From ebe3d2d3704aca001ff818295af014581dcf348f Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Tue, 21 Aug 2018 15:22:04 +0200
Subject: Improve 'coroutine has finished' error message

---
 src/libutil/serialise.hh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/libutil/serialise.hh')

diff --git a/src/libutil/serialise.hh b/src/libutil/serialise.hh
index 14b62fdb6774..4b6ad5da5b9c 100644
--- a/src/libutil/serialise.hh
+++ b/src/libutil/serialise.hh
@@ -214,7 +214,11 @@ struct LambdaSource : Source
 
 /* Convert a function that feeds data into a Sink into a Source. The
    Source executes the function as a coroutine. */
-std::unique_ptr<Source> sinkToSource(std::function<void(Sink &)> fun);
+std::unique_ptr<Source> sinkToSource(
+    std::function<void(Sink &)> fun,
+    std::function<void()> eof = []() {
+        throw EndOfFile("coroutine has finished");
+    });
 
 
 void writePadding(size_t len, Sink & sink);
-- 
cgit 1.4.1