ostreamMethods.h
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24 #ifndef PXR_BASE_TF_OSTREAM_METHODS_H
25 #define PXR_BASE_TF_OSTREAM_METHODS_H
26 
40 
41 #include "pxr/pxr.h"
42 #include "pxr/base/tf/hashmap.h"
44 
45 #include <ostream>
46 #include <vector>
47 #include <list>
48 #include <map>
49 #include <set>
50 #include <type_traits>
51 
52 #include <boost/type_traits/has_left_shift.hpp>
53 
54 PXR_NAMESPACE_OPEN_SCOPE
55 
56 template <class T>
57 constexpr bool Tf_IsOstreamable() {
58  return boost::has_left_shift<
59  std::ostream &, /* << */ T, /* -> */ std::ostream &>::value;
60 }
61 
64 template <class T, uint32_t N>
65 typename std::enable_if<PXR_NS::Tf_IsOstreamable<T>(), std::ostream &>::type
66 operator<<(std::ostream &out, const TfSmallVector<T, N> &v)
67 {
68  out << "[ ";
69  for (auto const &obj: v)
70  out << obj << " ";
71  out << "]";
72 
73  return out;
74 }
75 
76 PXR_NAMESPACE_CLOSE_SCOPE
77 
78 // These operator<< overloads need to go in the std namespace for
79 // Koenig lookup to work.
80 namespace std {
81 
84 template <class T>
85 typename std::enable_if<PXR_NS::Tf_IsOstreamable<T>(), std::ostream &>::type
86 operator<<(std::ostream &out, const std::vector<T> &v)
87 {
88  out << "[ ";
89  for (auto const &obj: v)
90  out << obj << " ";
91  out << "]";
92 
93  return out;
94 }
95 
98 template <class T>
99 typename std::enable_if<PXR_NS::Tf_IsOstreamable<T>(), std::ostream &>::type
100 operator<<(std::ostream &out, const std::set<T> &v)
101 {
102  out << "( ";
103  for (auto const &obj: v)
104  out << obj << " ";
105  out << ")";
106 
107  return out;
108 }
109 
112 template <class T>
113 typename std::enable_if<PXR_NS::Tf_IsOstreamable<T>(), std::ostream &>::type
114 operator<<(std::ostream &out, const std::list<T> &l)
115 {
116  out << "{ ";
117  for (auto const &obj: l)
118  out << obj << " ";
119  out << "}";
120 
121  return out;
122 }
123 
126 template <class K, class M, class H, class C, class A>
127 typename std::enable_if<
128  PXR_NS::Tf_IsOstreamable<K>() && PXR_NS::Tf_IsOstreamable<M>(), std::ostream &>::type
129 operator<<(std::ostream &out, const PXR_NS::TfHashMap<K, M, H, C, A> &h)
130 {
131  out << "< ";
132  for (auto const &p: h)
133  out << "<" << p.first << ": " << p.second << "> ";
134  out << ">";
135  return out;
136 }
137 
140 template <class K, class M>
141 typename std::enable_if<
142  PXR_NS::Tf_IsOstreamable<K>() && PXR_NS::Tf_IsOstreamable<M>(), std::ostream &>::type
143 operator<<(std::ostream &out, const std::map<K, M> &h)
144 {
145  out << "< ";
146  for (auto const &p: h)
147  out << "<" << p.first << ": " << p.second << "> ";
148  out << ">";
149  return out;
150 }
151 
152 } // namespace std
153 
154 #endif // PXR_BASE_TF_OSTREAM_METHODS_H
This is a small-vector class with local storage optimization, the local storage can be specified via ...
Definition: smallVector.h:177
std::enable_if< 1::Tf_IsOstreamable< T >), std::ostream & >::type operator<<(std::ostream &out, const TfSmallVector< T, N > &v)
Output a TfSmallVector using [ ] as delimiters.