fluidattacks-blends-domain 0.23.0

Blends functional core: pure AST graph to syntax graph (no_std)
Documentation 
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use crate::{
    query::{adj_ast, match_ast_d, pred_ast},
    syntax::{builders::parameter::build_parameter_node, SyntaxGraphArgs, SyntaxGraphError},
    utilities::text_nodes::node_to_str,
    CodeGraph, NodeId,
};
use alloc::borrow::ToOwned;

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

    let val_id = match_ast_d(graph, n_id, "identifier", Some(1));
    let var_name = val_id.map_or_else(|| "UnnamedParam".to_owned(), |id| node_to_str(graph, id));

    let var_type = match_ast_d(graph, n_id, "user_type", Some(1)).map(|id| node_to_str(graph, id));

    let param_modifier = pred_ast(graph, n_id, Some(1))
        .first()
        .and_then(|&parent_id| {
            adj_ast(graph, parent_id, Some(1), &[])
                .windows(2)
                .find_map(|window| match window {
                    [prev, current]
                        if *current == n_id
                            && graph.label_type(*prev) == Some("parameter_modifiers") =>
                    {
                        Some(node_to_str(graph, *prev))
                    }
                    _ => None,
                })
        });

    build_parameter_node(
        args,
        n_id,
        Some(var_name),
        var_type,
        val_id,
        &[],
        None,
        param_modifier,
    )
    .map(Some)
}