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InsightToolkit-1.4.0(有大量的优化算法程序)

header names
------------
There's a list of ISO headers in headers.iso; each ISO header <blah> becomes
<vcl_blah.h> and there should not be any other headers here. Exceptions are:

vcl_compiler.h
  Every other header file in this directory should include this file.
  That's a requirement and it's service which clients can rely on; thus
  if you include <vcl_iostream.h> you *don't* need to include 
  <vcl_compiler.h> even if you need the macros defined in there.

vcl_complex_fwd.h
  In ISO C++, the complex template class can be forward declared with
    namespace std { template <class T> class complex; }
  so there is no need for a forward declaration header. In VXL C++, the
  complex class might be called anything from std::complex<T> to plain
  old vcl_complex<T>, so we do need a forward declaration header.

vcl_rel_ops.h
  This is the (deprecated) vcl form of the ISO incantation
  #include <utility>
  using std::rel_ops::operator!=;
  using std::rel_ops::operator> ;
  using std::rel_ops::operator<=;
  using std::rel_ops::operator>=;

vcl_rtti.h
  Under construction. For rtti emulation with compilers that don't support
  rtti.

vcl_stlfwd.h
  Forward declare the most commonly used parts of the STL, if possible.

vcl_deprecated_header.h
  Including this causes a preprocessor or compiler warning to be emitted. So
  include <vcl_deprecated_header.h> in header files that are to be deprecated.


tests directory
---------------
It is important to have a test program for every vcl feature as early 
detection of problems can save hours of recompilation time if a vcl
header has to be modified.


template files
--------------
This is the official codification of template file naming, as was proposed by
Peter Vanroose.
~       is for pointer (*)
+       is for < in templates
-       is for > in templates
.       is for the commas between template arguments
+-      is for the :: in nested classes
The abbreviations uchar, ushort, uint, ulong stand for unsigned versions of 
integer types. Use 's' as a prefix for signed versions. Beware that 'char'
can be either signed or unsigned and may or may not be the same type as the
qualified form.