The error type which is returned from formatting a message into a stream.
This type does not support transmission of an error other than that an error
occurred. Any extra information must be arranged to be transmitted through
some other means.
An important thing to remember is that the type fmt::Error
should not be
confused with std::io::Error
or std::error::Error
, which you may also
have in scope.
use std::fmt::{self, write};
let mut output = String::new();
if let Err(fmt::Error) = write(&mut output, format_args!("Hello {}!", "world")) {
panic!("An error occurred");
}
Performs copy-assignment from source
. Read more
Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more
Formats the value using the given formatter. Read more
👎 Deprecated since 1.42.0:
use the Display impl or to_string()
The lower-level source of this error, if any. Read more
🔬 This is a nightly-only experimental API. (backtrace
)
Returns a stack backtrace, if available, of where this error occurred. Read more
👎 Deprecated since 1.33.0:
replaced by Error::source, which can support downcasting
Used when a Serialize
implementation encounters any error
while serializing a type. Read more
#[must_use]
pub fn max(self, other: Self) -> Self
1.21.0[src]
Compares and returns the maximum of two values. Read more
#[must_use]
pub fn min(self, other: Self) -> Self
1.21.0[src]
Compares and returns the minimum of two values. Read more
#[must_use]
pub fn clamp(self, min: Self, max: Self) -> Self
1.50.0[src]
Restrict a value to a certain interval. Read more
This method tests for self
and other
values to be equal, and is used
by ==
. Read more
#[must_use]
pub fn ne(&self, other: &Rhs) -> bool
[src]
This method tests for !=
.
This method returns an ordering between self
and other
values if one exists. Read more
#[must_use]
pub fn lt(&self, other: &Rhs) -> bool
[src]
This method tests less than (for self
and other
) and is used by the <
operator. Read more
#[must_use]
pub fn le(&self, other: &Rhs) -> bool
[src]
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
#[must_use]
pub fn gt(&self, other: &Rhs) -> bool
[src]
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
#[must_use]
pub fn ge(&self, other: &Rhs) -> bool
[src]
This method tests greater than or equal to (for self
and other
) and is used by the >=
operator. Read more
impl<T> Any for T where
T: 'static + ?Sized,
[src]
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
impl<T> ErasedDataStruct for T where
T: Clone + Debug + Any,
pub fn clone_into_box(&self) -> Box<dyn ErasedDataStruct + 'static, Global>
Clone this trait object reference, returning a boxed trait object.
pub fn as_any(&self) -> &(dyn Any + 'static)
impl<T, U> Into<U> for T where
U: From<T>,
[src]
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
🔬 This is a nightly-only experimental API. (toowned_clone_into
)
recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
Converts the given value to a String
. Read more
impl<T, U> TryFrom<U> for T where
U: Into<T>,
[src]
The type returned in the event of a conversion error.
The type returned in the event of a conversion error.