pub struct PhantomContravariant<T>(/* private fields */)
where
T: ?Sized;phantom_variance_markers)Expand description
Zero-sized type used to mark a type parameter as contravariant.
Types passed as arguments to a function are contravariant. If the type is also part of the return value from a function then it is invariant. See the reference for more information.
Note: If T is otherwise covariant or invariant, the resulting type is invariant.
§Layout
For all T, the following are guaranteed:
size_of::<PhantomContravariant<T>>() == 0align_of::<PhantomContravariant<T>>() == 1
Implementations§
Source§impl<T> PhantomContravariant<T>where
T: ?Sized,
impl<T> PhantomContravariant<T>where
T: ?Sized,
Sourcepub const fn new() -> PhantomContravariant<T>
🔬This is a nightly-only experimental API. (phantom_variance_markers)
pub const fn new() -> PhantomContravariant<T>
phantom_variance_markers)Constructs a new instance of the variance marker.
Trait Implementations§
Source§impl<T> Clone for PhantomContravariant<T>where
T: ?Sized,
impl<T> Clone for PhantomContravariant<T>where
T: ?Sized,
Source§fn clone(&self) -> PhantomContravariant<T>
fn clone(&self) -> PhantomContravariant<T>
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source. Read moreSource§impl<T> Debug for PhantomContravariant<T>where
T: ?Sized,
impl<T> Debug for PhantomContravariant<T>where
T: ?Sized,
Source§impl<T> Default for PhantomContravariant<T>where
T: ?Sized,
impl<T> Default for PhantomContravariant<T>where
T: ?Sized,
Source§fn default() -> PhantomContravariant<T>
fn default() -> PhantomContravariant<T>
Source§impl<T> Hash for PhantomContravariant<T>where
T: ?Sized,
impl<T> Hash for PhantomContravariant<T>where
T: ?Sized,
Source§impl<T> Ord for PhantomContravariant<T>where
T: ?Sized,
impl<T> Ord for PhantomContravariant<T>where
T: ?Sized,
Source§fn cmp(&self, _: &PhantomContravariant<T>) -> Ordering
fn cmp(&self, _: &PhantomContravariant<T>) -> Ordering
1.21.0 · Source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Source§impl<T> PartialEq for PhantomContravariant<T>where
T: ?Sized,
impl<T> PartialEq for PhantomContravariant<T>where
T: ?Sized,
Source§impl<T> PartialOrd for PhantomContravariant<T>where
T: ?Sized,
impl<T> PartialOrd for PhantomContravariant<T>where
T: ?Sized,
impl<T> Copy for PhantomContravariant<T>where
T: ?Sized,
impl<T> Eq for PhantomContravariant<T>where
T: ?Sized,
impl<T> Variance for PhantomContravariant<T>where
T: ?Sized,
Auto Trait Implementations§
impl<T> Freeze for PhantomContravariant<T>where
T: ?Sized,
impl<T> RefUnwindSafe for PhantomContravariant<T>where
T: ?Sized,
impl<T> Send for PhantomContravariant<T>where
T: ?Sized,
impl<T> Sync for PhantomContravariant<T>where
T: ?Sized,
impl<T> Unpin for PhantomContravariant<T>where
T: ?Sized,
impl<T> UnwindSafe for PhantomContravariant<T>where
T: ?Sized,
Blanket Implementations§
Source§impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedExplicit<'a, E> for Twhere
T: 'a,
Source§impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
impl<'a, T, E> AsTaggedImplicit<'a, E> for Twhere
T: 'a,
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<Q, K> Comparable<K> for Q
impl<Q, K> Comparable<K> for Q
Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key and return true if they are equal.Source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
fn instrument(self, span: Span) -> Instrumented<Self> ⓘ
Source§fn in_current_span(self) -> Instrumented<Self> ⓘ
fn in_current_span(self) -> Instrumented<Self> ⓘ
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moreSource§impl<T> Paint for Twhere
T: ?Sized,
impl<T> Paint for Twhere
T: ?Sized,
Source§fn fg(&self, value: Color) -> Painted<&T>
fn fg(&self, value: Color) -> Painted<&T>
Returns a styled value derived from self with the foreground set to
value.
This method should be used rarely. Instead, prefer to use color-specific
builder methods like red() and
green(), which have the same functionality but are
pithier.
