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Struct std::fmt::Error

pub struct Error;

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.

Examples

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");
}

Trait Implementations

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impl Clone for Error
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fn clone(&self) -> Error
Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source. Read more
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impl Debug for Error
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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
Formats the value using the given formatter. Read more
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impl Default for Error
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fn default() -> Error
Returns the “default value” for a type. Read more
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impl Display for Error
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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>
Formats the value using the given formatter. Read more
1.11.0source 
impl Error for Error
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fn description(&self) -> &str
👎Deprecated since 1.42.0: use the Display impl or to_string()
Read more
1.30.0source 
fn source(&self) -> Option<&(dyn Error + 'static)>
The lower-level source of this error, if any. Read more
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fn cause(&self) -> Option<&dyn Error>
👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting
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fn provide<'a>(&'a self, request: &mut Request<'a>)
🔬This is a nightly-only experimental API. (error_generic_member_access #99301)
Provides type based access to context intended for error reports. Read more
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impl Hash for Error
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fn hash<__H>(&self, state: &mut __H)
where
    __H: Hasher,
Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where
    H: Hasher,
    Self: Sized,
Feeds a slice of this type into the given Hasher. Read more
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impl Ord for Error
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fn cmp(&self, other: &Error) -> Ordering
This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where
    Self: Sized,
Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where
    Self: Sized,
Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where
    Self: Sized + PartialOrd,
Restrict a value to a certain interval. Read more
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impl PartialEq for Error
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fn eq(&self, other: &Error) -> bool
This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for Error
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fn partial_cmp(&self, other: &Error) -> Option<Ordering>
This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool
This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool
This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Copy for Error
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impl Eq for Error
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impl StructuralEq for Error
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impl StructuralPartialEq for Error

Auto Trait Implementations

impl RefUnwindSafe for Error
impl Send for Error
impl Sync for Error
impl Unpin for Error
impl UnwindSafe for Error

Blanket Implementations

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impl<T> Any for T
where
    T: 'static + ?Sized,
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fn type_id(&self) -> TypeId
Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where
    T: ?Sized,
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fn borrow(&self) -> &T
Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where
    T: ?Sized,
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fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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impl<T> From<T> for T
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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where
    U: From<T>,
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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where
    T: Clone,
 
type Owned = T
The resulting type after obtaining ownership.
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fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)
Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where
    T: Display + ?Sized,
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default fn to_string(&self) -> String
Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where
    U: Into<T>,
 
type Error = Infallible
The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
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impl<T, U> TryInto<U> for T
where
    U: TryFrom<T>,
 
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/fmt/struct.Error.html