cairo_lang_lowering/scc/
mod.rs

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
use cairo_lang_utils::graph_algos::graph_node::GraphNode;
use cairo_lang_utils::graph_algos::strongly_connected_components::compute_scc;

use crate::DependencyType;
use crate::db::LoweringGroup;
use crate::ids::FunctionWithBodyId;

/// Query implementation of [crate::db::LoweringGroup::function_with_body_scc].
pub fn function_with_body_scc(
    db: &dyn LoweringGroup,
    function_id: FunctionWithBodyId,
    dependency_type: DependencyType,
) -> Vec<FunctionWithBodyId> {
    compute_scc(&FunctionWithBodyNode {
        function_with_body_id: function_id,
        dependency_type,
        db: db.upcast(),
    })
}

/// A node to use in the SCC computation.
#[derive(Clone)]
struct FunctionWithBodyNode<'a> {
    function_with_body_id: FunctionWithBodyId,
    dependency_type: DependencyType,
    db: &'a dyn LoweringGroup,
}
impl GraphNode for FunctionWithBodyNode<'_> {
    type NodeId = FunctionWithBodyId;

    fn get_neighbors(&self) -> Vec<Self> {
        self.db
            .function_with_body_direct_function_with_body_callees(
                self.function_with_body_id,
                self.dependency_type,
            )
            .unwrap_or_default()
            .into_iter()
            .map(|function_with_body_id| FunctionWithBodyNode {
                function_with_body_id,
                dependency_type: self.dependency_type,
                db: self.db,
            })
            .collect()
    }

    fn get_id(&self) -> Self::NodeId {
        self.function_with_body_id
    }
}