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::variable_declaration::build_variable_declaration_node,
        fields::php::assignment_expression, 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 var_n_id = args.required_field_alt(n_id, assignment_expression::LEFT)?;
    let mut value_n_id = args.required_field_alt(n_id, assignment_expression::RIGHT)?;

    let name_n_id = match_ast_d(graph, var_n_id, "name", Some(-1));

    if graph.label_type(value_n_id) == Some("parenthesized_expression") {
        if let Some(&inner) = adj_ast(graph, value_n_id, Some(1), &[]).get(1) {
            value_n_id = inner;
        }
    }

    let var_name = name_n_id
        .and_then(|id| label_text(graph, id))
        .filter(|s| !s.is_empty())
        .map_or_else(|| node_to_str(graph, n_id), str::to_owned);

    let var_id = (graph.label_type(var_n_id) == Some("subscript_expression")).then_some(var_n_id);

    build_variable_declaration_node(args, n_id, var_name, None, Some(value_n_id), var_id, None)
        .map(Some)
}