You can call the trait method directly:
fn main() {
let mut a = String::new();
let mut b = std::fs::File::create("test").unwrap();
std::fmt::Write::write_fmt(&mut a, format_args!("hello"));
std::io::Write::write_fmt(&mut b, format_args!("hello"));
}
You can also choose to only import the trait in a smaller scope:
fn main() {
let mut a = String::new();
let mut b = std::fs::File::create("test").unwrap();
{
use std::fmt::Write;
a.write_fmt(format_args!("hello"));
}
{
use std::io::Write;
b.write_fmt(format_args!("hello"));
}
}
Note that if you choose to use a smaller scope, you can also use the write!
macro directly:
fn main() {
let mut a = String::new();
let mut b = std::fs::File::create("test").unwrap();
{
use std::fmt::Write;
write!(a, "hello");
}
{
use std::io::Write;
write!(b, "hello");
}
}
In either case, you should handle the Result
return value.
See also: