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, match_ast_d},
    syntax::{
        builders::method_invocation::{build_method_invocation_node, DirectChildren},
        SyntaxGraphArgs, SyntaxGraphError,
    },
    CodeGraph, NodeId,
};
use alloc::borrow::ToOwned;

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

    if graph.label_type(n_id) == Some("print_intrinsic") {
        let mut expr_id = None;
        if let Some(&child_id) = adj_ast(graph, n_id, Some(1), &[]).get(1) {
            if graph.label_type(child_id) == Some("parenthesized_expression") {
                expr_id = adj_ast(graph, child_id, Some(1), &[]).get(1).copied();
            }
        }
        let children = DirectChildren {
            expression_id: expr_id,
            ..Default::default()
        };
        return build_method_invocation_node(args, n_id, "print".to_owned(), children, None)
            .map(Some);
    }

    if graph.label_type(n_id) == Some("exit_statement") {
        let args_id = adj_ast(graph, n_id, Some(1), &[]).get(2).copied();
        let children = DirectChildren {
            arguments_id: args_id,
            ..Default::default()
        };
        return build_method_invocation_node(args, n_id, "exit".to_owned(), children, None)
            .map(Some);
    }

    let args_id = match_ast_d(graph, n_id, "echo", Some(1));
    let children = DirectChildren {
        arguments_id: args_id,
        ..Default::default()
    };
    build_method_invocation_node(args, n_id, "echo".to_owned(), children, None).map(Some)
}