Comments on Porting
             Command Language Interpreter (CLI)
                        by WIS JPMO
                         to DEC Ada
    
                                                             Tool 34  
                                                             August 2, 1985
     
COMPILATION
-----------
  A VMS command file was created from the ordered list of compilation
  units provided in CLISRC.DIS.
     
  We were able to recompile the Command Language Interpreter with only
  minor changes in two files.  Errors occured because the generic 
  instantiation of package INTEGER_IO was needed, but had been 
  commented out of the code.  This comment notation was removed.  
  Additionally, the parameter "C" in the procedure GETC had to be 
  changed to mode "in out" from mode "out", so that a necessary assignment 
  could be made to "C".
     


EXECUTION
---------
  We were able to link CLI_2 without any problems.  Although no
  Users Manual was provided, the code stated that the Command
  Language Interpreter (CLI) implements the tools found in
  chapters one and two of "Software Tools in Pascal" by Brian
  W. Kernighan and P. J. Plauger.  The following commands were
  able to be executed by the Command Language Interpreter:
     
  copy            detab            expand
  charcount       entab            translit
  linecount       overstrike       quit
  wordcount       compress
     
  Most of the commands read subsequent text from the terminal
  modifying it in one way or another.  The commands we tried
  worked and would exit as expected, but when the CLI tried to 
  read the next command the end-of-file condition would not be 
  cleared and the CLI would abort with an unhandled exception 
  "END_ERROR".
     


COMMENT
-------
  The CLI is not a generalized command language interpreter.  Rather
  it provides a framework upon which to build a more general CLI.