move error formating to Printer

hscript/Expr.hx

@@ -95,39 +95,8 @@ class Error {
 		this.origin = origin;
 		this.line = line;
 	}
-
-	private function errorDefToString(): String {
-		switch (e) {
-			case EInvalidChar(c):
-				return "Invalid character: '"+String.fromCharCode(c)+"' ("+c+")";
-
-			case EUnexpected(s):
-				return "Unexpected token: \""+s+"\"";
-
-			case EUnterminatedString:
-				return "Unterminated string";
-
-			case EUnterminatedComment:
-				return "Unterminated comment";
-
-			case EUnknownVariable(v):
-				return "Unknown variable: "+v;
-
-			case EInvalidIterator(v):
-				return "Invalid iterator: "+v;
-
-			case EInvalidOp(op):
-				return "Invalid operator: "+op;
-
-			case EInvalidAccess(f):
-				return "Invalid access to field "+f;
-		}
-	}
-
 	public function toString(): String {
-		var message = errorDefToString();
-		message = origin + ":" + line + ": " + message;
-		return message;
+		return Printer.errorToString(this);
 	}
 }
 enum ErrorDef {

hscript/Printer.hx

@@ -300,4 +300,23 @@ class Printer {
 		return new Printer().exprToString(e);
 	}
 
-}
+	public static function errorToString( e : Expr.Error ) {
+		var message = switch( #if hscriptPos e.e #else e #end ) {
+			case EInvalidChar(c): "Invalid character: '"+String.fromCharCode(c)+"' ("+c+")";
+			case EUnexpected(s): "Unexpected token: \""+s+"\"";
+			case EUnterminatedString: "Unterminated string";
+			case EUnterminatedComment: "Unterminated comment";
+			case EUnknownVariable(v): "Unknown variable: "+v;
+			case EInvalidIterator(v): "Invalid iterator: "+v;
+			case EInvalidOp(op): "Invalid operator: "+op;
+			case EInvalidAccess(f): "Invalid access to field "+f;
+		};
+		#if hscriptPos
+		return e.origin + ":" + e.line + ": " + message;
+		#else
+		return message;
+		#end
+	}
+
+
+}