fluidattacks-blends-domain 0.17.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::{
    query::{adj_ast, label_text, match_ast_d},
    syntax::{
        builders::member_access::build_member_access_node, SyntaxGraphArgs, SyntaxGraphError,
    },
    NodeId,
};

use alloc::borrow::ToOwned;

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, Some(1), &[]);

    let relative_n_id = c_ids
        .first()
        .copied()
        .ok_or(SyntaxGraphError::UnexpectedAstShape)?;
    let member_n_id = c_ids
        .last()
        .copied()
        .ok_or(SyntaxGraphError::UnexpectedAstShape)?;

    let expression = label_text(graph, member_n_id).unwrap_or("");

    let obj_id = match_ast_d(graph, relative_n_id, "self", Some(1)).map_or(member_n_id, |id| id);

    build_member_access_node(args, n_id, "self".to_owned(), expression.to_owned(), obj_id).map(Some)
}