1 // SPDX-License-Identifier: Apache-2.0
2 //
3 // Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
4 // Copyright 2008-2016 National ICT Australia (NICTA)
5 //
6 // Licensed under the Apache License, Version 2.0 (the "License");
7 // you may not use this file except in compliance with the License.
8 // You may obtain a copy of the License at
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 // ------------------------------------------------------------------------
17
18
19 //! \addtogroup fn_det
20 //! @{
21
22
23
24 template<typename T1>
25 arma_warn_unused
26 inline
27 typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, typename T1::elem_type >::result
det(const Base<typename T1::elem_type,T1> & X)28 det(const Base<typename T1::elem_type,T1>& X)
29 {
30 arma_extra_debug_sigprint();
31
32 typedef typename T1::elem_type eT;
33
34 eT out_val = eT(0);
35
36 const bool status = op_det::apply_direct(out_val, X.get_ref());
37
38 if(status == false)
39 {
40 out_val = eT(0);
41 arma_stop_runtime_error("det(): failed to find determinant");
42 }
43
44 return out_val;
45 }
46
47
48
49 template<typename T1>
50 inline
51 typename enable_if2< is_supported_blas_type<typename T1::elem_type>::value, bool >::result
det(typename T1::elem_type & out_val,const Base<typename T1::elem_type,T1> & X)52 det(typename T1::elem_type& out_val, const Base<typename T1::elem_type,T1>& X)
53 {
54 arma_extra_debug_sigprint();
55
56 typedef typename T1::elem_type eT;
57
58 const bool status = op_det::apply_direct(out_val, X.get_ref());
59
60 if(status == false)
61 {
62 out_val = eT(0);
63 arma_debug_warn_level(3, "det(): failed to find determinant");
64 }
65
66 return status;
67 }
68
69
70
71 template<typename T>
72 arma_warn_unused
73 arma_inline
74 typename arma_scalar_only<T>::result
det(const T & x)75 det(const T& x)
76 {
77 return x;
78 }
79
80
81
82 //! @}
83