Struct enso_prelude::fmt::DebugTuple 1.2.0[−][src]
#[must_use = "must eventually call `finish()` on Debug builders"]pub struct DebugTuple<'a, 'b> where
'b: 'a, { /* fields omitted */ }
Expand description
A struct to help with fmt::Debug
implementations.
This is useful when you wish to output a formatted tuple as a part of your
Debug::fmt
implementation.
This can be constructed by the Formatter::debug_tuple
method.
Examples
use std::fmt; struct Foo(i32, String); impl fmt::Debug for Foo { fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result { fmt.debug_tuple("Foo") .field(&self.0) .field(&self.1) .finish() } } assert_eq!( format!("{:?}", Foo(10, "Hello World".to_string())), "Foo(10, \"Hello World\")", );
Implementations
impl<'a, 'b> DebugTuple<'a, 'b> where
'b: 'a,
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impl<'a, 'b> DebugTuple<'a, 'b> where
'b: 'a,
[src]pub fn field(&mut self, value: &dyn Debug) -> &mut DebugTuple<'a, 'b>
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pub fn field(&mut self, value: &dyn Debug) -> &mut DebugTuple<'a, 'b>
[src]Adds a new field to the generated tuple struct output.
Examples
use std::fmt; struct Foo(i32, String); impl fmt::Debug for Foo { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { fmt.debug_tuple("Foo") .field(&self.0) // We add the first field. .field(&self.1) // We add the second field. .finish() // We're good to go! } } assert_eq!( format!("{:?}", Foo(10, "Hello World".to_string())), "Foo(10, \"Hello World\")", );
pub fn finish(&mut self) -> Result<(), Error>
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pub fn finish(&mut self) -> Result<(), Error>
[src]Finishes output and returns any error encountered.
Examples
use std::fmt; struct Foo(i32, String); impl fmt::Debug for Foo { fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result { fmt.debug_tuple("Foo") .field(&self.0) .field(&self.1) .finish() // You need to call it to "finish" the // tuple formatting. } } assert_eq!( format!("{:?}", Foo(10, "Hello World".to_string())), "Foo(10, \"Hello World\")", );
Auto Trait Implementations
impl<'a, 'b> !RefUnwindSafe for DebugTuple<'a, 'b>
impl<'a, 'b> !Send for DebugTuple<'a, 'b>
impl<'a, 'b> !Sync for DebugTuple<'a, 'b>
impl<'a, 'b> Unpin for DebugTuple<'a, 'b> where
'b: 'a,
'b: 'a,
impl<'a, 'b> !UnwindSafe for DebugTuple<'a, 'b>
Blanket Implementations
impl<T> BorrowMut<T> for T where
T: ?Sized,
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impl<T> BorrowMut<T> for T where
T: ?Sized,
[src]pub fn borrow_mut(&mut self) -> &mut T
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pub fn borrow_mut(&mut self) -> &mut T
[src]Mutably borrows from an owned value. Read more
impl<T> Same<T> for T
impl<T> Same<T> for T
type Output = T
type Output = T
Should always be Self
impl<SS, SP> SupersetOf<SS> for SP where
SS: SubsetOf<SP>,
impl<SS, SP> SupersetOf<SS> for SP where
SS: SubsetOf<SP>,
pub fn to_subset(&self) -> Option<SS>
pub fn to_subset(&self) -> Option<SS>
The inverse inclusion map: attempts to construct self
from the equivalent element of its
superset. Read more
pub fn is_in_subset(&self) -> bool
pub fn is_in_subset(&self) -> bool
Checks if self
is actually part of its subset T
(and can be converted to it).
pub fn to_subset_unchecked(&self) -> SS
pub fn to_subset_unchecked(&self) -> SS
Use with care! Same as self.to_subset
but without any property checks. Always succeeds.
pub fn from_subset(element: &SS) -> SP
pub fn from_subset(element: &SS) -> SP
The inclusion map: converts self
to the equivalent element of its superset.