cgp-handler 0.5.0-alpha

Generalized handler interfaces for functional programming
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
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146

use core::ops::Deref;

use cgp_core::prelude::*;

use crate::{
    AsyncComputer, AsyncComputerComponent, AsyncComputerRef, AsyncComputerRefComponent, Computer,
    ComputerComponent, ComputerRef, ComputerRefComponent, Handler, HandlerComponent, HandlerRef,
    HandlerRefComponent, TryComputer, TryComputerComponent, TryComputerRef,
    TryComputerRefComponent,
};

pub struct PromoteRef<Provider>(pub PhantomData<Provider>);

#[cgp_provider]
impl<Context, Code, Input, Target, Provider> Handler<Context, Code, Input> for PromoteRef<Provider>
where
    Context: HasErrorType,
    Provider: HandlerRef<Context, Code, Target>,
    Input: Deref<Target = Target>,
{
    type Output = Provider::Output;

    async fn handle(
        context: &Context,
        tag: PhantomData<Code>,
        input: Input,
    ) -> Result<Self::Output, Context::Error> {
        Provider::handle_ref(context, tag, input.deref()).await
    }
}

#[cgp_provider]
impl<Context, Code, Input, Provider, Output> HandlerRef<Context, Code, Input>
    for PromoteRef<Provider>
where
    Context: HasErrorType,
    Provider: for<'a> Handler<Context, Code, &'a Input, Output = Output>,
{
    type Output = Output;

    async fn handle_ref(
        context: &Context,
        tag: PhantomData<Code>,
        input: &Input,
    ) -> Result<Self::Output, Context::Error> {
        Provider::handle(context, tag, input).await
    }
}

#[cgp_provider]
impl<Context, Code, Input, Target, Provider> AsyncComputer<Context, Code, Input>
    for PromoteRef<Provider>
where
    Provider: AsyncComputerRef<Context, Code, Target>,
    Input: Deref<Target = Target>,
{
    type Output = Provider::Output;

    async fn compute_async(
        context: &Context,
        tag: PhantomData<Code>,
        input: Input,
    ) -> Self::Output {
        Provider::compute_async_ref(context, tag, input.deref()).await
    }
}

#[cgp_provider]
impl<Context, Code, Input, Provider, Output> AsyncComputerRef<Context, Code, Input>
    for PromoteRef<Provider>
where
    Provider: for<'a> AsyncComputer<Context, Code, &'a Input, Output = Output>,
{
    type Output = Output;

    async fn compute_async_ref(
        context: &Context,
        tag: PhantomData<Code>,
        input: &Input,
    ) -> Self::Output {
        Provider::compute_async(context, tag, input).await
    }
}

#[cgp_provider]
impl<Context, Code, Input, Target, Provider> TryComputer<Context, Code, Input>
    for PromoteRef<Provider>
where
    Context: HasErrorType,
    Provider: TryComputerRef<Context, Code, Target>,
    Input: Deref<Target = Target>,
{
    type Output = Provider::Output;

    fn try_compute(
        context: &Context,
        tag: PhantomData<Code>,
        input: Input,
    ) -> Result<Self::Output, Context::Error> {
        Provider::try_compute_ref(context, tag, input.deref())
    }
}

#[cgp_provider]
impl<Context, Code, Input, Provider, Output> TryComputerRef<Context, Code, Input>
    for PromoteRef<Provider>
where
    Context: HasErrorType,
    Provider: for<'a> TryComputer<Context, Code, &'a Input, Output = Output>,
{
    type Output = Output;

    fn try_compute_ref(
        context: &Context,
        tag: PhantomData<Code>,
        input: &Input,
    ) -> Result<Self::Output, Context::Error> {
        Provider::try_compute(context, tag, input)
    }
}

#[cgp_provider]
impl<Context, Code, Input, Target, Provider> Computer<Context, Code, Input> for PromoteRef<Provider>
where
    Provider: ComputerRef<Context, Code, Target>,
    Input: Deref<Target = Target>,
{
    type Output = Provider::Output;

    fn compute(context: &Context, tag: PhantomData<Code>, input: Input) -> Self::Output {
        Provider::compute_ref(context, tag, input.deref())
    }
}

#[cgp_provider]
impl<Context, Code, Input, Provider, Output> ComputerRef<Context, Code, Input>
    for PromoteRef<Provider>
where
    Provider: for<'a> Computer<Context, Code, &'a Input, Output = Output>,
{
    type Output = Output;

    fn compute_ref(context: &Context, tag: PhantomData<Code>, input: &Input) -> Self::Output {
        Provider::compute(context, tag, input)
    }
}