| // Copyright 2003 Google, Inc. |
| // All Rights Reserved. |
| // |
| // Stream output operators for STL containers; to be used for logging *only*. |
| // Inclusion of this file lets you do: |
| // |
| // list<string> x; |
| // LOG(INFO) << "data: " << x; |
| // vector<int> v1, v2; |
| // CHECK_EQ(v1, v2); |
| // |
| // Note that if you want to use these operators from the non-global namespace, |
| // you may get an error since they are not in namespace std (and they are not |
| // in namespace std since that would result in undefined behavior). You may |
| // need to write |
| // |
| // using ::operator<<; |
| // |
| // to fix these errors. |
| |
| #ifndef UTIL_GTL_STL_LOGGING_INL_H_ |
| #define UTIL_GTL_STL_LOGGING_INL_H_ |
| |
| #if !@ac_cv_cxx_using_operator@ |
| # error We do not support stl_logging for this compiler |
| #endif |
| |
| #include <deque> |
| #include <list> |
| #include <map> |
| #include <ostream> |
| #include <set> |
| #include <utility> |
| #include <vector> |
| |
| #ifdef __GNUC__ |
| # include <ext/hash_set> |
| # include <ext/hash_map> |
| # include <ext/slist> |
| #endif |
| |
| template<class First, class Second> |
| inline std::ostream& operator<<(std::ostream& out, |
| const std::pair<First, Second>& p) { |
| out << '(' << p.first << ", " << p.second << ')'; |
| return out; |
| } |
| |
| @ac_google_start_namespace@ |
| |
| template<class Iter> |
| inline void PrintSequence(std::ostream& out, Iter begin, Iter end) { |
| using ::operator<<; |
| // Output at most 100 elements -- appropriate if used for logging. |
| for (int i = 0; begin != end && i < 100; ++i, ++begin) { |
| if (i > 0) out << ' '; |
| out << *begin; |
| } |
| if (begin != end) { |
| out << " ..."; |
| } |
| } |
| |
| @ac_google_end_namespace@ |
| |
| #define OUTPUT_TWO_ARG_CONTAINER(Sequence) \ |
| template<class T1, class T2> \ |
| inline std::ostream& operator<<(std::ostream& out, \ |
| const Sequence<T1, T2>& seq) { \ |
| @ac_google_namespace@::PrintSequence(out, seq.begin(), seq.end()); \ |
| return out; \ |
| } |
| |
| OUTPUT_TWO_ARG_CONTAINER(std::vector) |
| OUTPUT_TWO_ARG_CONTAINER(std::deque) |
| OUTPUT_TWO_ARG_CONTAINER(std::list) |
| #ifdef __GNUC__ |
| OUTPUT_TWO_ARG_CONTAINER(__gnu_cxx::slist) |
| #endif |
| |
| #undef OUTPUT_TWO_ARG_CONTAINER |
| |
| #define OUTPUT_THREE_ARG_CONTAINER(Sequence) \ |
| template<class T1, class T2, class T3> \ |
| inline std::ostream& operator<<(std::ostream& out, \ |
| const Sequence<T1, T2, T3>& seq) { \ |
| @ac_google_namespace@::PrintSequence(out, seq.begin(), seq.end()); \ |
| return out; \ |
| } |
| |
| OUTPUT_THREE_ARG_CONTAINER(std::set) |
| OUTPUT_THREE_ARG_CONTAINER(std::multiset) |
| |
| #undef OUTPUT_THREE_ARG_CONTAINER |
| |
| #define OUTPUT_FOUR_ARG_CONTAINER(Sequence) \ |
| template<class T1, class T2, class T3, class T4> \ |
| inline std::ostream& operator<<(std::ostream& out, \ |
| const Sequence<T1, T2, T3, T4>& seq) { \ |
| @ac_google_namespace@::PrintSequence(out, seq.begin(), seq.end()); \ |
| return out; \ |
| } |
| |
| OUTPUT_FOUR_ARG_CONTAINER(std::map) |
| OUTPUT_FOUR_ARG_CONTAINER(std::multimap) |
| #ifdef __GNUC__ |
| OUTPUT_FOUR_ARG_CONTAINER(__gnu_cxx::hash_set) |
| OUTPUT_FOUR_ARG_CONTAINER(__gnu_cxx::hash_multiset) |
| #endif |
| |
| #undef OUTPUT_FOUR_ARG_CONTAINER |
| |
| #define OUTPUT_FIVE_ARG_CONTAINER(Sequence) \ |
| template<class T1, class T2, class T3, class T4, class T5> \ |
| inline std::ostream& operator<<(std::ostream& out, \ |
| const Sequence<T1, T2, T3, T4, T5>& seq) { \ |
| @ac_google_namespace@::PrintSequence(out, seq.begin(), seq.end()); \ |
| return out; \ |
| } |
| |
| #ifdef __GNUC__ |
| OUTPUT_FIVE_ARG_CONTAINER(__gnu_cxx::hash_map) |
| OUTPUT_FIVE_ARG_CONTAINER(__gnu_cxx::hash_multimap) |
| #endif |
| |
| #undef OUTPUT_FIVE_ARG_CONTAINER |
| |
| #endif // UTIL_GTL_STL_LOGGING_INL_H_ |