liquid_error

Trait ResultLiquidExt

Source 
pub trait ResultLiquidExt<T>
where
    Self: Sized,
{
    // Required methods
    fn trace<S>(self, trace: S) -> Result<T>
       where S: Into<Cow<'static, str>>;
    fn trace_with<F>(self, trace: F) -> Result<T>
       where F: FnOnce() -> Cow<'static, str>;
    fn context_key<S>(self, key: S) -> Key<T>
       where S: Into<Cow<'static, str>>;
    fn context_key_with<F>(self, key: F) -> FnKey<T, F>
       where F: FnOnce() -> Cow<'static, str>;
}
Expand description

Add context to a liquid_error::Error.

Required Methods§

Source

fn trace<S>(self, trace: S) -> Result<T>
where S: Into<Cow<'static, str>>,

Add a new stack frame to the liquid_error::Error.

§Example
use liquid_error::Error;
use liquid_error::Result;
use liquid_error::ResultLiquidExt;

let error: Result<i32> = Err(Error::with_msg("Oops"));
let error = error.trace("Within forloop");
Source

fn trace_with<F>(self, trace: F) -> Result<T>
where F: FnOnce() -> Cow<'static, str>,

Add a new stack frame to the liquid_error::Error.

§Example
use liquid_error::Error;
use liquid_error::Result;
use liquid_error::ResultLiquidExt;

let for_var = "foo";
let error: Result<i32> = Err(Error::with_msg("Oops"));
let error = error.trace_with(|| format!("Within forloop with {}", for_var).into());
Source

fn context_key<S>(self, key: S) -> Key<T>
where S: Into<Cow<'static, str>>,

Add state the current stack frame.

§Example
use liquid_error::Error;
use liquid_error::Result;
use liquid_error::ResultLiquidExt;

let for_var = "foo";
let error: Result<i32> = Err(Error::with_msg("Oops"));
let error = error
    .context_key("foo")
    .value("10");
let error = error
    .context_key("foo")
    .value_with(|| format!("{}", for_var).into());
Source

fn context_key_with<F>(self, key: F) -> FnKey<T, F>
where F: FnOnce() -> Cow<'static, str>,

Add state the current stack frame.

§Example
use liquid_error::Error;
use liquid_error::Result;
use liquid_error::ResultLiquidExt;

let for_var = "foo";
let error: Result<i32> = Err(Error::with_msg("Oops"));
let error = error
    .context_key_with(|| format!("{}", 10).into())
    .value("10");
let error = error
    .context_key_with(|| format!("{}", 10).into())
    .value_with(|| format!("{}", for_var).into());

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§