fluidattacks-blends-domain 0.6.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::query::{adj_ast, match_ast};
use crate::syntax::builders::for_each_statement::build_for_each_statement_node;
use crate::syntax::fields::javascript::for_in_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 c_ids = adj_ast(graph, n_id, None, &[]);

    let var_node = if let Ok(id) = args.required_field_alt(n_id, for_in_statement::LEFT) {
        id
    } else {
        *c_ids.first().ok_or(SyntaxGraphError::UnexpectedAstShape)?
    };
    let iterable_item = if let Ok(id) = args.required_field_alt(n_id, for_in_statement::RIGHT) {
        id
    } else {
        *c_ids.last().ok_or(SyntaxGraphError::UnexpectedAstShape)?
    };

    let mut block_id = args.required_field_alt(n_id, for_in_statement::BODY).ok();
    if let Some(id) = block_id {
        if graph.label_type(id) == Some("expression_statement") {
            block_id = match_ast(graph, id, &[], None)
                .get("__0__")
                .copied()
                .flatten();
        }
    }

    build_for_each_statement_node(args, n_id, var_node, iterable_item, block_id).map(Some)
}