lazy_format!() { /* proc-macro */ }Lazy format macro
Elision rules:
- has only Debug formats - [Debug]
- has formats of only one kind from: Binary,
LowerExp, LowerHex,
Octal, Pointer,
UpperExp or UpperHex -
Binary, LowerExp, LowerHex, Octal, Pointer, UpperExp or UpperHex
respectively
- otherwise - Display