Trait Warn

pub trait Warn
where
    Self: Sized,
{
    type Value;

    // Required method
    fn or_warn<H: Handler>(
        self,
        handler: &mut H,
        level: Problem,
        message: &str,
    ) -> Option<Self::Value>;

    // Provided method
    fn or_print(self, level: Problem, message: &str) -> Option<Self::Value> { ... }
}

Sugar for logging errors in results.

Required Associated Types

type Value

Required Methods

fn or_warn<H: Handler>( self, handler: &mut H, level: Problem, message: &str, ) -> Option<Self::Value>

Approach 3.

Provided Methods

fn or_print(self, level: Problem, message: &str) -> Option<Self::Value>

Approach 2.

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> Warn for Option<T>

type Value = T

fn or_warn<H: Handler>( self, handler: &mut H, level: Problem, message: &str, ) -> Option<T>

impl<T, E: Display> Warn for Result<T, E>

type Value = T

fn or_warn<H: Handler>( self, handler: &mut H, level: Problem, message: &str, ) -> Option<T>

Implementors