rust/src/test/run-pass/issue-2804.rs

use std;
import io;
import io::writer_util;
import std::map::hashmap;

enum object
{
    bool_value(bool),
    int_value(i64),
}

fn lookup(table: std::map::hashmap<str, std::json::json>, key: str, default: str) -> str
{
    alt table.find(key)
    {
        option::some(std::json::string(s))
        {
            *s
        }
        option::some(value)
        {
            #error["%s was expected to be a string but is a %?", key, value];
            default
        }
        option::none
        {
            default
        }
    }
}

fn add_interface(store: int, managed_ip: str, data: std::json::json) -> (str, object)
{
    alt data
    {
        std::json::dict(interface)
        {
            let name = lookup(interface, "ifDescr", "");
            let label = #fmt["%s-%s", managed_ip, name];

            (label, bool_value(false))
        }
        _
        {
            #error["Expected dict for %s interfaces but found %?", managed_ip, data];
            ("gnos:missing-interface", bool_value(true))
        }
    }
}

fn add_interfaces(store: int, managed_ip: str, device: std::map::hashmap<str, std::json::json>) -> [(str, object)]/~
{
    alt device["interfaces"]
    {
        std::json::list(interfaces)
        {
          do vec::map(*interfaces) |interface| {
                add_interface(store, managed_ip, interface)
          }
        }
        _
        {
            #error["Expected list for %s interfaces but found %?", managed_ip, device["interfaces"]];
            []/~
        }
    }
}

fn main() {}