[Boost-commit] svn:boost r82051 - sandbox/variadic_templates/sandbox/array_dyn

Subject: [Boost-commit] svn:boost r82051 - sandbox/variadic_templates/sandbox/array_dyn
From: cppljevans_at_[hidden]
Date: 2012-12-17 12:18:19

Author: cppljevans
Date: 2012-12-17 12:18:18 EST (Mon, 17 Dec 2012)
New Revision: 82051
URL: http://svn.boost.org/trac/boost/changeset/82051

Log:
Demo or reshape starting from 0 axis0 size.
This demo in response to:

From: gast128 <gast128_at_[hidden]>
Newsgroups: gmane.comp.lib.boost.user
Subject: [Boost.MultiArray]: size question
Date: Mon, 17 Dec 2012 15:50:49 +0000 (UTC)
Lines: 15

Text files modified: 
   sandbox/variadic_templates/sandbox/array_dyn/array_dyn.cpp |   117 ++++++++++++++++++++++++++++----------- 
   1 files changed, 84 insertions(+), 33 deletions(-)

Modified: sandbox/variadic_templates/sandbox/array_dyn/array_dyn.cpp
==============================================================================
--- sandbox/variadic_templates/sandbox/array_dyn/array_dyn.cpp	(original)
+++ sandbox/variadic_templates/sandbox/array_dyn/array_dyn.cpp	2012-12-17 12:18:18 EST (Mon, 17 Dec 2012)
@@ -3,13 +3,84 @@
 //
 #include "array_dyn.hpp"
 
