feat: add start column and end column to position struct

pkg/position/position.go

@@ -1,19 +1,64 @@
 package position
 
+// Tests that were written before the addition of StartCol and EndCol can set this to false,
+// Which will not check if StartCol or EndCol are equal in the Equal function.
+var CheckColEquality = true
+
 // Position represents node position
 type Position struct {
 	StartLine int
 	EndLine   int
+	StartCol  int
+	EndCol    int
 	StartPos  int
 	EndPos    int
 }
 
 // NewPosition Position constructor
-func NewPosition(StartLine int, EndLine int, StartPos int, EndPos int) *Position {
+func NewPosition(
+	StartLine int,
+	EndLine int,
+	StartPos int,
+	EndPos int,
+	StartCol int,
+	EndCol int,
+) *Position {
 	return &Position{
 		StartLine: StartLine,
 		EndLine:   EndLine,
 		StartPos:  StartPos,
 		EndPos:    EndPos,
+		StartCol:  StartCol,
+		EndCol:    EndCol,
 	}
 }
+
+func (p Position) Equal(other Position) bool {
+	if p.StartLine != other.StartLine {
+		return false
+	}
+
+	if p.StartPos != other.StartPos {
+		return false
+	}
+
+	if p.EndLine != other.EndLine {
+		return false
+	}
+
+	if p.EndPos != other.EndPos {
+		return false
+	}
+
+	if CheckColEquality {
+		if p.StartCol != other.StartCol {
+			return false
+		}
+
+		if p.EndCol != other.EndCol {
+			return false
+		}
+	}
+
+	return true
+}