Changes between Version 6 and Version 7 of soc2009

Timestamp:

Mar 18, 2009, 10:18:45 PM (14 years ago)

Author:

viboes

Comment:

Adding dependent variables

soc2009

@@ +1 @@
+[[PageOutline]]
 = Google Summer of Code 2009 =
+
+Google will allocate funded student positions as outlined here:
+
+[http://socghop.appspot.com/document/show/program/google/gsoc2009/studentallocations]
+
+Meaning that it is in our interest to get as many student applications 
+as possible.  We don't know how many will be approved by google.
+
+Please post your project ideas here, where interested students will be 
+most likely to stumble on them.
 
 == Boost.Serialization ==
@@ -30 +41 @@
 === Maximum version check (straszheim) ===
 
-See https://svn.boost.org/trac/boost/ticket/2830
+See [https://svn.boost.org/trac/boost/ticket/2830]
 
 === Export name aliasing (straszheim) ===
@@ -56 +67 @@
 [http://groups.google.com/group/boost-list/browse_frm/thread/df6ecfb0089b28fd] 
 
-== Serialization/Frames  ==
+== Serialization/Frames (viboes) ==
 
 Library based on an extension of the Archive concept making it bidirectional. 
@@ -175 +186 @@
 
 == Boost.Accumulators ==
-== Dependents accumulators ==
+=== Dependents accumulators (viboes) ===
 
 The accumulator library allows to determine dependency between accumulator, but not between accumulator_sets.
@@ -234 +245 @@
 }}}
 
-
+== Dependent variables (viboes) ==
+Manage with the underlying concepts of a Spreadsheet but without displaying them. 
+ 
+Defines '''cells''' that can be organized in a classical grid consisting of rows and columns, or any other structure as for example a tree. 
+Each cell could contains alphanumeric text or numeric values but can also contain any other value. 
+A spreadsheet cell may alternatively contain a '''formula''' that defines how the contents of that cell is to be calculated from the contents of any other cell (or combination of cells) each time any cell is updated.
+
+It seems natural to use Boost.Proto to define the DSL for the cell formulas.
+
+{{{
+#!cpp
+space sh;
+space::cell<int> c1(sh), c2(sh), c3(sh);
+c1.expr=1;
+c2.expr=2;
+c3.expr=c1+c2;
+sh.refresh();
+std::cout<< c1.value() << ", " << c2.value() << ", " << c3.value() << std::endl;
+}}}
+
+{{{
+#!cpp
+sheet sh(2,3);
+sheet::cell<int> c01(sh,0,1), c02(sh,0,2), c03(sh,0,3);
+c01.expr=1;
+c02.expr=2;
+c03.expr=rel_cell(c03,0,1)+rel_cell(c03,0,2);
+sh.refresh();
+std::cout<< c01.value() << ", " << c02.value() << ", " << c03.value() << std::endl;
+c11.expr=5;
+c12.expr=8;
+c13.expr=c03.copy(); 
+sh.refresh();
+std::cout<< c11 << ", " << c12 << ", " << c13 << std::endl;
+}}}
+
+