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plimore about pli

pli

 

  1  definition  found 
 
  From  The  Free  On-line  Dictionary  of  Computing  (13  Mar  01)  [foldoc]: 
 
  PL/I 
 
  Programming  Language  One 
 
  An  attempt  to  combine  the  best  features  of  {Fortran},  {COBOL} 
  and  {ALGOL  60}.  Developed  by  George  Radin  of  {IBM}  in  1964. 
  Originally  named  NPL  and  Fortran  VI  The  result  is  large  but 
  elegant.  PL/I  was  one  of  the  first  languages  to  have  a  formal 
  {semantic}  definition,  using  the  {Vienna  Definition  Language}. 
  {EPL},  a  dialect  of  PL/I,  was  used  to  write  almost  all  of  the 
  {Multics}  {operating  system}.  PL/I  is  still  widely  used 
  internally  at  {IBM}.  The  PL/I  standard  is  ANS  X3.53-1976. 
 
  PL/I  has  no  {reserved  word}s.  Types  are  fixed,  float, 
  complex,  character  strings  with  maximum  length,  bit  strings, 
  and  label  variables.  {Array}s  have  lower  bounds  and  may  be 
  dynamic.  It  also  has  summation,  multi-level  structures, 
  {structure  assignment},  untyped  pointers,  {side  effect}s  and 
  {aliasing}.  {Control  flow}  constructs  include  goto;  do-end 
  groups;  do-to-by-while-end  loops;  external  procedures; 
  internal  nested  procedures  and  blocks;  {generic  procedure}s 
  and  {exception  handling}.  Procedures  may  be  declared 
  {recursive}.  Many  implementations  support  {concurrency} 
  ('call  task'  and  'wait(event)'  are  equivalent  to  {fork}/join) 
  and  compile-time  statements. 
 
  {LPI}  is  a  PL/I  {interpreter}. 
 
  ["A  Structural  View  of  PL/I",  D.  Beech,  Computing  Surveys,  2,1 
  33-64  (1970)]. 
 
  (1994-10-25)




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