std::fmt::Error - Rust
Description: API documentation for the Rust `Error` struct in crate `std`.
Keywords: rust, rustlang, rust-lang, Error

# Struct std::fmt::Error 1.0.0[−][src]

    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();
    match write(&mut output, format_args!("Hello {}!", "world")) {
        Err(fmt::Error) => panic!("An error occurred"),
        _ => (),
    }Run

## Trait Implementations

###

`impl Hash for Error`

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`fn hash<__H>(&self, state: &mut __H) where __H: Hasher,`

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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,`

1.3.0
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Feeds a slice of this type into the given [`Hasher`]. Read more

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`impl Clone for Error`

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`fn clone(&self) -> Error`

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Returns a copy of the value. Read more

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`fn clone_from(&mut self, source: &Self)`

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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>`

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Formats the value using the given formatter. Read more

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`impl PartialOrd<Error> for Error`

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`fn partial_cmp(&self, other: &Error) -> Option<Ordering>`

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This method returns an ordering between `self` and `other` values if one exists. Read more

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`#[must_use] fn lt(&self, other: &Rhs) -> bool`

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This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

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`#[must_use] fn le(&self, other: &Rhs) -> bool`

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This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

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`#[must_use] fn gt(&self, other: &Rhs) -> bool`

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This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

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`#[must_use] fn ge(&self, other: &Rhs) -> bool`

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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 Ord for Error`

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####

`fn cmp(&self, other: &Error) -> Ordering`

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This method returns an `Ordering` between `self` and `other`. Read more

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`fn max(self, other: Self) -> Self`

1.21.0
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Compares and returns the maximum of two values. Read more

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`fn min(self, other: Self) -> Self`

1.21.0
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Compares and returns the minimum of two values. Read more

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`impl Eq for Error`

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`impl PartialEq<Error> for Error`

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`fn eq(&self, other: &Error) -> bool`

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This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

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`#[must_use] fn ne(&self, other: &Rhs) -> bool`

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This method tests for `!=`.

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`impl Copy for Error`

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`impl Default for Error`

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`fn default() -> Error`

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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>`

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Formats the value using the given formatter. Read more

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`impl Error for Error`

1.11.0
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`fn description(&self) -> &str`

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This method is soft-deprecated. Read more

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`fn cause(&self) -> Option<&Error>`

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The lower-level cause of this error, if any. Read more

## Auto Trait Implementations

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`impl Send for Error`

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`impl Sync for Error`

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