diff --git a/src/syntaxer.cpp b/src/syntaxer.cpp
index b281468..0468afc 100644
--- a/src/syntaxer.cpp
+++ b/src/syntaxer.cpp
@@ -5,14 +5,6 @@
 
 namespace Syntax {
 
-#if 0
-struct OpImportance
-{
-	//int pos;
-	int prio;
-};
-#endif
-
 #if 0
 std::vector<SyntaxIssue> check_syntax(std::vector<Expression::Token>& tv);
 {
@@ -21,7 +13,8 @@ std::vector<SyntaxIssue> check_syntax(std::vector<Expression::Token>& tv);
 #endif
 
 
-// get mop = Math OPerator index
+// get mop = Math OPerator location (=absolute index in std::vector<Expression::Token>)
+// mapper of 'priority vector index' -> 'token vector index'
 static int get_mop_location(const std::vector<Expression::Token>& v, int position)
 {
 	int i = 0, l = v.size(), p = -1;