Constant FORMAT_VERSION 

pub const FORMAT_VERSION: u32 = 1;

The format version this crate writes and the only one it reads.

The version changes whenever the encoding or any instruction’s meaning changes; decode refuses every other version rather than guess.

Examples

use bytecode_lang::{encode, ModuleBuilder, FORMAT_VERSION};

let bytes = encode(&ModuleBuilder::new().finish().unwrap());
assert_eq!(bytes[4..8], FORMAT_VERSION.to_le_bytes());