Change io::Reader and company to return ReadError::Eof instead of 0.

It's debatable if Eof should be considered an error or not.
But it is pretty clear it generally is a special response that
needs special handling, so easier to keep with the unexpected lot.

Also keeps better at higher abstraction levels, such as the line
reader.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/csv.cc b/src/csv.cc
index c3b2562..4bc7804 100644
--- a/src/csv.cc
+++ b/src/csv.cc
@@ -30,10 +30,10 @@ class ReaderImpl : public Reader {
           continue;
         return line_;
       }
-      if (line.error().eof) {
+      if (line.error() == io::ReadError::Eof) {
         return {};
       }
-      return std::unexpected(line.error().io_error.value());
+      return std::unexpected(line.error());
     }
   }