public (IObject, bool) Get(string name)
{
if (_store.ContainsKey(name))
{
return(_store[name], true);
}
if (!_store.ContainsKey(name) && _outer != null)
{
return(_outer.Get(name));
}
return(null, false);
}
private IObject EvalIdentifier(Identifier identifier, Environment env)
{
if (BuiltIns.BuiltInFunctions.ContainsKey(identifier.Value))
{
var builtin = BuiltIns.BuiltInFunctions[identifier.Value];
return(builtin);
}
var(val, ok) = env.Get(identifier.Value);
if (!ok)
{
return new Error()
{
Message = $"identifier not found: {identifier.Value}"
}
}
;
return(val);
}
