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::rest_pattern::build_rest_pattern_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 identifier_id = if let Some(id) = match_ast(graph, n_id, &["..."], None)
        .get("__0__")
        .copied()
        .flatten()
    {
        id
    } else {
        let c_ids = adj_ast(graph, n_id, None, &[]);
        *c_ids.first().ok_or(SyntaxGraphError::UnexpectedAstShape)?
    };
    build_rest_pattern_node(args, n_id, identifier_id).map(Some)
}