1 files changed, 9 insertions, 0 deletions
diff --git a/src/libexpr/eval.hh b/src/libexpr/eval.hh
index 146f21255034..46bda86d084e 100644
--- a/src/libexpr/eval.hh
+++ b/src/libexpr/eval.hh
@@ -90,6 +90,14 @@ public:
 private:
     SrcToStore srcToStore;
 
+    /* A cache from path names to parse trees. */
+#if HAVE_BOEHMGC
+    typedef std::map<Path, Expr *, std::less<Path>, traceable_allocator<std::pair<const Path, Expr *> > > FileParseCache;
+#else
+    typedef std::map<Path, Expr *> FileParseCache;
+#endif
+    FileParseCache fileParseCache;
+
     /* A cache from path names to values. */
 #if HAVE_BOEHMGC
     typedef std::map<Path, Value, std::less<Path>, traceable_allocator<std::pair<const Path, Value> > > FileEvalCache;
@@ -268,6 +276,7 @@ public:
 
     /* Print statistics. */
     void printStats();
+    void printStats2();
 
     void realiseContext(const PathSet & context);