.. _program_listing_file__tmp_ws_src_proxsuite_include_proxsuite_linalg_veg_util_defer.hpp:

Program Listing for File defer.hpp
==================================

|exhale_lsh| :ref:`Return to documentation for file <file__tmp_ws_src_proxsuite_include_proxsuite_linalg_veg_util_defer.hpp>` (``/tmp/ws/src/proxsuite/include/proxsuite/linalg/veg/util/defer.hpp``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef VEG_DEFER_HPP_SQPONLRGS
   #define VEG_DEFER_HPP_SQPONLRGS
   
   #include "proxsuite/linalg/veg/type_traits/constructible.hpp"
   #include "proxsuite/linalg/veg/type_traits/invocable.hpp"
   #include "proxsuite/linalg/veg/internal/prologue.hpp"
   
   namespace proxsuite {
   namespace linalg {
   namespace veg {
   template<typename Fn>
   struct VEG_NODISCARD Defer
   {
     Fn fn;
     constexpr Defer(Fn _fn) VEG_NOEXCEPT_IF(VEG_CONCEPT(nothrow_movable<Fn>))
       : fn(VEG_FWD(_fn))
     {
     }
     Defer(Defer const&) = delete;
     Defer(Defer&&) VEG_NOEXCEPT = delete;
     auto operator=(Defer const&) -> Defer& = delete;
     auto operator=(Defer&&) VEG_NOEXCEPT->Defer& = delete;
     VEG_CPP20(constexpr)
     VEG_INLINE ~Defer()
       VEG_NOEXCEPT_IF(VEG_NOEXCEPT_IF(VEG_CONCEPT(nothrow_fn_once<Fn, void>)))
     {
       VEG_FWD(fn)();
     }
   };
   VEG_CPP17(
   
     template<typename Fn> Defer(Fn) -> Defer<Fn>;
   
   )
   
   namespace nb {
   struct defer
   {
     VEG_TEMPLATE(typename Fn,
                  requires(VEG_CONCEPT(fn_once<Fn, void>)),
                  VEG_INLINE VEG_CPP20(constexpr) auto
                  operator(),
                  (fn, Fn&&))
     const VEG_NOEXCEPT_IF(VEG_CONCEPT(nothrow_movable<Fn>))
       ->proxsuite::linalg::veg::Defer<Fn>
     {
       return { VEG_FWD(fn) };
     }
   };
   } // namespace nb
   VEG_NIEBLOID(defer);
   } // namespace veg
   } // namespace linalg
   } // namespace proxsuite
   
   #include "proxsuite/linalg/veg/internal/epilogue.hpp"
   #endif /* end of include guard VEG_DEFER_HPP_SQPONLRGS */