[trafficserver] branch master updated: add string_view hash operator

[dr...@apache.org]

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dragon pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/trafficserver.git


The following commit(s) were added to refs/heads/master by this push:
     new 0cfa80e  add string_view hash operator
0cfa80e is described below

commit 0cfa80e3f884a460d010dd64a4eaee588ed784b9
Author: Jason Kenny <jk...@oath.com>
AuthorDate: Thu Oct 19 14:20:40 2017 -0500

    add string_view hash operator
    
    
    
    
    clang-format
---
 lib/ts/string_view.h | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/lib/ts/string_view.h b/lib/ts/string_view.h
index b68e56d..89e3ff6 100644
--- a/lib/ts/string_view.h
+++ b/lib/ts/string_view.h
@@ -1212,6 +1212,19 @@ using string_view = basic_string_view<char>;
 
 } // namespace ts
 
+namespace std
+{
+template <class _Type, class _Traits> struct hash<ts::basic_string_view<_Type, _Traits>> {
+  using string_type = ts::basic_string_view<_Type, _Traits>;
+
+  size_t
+  operator()(string_type const &x) const
+  {
+    return hash<typename string_type::const_pointer>()(x.data());
+  }
+};
+}
+
 /// Literal suffix for string_view.
 /// @note This enables @c string_view literals from C++ string literals in @c constexpr contexts, which
 /// is not the case for the character pointer constructor.
@@ -1221,6 +1234,7 @@ constexpr ts::string_view operator"" _sv(const char *str, size_t len) noexcept
   return ts::string_view(str, len);
 }
 
+//////////////////////////////////////////////////////////////////////////////////////
 // TS local extensions, not dependent on our local implementation of std::string_view.
 
 /// Check for prefix.

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