mirror of
https://github.com/matrix-construct/construct
synced 2024-11-06 13:58:56 +01:00
85 lines
2 KiB
C
85 lines
2 KiB
C
|
// Matrix Construct
|
||
|
|
//
|
||
|
|
// Copyright (C) Matrix Construct Developers, Authors & Contributors
|
||
|
|
// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
|
||
|
|
//
|
||
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
||
|
|
// purpose with or without fee is hereby granted, provided that the above
|
||
|
|
// copyright notice and this permission notice is present in all copies. The
|
||
|
|
// full license for this software is available in the LICENSE file.
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
#define HAVE_IRCD_CONF_H
|
||
|
|
|
||
|
|
namespace ircd::conf
|
||
|
|
{
|
||
|
|
template<class T = void> struct item; // doesn't exist
|
||
|
|
template<class T> struct value; // abstraction for carrying item value
|
||
|
|
template<> struct item<void>; // base class of all conf items
|
||
|
|
template<> struct item<seconds>;
|
||
|
|
|
||
|
|
IRCD_EXCEPTION(ircd::error, error)
|
||
|
|
|
||
|
|
extern const std::string &config; //TODO: X
|
||
|
|
|
||
|
|
void init(const string_view &configfile);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// Conf item base class. You don't create this directly; use one of the
|
||
|
|
/// derived templates instead.
|
||
|
|
template<>
|
||
|
|
struct ircd::conf::item<void>
|
||
|
|
:instance_list<ircd::conf::item<>>
|
||
|
|
{
|
||
|
|
json::strung feature_;
|
||
|
|
json::object feature;
|
||
|
|
string_view name;
|
||
|
|
|
||
|
|
virtual bool refresh();
|
||
|
|
|
||
|
|
item(const json::members &);
|
||
|
|
virtual ~item() noexcept;
|
||
|
|
};
|
||
|
|
|
||
|
|
/// Conf item value abstraction. If possible, the conf item will also
|
||
|
|
/// inherit from this template to deduplicate functionality between
|
||
|
|
/// conf items which contain similar classes of values.
|
||
|
|
template<class T>
|
||
|
|
struct ircd::conf::value
|
||
|
|
:conf::item<>
|
||
|
|
{
|
||
|
|
using value_type = T;
|
||
|
|
|
||
|
|
T _value;
|
||
|
|
std::function<bool (T &)> refresher;
|
||
|
|
|
||
|
|
operator const T &() const
|
||
|
|
{
|
||
|
|
return _value;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool refresh() override
|
||
|
|
{
|
||
|
|
return refresher? refresher(_value) : false;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<class U>
|
||
|
|
value(const json::members &memb, U&& t)
|
||
|
|
:conf::item<>{memb}
|
||
|
|
,_value{std::forward<U>(t)}
|
||
|
|
{}
|
||
|
|
|
||
|
|
value(const json::members &memb = {})
|
||
|
|
:conf::item<>{memb}
|
||
|
|
,_value{feature.get<T>("default", T{})}
|
||
|
|
{}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<>
|
||
|
|
struct ircd::conf::item<ircd::seconds>
|
||
|
|
:conf::value<seconds>
|
||
|
|
{
|
||
|
|
using value_type = seconds;
|
||
|
|
using value::value;
|
||
|
|
};
|