Struct gc_sequence::map::MapWith

#[must_use = "sequences do nothing unless stepped"]
pub struct MapWith<S, C, F>(_, _);

Methods

impl<S, C, F> MapWith<S, C, F>

pub fn new(s: S, c: C, f: F) -> MapWith<S, C, F>

Trait Implementations

impl<'gc, S, C, F, R> Sequence<'gc> for MapWith<S, C, F> where
    S: Sequence<'gc>,
    C: Collect,
    F: 'static + FnOnce(C, S::Output) -> R, 

type Output = R

fn step(&mut self, mc: MutationContext<'gc, '_>) -> Option<Self::Output>

impl<S, C, F> Drop for MapWith<S, C, F>

fn drop(&mut self)

Executes the destructor for this type.

impl<S: Debug, C: Debug, F: Debug> Debug for MapWith<S, C, F>

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

Formats the value using the given formatter.

impl<S, C, F> Collect for MapWith<S, C, F> where
    S: Collect,
    Option<(C, StaticCollect<F>)>: Collect, 

fn needs_trace() -> bool

As an optimization, if this type can never hold a Gc pointer and trace is unnecessary to call, you may implement this method and return false. The default implementation returns true, signaling that Collect::trace must be called.

fn trace(&self, cc: CollectionContext)

Must call Collect::trace on all held Gc pointers. If this type holds inner types that implement Collect, a valid implementation would simply call Collect::trace on all the held values to ensure this.