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// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
// Copyright 2008-2016 National ICT Australia (NICTA)
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ------------------------------------------------------------------------
//! \addtogroup restrictors
//! @{
// structures for template based restrictions of input/output arguments
// (part of the SFINAE approach)
// http://en.wikipedia.org/wiki/SFINAE
template<typename T> struct arma_scalar_only { };
template<> struct arma_scalar_only< u8 > { typedef u8 result; };
template<> struct arma_scalar_only< s8 > { typedef s8 result; };
template<> struct arma_scalar_only< u16 > { typedef u16 result; };
template<> struct arma_scalar_only< s16 > { typedef s16 result; };
template<> struct arma_scalar_only< u32 > { typedef u32 result; };
template<> struct arma_scalar_only< s32 > { typedef s32 result; };
template<> struct arma_scalar_only< u64 > { typedef u64 result; };
template<> struct arma_scalar_only< s64 > { typedef s64 result; };
template<> struct arma_scalar_only< ulng_t > { typedef ulng_t result; };
template<> struct arma_scalar_only< slng_t > { typedef slng_t result; };
template<> struct arma_scalar_only< float > { typedef float result; };
template<> struct arma_scalar_only< double > { typedef double result; };
template<> struct arma_scalar_only< cx_float > { typedef cx_float result; };
template<> struct arma_scalar_only< cx_double > { typedef cx_double result; };
template<typename T> struct arma_integral_only { };
template<> struct arma_integral_only< u8 > { typedef u8 result; };
template<> struct arma_integral_only< s8 > { typedef s8 result; };
template<> struct arma_integral_only< u16 > { typedef u16 result; };
template<> struct arma_integral_only< s16 > { typedef s16 result; };
template<> struct arma_integral_only< u32 > { typedef u32 result; };
template<> struct arma_integral_only< s32 > { typedef s32 result; };
template<> struct arma_integral_only< u64 > { typedef u64 result; };
template<> struct arma_integral_only< s64 > { typedef s64 result; };
template<> struct arma_integral_only< ulng_t > { typedef ulng_t result; };
template<> struct arma_integral_only< slng_t > { typedef slng_t result; };
template<typename T> struct arma_unsigned_integral_only { };
template<> struct arma_unsigned_integral_only< u8 > { typedef u8 result; };
template<> struct arma_unsigned_integral_only< u16 > { typedef u16 result; };
template<> struct arma_unsigned_integral_only< u32 > { typedef u32 result; };
template<> struct arma_unsigned_integral_only< u64 > { typedef u64 result; };
template<> struct arma_unsigned_integral_only< ulng_t > { typedef ulng_t result; };
template<typename T> struct arma_signed_integral_only { };
template<> struct arma_signed_integral_only< s8 > { typedef s8 result; };
template<> struct arma_signed_integral_only< s16 > { typedef s16 result; };
template<> struct arma_signed_integral_only< s32 > { typedef s32 result; };
template<> struct arma_signed_integral_only< s64 > { typedef s64 result; };
template<> struct arma_signed_integral_only< slng_t > { typedef slng_t result; };
template<typename T> struct arma_signed_only { };
template<> struct arma_signed_only< s8 > { typedef s8 result; };
template<> struct arma_signed_only< s16 > { typedef s16 result; };
template<> struct arma_signed_only< s32 > { typedef s32 result; };
template<> struct arma_signed_only< s64 > { typedef s64 result; };
template<> struct arma_signed_only< slng_t > { typedef slng_t result; };
template<> struct arma_signed_only< float > { typedef float result; };
template<> struct arma_signed_only< double > { typedef double result; };
template<> struct arma_signed_only< cx_float > { typedef cx_float result; };
template<> struct arma_signed_only< cx_double > { typedef cx_double result; };
template<typename T> struct arma_real_only { };
template<> struct arma_real_only< float > { typedef float result; };
template<> struct arma_real_only< double > { typedef double result; };
template<typename T> struct arma_real_or_cx_only { };
template<> struct arma_real_or_cx_only< float > { typedef float result; };
template<> struct arma_real_or_cx_only< double > { typedef double result; };
