[−][src]Struct gfx_backend_vulkan::VK_ENTRY

[+] Show declaration

pub struct VK_ENTRY { /* fields omitted */ }

Methods from Deref<Target = Result<Entry, LoadingError>>

[+] Expand attributes #[must_use = "if you intended to assert that this is ok, consider `.unwrap()` instead"]pub const fn is_ok(&self) -> bool1.0.0[src][−]

Returns true if the result is Ok.

Examples

Basic usage:

let x: Result<i32, &str> = Ok(-3);
assert_eq!(x.is_ok(), true);

let x: Result<i32, &str> = Err("Some error message");
assert_eq!(x.is_ok(), false);

[+] Expand attributes #[must_use = "if you intended to assert that this is err, consider `.unwrap_err()` instead"]pub const fn is_err(&self) -> bool1.0.0[src][−]

Returns true if the result is Err.

Examples

Basic usage:

let x: Result<i32, &str> = Ok(-3);
assert_eq!(x.is_err(), false);

let x: Result<i32, &str> = Err("Some error message");
assert_eq!(x.is_err(), true);

`[+] Expand attributes #[must_use]pub fn contains(&self, x: &U) -> bool where U: PartialEq<T>,` [src][−]

🔬 This is a nightly-only experimental API. (option_result_contains)

Returns true if the result is an Ok value containing the given value.

Examples

#![feature(option_result_contains)]

let x: Result<u32, &str> = Ok(2);
assert_eq!(x.contains(&2), true);

let x: Result<u32, &str> = Ok(3);
assert_eq!(x.contains(&2), false);

let x: Result<u32, &str> = Err("Some error message");
assert_eq!(x.contains(&2), false);

`[+] Expand attributes #[must_use]pub fn contains_err<F>(&self, f: &F) -> bool where F: PartialEq<E>,` [src][−]

🔬 This is a nightly-only experimental API. (result_contains_err)

Returns true if the result is an Err value containing the given value.

Examples

#![feature(result_contains_err)]

let x: Result<u32, &str> = Ok(2);
assert_eq!(x.contains_err(&"Some error message"), false);

let x: Result<u32, &str> = Err("Some error message");
assert_eq!(x.contains_err(&"Some error message"), true);

let x: Result<u32, &str> = Err("Some other error message");
assert_eq!(x.contains_err(&"Some error message"), false);

`pub const fn as_ref(&self) -> Result<&T, &E>`1.0.0[src][−]

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

Produces a new Result, containing a reference into the original, leaving the original in place.

Examples

Basic usage:

let x: Result<u32, &str> = Ok(2);
assert_eq!(x.as_ref(), Ok(&2));

let x: Result<u32, &str> = Err("Error");
assert_eq!(x.as_ref(), Err(&"Error"));

`pub fn iter(&self) -> Iter<'_, T>`1.0.0[src][−]

Returns an iterator over the possibly contained value.

The iterator yields one value if the result is Result::Ok, otherwise none.

Examples

Basic usage:

let x: Result<u32, &str> = Ok(7);
assert_eq!(x.iter().next(), Some(&7));

let x: Result<u32, &str> = Err("nothing!");
assert_eq!(x.iter().next(), None);

`pub fn as_deref(&self) -> Result<&<T as Deref>::Target, &E>`1.47.0[src][−]

Converts from Result<T, E> (or &Result<T, E>) to Result<&<T as Deref>::Target, &E>.

Coerces the Ok variant of the original Result via Deref and returns the new Result.

Examples

let x: Result<String, u32> = Ok("hello".to_string());
let y: Result<&str, &u32> = Ok("hello");
assert_eq!(x.as_deref(), y);

let x: Result<String, u32> = Err(42);
let y: Result<&str, &u32> = Err(&42);
assert_eq!(x.as_deref(), y);