91606850fd
on_scope_end permits to register a functor to be called at scope
end (either exception thrown or normal scope end). this is usefull
for cleanup code that must be run.
usage:
auto cleaner = on_scope_end([]() { cleanup(); });
134 lines
2.5 KiB
C++
134 lines
2.5 KiB
C++
#ifndef utils_hh_INCLUDED
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#define utils_hh_INCLUDED
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#include "exception.hh"
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#include "assert.hh"
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#include <memory>
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#include <algorithm>
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namespace Kakoune
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{
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template<typename Container>
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struct ReversedContainer
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{
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ReversedContainer(Container& container) : container(container) {}
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Container& container;
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decltype(container.rbegin()) begin() { return container.rbegin(); }
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decltype(container.rend()) end() { return container.rend(); }
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};
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template<typename Container>
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ReversedContainer<Container> reversed(Container& container)
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{
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return ReversedContainer<Container>(container);
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}
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template<typename T>
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bool operator== (const std::unique_ptr<T>& lhs, T* rhs)
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{
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return lhs.get() == rhs;
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}
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template<typename T, typename F>
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class AutoRaii
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{
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public:
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AutoRaii(T* resource, F cleanup)
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: m_resource(resource), m_cleanup(cleanup) {}
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AutoRaii(AutoRaii&& other) : m_resource(other.m_resource),
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m_cleanup(other.m_cleanup)
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{ other.m_resource = nullptr; }
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AutoRaii(const AutoRaii&) = delete;
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AutoRaii& operator=(const AutoRaii&) = delete;
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~AutoRaii() { if (m_resource) m_cleanup(m_resource); }
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operator T*() { return m_resource; }
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private:
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T* m_resource;
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F m_cleanup;
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};
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template<typename T, typename F>
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AutoRaii<T, F> auto_raii(T* resource, F cleanup)
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{
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return AutoRaii<T, F>(resource, cleanup);
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}
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template<typename T>
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class Singleton
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{
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public:
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Singleton(const Singleton&) = delete;
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Singleton& operator=(const Singleton&) = delete;
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static T& instance()
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{
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assert (ms_instance);
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return *ms_instance;
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}
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static void delete_instance()
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{
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if (ms_instance)
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delete ms_instance;
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}
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protected:
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Singleton()
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{
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assert(not ms_instance);
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ms_instance = static_cast<T*>(this);
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}
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~Singleton()
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{
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assert(ms_instance == this);
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ms_instance = nullptr;
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}
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private:
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static T* ms_instance;
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};
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template<typename T>
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T* Singleton<T>::ms_instance = nullptr;
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template<typename Container, typename T>
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bool contains(const Container& container, const T& value)
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{
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return std::find(container.begin(), container.end(), value)
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!= container.end();
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}
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inline std::string str_to_str(const std::string& str)
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{
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return str;
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}
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template<typename T>
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class OnScopeEnd
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{
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public:
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OnScopeEnd(T func) : m_func(func) {}
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~OnScopeEnd() { m_func(); }
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private:
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T m_func;
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};
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template<typename T>
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OnScopeEnd<T> on_scope_end(T t)
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{
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return OnScopeEnd<T>(t);
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}
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}
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#endif // utils_hh_INCLUDED
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