cpp-reflection/include/reflection/context.h

//
//  context.h
//  reflection
//
//  Created by Sam Jaffe on 8/6/22.
//  Copyright © 2022 Sam Jaffe. All rights reserved.
//

#pragma once

#include <initializer_list>
#include <utility>

#include "reflection/forward.h"
#include "reflection/object.h"

namespace reflection {
class Context {
public:
  struct Arg : std::pair<std::string_view, Object> {
    template <typename T> Arg(std::string_view id, T &&value)
        : pair(id, Object(std::forward<T>(value), std::string(id))) {}
    Arg(Object &&obj) : pair("", std::move(obj)) { first = second.name(); }
  };
  
public:
  explicit Context(std::initializer_list<Arg> data) : data_(data.begin(), data.end()) {}

  Object const & get(std::string_view id) const { return data_.at(id); }
  bool has(std::string_view id) const { return data_.count(id); }

  template <typename C,
            typename = std::enable_if_t<std::is_constructible_v<
                std::string_view, decltype(*std::begin(std::declval<C>()))>>>
  Object get(C const & container) const {
    return Object::get(get(*std::begin(container)), ++std::begin(container),
                       std::end(container));
  }

private:
  std::unordered_map<std::string_view, Object> data_;
};
}