From 28c82c861e38fe05a25e916563e0551ed8fce91e Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Thu, 18 Jun 2015 12:32:55 +0200
Subject: Move map-key from build2 to libbutl, rename multi-index

---
 build/map-key      | 59 ------------------------------------------------------
 build/string-table |  4 ++--
 build/target       |  6 +++---
 3 files changed, 5 insertions(+), 64 deletions(-)
 delete mode 100644 build/map-key

(limited to 'build')

diff --git a/build/map-key b/build/map-key
deleted file mode 100644
index 385d154..0000000
--- a/build/map-key
+++ /dev/null
@@ -1,59 +0,0 @@
-// file      : build/map-key -*- C++ -*-
-// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
-// license   : MIT; see accompanying LICENSE file
-
-#ifndef BUILD_MAP_KEY
-#define BUILD_MAP_KEY
-
-#include <utility>    // declval()
-#include <functional> // hash
-
-namespace build
-{
-  // Google the "Emulating Boost.MultiIndex with Standard Containers" blog
-  // post for deatils.
-  //
-
-  template <typename T>
-  struct map_key
-  {
-    mutable const T* p;
-
-    map_key (const T* v = 0): p (v) {}
-    bool operator< (const map_key& x) const {return *p < *x.p;}
-    bool operator== (const map_key& x) const {return *p == *x.p;}
-  };
-
-  template <typename I>
-  struct map_iterator_adapter: I
-  {
-    typedef const typename I::value_type::second_type value_type;
-    typedef value_type* pointer;
-    typedef value_type& reference;
-
-    map_iterator_adapter () {}
-    map_iterator_adapter (I i): I (i) {}
-
-    map_iterator_adapter&
-    operator= (I i) {static_cast<I&> (*this) = i; return *this;}
-
-    reference operator* () const {return I::operator* ().second;}
-    pointer operator-> () const {return &I::operator-> ()->second;}
-  };
-}
-
-namespace std
-{
-  template <typename T>
-  struct hash<build::map_key<T>>: hash<T>
-  {
-    size_t
-    operator() (build::map_key<T> x) const
-      noexcept (noexcept (declval<hash<T>> () (*x.p)))
-    {
-      return hash<T>::operator() (*x.p);
-    }
-  };
-}
-
-#endif // BUILD_MAP_KEY
diff --git a/build/string-table b/build/string-table
index a4fae36..0188c62 100644
--- a/build/string-table
+++ b/build/string-table
@@ -9,7 +9,7 @@
 #include <string>
 #include <unordered_map>
 
-#include <build/map-key>
+#include <butl/multi-index>
 
 namespace build
 {
@@ -71,7 +71,7 @@ namespace build
     empty () const {return vec_.empty ();}
 
   private:
-    using key_type = map_key<std::string>;
+    using key_type = butl::map_key<std::string>;
     using value_type = string_table_element<I, D>;
     using map_type = std::unordered_map<key_type, value_type>;
     using traits = string_table_traits<D>;
diff --git a/build/target b/build/target
index 06aa227..d12a8e5 100644
--- a/build/target
+++ b/build/target
@@ -16,10 +16,10 @@
 #include <utility>    // move()
 #include <iterator>
 
-#include <butl/utility> // compare_c_string
+#include <butl/utility>     // compare_c_string
+#include <butl/multi-index> // map_iterator_adapter
 
 #include <build/path>
-#include <build/map-key>       // map_iterator_adapter
 #include <build/timestamp>
 #include <build/name>
 #include <build/variable>
@@ -394,7 +394,7 @@ namespace build
   struct target_set
   {
     typedef std::map<target_key, std::unique_ptr<target>> map;
-    typedef map_iterator_adapter<map::const_iterator> iterator;
+    typedef butl::map_iterator_adapter<map::const_iterator> iterator;
 
     iterator
     find (const target_key& k, tracer& trace) const;
-- 
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