fluidattacks-blends-domain 0.6.1

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use alloc::vec::Vec;

use crate::query::{adj_ast, match_ast_group_d};
use crate::syntax::builders::argument_list::build_argument_list_node;
use crate::syntax::{SyntaxGraphArgs, SyntaxGraphError};
use crate::NodeId;

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;
    let mut c_ids = match_ast_group_d(graph, n_id, "argument", Some(1));
    if c_ids.is_empty() {
        c_ids = match_ast_group_d(graph, n_id, "attribute_argument", Some(1));
    }
    // Unwrap single-child arguments to their inner expression, keep the rest.
    let args_ids: Vec<NodeId> = c_ids
        .into_iter()
        .map(|id| match adj_ast(graph, id, None, &[]).as_slice() {
            [only] => *only,
            _ => id,
        })
        .collect();
    build_argument_list_node(args, n_id, &args_ids).map(Some)
}