cgp-handler 0.8.0-alpha

A language extension for Rust, with pluggable trait implementations at compile-time.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32

use core::marker::PhantomData;

use cgp::component::UseDelegate;
use cgp::prelude::*;

use crate::UseInputDelegate;

#[cgp_component(TryComputer)]
#[prefix(@cgp.extra.handler in DefaultNamespace)]
#[derive_delegate(UseDelegate<Code>)]
#[derive_delegate(UseInputDelegate<Input>)]
#[use_type(HasErrorType.Error)]
pub trait CanTryCompute<Code, Input> {
    type Output;

    fn try_compute(&self, _code: PhantomData<Code>, input: Input) -> Result<Self::Output, Error>;
}

#[cgp_component(TryComputerRef)]
#[prefix(@cgp.extra.handler in DefaultNamespace)]
#[derive_delegate(UseDelegate<Code>)]
#[derive_delegate(UseInputDelegate<Input>)]
#[use_type(HasErrorType.Error)]
pub trait CanTryComputeRef<Code, Input> {
    type Output;

    fn try_compute_ref(
        &self,
        _code: PhantomData<Code>,
        input: &Input,
    ) -> Result<Self::Output, Error>;
}