1 files changed, 6 insertions, 0 deletions
diff --git a/src/libexpr/nixexpr.hh b/src/libexpr/nixexpr.hh
index ecd2534088f6..30145c87b344 100644
--- a/src/libexpr/nixexpr.hh
+++ b/src/libexpr/nixexpr.hh
@@ -47,6 +47,12 @@ private:
 };
 
 
+/* A STL vector of ATerms.  Should be used with great care since it's
+   stored on the heap, and the elements are therefore not roots to the
+   ATerm garbage collector. */
+typedef vector<ATerm> ATermVector;
+
+
 /* Convert a string to an ATerm (i.e., a quoted nullary function
    applicaton). */
 ATerm string2ATerm(const string & s);