fluidattacks-blends-domain 0.26.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::{
    query::{adj_ast, match_ast},
    syntax::{builders::annotation::build_annotation_node, SyntaxGraphArgs, SyntaxGraphError},
    utilities::text_nodes::node_to_str,
    NodeId,
};
use alloc::string::String;

pub fn reader(
    args: &mut SyntaxGraphArgs<'_>,
    n_id: NodeId,
) -> Result<Option<NodeId>, SyntaxGraphError> {
    let graph = args.ast_graph;

    let matches = match_ast(
        graph,
        n_id,
        &["constructor_invocation", "user_type"],
        Some(1),
    );

    let mut annotation_name = String::from("@");
    let mut args_id = None;

    if let Some(constructor_id) = matches.get("constructor_invocation").copied().flatten() {
        let children = adj_ast(graph, constructor_id, Some(1), &[]);
        if let Some(&name_id) = children.first() {
            annotation_name.push_str(&node_to_str(graph, name_id));
            args_id = children.get(1).copied();
        }
    } else if let Some(user_type_id) = matches.get("user_type").copied().flatten() {
        annotation_name.push_str(&node_to_str(graph, user_type_id));
    }

    build_annotation_node(args, n_id, annotation_name, args_id).map(Some)
}