Trait AssertOkExt 

pub trait AssertOkExt {
    // Required methods
    fn assert_ok(self) -> Self;
    fn debug_assert_ok(self) -> Self;
}

An extension trait to add the assertion_ok methods.

Required Methods

fn assert_ok(self) -> Self

Asserts the Result is Ok.

Panics

The method panics if it is Err and passthrough feature is disabled. Otherwise, the method return self as is.

Examples

use chain_assertions::prelude::*;

let x: Result<i32, &str> = Ok(21);
let x = x.assert_ok().map(|x| x * 2);
assert_eq!(x, Ok(42));

use chain_assertions::prelude::*;

let x: Result<i32, &str> = Err("oops");
let _ = x.assert_ok().map(|x| x * 2);
//        ^-- panics here

fn debug_assert_ok(self) -> Self

Asserts the Result is Ok but check only in debug builds.

Panics

The method panics if all following conditions are satisfied:

• It is Err
• debug_assertions is enabled
• passthrough feature is disabled

Otherwise, the method returns self as is.

Examples

use chain_assertions::prelude::*;

let x: Result<i32, &str> = Ok(21);
let x = x.debug_assert_ok().map(|x| x * 2);
assert_eq!(x, Ok(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, E> AssertOkExt for Result<T, E>

where E: Debug,

fn assert_ok(self) -> Self

fn debug_assert_ok(self) -> Self

Implementors