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author | Gael Guennebaud <g.gael@free.fr> | 2016-06-14 15:33:47 +0200 |
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committer | Gael Guennebaud <g.gael@free.fr> | 2016-06-14 15:33:47 +0200 |
commit | 76236cdea402e7236249ab19bd5d8d6ceac1346d (patch) | |
tree | 3b979d88426a94114e8af03877cc47de09862b59 /Eigen/src/Core/util/Meta.h | |
parent | 1004c4df99a3e4a019f05b83badb06f4e2df5ee6 (diff) | |
parent | 4c61f00838202889045ec9e5ad0d60b79f00fec5 (diff) |
merge
Diffstat (limited to 'Eigen/src/Core/util/Meta.h')
-rw-r--r-- | Eigen/src/Core/util/Meta.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h index efb9961ce..a4a491ff8 100644 --- a/Eigen/src/Core/util/Meta.h +++ b/Eigen/src/Core/util/Meta.h @@ -328,6 +328,30 @@ struct result_of<Func(ArgType0,ArgType1)> { enum {FunctorType = sizeof(testFunctor(static_cast<Func*>(0)))}; typedef typename binary_result_of_select<Func, ArgType0, ArgType1, FunctorType>::type type; }; + +template<typename Func, typename ArgType0, typename ArgType1, typename ArgType2, int SizeOf=sizeof(has_none)> +struct ternary_result_of_select {typedef typename internal::remove_all<ArgType0>::type type;}; + +template<typename Func, typename ArgType0, typename ArgType1, typename ArgType2> +struct ternary_result_of_select<Func, ArgType0, ArgType1, ArgType2, sizeof(has_std_result_type)> +{typedef typename Func::result_type type;}; + +template<typename Func, typename ArgType0, typename ArgType1, typename ArgType2> +struct ternary_result_of_select<Func, ArgType0, ArgType1, ArgType2, sizeof(has_tr1_result)> +{typedef typename Func::template result<Func(ArgType0,ArgType1,ArgType2)>::type type;}; + +template<typename Func, typename ArgType0, typename ArgType1, typename ArgType2> +struct result_of<Func(ArgType0,ArgType1,ArgType2)> { + template<typename T> + static has_std_result_type testFunctor(T const *, typename T::result_type const * = 0); + template<typename T> + static has_tr1_result testFunctor(T const *, typename T::template result<T(ArgType0,ArgType1,ArgType2)>::type const * = 0); + static has_none testFunctor(...); + + // note that the following indirection is needed for gcc-3.3 + enum {FunctorType = sizeof(testFunctor(static_cast<Func*>(0)))}; + typedef typename ternary_result_of_select<Func, ArgType0, ArgType1, ArgType2, FunctorType>::type type; +}; #endif /** \internal In short, it computes int(sqrt(\a Y)) with \a Y an integer. |