Implement AsRawFd/IntoRawFd for RawFd #40842
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This is useful to build os abstraction like the nix crate does. It allows to define functions, which accepts generic arguments of data structures convertible to RawFd, including RawFd itself. For example: fn write<FD: AsRawFd>(fd: FD, buf: &[u8]) -> Result<usize> instead of: fn write(fd: RawFd, buf: &[u8]) -> Result<usize> write(foo.as_raw_fd(), buf);
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Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @aturon (or someone else) soon. If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes. Please see the contribution instructions for more information. |
Mic92
commented
Mar 26, 2017
| @@ -73,6 +73,13 @@ pub trait IntoRawFd { | |||
| } | |||
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| #[stable(feature = "rust1", since = "1.0.0")] | |||
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I am not familiar with the internal feature flags and what is appropriate here.
alexcrichton
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T-libs-api
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📌 Commit 2cf686f has been approved by |
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⌛ Testing commit 2cf686f with merge 131a125... |
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💔 Test failed - status-appveyor |
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⌛ Testing commit 2cf686f with merge d9d7931... |
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💔 Test failed - status-appveyor |
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@bors: retry (This appveyor failure has been resolved) |
frewsxcv
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Mar 31, 2017
Implement AsRawFd/IntoRawFd for RawFd This is useful to build os abstraction like the nix crate does. It allows to define functions, which accepts generic arguments of data structures convertible to RawFd, including RawFd itself. For example: ``` fn write<FD: AsRawFd>(fd: FD, buf: &[u8]) -> Result<usize> write(file, buf); ``` instead of: ``` fn write(fd: RawFd, buf: &[u8]) -> Result<usize> write(file.as_raw_fd(), buf); ``` cc @kamalmarhubi
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Because This doesn't necessarily seem like a good idea as APIs that previously relied on |
codyps
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Apr 3, 2017
This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
frewsxcv
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Apr 3, 2017
…aturon Revert "Implement AsRawFd/IntoRawFd for RawFd" This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
frewsxcv
added a commit
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that referenced
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Apr 3, 2017
…aturon Revert "Implement AsRawFd/IntoRawFd for RawFd" This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
frewsxcv
added a commit
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Apr 4, 2017
…aturon Revert "Implement AsRawFd/IntoRawFd for RawFd" This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
frewsxcv
added a commit
to frewsxcv/rust
that referenced
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Apr 4, 2017
…aturon Revert "Implement AsRawFd/IntoRawFd for RawFd" This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
frewsxcv
added a commit
to frewsxcv/rust
that referenced
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Apr 5, 2017
…aturon Revert "Implement AsRawFd/IntoRawFd for RawFd" This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
frewsxcv
added a commit
to frewsxcv/rust
that referenced
this pull request
Apr 5, 2017
…aturon Revert "Implement AsRawFd/IntoRawFd for RawFd" This reverts commit 2cf686f (rust-lang#40842) RawFd is a type alias for c_int, which is itself a type alias for i32. As a result, adding AsRawFd and IntoRawFd impls for RawFd actually adds them for i32. As a result, the reverted commit makes this valid: ``` use std::os::unix::io::AsRawFd; fn arf<T: AsRawFd>(_: T) {} fn main() { arf(32i32) } ``` Implimenting AsRawFd and IntoRawFd for i32 breaks the promises of both those traits that their methods return a valid RawFd. r? @aturon cc @Mic92 @kamalmarhubi
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This is useful to build os abstraction like the nix crate does.
It allows to define functions, which accepts generic arguments
of data structures convertible to RawFd, including RawFd itself.
For example:
instead of:
cc @kamalmarhubi