diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/write-fmt-errors.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/write-fmt-errors.rs')
-rw-r--r-- | src/test/ui/write-fmt-errors.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/test/ui/write-fmt-errors.rs b/src/test/ui/write-fmt-errors.rs new file mode 100644 index 000000000..3fcaefaa6 --- /dev/null +++ b/src/test/ui/write-fmt-errors.rs @@ -0,0 +1,48 @@ +// run-pass + +#![feature(io_error_uncategorized)] + +use std::fmt; +use std::io::{self, Error, Write, sink}; + +struct ErrorDisplay; + +impl fmt::Display for ErrorDisplay { + fn fmt(&self, _: &mut fmt::Formatter) -> fmt::Result { + Err(fmt::Error) + } +} + +struct ErrorWriter; + +const FORMAT_ERROR: io::ErrorKind = io::ErrorKind::Uncategorized; +const WRITER_ERROR: io::ErrorKind = io::ErrorKind::NotConnected; + +impl Write for ErrorWriter { + fn write(&mut self, _buf: &[u8]) -> io::Result<usize> { + Err(Error::new(WRITER_ERROR, "not connected")) + } + + fn flush(&mut self) -> io::Result<()> { Ok(()) } +} + +fn main() { + // Test that the error from the formatter is propagated. + let res = write!(sink(), "{} {} {}", 1, ErrorDisplay, "bar"); + assert!(res.is_err(), "formatter error did not propagate"); + assert_eq!(res.unwrap_err().kind(), FORMAT_ERROR); + + // Test that an underlying error is propagated + let res = write!(ErrorWriter, "abc"); + assert!(res.is_err(), "writer error did not propagate"); + + // Writer error + let res = write!(ErrorWriter, "abc {}", ErrorDisplay); + assert!(res.is_err(), "writer error did not propagate"); + assert_eq!(res.unwrap_err().kind(), WRITER_ERROR); + + // Formatter error + let res = write!(ErrorWriter, "{} abc", ErrorDisplay); + assert!(res.is_err(), "formatter error did not propagate"); + assert_eq!(res.unwrap_err().kind(), FORMAT_ERROR); +} |