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, 1 insertions, 0 deletions

diff --git a/src/io.hh b/src/io.hh
index e93b72b..7c21028 100644
--- a/src/io.hh
+++ b/src/io.hh
@@ -10,6 +10,7 @@ namespace io {
 
 enum class ReadError {
   Error,
+  Eof,
   InvalidData,  // invalid data read (not used by raw file)
   MaxTooSmall,  // max argument needs to be bigger (not used by raw file)
 };