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convert io wrapper records into structs

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This commit is contained in:
Erick Tryzelaar 2013-01-24 12:54:24 -08:00
parent 9b17e7a777
commit 339618a7f9
1 changed files with 10 additions and 5 deletions
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15
src/libcore/io.rs
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@ -455,10 +455,15 @@ fn tell(&self) -> uint {
}
}
struct Wrapper<T, C> {
base: T,
cleanup: C,
}
// A forwarding impl of reader that also holds on to a resource for the
// duration of its lifetime.
// FIXME there really should be a better way to do this // #2004
impl<T: Reader, C> {base: T, cleanup: C}: Reader {
impl<R: Reader, C> Wrapper<R, C>: Reader {
fn read(&self, bytes: &[mut u8], len: uint) -> uint {
self.base.read(bytes, len)
}
@ -487,7 +492,7 @@ pub fn FILERes(f: *libc::FILE) -> FILERes {
pub fn FILE_reader(f: *libc::FILE, cleanup: bool) -> Reader {
if cleanup {
{base: f, cleanup: FILERes(f)} as Reader
Wrapper { base: f, cleanup: FILERes(f) } as Reader
} else {
f as Reader
}
@ -587,7 +592,7 @@ pub trait Writer {
fn get_type(&self) -> WriterType;
}
impl<T: Writer, C> {base: T, cleanup: C}: Writer {
impl<W: Writer, C> Wrapper<W, C>: Writer {
fn write(&self, bs: &[const u8]) { self.base.write(bs); }
fn seek(&self, off: int, style: SeekStyle) { self.base.seek(off, style); }
fn tell(&self) -> uint { self.base.tell() }
@ -639,7 +644,7 @@ fn get_type(&self) -> WriterType {
pub fn FILE_writer(f: *libc::FILE, cleanup: bool) -> Writer {
if cleanup {
{base: f, cleanup: FILERes(f)} as Writer
Wrapper { base: f, cleanup: FILERes(f) } as Writer
} else {
f as Writer
}
@ -696,7 +701,7 @@ pub fn FdRes(fd: fd_t) -> FdRes {
pub fn fd_writer(fd: fd_t, cleanup: bool) -> Writer {
if cleanup {
{base: fd, cleanup: FdRes(fd)} as Writer
Wrapper { base: fd, cleanup: FdRes(fd) } as Writer
} else {
fd as Writer
}