GetFEM  5.4.2
bgeot_comma_init.h
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4  Copyright (C) 2003-2020 Julien Pommier
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30 ===========================================================================*/
31 
32 /**@file bgeot_comma_init.h
33  @author Julien Pommier <Julien.Pommier@insa-toulouse.fr>
34  @date March 27, 2003.
35  @brief convenient initialization of vectors via overload of "operator,".
36  @code
37  std::vector<double> foo; bgeot::sc(foo) += 1,3,4;
38  @endcode
39 
40  highly inspired by the boost init.hpp (C) Thorsten Ottosen
41  (http://www.cs.auc.dk/~nesotto/init/)
42 */
43 #ifndef COMMA_INIT
44 #define COMMA_INIT
45 
46 namespace bgeot {
47 
48  /**
49  * Template class which forwards insertions to the
50  * container class.
51  */
52  template<typename Container> class Comma_initializer {
53  typedef typename Container::value_type value_type;
54  Container& c_;
55  public:
56  explicit Comma_initializer( Container& c ) : c_( c ) {}
57 
58  Comma_initializer& operator,(const value_type& v) {
59  c_.push_back(v);
60  return *this;
61  }
62 
63  /**
64  * Should only be used with first value. The operator
65  * gives a nice syntax for initializing the container.
66  */
67  Comma_initializer& operator=(const value_type v) {
68  c_.clear();
69  c_.push_back(v);
70  return *this;
71  }
72  /**
73  * Should only be used with first value. The operator
74  * gives a nice syntax for appending to the container.
75  */
76  Comma_initializer& operator+=(value_type v) {
77  c_.push_back(v);
78  return *this;
79  }
80  };
81 
82  template<typename T> Comma_initializer<T> sc( T& c )
83  { return Comma_initializer<T>(c); }
84 
85 }
86 
87 #endif
bgeot::Comma_initializer::operator+=
Comma_initializer & operator+=(value_type v)
Should only be used with first value.
Definition: bgeot_comma_init.h:76
bgeot::Comma_initializer
Template class which forwards insertions to the container class.
Definition: bgeot_comma_init.h:52
bgeot
Basic Geometric Tools.
Definition: bgeot_convex_ref.cc:27
bgeot::Comma_initializer::operator=
Comma_initializer & operator=(const value_type v)
Should only be used with first value.
Definition: bgeot_comma_init.h:67