fluidattacks-blends-domain 0.6.1

Blends functional core: pure AST graph to syntax graph (no_std)
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

use alloc::string::String;

use crate::query::match_ast_d;
use crate::syntax::builders::parameter::build_parameter_node;
use crate::syntax::fields::python::{default_parameter, typed_default_parameter, typed_parameter};
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::utilities::text_nodes::node_to_str;
use crate::{CodeGraph, NodeId};

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let (type_id, name_id, value_id) = match graph.label_type(n_id) {
        Some("typed_parameter") => (
            args.required_field_alt(n_id, typed_parameter::TYPE).ok(),
            None,
            None,
        ),
        Some("default_parameter") => (
            None,
            args.required_field_alt(n_id, default_parameter::NAME).ok(),
            args.required_field_alt(n_id, default_parameter::VALUE).ok(),
        ),
        Some("typed_default_parameter") => (
            args.required_field_alt(n_id, typed_default_parameter::TYPE)
                .ok(),
            args.required_field_alt(n_id, typed_default_parameter::NAME)
                .ok(),
            args.required_field_alt(n_id, typed_default_parameter::VALUE)
                .ok(),
        ),
        _ => (None, None, None),
    };

    let var_type = type_id.map(|type_id| node_to_str(graph, type_id));
    let identifier_id = name_id.or_else(|| match_ast_d(graph, n_id, "identifier", Some(1)));
    let var_name =
        identifier_id.map_or_else(|| String::from("UnnamedVar"), |id| node_to_str(graph, id));

    build_parameter_node(
        args,
        n_id,
        Some(var_name),
        var_type,
        value_id,
        &[],
        None,
        None,
    )
    .map(Some)
}