Upsilon/Upsilon/BaseTypes/LuaTable.cs

using System.Collections.Generic;
using System.Linq;
using Upsilon.Binder;

namespace Upsilon.BaseTypes
{
    public class LuaTable : LuaType, IIndexable
    {
        private readonly Dictionary<string, VariableSymbol> _variableLookup;
        private readonly Dictionary<VariableSymbol, LuaType> _map;
        public int EvaluatorIdentifier { get; }

        public LuaTable(Dictionary<VariableSymbol, LuaType> map, int scopeIdentifier)
        {
            _map = map;
            EvaluatorIdentifier = scopeIdentifier;
            _variableLookup = map.ToDictionary(x => x.Key.Name, x => x.Key);
        }


        public override Type Type => Type.Table;
        public override object ToCSharpObject()
        {
            return _map.Where(x => !x.Key.Local).ToDictionary(x => x.Key.Name, x => x.Value.ToCSharpObject());
        }


        public LuaType Get(string s, int scopeIdentifier)
        {
            if (!_variableLookup.TryGetValue(s, out var variableSymbol))
                return new LuaNull();
            if (EvaluatorIdentifier != scopeIdentifier && variableSymbol.Local)
                return new LuaNull();
            return _map[variableSymbol];
        }

    }
}