Struct SessionJournal 

pub struct SessionJournal {
    pub version: u32,
    pub program_checksum: u32,
    pub seed: Option<u64>,
    pub events: Vec<JournalEvent>,
    pub truncated: bool,
    pub checkpoint: Option<SaveState>,
}

One ordered log of every input that entered the VM during a session, plus a terminal fast-restore checkpoint.

Serde-serializable; the canonical durable save artifact. Values serialize tagged (via Value’s derived enum representation and SaveState’s BTreeMap<String, Value>) — no lossy List/Divert → null mapping. Deterministic: event order is insertion order; embedded maps are BTreeMap.

Fields

version: u32

Format version (see SESSION_JOURNAL_VERSION).

program_checksum: u32

Checksum of the program this journal was recorded against, so replay can detect a recompile and decide fast-restore vs full replay.

seed: Option<u64>

RNG seed applied at session start, if the host seeded one.

events: Vec<JournalEvent>

Ordered inputs, in the order they entered the VM.

truncated: bool

Set when the cap was hit or a divergence truncated the log.

checkpoint: Option<SaveState>

Fast-restore: terminal game-state snapshot (ruling: embedded SaveState in v1). Present once the session has produced state worth checkpointing.

Implementations

impl SessionJournal

pub fn new(program_checksum: u32, seed: Option<u64>) -> Self

A fresh, empty journal bound to program_checksum.

pub fn len(&self) -> usize

Number of recorded events.

pub fn is_empty(&self) -> bool

Whether nothing has been recorded.

Trait Implementations

impl Clone for SessionJournal

fn clone(&self) -> SessionJournal

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SessionJournal

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for SessionJournal

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for SessionJournal

fn eq(&self, other: &SessionJournal) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for SessionJournal

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for SessionJournal