Trait ResultBacktrace

pub trait ResultBacktrace {
    type Value;
    type Error;

    // Required methods
    fn map_trace<E>(
        self,
        f: impl FnOnce(Self::Error) -> E,
    ) -> Result<Self::Value, Backtraced<E>>;
    fn map_trace_into<E: From<Self::Error>>(
        self,
    ) -> Result<Self::Value, Backtraced<E>>;
    fn backtrace(self) -> Self;
}

Required Associated Types

type Value

type Error

Required Methods

fn map_trace<E>( self, f: impl FnOnce(Self::Error) -> E, ) -> Result<Self::Value, Backtraced<E>>

Maps the traced error. Use this instead of map_err.

fn map_trace_into<E: From<Self::Error>>( self, ) -> Result<Self::Value, Backtraced<E>>

Convert the error type using into().

use std::io;
use error_backtrace::{Result, ResultBacktrace};

struct MyError(io::Error);
 
impl From<io::Error> for MyError {
    fn from(value: io::Error) -> Self {
        Self(value)
    }
}
 
fn convert(res: Result<(), io::Error>) -> Result<(), MyError> {
    res.map_trace_into()
}

fn backtrace(self) -> Self

Print the current backtrace.

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> ResultBacktrace for Result<T, Backtraced<E>>

type Value = T

type Error = E

fn map_trace<F>( self, f: impl FnOnce(Self::Error) -> F, ) -> Result<Self::Value, Backtraced<F>>

fn map_trace_into<F: From<Self::Error>>( self, ) -> Result<Self::Value, Backtraced<F>>

fn backtrace(self) -> Self

Implementors