Struct scrypto_test::prelude::fmt::FormatterFn
source · pub struct FormatterFn<F>(pub F)
where
F: Fn(&mut Formatter<'_>) -> Result<(), Error>;
🔬This is a nightly-only experimental API. (
debug_closure_helpers
)Expand description
Implements fmt::Debug
and fmt::Display
using a function.
§Examples
#![feature(debug_closure_helpers)]
use std::fmt;
let value = 'a';
assert_eq!(format!("{}", value), "a");
assert_eq!(format!("{:?}", value), "'a'");
let wrapped = fmt::FormatterFn(|f| write!(f, "{:?}", &value));
assert_eq!(format!("{}", wrapped), "'a'");
assert_eq!(format!("{:?}", wrapped), "'a'");
Tuple Fields§
§0: F
🔬This is a nightly-only experimental API. (
debug_closure_helpers
)Trait Implementations§
source§impl<F> Debug for FormatterFn<F>
impl<F> Debug for FormatterFn<F>
Auto Trait Implementations§
impl<F> RefUnwindSafe for FormatterFn<F>where
F: RefUnwindSafe,
impl<F> Send for FormatterFn<F>where
F: Send,
impl<F> Sync for FormatterFn<F>where
F: Sync,
impl<F> Unpin for FormatterFn<F>where
F: Unpin,
impl<F> UnwindSafe for FormatterFn<F>where
F: UnwindSafe,
Blanket Implementations§
§impl<U> As for U
impl<U> As for U
§fn as_<T>(self) -> Twhere
T: CastFrom<U>,
fn as_<T>(self) -> Twhere
T: CastFrom<U>,
Casts
self
to type T
. The semantics of numeric casting with the as
operator are followed, so <T as As>::as_::<U>
can be used in the same way as T as U
for numeric conversions. Read moresource§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
Mutably borrows from an owned value. Read more
§impl<T> Downcast for Twhere
T: Any,
impl<T> Downcast for Twhere
T: Any,
§fn into_any(self: Box<T>) -> Box<dyn Any>
fn into_any(self: Box<T>) -> Box<dyn Any>
Convert
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Convert
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
Convert
&Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s.§fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert
&mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s.