Struct TransactionScope 

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

Scope-based transaction manager for nested transactions.

Provides a stack-based interface for managing nested transactions. Each begin() pushes a new transaction, and commit() or rollback() pops and finalizes it.

Implementations

impl<'a> TransactionScope<'a>

pub fn new(history: &'a mut HistoryManager) -> Self

Create a new transaction scope.

pub fn begin(&mut self, description: impl Into<String>)

Begin a new nested transaction.

pub fn execute(&mut self, cmd: Box<dyn UndoableCmd>) -> CommandResult

Execute a command in the current transaction.

If no transaction is active, the command is executed and added directly to history.

Errors

Returns error if the command fails.

pub fn commit(&mut self) -> CommandResult

Commit the current transaction.

If nested, the committed transaction is added to the parent. If at top level, it’s added to history.

Errors

Returns error if no transaction is active.

pub fn rollback(&mut self) -> CommandResult

Roll back the current transaction.

Errors

Returns error if no transaction is active.

pub fn is_active(&self) -> bool

Check if there are active transactions.

pub fn depth(&self) -> usize

Get the current nesting depth.

Trait Implementations

impl Drop for TransactionScope<'_>

fn drop(&mut self)

Executes the destructor for this type.