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

If it is Err, the method panics.

Examples

use chain_assertions::prelude::*;

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

use chain_assertions::prelude::*;

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

fn debug_assert_ok(self) -> Self

Asserts the Result is Ok only in debug builds.

Panics

If it is Err and debug_assertions are enabled, the method panics. If debug_assertions are disabled, the method is a no-op even if it is Err.

Examples

use chain_assertions::prelude::*;

let x: Result<i32, &str> = Ok(21);
let x = x.debug_assert_ok().map(|v| v * 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