From 89951cf7fb5b59dd78cd064b3fb209a33e9fa6c5 Mon Sep 17 00:00:00 2001
From: regnat <rg@regnat.ovh>
Date: Thu, 3 Jun 2021 10:52:43 +0200
Subject: [PATCH] Extract a Value method to set the eval cache

---
 src/libexpr/eval.cc  | 7 +++++++
 src/libexpr/value.hh | 1 +
 2 files changed, 8 insertions(+)

diff --git a/src/libexpr/eval.cc b/src/libexpr/eval.cc
index debdf4e42..11fda5dcb 100644
--- a/src/libexpr/eval.cc
+++ b/src/libexpr/eval.cc
@@ -1813,6 +1813,13 @@ ValueCache & Value::getEvalCache()
 
 ValueCache ValueCache::empty = ValueCache(nullptr);
 
+void Value::setEvalCache(ValueCache & newCache)
+{
+    if (internalType == tAttrs) {
+        attrs->eval_cache = newCache;
+    }
+}
+
 string EvalState::forceString(Value & v, PathSet & context, const Pos & pos)
 {
     string s = forceString(v, pos);
diff --git a/src/libexpr/value.hh b/src/libexpr/value.hh
index 740a19f0c..53a2e2cdd 100644
--- a/src/libexpr/value.hh
+++ b/src/libexpr/value.hh
@@ -353,6 +353,7 @@ public:
     std::vector<std::pair<Path, std::string>> getContext();
 
     ValueCache & getEvalCache();
+    void setEvalCache(ValueCache &);
 };