`bytes!` macro rejects zero literal in decimal and octal forms

[leighmcculloch]

What version are you using?

0.0.5

What did you do?

Used bytes!(0) or bytes!(0o0) to convert the zero literal to bytes.

let b = bytes_lit::bytes!(0);
let b = bytes_lit::bytes!(0o0);

What did you expect to see?

Both produce [0u8], consistent with the hex and binary forms which already work:

bytes_lit::bytes!(0x0);  // => [0u8] ✓
bytes_lit::bytes!(0b0);  // => [0u8] ✓

What did you see instead?

Compile error:

leading zeros are not preserved or supported on integer literals in decimal form

leading zeros are not preserved or supported on integer literals in octal form

The leading-zero detection in bytes() treats the sole 0 digit as a leading zero. When the entire value is zero there is no meaningful leading zero to reject — it is just the value itself.