I am not sure, how to allocate a vector use its fields in a struct I'm returning. My created vectors do not outlive the function call =/

Lifetimes in rust

pub struct GzipHeader<'a> {
	id: &'a[u8], 		// length 2
	c_meth: u8,
	flags: GzipFlags,
	m_time: &'a[u8], 	// length 4
	ex_flags: GzipFlags,
	os: u8
}

fn read_gzip_header<R: Reader>(r: bitio::BitReader<R>) -> GzipHeader {

    // this needs to outlive the function, i think?
	let buf: &mut [u8] = vec::with_capacity(10).as_mut_slice();
    
    // i tried to use this to act as the storage behind the returned header buf it failed
	let header_data: ~[u8] = vec::with_capacity(10);

	match r.read_bytes(buf, 10) {
		Some(bytes) => vec::bytes::copy_memory(buf, header_data),
		_ 			=> fail!(~"Error while reading GzipHeader!")
	};

	GzipHeader { 
		id: header_data.slice(0, 2),
		c_meth: header_data[2], 
		flags: header_data[3] as GzipFlags,
		m_time: header_data.slice(4, 8),
		ex_flags: header_data[8] as GzipFlags,
		os: header_data[9]
	}
}