/c++-libbu++/src/object.h b/c++-libbu++/src/object.h
index e4da8de..a876061 100644
--- a/c++-libbu++/src/object.h
+++ b/c++-libbu++/src/object.h
@@ -48,9 +48,69 @@ namespace Gats
         static Object *strToGats( const Bu::String &sStr );
 
     private:
-        static Object *strToGats( Bu::String::const_iterator &i );
-        static Bu::String token( Bu::String::const_iterator &i );
-        static void skipWs( Bu::String::const_iterator &i );
+        class StrPos
+        {
+        public:
+            StrPos( const Bu::String::const_iterator &i ) :
+                i( i ), iLine( 1 ), iChar( 1 )
+            { }
+            Bu::String::const_iterator i;
+            int iLine;
+            int iChar;
+
+            char operator*()
+            {
+                return *i;
+            }
+            StrPos &operator++(int)
+            {
+                i++;
+                if( i )
+                {
+                    if( *i == '\n' )
+                    {
+                        iLine++;
+                        iChar = 0;
+                    }
+                    else
+                        iChar++;
+                }
+                return *this;
+            }
+            operator bool()
+            {
+                return i;
+            }
+        };
+
+        class Thrower : public Bu::String::FormatProxyEndAction
+        {
+        public:
+            Thrower( Gats::Object::StrPos &i ) :
+                i( i )
+            {
+            }
+
+            virtual ~Thrower()
+            {
+            }
+
+            virtual void operator()( const Bu::String &sFinal )
+            {
+                throw Bu::ExceptionBase(
+                    (Bu::String("%1: %2: ").arg(i.iLine).arg(i.iChar).end() + sFinal)
+                    .getStr()
+                    );
+            }
+
+        private:
+            Gats::Object::StrPos &i;
+        };
+
+        static Bu::String::FormatProxy posError( Gats::Object::StrPos &i, const Bu::String &msg );
+        static Object *strToGats( Gats::Object::StrPos &i );
+        static Bu::String token( Gats::Object::StrPos &i );
+        static void skipWs( Gats::Object::StrPos &i );
     };
 
     const char *typeToStr( Type t );