Hi Alex,
I had seen an example at
http://static.rust-lang.org/doc/master/std/rt/io/file/fn.open.html which
closes the file at the end of a block.
I simply wants to open a file, checking if there is any error, for later
to can read it line by line until the end of file. I was wrong using the
term "closing its file descriptor".
El 03/11/13 05:42, Alex Crichton escribió:
This api is a little in flux (hopefully #10179 will land soon), but
I'm not quite sure what you mean about keeping the file descriptor
open. If there was an error opening the file, then a file descriptor
was never allocated and there's nothing to keep open. Regardless, once
my pull request lands, your example would look something like:
use std::rt::io;
use std::rt::io::File;
match io::result(|| File::open(&Path::new("/some/path")) {
Ok(file) => { /* file was successfully opened, it existed */ }
Err(e) => { /* file couldn't be opened, error contained in e */ }
}
On Sat, Nov 2, 2013 at 5:34 PM, John Mija <[email protected]> wrote:
How to check an error at opening a file but without closing its file
descriptor?
use std::path;
use std::rt::io;
use std::rt::io::file;
let filename = "/some/path";
let f = file::open(&path::Path::new(filename), io::Open, io::Read);
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