94 lines
2.2 KiB
C++
94 lines
2.2 KiB
C++
#ifndef STAR_CASTING_HPP
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#define STAR_CASTING_HPP
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#include "StarException.hpp"
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#include "StarFormat.hpp"
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namespace Star {
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STAR_EXCEPTION(PointerConvertException, StarException);
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template <typename Type1, typename Type2>
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bool is(Type2* p) {
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return (bool)dynamic_cast<Type1*>(p);
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}
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template <typename Type1, typename Type2>
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bool is(Type2 const* p) {
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return (bool)dynamic_cast<Type1 const*>(p);
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}
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template <typename Type1, typename Type2>
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bool is(shared_ptr<Type2> const& p) {
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return (bool)dynamic_cast<Type1*>(p.get());
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}
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template <typename Type1, typename Type2>
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bool is(shared_ptr<Type2 const> const& p) {
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return (bool)dynamic_cast<Type1 const*>(p.get());
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}
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template <typename Type1, typename Type2>
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bool ris(Type2& r) {
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return (bool)dynamic_cast<Type1*>(&r);
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}
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template <typename Type1, typename Type2>
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bool ris(Type2 const& r) {
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return (bool)dynamic_cast<Type1 const*>(&r);
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}
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template <typename Type1, typename Type2>
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Type1* as(Type2* p) {
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return dynamic_cast<Type1*>(p);
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}
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template <typename Type1, typename Type2>
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Type1 const* as(Type2 const* p) {
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return dynamic_cast<Type1 const*>(p);
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}
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template <typename Type1, typename Type2>
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shared_ptr<Type1> as(shared_ptr<Type2> const& p) {
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return dynamic_pointer_cast<Type1>(p);
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}
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template <typename Type1, typename Type2>
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shared_ptr<Type1 const> as(shared_ptr<Type2 const> const& p) {
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return dynamic_pointer_cast<Type1 const>(p);
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}
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template <typename Type, typename Ptr>
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auto convert(Ptr const& p) -> decltype(as<Type>(p)) {
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if (!p)
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throw PointerConvertException::format("Could not convert from nullptr to %s", typeid(Type).name());
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else if (auto a = as<Type>(p))
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return a;
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else
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throw PointerConvertException::format("Could not convert from %s to %s", typeid(*p).name(), typeid(Type).name());
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}
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template <typename Type1, typename Type2>
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Type1& rconvert(Type2& r) {
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return *dynamic_cast<Type1*>(&r);
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}
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template <typename Type1, typename Type2>
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Type1 const& rconvert(Type2 const& r) {
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return *dynamic_cast<Type1 const*>(&r);
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}
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template <typename Type>
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weak_ptr<Type> asWeak(shared_ptr<Type> const& p) {
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return weak_ptr<Type>(p);
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}
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template <typename Type>
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weak_ptr<Type const> asWeak(shared_ptr<Type const> const& p) {
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return weak_ptr<Type>(p);
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}
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}
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#endif
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