Add support for variable prepend operator: =+

1 files changed, 6 insertions, 0 deletions

diff --git a/build/variable b/build/variable
index 51d748d..799a35c 100644
--- a/build/variable
+++ b/build/variable
@@ -101,6 +101,9 @@ namespace build
     value&
     append (value, const variable&); // Aka operator+=().
 
+    value&
+    prepend (value, const variable&); // Aka operator=+().
+
     // Forwarded to the representation type's assign()/append() (see below).
     //
     template <typename T> value& operator= (T);
@@ -138,6 +141,9 @@ namespace build
     void
     append (names, const variable&);
 
+    void
+    prepend (names, const variable&);
+
   public:
     // Don't use directly except in the implementation of representation
     // types, in which case take care to update state.