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Rollup merge of #58530 - scottmcm:monomorphize-less, r=TimNN

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Monomorphize less code in fs::{read|write}

Since the generic-ness is only for the as_refs, might as well have std just compile the important part once instead of on every use.
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kennytm 2019-02-20 01:13:25 +08:00
commit 7ef11d4f84
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1 changed files with 18 additions and 9 deletions
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27
src/libstd/fs.rs
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@ -254,10 +254,13 @@ fn initial_buffer_size(file: &File) -> usize {
/// ```
#[stable(feature = "fs_read_write_bytes", since = "1.26.0")]
pub fn read<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
let mut file = File::open(path)?;
let mut bytes = Vec::with_capacity(initial_buffer_size(&file));
file.read_to_end(&mut bytes)?;
Ok(bytes)
fn inner(path: &Path) -> io::Result<Vec<u8>> {
let mut file = File::open(path)?;
let mut bytes = Vec::with_capacity(initial_buffer_size(&file));
file.read_to_end(&mut bytes)?;
Ok(bytes)
}
inner(path.as_ref())
}
/// Read the entire contents of a file into a string.
@ -296,10 +299,13 @@ pub fn read<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
/// ```
#[stable(feature = "fs_read_write", since = "1.26.0")]
pub fn read_to_string<P: AsRef<Path>>(path: P) -> io::Result<String> {
let mut file = File::open(path)?;
let mut string = String::with_capacity(initial_buffer_size(&file));
file.read_to_string(&mut string)?;
Ok(string)
fn inner(path: &Path) -> io::Result<String> {
let mut file = File::open(path)?;
let mut string = String::with_capacity(initial_buffer_size(&file));
file.read_to_string(&mut string)?;
Ok(string)
}
inner(path.as_ref())
}
/// Write a slice as the entire contents of a file.
@ -326,7 +332,10 @@ pub fn read_to_string<P: AsRef<Path>>(path: P) -> io::Result<String> {
/// ```
#[stable(feature = "fs_read_write_bytes", since = "1.26.0")]
pub fn write<P: AsRef<Path>, C: AsRef<[u8]>>(path: P, contents: C) -> io::Result<()> {
File::create(path)?.write_all(contents.as_ref())
fn inner(path: &Path, contents: &[u8]) -> io::Result<()> {
File::create(path)?.write_all(contents)
}
inner(path.as_ref(), contents.as_ref())
}
impl File {