Struct dungeon_cell::IsSend

pub struct IsSend<const F: bool> { /* private fields */ }

Flag for if a type implements std::marker::Send.

This is the type to use where ValidIsSend is required.

By storing the associated Marker, a type will be forced to not auto implement std::marker::Send when IsSend<false> is used. However, the use of IsSend<true> does not force the type to actually implement std::marker::Send. It just allows it to. This is used by dungeon_cell types to implement std::marker::Send safely based on what the user needs.

Examples

use static_assertions::*;
use dungeon_cell::{IsSend, valid_generic_markers::ValidIsSend};

struct Test<S: ValidIsSend> {
    _marker: S::Marker,
}

assert_not_impl_all!(Test<IsSend<false>>: Send);
assert_impl_all!(Test<IsSend<true>>: Send);

Trait Implementations

impl ValidIsSend for IsSend<false>

type Marker = IsSendFalse

Type of marker that may prevent the automatic std::marker::Send implementation.

const MARKER_INSTANCE: Self::Marker = _

Instance of the associated Self::Marker.

const VALUE: bool = false

Yes/no flag.

impl ValidIsSend for IsSend<true>

type Marker = IsSendTrue

Type of marker that may prevent the automatic std::marker::Send implementation.

const MARKER_INSTANCE: Self::Marker = IsSendTrue

Instance of the associated Self::Marker.

const VALUE: bool = true

Yes/no flag.