Function fallible_collections::format::try_format

pub fn try_format(
    max_capacity: usize,
    args: Arguments<'_>
) -> Result<String, TryReserveError>

Take a max capacity a try allocating a string with it.

Warning:

the max capacity must be > to the formating of the arguments. If writing the argument on the string exceed the capacity, no error is return and an allocation can occurs which can lead to a panic