From 703ecf6829f940049231817fae77fb21adb682b3 Mon Sep 17 00:00:00 2001
From: Celestino Amoroso <celestino.amoroso@gmail.com>
Date: Mon, 17 Jun 2024 06:56:32 +0200
Subject: [PATCH] Added utility function GetLast() to context

---
 context.go      | 1 +
 simple-store.go | 8 +++++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/context.go b/context.go
index f263a3c..20ae49b 100644
--- a/context.go
+++ b/context.go
@@ -40,6 +40,7 @@ type ExprContext interface {
 	SetParent(ctx ExprContext)
 	GetParent() (ctx ExprContext)
 	GetVar(varName string) (value any, exists bool)
+	GetLast() any
 	SetVar(varName string, value any)
 	UnsafeSetVar(varName string, value any)
 	EnumVars(func(name string) (accept bool)) (varNames []string)
diff --git a/simple-store.go b/simple-store.go
index c460970..a626274 100644
--- a/simple-store.go
+++ b/simple-store.go
@@ -7,7 +7,7 @@ package expr
 import (
 	"fmt"
 	"slices"
-//	"strings"
+	// "strings"
 )
 
 type SimpleStore struct {
@@ -50,6 +50,7 @@ func (ctx *SimpleStore) Merge(src ExprContext) {
 		ctx.funcStore[name], _ = src.GetFuncInfo(name)
 	}
 }
+
 /*
 func varsCtxToBuilder(sb *strings.Builder, ctx ExprContext, indent int) {
 	sb.WriteString("vars: {\n")
@@ -165,6 +166,11 @@ func (ctx *SimpleStore) GetVar(varName string) (v any, exists bool) {
 	return
 }
 
+func (ctx *SimpleStore) GetLast() (v any) {
+	v = ctx.varStore["last"]
+	return
+}
+
 func (ctx *SimpleStore) UnsafeSetVar(varName string, value any) {
 	// fmt.Printf("[%p] setVar(%v, %v)\n", ctx, varName, value)
 	ctx.varStore[varName] = value