• GNAT Pro
• Ada Answers
• Developers
• Academia
• Company

• 
• 
• 

Recent Papers

• Coverage and Free Software
  
• Abstract Interface Types in GNAT: Conversions, Discriminants, and C++
  
• Multi-Language Programming: The Challenge and Promise of Class-Level Interfacing
  
• Exposing Uninitialized Variables: Strengthening and Extending Run-Time Checks in Ada
  
• The Implementation of Ada 2005 Interface Types in the GNAT Compiler
  

Browse by Technology

• Ada / Ada 2005
• ASIS
• AWS
• GNAT Compilation System
• GNATbench
• GPS
• GtkAda
• PolyORB
• XML/Ada

Dev Log Archives

• October 2008
• September 2008
• August 2008
• July 2008
• June 2008
• May 2008
• April 2008
• March 2008
• February 2008
• January 2008
• December 2007
• November 2007
• October 2007
• September 2007
• August 2007
• July 2007
• June 2007
• May 2007
• April 2007
• March 2007
• February 2007
• January 2007
• December 2006
• November 2006
• October 2006
• September 2006
• August 2006
• July 2006
• June 2006
• May 2006
• April 2006
• March 2006
• February 2006
• January 2006
• December 2005
• November 2005
• October 2005
• September 2005
• August 2005
• July 2005
• June 2005
• May 2005
• April 2005
• March 2005
• February 2005
• January 2005
• December 2004
• November 2004
• October 2004
• September 2004
• August 2004
• July 2004
• June 2004
• May 2004
• April 2004
• March 2004
• February 2004
• January 2004

[GNAT] New warning for biased representation

Thursday June 19, 2008

If a component size clause, size clause, or component clause forces the use of biased representation for an integer type (e.g. storing range 10..11 in one bit using 0/1 to represent 10/11, then a warning is given. This warning is on by default and is included in -gnatwa. It can be turned off by using -gnatw.B. Note that, as documented, biased representation is not allowed for enumeration types for which an enumeration representation clause is given.

Posted in Development Log, GNAT Compilation System