midenc-compile 0.8.1

The compiler frontend for Miden
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171

use alloc::{boxed::Box, rc::Rc, vec::Vec};

use midenc_hir::Context;

use crate::{CompilerResult, CompilerStopped};

/// This trait is implemented by a stage in the compiler
pub trait Stage {
    type Input;
    type Output;

    /// Return true if this stage is disabled
    fn enabled(&self, _context: &Context) -> bool {
        true
    }

    /// Run this stage
    fn run(&mut self, input: Self::Input, context: Rc<Context>) -> CompilerResult<Self::Output>;

    fn next<S>(self, stage: S) -> Chain<Self, S>
    where
        Self: Sized,
        S: Stage<Input = Self::Output>,
    {
        Chain::new(self, stage)
    }

    fn next_optional<S>(self, stage: S) -> ChainOptional<Self, S>
    where
        Self: Sized,
        S: Stage<Input = Self::Output, Output = Self::Output>,
    {
        ChainOptional::new(self, stage)
    }

    fn collect<S, I>(self, stage: S) -> Collect<Self, S, I>
    where
        Self: Sized,
        I: IntoIterator<Item = Self::Input>,
        S: Stage<Input = Vec<Self::Output>>,
    {
        Collect::new(self, stage)
    }
}

impl<I, O> Stage for &mut dyn FnMut(I, Rc<Context>) -> CompilerResult<O> {
    type Input = I;
    type Output = O;

    #[inline]
    fn run(&mut self, input: Self::Input, context: Rc<Context>) -> CompilerResult<Self::Output> {
        (*self)(input, context)
    }
}

impl<I, O> Stage for Box<dyn FnMut(I, Rc<Context>) -> CompilerResult<O>> {
    type Input = I;
    type Output = O;

    #[inline]
    fn run(&mut self, input: Self::Input, context: Rc<Context>) -> CompilerResult<Self::Output> {
        self(input, context)
    }
}

/// This struct is used to chain multiple [Stage] together
pub struct Chain<A, B> {
    a: A,
    b: B,
}
impl<A, B> Chain<A, B> {
    fn new(a: A, b: B) -> Self {
        Self { a, b }
    }
}
impl<A, B> Stage for Chain<A, B>
where
    A: Stage,
    B: Stage<Input = <A as Stage>::Output>,
{
    type Input = <A as Stage>::Input;
    type Output = <B as Stage>::Output;

    fn run<'a>(
        &mut self,
        input: Self::Input,
        context: Rc<Context>,
    ) -> CompilerResult<Self::Output> {
        if !self.a.enabled(&context) {
            return Err(CompilerStopped.into());
        }
        let output = self.a.run(input, context.clone())?;
        if !self.b.enabled(&context) {
            return Err(CompilerStopped.into());
        }
        self.b.run(output, context)
    }
}

/// This struct is used to chain two [Stages] together when the second might be disabled
pub struct ChainOptional<A, B> {
    a: A,
    b: B,
}
impl<A, B> ChainOptional<A, B> {
    fn new(a: A, b: B) -> Self {
        Self { a, b }
    }
}
impl<A, B> Stage for ChainOptional<A, B>
where
    A: Stage,
    B: Stage<Input = <A as Stage>::Output, Output = <A as Stage>::Output>,
{
    type Input = <A as Stage>::Input;
    type Output = <B as Stage>::Output;

    fn run<'a>(
        &mut self,
        input: Self::Input,
        context: Rc<Context>,
    ) -> CompilerResult<Self::Output> {
        if !self.a.enabled(&context) {
            return Err(CompilerStopped.into());
        }
        let output = self.a.run(input, context.clone())?;
        if !self.b.enabled(&context) {
            Ok(output)
        } else {
            self.b.run(output, context)
        }
    }
}

/// This stage joins multiple inputs into a single output
pub struct Collect<A, B, I> {
    spread: A,
    join: B,
    _marker: core::marker::PhantomData<I>,
}
impl<A, B, I> Collect<A, B, I>
where
    A: Stage,
    B: Stage<Input = Vec<<A as Stage>::Output>>,
    I: IntoIterator<Item = <A as Stage>::Input>,
{
    pub fn new(spread: A, join: B) -> Self {
        Self {
            spread,
            join,
            _marker: core::marker::PhantomData,
        }
    }
}
impl<A, B, I> Stage for Collect<A, B, I>
where
    A: Stage,
    B: Stage<Input = Vec<<A as Stage>::Output>>,
    I: IntoIterator<Item = <A as Stage>::Input>,
{
    type Input = I;
    type Output = <B as Stage>::Output;

    fn run(&mut self, inputs: Self::Input, context: Rc<Context>) -> CompilerResult<Self::Output> {
        let mut outputs = Vec::default();
        for input in inputs.into_iter() {
            outputs.push(self.spread.run(input, context.clone())?);
        }
        self.join.run(outputs, context)
    }
}