pub fn encode_size(value: u64, out: &mut Vec<u8>)Expand description
Encode an element size VINT (marker stripped from value, marker bit
added on write) into out.
Uses the minimal byte length L (1..=8) that fits value in 7*L data
bits. The all-1s VINT_DATA pattern is reserved for “unknown size”
(decode_size), so a value that would exactly fill all-1s bumps to
the next length.
Never panics: a value that doesn’t fit even 8 bytes’ worth of VINT data
(56 bits — not reachable for any size this crate itself ever writes, but
push_frame’s caller-supplied track_number is technically unbounded)
saturates to the largest representable 8-byte value rather than crashing.