template<> struct arma_real_or_cx_only< cx_float > { typedef cx_float result; };
template<> struct arma_real_or_cx_only< cx_double > { typedef cx_double result; };
template<typename T> struct arma_cx_only { };
template<> struct arma_cx_only< cx_float > { typedef cx_float result; };
template<> struct arma_cx_only< cx_double > { typedef cx_double result; };
template<typename T> struct arma_not_cx { typedef T result; };
template<typename T> struct arma_not_cx< std::complex<T> > { };
template<typename T> struct arma_blas_type_only { };
template<> struct arma_blas_type_only< float > { typedef float result; };
template<> struct arma_blas_type_only< double > { typedef double result; };
template<> struct arma_blas_type_only< cx_float > { typedef cx_float result; };
template<> struct arma_blas_type_only< cx_double > { typedef cx_double result; };
template<typename T> struct arma_not_blas_type { typedef T result; };
template<> struct arma_not_blas_type< float > { };
template<> struct arma_not_blas_type< double > { };
template<> struct arma_not_blas_type< cx_float > { };
template<> struct arma_not_blas_type< cx_double > { };
template<typename T> struct arma_op_rel_only { };
template<> struct arma_op_rel_only< op_rel_lt_pre > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_lt_post > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_gt_pre > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_gt_post > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_lteq_pre > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_lteq_post > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_gteq_pre > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_gteq_post > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_eq > { typedef int result; };
template<> struct arma_op_rel_only< op_rel_noteq > { typedef int result; };
template<typename T> struct arma_not_op_rel { typedef int result; };
template<> struct arma_not_op_rel< op_rel_lt_pre > { };
template<> struct arma_not_op_rel< op_rel_lt_post > { };
template<> struct arma_not_op_rel< op_rel_gt_pre > { };
template<> struct arma_not_op_rel< op_rel_gt_post > { };
template<> struct arma_not_op_rel< op_rel_lteq_pre > { };
template<> struct arma_not_op_rel< op_rel_lteq_post > { };
template<> struct arma_not_op_rel< op_rel_gteq_pre > { };
template<> struct arma_not_op_rel< op_rel_gteq_post > { };
template<> struct arma_not_op_rel< op_rel_eq > { };
template<> struct arma_not_op_rel< op_rel_noteq > { };
template<typename T> struct arma_glue_rel_only { };
template<> struct arma_glue_rel_only< glue_rel_lt > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_gt > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_lteq > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_gteq > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_eq > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_noteq > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_and > { typedef int result; };
template<> struct arma_glue_rel_only< glue_rel_or > { typedef int result; };
template<typename T> struct arma_Mat_Col_Row_only { };
template<typename eT> struct arma_Mat_Col_Row_only< Mat<eT> > { typedef Mat<eT> result; };
template<typename eT> struct arma_Mat_Col_Row_only< Col<eT> > { typedef Col<eT> result; };
template<typename eT> struct arma_Mat_Col_Row_only< Row<eT> > { typedef Row<eT> result; };
template<typename T> struct arma_Cube_only { };
template<typename eT> struct arma_Cube_only< Cube<eT> > { typedef Cube<eT> result; };
template<typename T> struct arma_SpMat_SpCol_SpRow_only { };
template<typename eT> struct arma_SpMat_SpCol_SpRow_only< SpMat<eT> > { typedef SpMat<eT> result; };
template<typename eT> struct arma_SpMat_SpCol_SpRow_only< SpCol<eT> > { typedef SpCol<eT> result; };
template<typename eT> struct arma_SpMat_SpCol_SpRow_only< SpRow<eT> > { typedef SpRow<eT> result; };
template<bool> struct enable_if { };
template<> struct enable_if<true> { typedef int result; };
template<bool, typename result_type > struct enable_if2 { };
template< typename result_type > struct enable_if2<true, result_type> { typedef result_type result; };
//! @}
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