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-rw-r--r--src/libexpr/primops.hh11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/libexpr/primops.hh b/src/libexpr/primops.hh
index 39d23b04a5ce..c790b30f6d0b 100644
--- a/src/libexpr/primops.hh
+++ b/src/libexpr/primops.hh
@@ -9,7 +9,18 @@ struct RegisterPrimOp
 {
     typedef std::vector<std::tuple<std::string, size_t, PrimOpFun>> PrimOps;
     static PrimOps * primOps;
+    /* You can register a constant by passing an arity of 0. fun
+       will get called during EvalState initialization, so there
+       may be primops not yet added and builtins is not yet sorted. */
     RegisterPrimOp(std::string name, size_t arity, PrimOpFun fun);
 };
 
+/* These primops are disabled without enableNativeCode, but plugins
+   may wish to use them in limited contexts without globally enabling
+   them. */
+/* Load a ValueInitializer from a DSO and return whatever it initializes */
+void prim_importNative(EvalState & state, const Pos & pos, Value * * args, Value & v);
+/* Execute a program and parse its output */
+void prim_exec(EvalState & state, const Pos & pos, Value * * args, Value & v);
+
 }