From d6b4c7973633b820fd0038d52a87198a4f21c312 Mon Sep 17 00:00:00 2001
From: Celestino Amoroso <celestino.amoroso@gmail.com>
Date: Mon, 17 Jun 2024 09:05:23 +0200
Subject: [PATCH] operator-index.go: dict item access by generic keys
 implemented

---
 operator-index.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/operator-index.go b/operator-index.go
index 565029c..2888d9b 100644
--- a/operator-index.go
+++ b/operator-index.go
@@ -113,6 +113,16 @@ func evalIndex(ctx ExprContext, self *term) (v any, err error) {
 		default:
 			err = self.errIncompatibleTypes(leftValue, rightValue)
 		}
+	} else if IsDict(leftValue) {
+		var ok bool
+		var indexValue any
+		d := leftValue.(*DictType)
+		if indexValue, err = verifyKey(indexTerm, indexList); err == nil {
+			if v, ok = (*d)[indexValue]; !ok {
+				err = indexTerm.Errorf("key %v does not belong to the dictionary", rightValue)
+			}
+		}
+	
 	}
 	return
 }