243d65c8e5
Discard is not really a read operation, and in theory it could Seek the underlying Reader without actually reading anything, so an UnreadByte following a Discard is disallowed. Similarly, although WriteTo usually does end up calling Read on the underlying buffer, if the underlying Reader implements io.WriterTo it may instead terminate in a call to WriteTo, without ever buffering or even seeing the last byte written. (It is conceptually read-like, but not strictly “a read operation”.) Fixes #48446 Change-Id: Ide6f2b157332b423486810399f66140c914144e5 Reviewed-on: https://go-review.googlesource.com/c/go/+/351810 Trust: Bryan C. Mills <bcmills@google.com> Trust: Joe Tsai <joetsai@digital-static.net> Reviewed-by: Joe Tsai <joetsai@digital-static.net> |
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