Struct AstTransaction 

pub struct AstTransaction<'a> { /* private fields */ }

An open transaction over a model.

Dropping one without calling AstTransaction::commit rolls it back: a transaction that goes out of scope unfinished must not leave half its changes behind.

Implementations

impl<'a> AstTransaction<'a>

pub fn ast(&mut self) -> &mut Ast

The model under edit.

Mutating calls made through this reference join the transaction rather than committing on their own.

pub fn model(&self) -> &Ast

The model under edit, read-only.

pub fn commit(self) -> Result<Changeset, AstError>

Validate and publish the transaction.

Errors

AstError::Invariant when a structural invariant fails, in which case the model has been rolled back to its state before begin and no observer was notified. Spec §8.1.

pub fn rollback(self)

Discard every change the transaction made.

Trait Implementations

impl Drop for AstTransaction<'_>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.