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#ifndef utils_hh_INCLUDED
#define utils_hh_INCLUDED
#include "exception.hh"
#include "assert.hh"
#include <memory>
#include <algorithm>
namespace Kakoune
{
template<typename Container>
struct ReversedContainer
{
ReversedContainer(Container& container) : container(container) {}
Container& container;
decltype(container.rbegin()) begin() { return container.rbegin(); }
decltype(container.rend()) end() { return container.rend(); }
};
template<typename Container>
ReversedContainer<Container> reversed(Container& container)
{
return ReversedContainer<Container>(container);
}
template<typename T>
bool operator== (const std::unique_ptr<T>& lhs, T* rhs)
{
return lhs.get() == rhs;
}
template<typename T, typename F>
class AutoRaii
{
public:
AutoRaii(T* resource, F cleanup)
: m_resource(resource), m_cleanup(cleanup) {}
AutoRaii(AutoRaii&& other) : m_resource(other.m_resource),
m_cleanup(other.m_cleanup)
{ other.m_resource = nullptr; }
AutoRaii(const AutoRaii&) = delete;
AutoRaii& operator=(const AutoRaii&) = delete;
~AutoRaii() { if (m_resource) m_cleanup(m_resource); }
operator T*() { return m_resource; }
private:
T* m_resource;
F m_cleanup;
};
template<typename T, typename F>
AutoRaii<T, F> auto_raii(T* resource, F cleanup)
{
return AutoRaii<T, F>(resource, cleanup);
}
template<typename T>
class Singleton
{
public:
Singleton(const Singleton&) = delete;
Singleton& operator=(const Singleton&) = delete;
static T& instance()
{
assert (ms_instance);
return *ms_instance;
}
static void delete_instance()
{
if (ms_instance)
delete ms_instance;
}
protected:
Singleton()
{
assert(not ms_instance);
ms_instance = static_cast<T*>(this);
}
~Singleton()
{
assert(ms_instance == this);
ms_instance = nullptr;
}
private:
static T* ms_instance;
};
template<typename T>
T* Singleton<T>::ms_instance = nullptr;
template<typename Container, typename T>
auto find(Container& container, const T& value) -> decltype(container.begin())
{
return std::find(container.begin(), container.end(), value);
}
template<typename Container, typename T>
bool contains(const Container& container, const T& value)
{
return find(container, value) != container.end();
}
inline std::string str_to_str(const std::string& str)
{
return str;
}
template<typename T>
class OnScopeEnd
{
public:
OnScopeEnd(T func) : m_func(func) {}
~OnScopeEnd() { m_func(); }
private:
T m_func;
};
template<typename T>
OnScopeEnd<T> on_scope_end(T t)
{
return OnScopeEnd<T>(t);
}
}
#endif // utils_hh_INCLUDED
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