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-rw-r--r--cutl/container/key.hxx71
-rw-r--r--cutl/container/map-iterator.hxx69
-rw-r--r--cutl/container/multi-index.hxx15
3 files changed, 155 insertions, 0 deletions
diff --git a/cutl/container/key.hxx b/cutl/container/key.hxx
new file mode 100644
index 0000000..6afef96
--- /dev/null
+++ b/cutl/container/key.hxx
@@ -0,0 +1,71 @@
+// file : cutl/container/key.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license : MIT; see accompkeying LICENSE file
+
+#ifndef CUTL_CONTAINER_KEY_HXX
+#define CUTL_CONTAINER_KEY_HXX
+
+namespace cutl
+{
+ namespace container
+ {
+ // A modifiable map key wrapper that can be used to implement multi-
+ // index containers, as discussed in the following post:
+ //
+ // http://www.codesynthesis.com/~boris/blog/2012/09/11/emulating-boost-multi-index-with-std-containers/
+ //
+ template <class T1, class T2 = void, class T3 = void>
+ struct key;
+
+ template <class T1>
+ struct key<T1, void, void>
+ {
+ mutable const T1* p1;
+
+ key (): p1 (0) {}
+ key (const T1& r1): p1 (&r1) {}
+ void assign (const T1& r1) const {p1 = &r1;}
+
+ bool operator< (const key& x) const {return *p1 < *x.p1;}
+ };
+
+ template <class T1, class T2>
+ struct key<T1, T2, void>
+ {
+ mutable const T1* p1;
+ mutable const T2* p2;
+
+ key (): p1 (0), p2 (0) {}
+ key (const T1& r1, const T2& r2): p1 (&r1), p2 (&r2) {}
+ void assign (const T1& r1, const T2& r2) const {p1 = &r1; p2 = &r2;}
+
+ bool operator< (const key& x) const
+ {
+ return *p1 < *x.p1 || (!(*x.p1 < *p1) && *p2 < *x.p2);
+ }
+ };
+
+ template <class T1, class T2, class T3>
+ struct key
+ {
+ mutable const T1* p1;
+ mutable const T2* p2;
+ mutable const T3* p3;
+
+ key (): p1 (0), p2 (0), p3 (0) {}
+ key (const T1& r1, const T2& r2, const T3& r3)
+ : p1 (&r1), p2 (&r2) , p3 (&r3) {}
+ void assign (const T1& r1, const T2& r2, const T3& r3) const
+ {p1 = &r1; p2 = &r2; p3 = &r3;}
+
+ bool operator< (const key& x) const
+ {
+ return (*p1 < *x.p1 ||
+ (!(*x.p1 < *p1) && (*p2 < *x.p2 ||
+ (!(*x.p2 < *p2) && *p3 < *x.p3))));
+ }
+ };
+ }
+}
+
+#endif // CUTL_CONTAINER_KEY_HXX
diff --git a/cutl/container/map-iterator.hxx b/cutl/container/map-iterator.hxx
new file mode 100644
index 0000000..3e84a4f
--- /dev/null
+++ b/cutl/container/map-iterator.hxx
@@ -0,0 +1,69 @@
+// file : cutl/container/map-iterator.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license : MIT; see accompanying LICENSE file
+
+#ifndef CUTL_CONTAINER_MAP_ITERATOR_HXX
+#define CUTL_CONTAINER_MAP_ITERATOR_HXX
+
+namespace cutl
+{
+ namespace container
+ {
+ // Map iterator adapter that can be used to implement multi-index
+ // containers, as discussed in the following post:
+ //
+ // http://www.codesynthesis.com/~boris/blog/2012/09/11/emulating-boost-multi-index-with-std-containers/
+ //
+ template <typename M>
+ struct map_iterator: M::iterator
+ {
+ typedef typename M::iterator base_iterator;
+ typedef typename M::value_type::second_type value_type;
+ typedef value_type* pointer;
+ typedef value_type& reference;
+
+ map_iterator () {}
+ map_iterator (base_iterator i): base_iterator (i) {}
+
+ reference
+ operator* () const
+ {
+ return base_iterator::operator* ().second;
+ }
+
+ pointer
+ operator-> () const
+ {
+ return &base_iterator::operator-> ()->second;
+ }
+ };
+
+ template <typename M>
+ struct map_const_iterator: M::const_iterator
+ {
+ typedef typename M::iterator base_iterator;
+ typedef typename M::const_iterator base_const_iterator;
+ typedef const typename M::value_type::second_type value_type;
+ typedef value_type* pointer;
+ typedef value_type& reference;
+
+ map_const_iterator () {}
+ map_const_iterator (base_iterator i): base_const_iterator (i) {}
+ map_const_iterator (base_const_iterator i): base_const_iterator (i) {}
+
+ reference
+ operator* () const
+ {
+ return base_const_iterator::operator* ().second;
+ }
+
+ pointer
+ operator-> () const
+ {
+ return &base_const_iterator::operator-> ()->second;
+ }
+ };
+ }
+}
+
+#endif // CUTL_CONTAINER_MAP_ITERATOR_HXX
diff --git a/cutl/container/multi-index.hxx b/cutl/container/multi-index.hxx
new file mode 100644
index 0000000..d9a713b
--- /dev/null
+++ b/cutl/container/multi-index.hxx
@@ -0,0 +1,15 @@
+// file : cutl/container/multi-index.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license : MIT; see accompanying LICENSE file
+
+#ifndef CUTL_CONTAINER_MULTI_INDEX_HXX
+#define CUTL_CONTAINER_MULTI_INDEX_HXX
+
+// Multi-index containers support. See the following post for details:
+//
+// http://www.codesynthesis.com/~boris/blog/2012/09/11/emulating-boost-multi-index-with-std-containers/
+//
+#include <cutl/container/key.hxx>
+#include <cutl/container/map-iterator.hxx>
+
+#endif // CUTL_CONTAINER_MULTI_INDEX_HXX