fluidattacks-blends-domain 0.5.0

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

use crate::query::adj_ast;
use crate::syntax::builders::for_statement::build_for_statement_node;
use crate::syntax::fields::javascript::for_statement;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::{CodeGraph, NodeId};

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let mut body_id = args.required_field_alt(n_id, for_statement::BODY)?;
    if graph.label_type(body_id) == Some("expression_statement") {
        body_id = *adj_ast(graph, body_id, None, &[])
            .first()
            .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    }
    if graph.label_type(body_id) == Some("parenthesized_expression") {
        if let Some(&id) = adj_ast(graph, body_id, None, &[]).get(1) {
            body_id = id;
        }
    }

    let mut initializer_id = args.required_field_alt(n_id, for_statement::INITIALIZER)?;
    if graph.label_type(initializer_id) == Some("expression_statement") {
        initializer_id = *adj_ast(graph, initializer_id, None, &[])
            .first()
            .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    }

    let condition_id = args.required_field_alt(n_id, for_statement::CONDITION)?;
    let increment_id = args.optional_field_alt(n_id, for_statement::INCREMENT);

    build_for_statement_node(
        args,
        n_id,
        Some(initializer_id),
        Some(condition_id),
        increment_id,
        body_id,
    )
    .map(Some)
}