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, 4 insertions, 4 deletions

diff --git a/test/uio.cc b/test/uio.cc
index 47646e0..7d4c073 100644
--- a/test/uio.cc
+++ b/test/uio.cc
@@ -12,16 +12,16 @@ TEST(uio_u8, empty) {
   auto uio = u8::open(io::memory(""));
   std::string tmp;
   auto ret = uio->repeat_read(tmp, 10);
-  ASSERT_TRUE(ret.has_value());
-  EXPECT_EQ(0, ret.value());
+  ASSERT_FALSE(ret.has_value());
+  EXPECT_EQ(io::ReadError::Eof, ret.error());
 }
 
 TEST(uio_u16, empty) {
   auto uio = u16::open(io::memory(""));
   std::u16string tmp;
   auto ret = uio->repeat_read(tmp, 10);
-  ASSERT_TRUE(ret.has_value());
-  EXPECT_EQ(0, ret.value());
+  ASSERT_FALSE(ret.has_value());
+  EXPECT_EQ(io::ReadError::Eof, ret.error());
 }
 
 TEST(uio_u8, sample) {