Added comments - certain members of State depend on the current match, should be reset

nfa.go

@@ -28,7 +28,6 @@ type State struct {
 	transitions                map[int][]*State // Transitions to different states (maps a character (int representation) to a _list of states. This is useful if one character can lead multiple states eg. ab|aa)
 	isKleene                   bool             // Identifies whether current node is a 0-state representing Kleene star
 	assert                     assertType       // Type of assertion of current node - NONE means that the node doesn't assert anything
-	zeroMatchFound             bool             // Whether or not the state has been used for a zero-length match - only relevant for zero states
 	allChars                   bool             // Whether or not the state represents all characters (eg. a 'dot' metacharacter). A 'dot' node doesn't store any contents directly, as it would take up too much space
 	except                     []rune           // Only valid if allChars is true - match all characters _except_ the ones in this block. Useful for inverting character classes.
 	lookaroundRegex            string           // Only for lookaround states - Contents of the regex that the lookaround state holds
@@ -37,7 +36,9 @@ type State struct {
 	groupBegin                 bool             // Whether or not the node starts a capturing group
 	groupEnd                   bool             // Whether or not the node ends a capturing group
 	groupNum                   int              // Which capturing group the node starts / ends
-	threadGroups               []Group          // Assuming that a state is part of a 'thread' in the matching process, this array stores the indices of capturing groups in the current thread. As matches are found for this state, its groups will be copied over.
+	// The following properties depend on the current match - I should think about resetting them for every match.
+	zeroMatchFound bool    // Whether or not the state has been used for a zero-length match - only relevant for zero states
+	threadGroups   []Group // Assuming that a state is part of a 'thread' in the matching process, this array stores the indices of capturing groups in the current thread. As matches are found for this state, its groups will be copied over.
 }
 
 // Clones the NFA starting from the given state.