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35 /*! \libinternal \file
37 * Declares utilities for template metaprogramming
39 * \author Roland Schulz <roland.schulz@intel.com>
42 * \ingroup module_utility
44 #ifndef GMX_UTILITY_TEMPLATE_MP_H
45 #define GMX_UTILITY_TEMPLATE_MP_H
52 #include "gromacs/compat/mp11.h"
57 template<class Function>
58 auto dispatchTemplatedFunction(Function&& f)
60 return std::forward<Function>(f)();
63 /** \internal \brief Helper function to select appropriate template based on runtime values.
65 * Can use enums or booleans for template parameters.
66 * These enums must have a member \c Count indicating the total number of valid values.
76 template<bool p0, Options p1, Options p2>
79 bool bar(bool p0, Options p1, Options p2, int i) {
80 return dispatchTemplatedFunction(
81 [=](auto p0, auto p1, auto p2) {
82 return foo<p0, p1, p2>(i);
88 template<class Function, class Enum, class... Enums>
89 auto dispatchTemplatedFunction(Function&& f, Enum e, Enums... es)
91 return dispatchTemplatedFunction(
93 return compat::mp_with_index<size_t(Enum::Count)>(size_t(e), [&](auto e_) {
94 return std::forward<Function>(f)(
95 std::integral_constant<Enum, static_cast<Enum>(size_t(e_))>(), es_...);
101 template<class Function, class... Enums>
102 auto dispatchTemplatedFunction(Function&& f, bool e, Enums... es)
104 return dispatchTemplatedFunction(
106 return compat::mp_with_index<2>(size_t(e), [&](auto e_) {
107 return std::forward<Function>(f)(std::bool_constant<static_cast<bool>(e_)>(), es_...);
115 #endif // GMX_UTILITY_TEMPLATE_MP_H