+  template
+  < typename T
+  >
+  std::ostream&
+operator<<
+  ( std::ostream&sout
+  , std::vector<T>const&vec
+  )
+  {
+      sout<<"{ ";
+      for(unsigned i=0; i<vec.size(); ++i)
+      {
+          if(0<i) sout<<", ";
+          sout<<vec[i];
+      }
+      sout<<"}";
+      return sout;
+  }  
+
 int main(void)
 {
-    for(unsigned dir_op=dir_fwd; dir_op<unsigned(dir_rev+1); ++dir_op)
     {
-        std::cout<<"*************************\n";
+    #if 0
+        std::cout<<"*********general demo****************\n";
+        for(unsigned dir_op=dir_fwd; dir_op<unsigned(dir_rev+1); ++dir_op)
+        {
+            std::cout<<"*************************\n";
+            std::cout<<"dir_op="<<dir_op<<"\n";
+            array_dyn<int> ai(dirs(dir_op),{2,3,4});
+            unsigned const size=ai.my_data.size();
+            std::cout<<"my_data.size()="<<size<<"\n";
+            unsigned const value0=1000;
+            for( unsigned i=0; i<size; ++i)
+            {
+                ai.my_data[i]=value0+i;
+            }
+            unsigned const rank=ai.rank();
+            std::cout<<"rank="<<rank<<"\n";
+            std::cout<<"size()="<<ai.size()<<"\n";
+            for(unsigned i=0;i<rank;++i)
+            {
+                std::cout<<"stride("<<i<<")="<<ai.stride(i)<<"\n";
+                std::cout<<"  size("<<i<<")="<<ai.size(i)<<"\n";
+            }
+            std::cout<<"ai.offset_at_indices(1,0,0)="<<ai.offset_at_indices({1,0,0})<<"\n";
+            std::cout<<"ai(1,0,0)="<<ai({1,0,0})<<"\n";
+            std::cout<<"ai.offset_at_indices(0,1,0)="<<ai.offset_at_indices({0,1,0})<<"\n";
+            std::cout<<"ai(0,1,0)="<<ai({0,1,0})<<"\n";
+            std::cout<<"ai.offset_at_indices(0,0,1)="<<ai.offset_at_indices({0,0,1})<<"\n";
+            std::cout<<"ai(0,0,1)="<<ai({0,0,1})<<"\n";
+            std::cout<<"ai.ok_indices(1,2,3)="<<ai.ok_indices({1,2,3})<<"\n";
+            typedef std::vector<unsigned> indices_t;
+            std::cout<<"ai.ok_indices(indices_t({0,0,0}))="<<ai.ok_indices(indices_t({0,0,0}))<<"\n";
+            std::cout<<"ai.ok_indices(1,2,4)="<<ai.ok_indices({1,2,4})<<"\n";
+            std::cout<<"ai.ok_indices(1,2,3,0)="<<ai.ok_indices({1,2,3,0})<<"\n";
+            unsigned offset=ai.offset_at_indices({1,2,3});
+            std::cout<<"ai.offset_at_indices(1,2,3)="<<offset<<"\n";
+            std::vector<unsigned> indices(ai.indices_at_offset(offset));
+            std::cout<<"indices_at_offset("<<offset<<")=\n";
+            for(unsigned i=0; i< indices.size(); ++i)
+            {
+                std::cout<<indices[i]<<" ";
+            }
+            std::cout<<"\n";
+          #if 1
+            std::cout<<"ai=\n";
+            std::cout<<ai<<".\n";
+          #endif
+        }
+    #endif
+    }
+    {
+        unsigned dir_op=dir_fwd;
+        std::cout<<"********reshape demo***********\n";
         std::cout<<"dir_op="<<dir_op<<"\n";
-        array_dyn<int> ai(dirs(dir_op),{2,3,4});
+        std::vector<unsigned> shape({0,3});
+        std::cout<<"shape="<<shape<<"\n";
+        array_dyn<int> ai(dirs(dir_op),shape);
         unsigned const size=ai.my_data.size();
         std::cout<<"my_data.size()="<<size<<"\n";
         unsigned const value0=1000;
@@ -17,38 +88,18 @@
         {
             ai.my_data[i]=value0+i;
         }
-        unsigned const rank=ai.rank();
-        std::cout<<"rank="<<rank<<"\n";
-        std::cout<<"size()="<<ai.size()<<"\n";
-        for(unsigned i=0;i<rank;++i)
-        {
-            std::cout<<"stride("<<i<<")="<<ai.stride(i)<<"\n";
-            std::cout<<"  size("<<i<<")="<<ai.size(i)<<"\n";
-        }
-        std::cout<<"ai.offset_at_indices(1,0,0)="<<ai.offset_at_indices({1,0,0})<<"\n";
-        std::cout<<"ai(1,0,0)="<<ai({1,0,0})<<"\n";
-        std::cout<<"ai.offset_at_indices(0,1,0)="<<ai.offset_at_indices({0,1,0})<<"\n";
-        std::cout<<"ai(0,1,0)="<<ai({0,1,0})<<"\n";
-        std::cout<<"ai.offset_at_indices(0,0,1)="<<ai.offset_at_indices({0,0,1})<<"\n";
-        std::cout<<"ai(0,0,1)="<<ai({0,0,1})<<"\n";
-        std::cout<<"ai.ok_indices(1,2,3)="<<ai.ok_indices({1,2,3})<<"\n";
-        typedef std::vector<unsigned> indices_t;
-        std::cout<<"ai.ok_indices(indices_t({0,0,0}))="<<ai.ok_indices(indices_t({0,0,0}))<<"\n";
-        std::cout<<"ai.ok_indices(1,2,4)="<<ai.ok_indices({1,2,4})<<"\n";
-        std::cout<<"ai.ok_indices(1,2,3,0)="<<ai.ok_indices({1,2,3,0})<<"\n";
-        unsigned offset=ai.offset_at_indices({1,2,3});
-        std::cout<<"ai.offset_at_indices(1,2,3)="<<offset<<"\n";
-        std::vector<unsigned> indices(ai.indices_at_offset(offset));
-        std::cout<<"indices_at_offset("<<offset<<")=\n";
-        for(unsigned i=0; i< indices.size(); ++i)
-        {
-            std::cout<<indices[i]<<" ";
-        }
-        std::cout<<"\n";
-      #if 1
         std::cout<<"ai=\n";
         std::cout<<ai<<".\n";
-      #endif
+        shape[0]=1;
+        std::cout<<"shape="<<shape<<"\n";
+        ai.reshape(shape);
+        std::cout<<"ai=\n";
+        std::cout<<ai<<".\n";
+        shape[0]=5;
+        std::cout<<"shape="<<shape<<"\n";
+        ai.reshape(shape);
+        std::cout<<"ai=\n";
+        std::cout<<ai<<".\n";
     }
     return 0;
 }