Crate io_result_optional
source · [−]Expand description
Provides a trait for std::io::Result
that adds a method making
it easy to tell the difference between a file not found and
another error, since a common practice is to handle a file if it
exists.
Examples
use io_result_optional::IoResultOptional;
use std::fs::File;
let config = File::open(".app.rc")
.optional()?
.map(readconfig)
.unwrap_or_default();
use io_result_optional::IoResultOptional;
use std::fs::File;
if let Some(input) = File::open("data").optional()? {
// The data exists, so handle it ...
// If it doesn't exist, it is just ignored
// If there is another error, this function returns it.
}
Traits
A trait for io::Result
that adds a method making it easy to
tell the difference between a file not found and another error,
since a common practice is to handle a file if it exists.