vize_l3 0.431.0

L3 - the Davinci reactivity IR (codename Impeto): flat scheduled ops with explicit state and effect edges
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

//! Direct same-owner joins only; no second AST, header or canonical walk.

use super::{DomBuilder, DomExpressionFacts};
use crate::decision::dom::{DomUnsupported, for_head::DomFileForHead, vue::policy::FileReads};
use vize_l0::id::NodeId;
use vize_l2::{
    file::{BindingRef, FileArtifact, ScopeId},
    op::OriginalForOp,
    resolution::ForAliasDeclaration,
};
mod read;
mod runtime;

impl<'owner, 'arena, F: DomExpressionFacts, R: FileReads<'owner, 'arena>>
    DomBuilder<'_, 'owner, 'arena, F, R>
{
    pub(super) fn record_for_head(
        &mut self,
        node: NodeId,
        original: &'owner OriginalForOp<'arena>,
    ) -> bool {
        let Some(file) = self.file else { return false };
        match join(file, node, original) {
            Ok(mut row) => {
                row.read = read::classify(&row);
                if row.read.is_none() {
                    self.reject(
                        node,
                        row.resolution().collection_authored_span(),
                        DomUnsupported::ForCollectionAccess,
                    );
                }
                let runtime = self.prepare_for_runtime(node, &row);
                self.facts.file_for_heads.insert(node, row);
                runtime
            }
            Err(reason) => {
                self.reject(node, original.span, reason);
                false
            }
        }
    }
}

fn join<'owner, 'arena>(
    file: &'owner FileArtifact<'arena>,
    node: NodeId,
    original: &'owner OriginalForOp<'arena>,
) -> Result<DomFileForHead<'owner, 'arena>, DomUnsupported> {
    let head = file
        .for_head_for(original)
        .filter(|head| head.id().node() == node)
        .ok_or(DomUnsupported::FileForHead)?;
    let resolution = head.resolution().ok_or(DomUnsupported::FileForHead)?;
    if !core::ptr::eq(
        resolution
            .input()
            .operand()
            .syntax()
            .source()
            .authored_root(),
        file.artifact().source(),
    ) {
        return Err(DomUnsupported::FileForHead);
    }
    let enclosing = head.enclosing_scope().ok_or(DomUnsupported::FileScope)?;
    let scope = head.scope().ok_or(DomUnsupported::FileScope)?;
    let outer = file
        .scopes()
        .get(enclosing.index() as usize)
        .filter(|row| row.id == enclosing)
        .ok_or(DomUnsupported::FileScope)?;
    let child = file
        .scopes()
        .get(scope.index() as usize)
        .filter(|row| row.id == scope)
        .ok_or(DomUnsupported::FileScope)?;
    if child.parent != Some(outer.id) {
        return Err(DomUnsupported::FileScope);
    }
    if !alias(
        head.value(),
        &resolution.value_declaration(),
        file,
        head.id(),
        scope,
    ) || match (head.key(), resolution.key_declaration()) {
        (None, None) => false,
        (Some(binding), Some(declaration)) => {
            !alias(Some(binding), &declaration, file, head.id(), scope)
        }
        _ => true,
    } {
        return Err(DomUnsupported::FileBinding);
    }
    let occurrence = resolution.collection();
    let collection = file
        .binding(occurrence.binding)
        .ok_or(DomUnsupported::FileBinding)?;
    Ok(DomFileForHead {
        head,
        original,
        resolution,
        collection,
        read: None,
    })
}

fn alias(
    binding: Option<BindingRef<'_, '_>>,
    expected: &ForAliasDeclaration<'_, '_>,
    file: &FileArtifact<'_>,
    origin: vize_l2::op::OriginalForId,
    scope: ScopeId,
) -> bool {
    let Some(binding) = binding else { return false };
    let Some(row) = binding.template_declaration() else {
        return false;
    };
    let declaration = row.declaration();
    let Some(original) = declaration.original() else {
        return false;
    };
    core::ptr::eq(binding.file(), file)
        && core::ptr::eq(row.file(), file)
        && declaration.id() == binding.id()
        && declaration.origin() == origin
        && declaration.scope() == scope
        && core::ptr::eq(original.resolution(), expected.resolution())
        && core::ptr::eq(original.parameter(), expected.parameter())
        && core::ptr::eq(original.pattern(), expected.pattern())
        && original.fact() == expected.fact()
}

#[cfg(test)]
mod tests;