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DEFER: add dismiss functional

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BlackMATov
2020-02-15 06:32:01 +07:00
parent 88b5267e11
commit eff3dc6d9c
1 changed files with 29 additions and 24 deletions
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53
headers/enduro2d/utils/defer.hpp
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@@ -13,49 +13,54 @@ namespace e2d
namespace impl
{
template < typename F >
class defer_impl final : noncopyable {
class defer_impl : noncopyable {
public:
explicit defer_impl(F f)
: f_(std::move(f)) {}
~defer_impl() noexcept {
f_();
}
private:
F f_;
};
template < typename F >
class error_defer_impl final : noncopyable {
public:
explicit error_defer_impl(F f)
: f_(std::move(f))
, exceptions_(std::uncaught_exceptions()) {}
~error_defer_impl() noexcept {
if ( exceptions_ != std::uncaught_exceptions() ) {
virtual ~defer_impl() noexcept {
if ( !dismissed_ ) {
f_();
}
}
void dismiss() noexcept {
dismissed_ = true;
}
private:
F f_;
bool dismissed_{};
};
template < typename F >
class error_defer_impl final : public defer_impl<F> {
public:
explicit error_defer_impl(F f)
: defer_impl<F>(std::move(f))
, exceptions_(std::uncaught_exceptions()) {}
~error_defer_impl() noexcept final {
if ( exceptions_ == std::uncaught_exceptions() ) {
this->dismiss();
}
}
private:
F f_{};
int exceptions_{};
};
template < typename F >
class return_defer_impl final : noncopyable {
class return_defer_impl final : public defer_impl<F> {
public:
explicit return_defer_impl(F f)
: f_(std::move(f))
: defer_impl<F>(std::move(f))
, exceptions_(std::uncaught_exceptions()) {}
~return_defer_impl() noexcept {
if ( exceptions_ == std::uncaught_exceptions() ) {
f_();
~return_defer_impl() noexcept final {
if ( exceptions_ != std::uncaught_exceptions() ) {
this->dismiss();
}
}
private:
F f_{};
int exceptions_{};
};
}