§Example
Set foreground color to white using fg():
use yansi::{Paint, Color};
painted.fg(Color::White);Set foreground color to white using white().
use yansi::Paint;
painted.white();Source§fn bright_black(&self) -> Painted<&T>
fn bright_black(&self) -> Painted<&T>
Source§fn bright_red(&self) -> Painted<&T>
fn bright_red(&self) -> Painted<&T>
Source§fn bright_green(&self) -> Painted<&T>
fn bright_green(&self) -> Painted<&T>
Source§fn bright_yellow(&self) -> Painted<&T>
fn bright_yellow(&self) -> Painted<&T>
Source§fn bright_blue(&self) -> Painted<&T>
fn bright_blue(&self) -> Painted<&T>
Source§fn bright_magenta(&self) -> Painted<&T>
fn bright_magenta(&self) -> Painted<&T>
Source§fn bright_cyan(&self) -> Painted<&T>
fn bright_cyan(&self) -> Painted<&T>
Source§fn bright_white(&self) -> Painted<&T>
fn bright_white(&self) -> Painted<&T>
Source§fn bg(&self, value: Color) -> Painted<&T>
fn bg(&self, value: Color) -> Painted<&T>
Returns a styled value derived from self with the background set to
value.
This method should be used rarely. Instead, prefer to use color-specific
builder methods like on_red() and
on_green(), which have the same functionality but
are pithier.
§Example
Set background color to red using fg():
use yansi::{Paint, Color};
painted.bg(Color::Red);Set background color to red using on_red().
use yansi::Paint;
painted.on_red();Source§fn on_primary(&self) -> Painted<&T>
fn on_primary(&self) -> Painted<&T>
Source§fn on_magenta(&self) -> Painted<&T>
fn on_magenta(&self) -> Painted<&T>
Source§fn on_bright_black(&self) -> Painted<&T>
fn on_bright_black(&self) -> Painted<&T>
Source§fn on_bright_red(&self) -> Painted<&T>
fn on_bright_red(&self) -> Painted<&T>
Source§fn on_bright_green(&self) -> Painted<&T>
fn on_bright_green(&self) -> Painted<&T>
Source§fn on_bright_yellow(&self) -> Painted<&T>
fn on_bright_yellow(&self) -> Painted<&T>
Source§fn on_bright_blue(&self) -> Painted<&T>
fn on_bright_blue(&self) -> Painted<&T>
Source§fn on_bright_magenta(&self) -> Painted<&T>
fn on_bright_magenta(&self) -> Painted<&T>
Source§fn on_bright_cyan(&self) -> Painted<&T>
fn on_bright_cyan(&self) -> Painted<&T>
Source§fn on_bright_white(&self) -> Painted<&T>
fn on_bright_white(&self) -> Painted<&T>
Source§fn attr(&self, value: Attribute) -> Painted<&T>
fn attr(&self, value: Attribute) -> Painted<&T>
Enables the styling Attribute value.
This method should be used rarely. Instead, prefer to use
attribute-specific builder methods like bold() and
underline(), which have the same functionality
but are pithier.
§Example
Make text bold using attr():
use yansi::{Paint, Attribute};
painted.attr(Attribute::Bold);Make text bold using using bold().
use yansi::Paint;
painted.bold();Source§fn rapid_blink(&self) -> Painted<&T>
fn rapid_blink(&self) -> Painted<&T>
Source§fn quirk(&self, value: Quirk) -> Painted<&T>
fn quirk(&self, value: Quirk) -> Painted<&T>
Enables the yansi Quirk value.
This method should be used rarely. Instead, prefer to use quirk-specific
builder methods like mask() and
wrap(), which have the same functionality but are
pithier.
§Example
Enable wrapping using .quirk():
use yansi::{Paint, Quirk};
painted.quirk(Quirk::Wrap);Enable wrapping using wrap().
use yansi::Paint;
painted.wrap();Source§fn clear(&self) -> Painted<&T>
👎Deprecated since 1.0.1: renamed to resetting() due to conflicts with Vec::clear().
The clear() method will be removed in a future release.
fn clear(&self) -> Painted<&T>
resetting() due to conflicts with Vec::clear().
The clear() method will be removed in a future release.Source§fn whenever(&self, value: Condition) -> Painted<&T>
fn whenever(&self, value: Condition) -> Painted<&T>
Conditionally enable styling based on whether the Condition value
applies. Replaces any previous condition.
See the crate level docs for more details.
§Example
Enable styling painted only when both stdout and stderr are TTYs:
use yansi::{Paint, Condition};
painted.red().on_yellow().whenever(Condition::STDOUTERR_ARE_TTY);