[Serusers] COMer - Programming Language for Component Development - sr-users

10 May 2003


      COMer - Programming Language for Component Development
If you are a Windows Programmer, I would like to introduce something
interesting to you.
COMer is a native programming language for COM component development.
A COM component can be easily made in COMer as follow: [File:MyCom.cm]
#ifndef _MYCOM_CM
#define _MYCOM_CM
/*
 * A COM Class
 */
[ clsid = "{EF6CD47E-B844-4219-B582-6F9FE16D45F6}",
  progid = "Dexterity.MyCom1.1",
  helpstring = "Dexterity Com1 Class",
  export, unhandle ]
com CMyCom1
{
  /*
   * An Interface implemented in this class
   */
  [iid="{A123799B-1D8B-4efb-8D43-42AE582767C1}"]
  interface IMyInterface
  {
    method SetValue(int dVal)
    {
      m_dValue = dVal;
      done;
    }
method GetDoubleValue(int &dVal)
    {
      dVal = m_dValue << 1;
      done;
    }  
  }
/*
   * Instance variables
   */
  instvars
  {
    int m_dValue;
  }
}
#endif
The design of COMer is native to the concept of the Component Object Model
(COM) mechanism. COM classes are defined as in the way that COM specifies.
Interfaces are specified or defined within a COM class and the methods of
the interfaces are defined within the interfaces. It is simple.
A special characteristic of COMer is that the COMer compiler generates C++
source code files as its final outputs. Therefore, you can use C++ code
within the COMer classes, like Lex, Yacc or MIDL. To build the component,
what you need to do is to specify one more file only to indicate the module
of the component to build.
E.g: [File:MyCom.cmdef]
module: inprocsvr
source { MyCom.cm }
Then, by the following command line (cmc is the COMer compiler program):
...
cmc MyCom.cmdef
COMer compiler will generate the following C++ files:
Main.cpp
MyCom.h
MyCom.cpp
MyCom.def
Makefile
Finally, you only need to build these C++ files by using the generated
makefile by C++ build tools. The component 'MyCom.dll' will then be made.
It's so simple!
Lets try it! You will like it!
Home Page: 
http://www.dexterity.com.hk/COMer/
Download Trial Version: 
http://www.dexterity.com.hk/COMer/Download/Download.asp
Dexterity Technologies Limited
http://www.dexterity.com.hk/
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