Tpetra parallel linear algebra Version of the Day
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Tpetra_Assembly_Helpers.hpp
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39
40#ifndef TPETRA_ASSEMBLY_HELPERS_HPP
41#define TPETRA_ASSEMBLY_HELPERS_HPP
42
43namespace Tpetra {
44
45namespace Impl {
46// Helper function to to apply an operation to each member of a
47// c++11 parameter pack since parameter expansion only happens
48// within functions, constructors, and initializer_lists
49template <typename... Args>
50inline void foreach_pack(Args &&... args) {}
51} // namespace Impl
52
53
54template <typename... Args>
55void beginAssembly(Args &&... args)
56{
57 // use the comma operator to transform a potentially void function call
58 // into a argument to allow proper parameter expansion for c++11
59 Impl::foreach_pack( (args.beginAssembly(),1)... );
60
61 // using c++17 the code would be
62 // (args.beginAssembly()...);
63}
64
65template <typename... Args>
66void endAssembly(Args &&... args)
67{
68 // use the comma operator to transform a potentially void function call
69 // into a argument to allow proper parameter expansion for c++11
70 Impl::foreach_pack( (args.endAssembly(),1)... );
71
72 // using c++17 the code would be
73 // (args.endAssembly()...);
74
75}
76
77template <typename... Args>
78void beginModify(Args &&... args)
79{
80 // use the comma operator to transform a potentially void function call
81 // into a argument to allow proper parameter expansion for c++11
82 Impl::foreach_pack( (args.beginModify(),1)... );
83
84 // using c++17 the code would be
85 // (args.beginModify()...);
86}
87
88template <typename... Args>
89void endModify(Args &&... args)
90{
91 // use the comma operator to transform a potentially void function call
92 // into a argument to allow proper parameter expansion for c++11
93 Impl::foreach_pack( (args.endModify(),1)... );
94
95 // using c++17 the code would be
96 // (args.endModify()...);
97
98}
99
100}// namespace Tpetra
101
102#endif // TPETRA_ASSEMBLY_HELPERS_HPP
Struct that holds views of the contents of a CrsMatrix.
Namespace Tpetra contains the class and methods constituting the Tpetra library.