Struct PhantomNotSend

pub struct PhantomNotSend { /* private fields */ }

Types with PhantomNotSend won’t automatically implement Send

Example

let not_send = not_send::PhantomNotSend;
std::thread::spawn(move || {
    drop(not_send);
}).join().unwrap();

error[E0277]: `*mut ()` cannot be sent between threads safely
   --> src/lib.rs:13:20
    |
6   |   std::thread::spawn(move || {
    |   ------------------ ^------
    |   |                  |
    |  _|__________________within this `{closure@src/lib.rs:6:20: 6:27}`
    | | |
    | | required by a bound introduced by this call
7   | |     drop(not_send);
8   | | }).join().unwrap();
    | |_^ `*mut ()` cannot be sent between threads safely
    |
    = help: within `{closure@src/lib.rs:6:20: 6:27}`, the trait `Send` is not implemented for `*mut ()`, which is required by `{closure@src/lib.rs:6:20: 6:27}: Send`
note: required because it appears within the type `PhantomData<*mut ()>`
   --> /Users/bajix/.rustup/toolchains/nightly-aarch64-apple-darwin/lib/rustlib/src/rust/library/core/src/marker.rs:753:12
    |
753 | pub struct PhantomData<T: ?Sized>;
    |            ^^^^^^^^^^^
note: required because it appears within the type `PhantomNotSend`
   --> /Users/bajix/Projects/not-send/src/lib.rs:57:12
    |
57  | pub struct PhantomNotSend {
    |            ^^^^^^^^^^^^^^
note: required because it's used within this closure
   --> src/lib.rs:13:20
    |
6   | std::thread::spawn(move || {
    |                    ^^^^^^^
note: required by a bound in `spawn`
   --> /Users/bajix/.rustup/toolchains/nightly-aarch64-apple-darwin/lib/rustlib/src/rust/library/std/src/thread/mod.rs:707:8
    |
704 | pub fn spawn<F, T>(f: F) -> JoinHandle<T>
    |        ----- required by a bound in this function
...
707 |     F: Send + 'static,
    |        ^^^^ required by this bound in `spawn`

Trait Implementations

impl Clone for PhantomNotSend

fn clone(&self) -> PhantomNotSend

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PhantomNotSend

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

Formats the value using the given formatter.

impl Default for PhantomNotSend

fn default() -> PhantomNotSend

Returns the “default value” for a type.

impl Hash for PhantomNotSend

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for PhantomNotSend

fn cmp(&self, other: &PhantomNotSend) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for PhantomNotSend

fn eq(&self, other: &PhantomNotSend) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for PhantomNotSend

fn partial_cmp(&self, other: &PhantomNotSend) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for PhantomNotSend

impl StructuralPartialEq for PhantomNotSend

impl Sync for PhantomNotSend