Trait Transaction 

pub trait Transaction: Clone {
    // Provided method
    fn transaction<R>(
        &mut self,
        f: impl FnOnce(&mut Self) -> Result<R, Error>,
    ) -> Result<R, Error> { ... }
}

Helper trait to make TokenIter transactional

Provided Methods

fn transaction<R>( &mut self, f: impl FnOnce(&mut Self) -> Result<R, Error>, ) -> Result<R, Error>

Transaction on a TokenIter, calls a FnOnce(&mut TokenIter) -> Result<T> within a transaction. When the closure succeeds, then the transaction is committed and its result is returned.

Errors

When the closure returns an error, the transaction is rolled back and the error is returned.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Transaction for ShadowCountedIter<'_, <TokenStream as IntoIterator>::IntoIter>

Implementors