Remove io_safety feature flag (#65)

Author: andrewhickman

.github/workflows/ci.yml

@@ -54,13 +54,6 @@ jobs:
           args: --tests -- -D warnings
         if:  matrix.rust_version == 'stable'
 
-      - name: cargo check --features "io_safety"
-        uses: actions-rs/cargo@v1
-        with:
-          command: check
-          args: --features io_safety
-        if: ${{ matrix.rust_version == 'stable' || matrix.rust_version == 'beta' }}
-
       - name: cargo check --features tokio
         uses: actions-rs/cargo@v1
         with:

CHANGELOG.md

@@ -16,6 +16,8 @@
 
   Note that the original error is no longer exposed though [`Error::source()`](https://doc.rust-lang.org/stable/std/error/trait.Error.html#method.source) by default. If you need access to it, you can restore the previous behaviour with the `expose_original_error` feature flag.
 
+* The `io_safety` feature flag has been removed, and this functionality is now always enabled on Rust versions which support it (1.63.0 and greater).
+
 ## 2.11.0
 
 * Added the first line of the standard library documentation to each function's rustdocs, to make them more useful in IDEs ([#50](https://github.com/andrewhickman/fs-err/issues/45))

Cargo.toml

@@ -21,9 +21,6 @@ autocfg = "1"
 serde_json = "1.0.64"
 
 [features]
-# Adds I/O safety traits, introduced in Rust 1.63
-io_safety = []
-
 # Allow custom formatting of the error source
 #
 # When enabled errors emit `std::error::Error::source()` as Some (default is `None`) and

src/file.rs

@@ -303,18 +303,16 @@ mod unix {
         }
     }
 
-    #[cfg(feature = "io_safety")]
+    #[cfg(rustc_1_63)]
     mod io_safety {
         use std::os::unix::io::{AsFd, BorrowedFd, OwnedFd};
 
-        #[cfg_attr(docsrs, doc(cfg(feature = "io_safety")))]
         impl AsFd for crate::File {
             fn as_fd(&self) -> BorrowedFd<'_> {
                 self.file().as_fd()
             }
         }
 
-        #[cfg_attr(docsrs, doc(cfg(feature = "io_safety")))]
         impl From<crate::File> for OwnedFd {
             fn from(file: crate::File) -> Self {
                 file.into_parts().0.into()
@@ -363,18 +361,16 @@ mod windows {
         }
     }
 
-    #[cfg(feature = "io_safety")]
+    #[cfg(rustc_1_63)]
     mod io_safety {
         use std::os::windows::io::{AsHandle, BorrowedHandle, OwnedHandle};
 
-        #[cfg_attr(docsrs, doc(cfg(feature = "io_safety")))]
         impl AsHandle for crate::File {
             fn as_handle(&self) -> BorrowedHandle<'_> {
                 self.file().as_handle()
             }
         }
 
-        #[cfg_attr(docsrs, doc(cfg(feature = "io_safety")))]
         impl From<crate::File> for OwnedHandle {
             fn from(file: crate::File) -> Self {
                 file.into_parts().0.into()