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ircd:Ⓜ️:event::get: Add templates to return integral values.

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This commit is contained in:
Jason Volk 2019-02-08 07:05:29 -08:00
parent 7ecf7ecb04
commit 1df1897e6d
1 changed files with 43 additions and 0 deletions
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43
include/ircd/m/event/get.h
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@ -27,4 +27,47 @@ namespace ircd::m
const_buffer get(const event::idx &, const string_view &key, const mutable_buffer &out);
const_buffer get(const event::id &, const string_view &key, const mutable_buffer &out);
template<class T>
typename std::enable_if<std::is_integral<T>::value, bool>::type
get(const event::idx &, const string_view &key, T &ret);
template<class T>
typename std::enable_if<std::is_integral<T>::value, T>::type
get(const event::idx &, const string_view &key);
}
template<class T>
typename std::enable_if<std::is_integral<T>::value, T>::type
ircd::m::get(const event::idx &event_idx,
const string_view &key)
{
T ret;
const mutable_buffer buf
{
reinterpret_cast<char *>(&ret), sizeof(ret)
};
get(event_idx, key, buf);
return ret;
}
template<class T>
typename std::enable_if<std::is_integral<T>::value, bool>::type
ircd::m::get(const event::idx &event_idx,
const string_view &key,
T &ret)
{
const mutable_buffer buf
{
reinterpret_cast<char *>(&ret), sizeof(ret)
};
const auto rbuf
{
get(std::nothrow, event_idx, key, buf)
};
assert(size(rbuf) >= sizeof(T));
return !empty(rbuf);
}