Trait HandleExt 

pub trait HandleExt<T> {
    // Required methods
    fn then<U, F>(self, f: F) -> Result<U>
       where F: FnOnce(T) -> Result<U>;
    fn then_with<U, F>(self, ctx: impl Into<String>, f: F) -> Result<U>
       where F: FnOnce(T) -> Result<U>;
    fn context(self, ctx: impl Into<String>) -> Self;
    fn attach(self, key: &'static str, val: impl IntoValue) -> Self;
}

Extension trait for adding context to Result<T, Handled>.

Required Methods

fn then<U, F>(self, f: F) -> Result<U>

where F: FnOnce(T) -> Result<U>,

Chain another operation, adding a frame on error.

fn then_with<U, F>(self, ctx: impl Into<String>, f: F) -> Result<U>

where F: FnOnce(T) -> Result<U>,

Chain another operation with context message.

fn context(self, ctx: impl Into<String>) -> Self

Add context message to error.

fn attach(self, key: &'static str, val: impl IntoValue) -> Self

Add key-value attachment to error with typed value.

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.

Implementors

impl<T> HandleExt<T> for Result<T>