Struct emf_core_base_rs_ffi::collections::Result

#[repr(C)]
#[must_use]
pub struct Result<T, E> where
    T: Copy + Sized,
    E: Copy + Sized,  { /* fields omitted */ }

A type that represents either a result or an error.

Implementations

impl<T, E> Result<T, E> where
    T: Copy + Sized,
    E: Copy + Sized, 

pub fn new_ok(value: T) -> Self

Creates a new result containing a value.

pub fn new_err(err: E) -> Self

Creates a new result containing an error.

pub fn is_ok(&self) -> bool

Returns true if the result contains a value.

pub fn is_err(&self) -> bool

Returns true if the result contains an error.

pub fn ok(self) -> Option<T>

Converts from Result<T, E> to Option<T> discarding any error.

pub fn err(self) -> Option<E>

Converts from Result<T, E> to Option<E> discarding any value.

pub fn as_ref(&self) -> Result<&T, &E>

Converts from &Result<T, E> to Result<&T, &E>.

pub fn map<U, F>(self, op: F) -> Result<U, E> where
    U: Copy + Sized,
    F: FnOnce(T) -> U, 

Maps the Result<T, E> to Result<U, E> by mapping the ok value.

pub fn map_or<U, F>(self, default: U, f: F) -> U where
    F: FnOnce(T) -> U, 

Maps the ok value of the result by applying f or returning the default value.

pub fn map_or_else<U, D, F>(self, default: D, f: F) -> U where
    D: FnOnce(E) -> U,
    F: FnOnce(T) -> U, 

Maps the Result<T, E> to U by either applying f to the ok value or applying default to the error value.

pub fn map_err<F, O>(self, op: O) -> Result<T, F> where
    F: Copy + Sized,
    O: FnOnce(E) -> F, 

Maps the Result<T, E> to Result<T,F> by mapping the error value.

pub fn unwrap_or(self, default: T) -> T

Returns the contained ok value or a provided default.

pub fn unwrap_or_else<F>(self, op: F) -> T where
    F: FnOnce(E) -> T, 

Returns the contained ok value or computes it from a closure.

pub fn to_result(self) -> Result<T, E>

Maps a Result<T, E> to std::result::Result<T, E>.

impl<T, E> Result<T, E> where
    T: Copy + Sized,
    E: Copy + Sized + Debug, 

pub fn expect(self, msg: &str) -> T

Returns the contained ok value.

Panics

Panics if no ok value is contained, with a panic message provided by the error value.

pub fn unwrap(self) -> T

Returns the contained ok value.

Panics

Panics if no ok value is contained, with a panic message including the passed message, and the content of the error value.

impl<T, E> Result<T, E> where
    T: Copy + Sized + Debug,
    E: Copy + Sized, 

pub fn expect_err(self, msg: &str) -> E

Returns the contained error value.

Panics

Panics if no error value is contained, with a panic message provided by the ok value.

pub fn unwrap_err(self) -> E

Returns the contained error value.

Panics

Panics if no error value is contained, with a panic message including the passed message, and the content of the ok value.

impl<T, E> Result<T, E> where
    T: Copy + Sized + Default,
    E: Copy + Sized, 

pub fn unwrap_or_default(self) -> T

Returns the contained ok value or a default.

Trait Implementations

impl<T: Clone, E: Clone> Clone for Result<T, E> where
    T: Copy + Sized,
    E: Copy + Sized, 

fn clone(&self) -> Result<T, E>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Copy, E: Copy> Copy for Result<T, E> where
    T: Copy + Sized,
    E: Copy + Sized, 

impl<T, E> Debug for Result<T, E> where
    T: Copy + Sized + Debug,
    E: Copy + Sized + Debug, 

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T, E> Eq for Result<T, E> where
    T: Copy + Sized + PartialEq + Eq,
    E: Copy + Sized + PartialEq + Eq, 

impl<T, E> From<Result<T, E>> for Result<T, E> where
    T: Copy + Sized,
    E: Copy + Sized, 

fn from(res: Result<T, E>) -> Self

Performs the conversion.

impl<T, E> Ord for Result<T, E> where
    T: Copy + Sized + PartialOrd + Ord,
    E: Copy + Sized + PartialOrd + Ord, 

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

This method returns an Ordering between self and other.

#[must_use]

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

Compares and returns the maximum of two values.

#[must_use]

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

Compares and returns the minimum of two values.

#[must_use]

pub fn clamp(self, min: Self, max: Self) -> Self

Restrict a value to a certain interval.

impl<T, E> PartialEq<Result<T, E>> for Result<T, E> where
    T: Copy + Sized + PartialEq,
    E: Copy + Sized + PartialEq, 

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

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

#[must_use]

pub fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl<T, E> PartialOrd<Result<T, E>> for Result<T, E> where
    T: Copy + Sized + PartialOrd,
    E: Copy + Sized + PartialOrd, 

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

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

#[must_use]

pub fn lt(&self, other: &Rhs) -> bool

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

#[must_use]

pub fn le(&self, other: &Rhs) -> bool

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

#[must_use]

pub fn gt(&self, other: &Rhs) -> bool

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

#[must_use]

pub fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator.