// Okay, we can somehow store it in a variable
let foo = format_args!("{} foo {:?}", 1, 2);

// But once we try to use it, we get
// "error[E0716]: temporary value dropped while borrowed"
// "note: consider using a `let` binding to create a longer lived value"
// "note: this error originates in the macro `format_args`"
println!("{}", foo);

// Using it directly is okay though
println!("{}", format_args!("{} foo {:?}", 1, 2));

// We can get pretty creative within the "direct usage" constraints :D
let foo = match format_args!("{} foo {:?}", 1, 2) {
    foo => {println!("{}", foo);},
};

// But even if we manage to store the value in a struct, …
struct Foo<'a> {foo: std::fmt::Arguments<'a> }
let foo = Foo { foo: format_args!("{} foo {:?}", 1, 2) };

// … we still cannot make use of it outside of the scope it was created in
println!("{}", foo.foo); // <- error[E0716]: temporary value dropped while borrowed