In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:106:0,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp: In member function ‘double mlpack::ann::TripletLoss<InputDataType, OutputDataType>::Forward(const InputType&&, const InputType&&, const InputType&&)’:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:44:65: error: no matching function for call to ‘max(arma::enable_if2<true, const arma::eOp<arma::eGlue<arma::Mat<double>, arma::Mat<double>, arma::eglue_minus>, arma::eop_scalar_plus> >::result, int)’
       std::max(positive_distance - negative_distance + margin, 0);
                                                                 ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/string:40,
                 from /usr/include/c++/7/stdexcept:39,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/prereqs.hpp:33,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/core.hpp:67,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.cxx:4,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.hxx:4:
/usr/include/c++/7/bits/stl_algobase.h:219:5: note: candidate: template<class _Tp> const _Tp& std::max(const _Tp&, const _Tp&)
     max(const _Tp& __a, const _Tp& __b)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:219:5: note:   template argument deduction/substitution failed:
In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:106:0,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:44:65: note:   deduced conflicting types for parameter ‘const _Tp’ (‘arma::eOp<arma::eGlue<arma::Mat<double>, arma::Mat<double>, arma::eglue_minus>, arma::eop_scalar_plus>’ and ‘int’)
       std::max(positive_distance - negative_distance + margin, 0);
                                                                 ^
In file included from /usr/include/c++/7/bits/char_traits.h:39:0,
                 from /usr/include/c++/7/string:40,
                 from /usr/include/c++/7/stdexcept:39,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/prereqs.hpp:33,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/core.hpp:67,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.cxx:4,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.hxx:4:
/usr/include/c++/7/bits/stl_algobase.h:265:5: note: candidate: template<class _Tp, class _Compare> const _Tp& std::max(const _Tp&, const _Tp&, _Compare)
     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algobase.h:265:5: note:   template argument deduction/substitution failed:
In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:106:0,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:44:65: note:   deduced conflicting types for parameter ‘const _Tp’ (‘arma::eOp<arma::eGlue<arma::Mat<double>, arma::Mat<double>, arma::eglue_minus>, arma::eop_scalar_plus>’ and ‘int’)
       std::max(positive_distance - negative_distance + margin, 0);
                                                                 ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/boost/archive/detail/helper_collection.hpp:23,
                 from /usr/include/boost/archive/detail/basic_iarchive.hpp:28,
                 from /usr/include/boost/serialization/map.hpp:24,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/prereqs.hpp:79,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/core.hpp:67,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.cxx:4,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.hxx:4:
/usr/include/c++/7/bits/stl_algo.h:3462:5: note: candidate: template<class _Tp> _Tp std::max(std::initializer_list<_Tp>)
     max(initializer_list<_Tp> __l)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3462:5: note:   template argument deduction/substitution failed:
In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:106:0,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:44:65: note:   ‘arma::eOp<arma::eGlue<arma::Mat<double>, arma::Mat<double>, arma::eglue_minus>, arma::eop_scalar_plus>’ is not derived from ‘std::initializer_list<_Tp>’
       std::max(positive_distance - negative_distance + margin, 0);
                                                                 ^
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/boost/archive/detail/helper_collection.hpp:23,
                 from /usr/include/boost/archive/detail/basic_iarchive.hpp:28,
                 from /usr/include/boost/serialization/map.hpp:24,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/prereqs.hpp:79,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/core.hpp:67,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.cxx:4,
                 from /home/aman/openSource/mlpack/mlpack/build/src/mlpack/tests/cotire/mlpack_test_CXX_prefix.hxx:4:
/usr/include/c++/7/bits/stl_algo.h:3468:5: note: candidate: template<class _Tp, class _Compare> _Tp std::max(std::initializer_list<_Tp>, _Compare)
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^~~
/usr/include/c++/7/bits/stl_algo.h:3468:5: note:   template argument deduction/substitution failed:
In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:106:0,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:44:65: note:   ‘arma::eOp<arma::eGlue<arma::Mat<double>, arma::Mat<double>, arma::eglue_minus>, arma::eop_scalar_plus>’ is not derived from ‘std::initializer_list<_Tp>’
       std::max(positive_distance - negative_distance + margin, 0);
                                                                 ^
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp: At global scope:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:51:6: error: prototype for ‘void mlpack::ann::TripletLoss<InputDataType, OutputDataType>::Backward(const InputType&&, const InputType&&, const InputType&&, OutputType&&)’ does not match any in class ‘mlpack::ann::TripletLoss<InputDataType, OutputDataType>’
 void TripletLoss<InputDataType, OutputDataType>::Backward(
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:0:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:73:8: error: candidate is: template<class InputDataType, class OutputDataType> template<class InputType, class TargetType, class OutputType> void mlpack::ann::TripletLoss<InputDataType, OutputDataType>::Backward(const InputType&&, const InputType&&, const InputType&&, OutputType&&)
   void Backward(const InputType&& anchor,
        ^~~~~~~~
In file included from /home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss.hpp:106:0,
                 from /home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:24:
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp: In instantiation of ‘double mlpack::ann::TripletLoss<InputDataType, OutputDataType>::Forward(const InputType&&, const InputType&&, const InputType&&) [with InputType = arma::Mat<double>; InputDataType = arma::Mat<double>; OutputDataType = arma::Mat<double>]’:
/home/aman/openSource/mlpack/mlpack/src/mlpack/tests/loss_functions_test.cpp:414:92:   required from here
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:38:49: error: conversion from ‘arma::Mat<double>::elem_type {aka double}’ to non-scalar type ‘arma::mat {aka arma::Mat<double>}’ requested
       metric::SquaredEuclideanDistance::Evaluate(anchor, positive);
       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~
/home/aman/openSource/mlpack/mlpack/src/mlpack/methods/ann/loss_functions/triplet_loss_impl.hpp:41:50: error: conversion from ‘arma::Mat<double>::elem_type {aka double}’ to non-scalar type ‘arma::mat {aka arma::Mat<double>}’ requested
        metric::SquaredEuclideanDistance::Evaluate(anchor, negative);