Trait AssertSomeExt 

pub trait AssertSomeExt {
    // Required methods
    fn assert_some(self) -> Self;
    fn debug_assert_some(self) -> Self;
}

An extension trait to add the assertion_some methods.

Required Methods

fn assert_some(self) -> Self

Asserts the Option is Some.

Panics

If it is None, the method panics.

Examples

use chain_assertions::prelude::*;

let x: Option<i32> = Some(21);
let x = x.assert_some().map(|v| v * 2);
assert_eq!(x, Some(42));

use chain_assertions::prelude::*;

let x: Option<i32> = None;
let _ = x.assert_some().map(|v| v * 2);
//        ^-- panics here

fn debug_assert_some(self) -> Self

Asserts the Option is Some only in debug builds.

Panics

If it is None and debug_assertions are enabled, the method panics. If debug_assertions are disabled, the method is a no-op even if it is None.

Examples

use chain_assertions::prelude::*;

let x: Option<i32> = Some(21);
let x = x.debug_assert_some().map(|v| v * 2);
assert_eq!(x, Some(42));

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<T> AssertSomeExt for Option<T>

fn assert_some(self) -> Self

fn debug_assert_some(self) -> Self

Implementors