Macro output

macro_rules! output {
    ($output: ident, $buffer: expr, $host_fn:path, $($arg:expr),*) => { ... };
}

Utility macro to invoke a host function that expect a output: &mut &mut [u8] as last argument.

Example:

use pallet_revive_uapi::{output, HostFn, HostFnImpl as api};

// call `api::caller` and store the output in `caller`
output!(caller, [0u8; 32], api::caller,);

// call `api::get_storage` and store the output in `address`
output!(address, [0u8; 32], api::get_storage, &[1u8; 32]);