Struct MapWriter

pub struct MapWriter<F, T1, T2, W>
where
    W: ObjectWriter<T2>,
    F: Fn(T1) -> Result<T2>,
{
    pub(crate) _phantom: PhantomData<(T1, T2)>,
    pub(crate) transform: F,
    pub(crate) writer: W,
}

Writer that applies a transform to an underlying writer.

Fields

_phantom: PhantomData<(T1, T2)>

transform: F

writer: W

Trait Implementations

impl<F, T1, T2, W> ObjectWriter<T1> for MapWriter<F, T1, T2, W>

where W: ObjectWriter<T2>, F: Fn(T1) -> Result<T2>,

fn write_object(&mut self, object: T1) -> Result<()>

Write one object.

fn finish(self) -> Result<usize>

Finish and close the target.

fn write_all_objects<I>(&mut self, objects: I) -> Result<usize>

where I: Iterator<Item = T>,

Write an iterator full of objects.

fn write_and_finish<I>(self, objects: I) -> Result<usize>

where I: Iterator<Item = T>,

Write an iterator of objects and finish the writer.

fn with_transform<F, T2>(self, transform: F) -> MapWriter<F, T2, T, Self>

where F: Fn(T2) -> Result<T>,

Wrap this object writer in a transformed writer.