fixedstr_ext

Macro try_format

Source 
macro_rules! try_format {
    ($ty_size:ty, $($args:tt)*) => { ... };
}
Expand description

version of str_format! that returns an Option of the given type.

 let s = try_format!(str32,"abcdefg{}","hijklmnop").unwrap();
 let s2 = try_format!(str8,"abcdefg{}","hijklmnop");
 assert!(s2.is_none());