[gforth] / gforth / except.fs  

gforth: gforth/except.fs

Diff for /gforth/except.fs between version 1.17 and 1.18

version 1.17, Sun Feb 18 18:30:51 2007 UTC version 1.18, Mon Feb 19 00:08:20 2007 UTC
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     rp@ handler !      rp@ handler !
     >r ;      >r ;
   
 : try ( compilation  -- orig ; run-time  -- ) \ gforth  : try ( compilation  -- orig ; run-time  -- R:sys1 ) \ gforth
     \ !! does not work correctly for gforth-native      \G Start an exception-catching region.
     POSTPONE ahead here >r >mark 1 cs-roll POSTPONE then      POSTPONE ahead here >r >mark 1 cs-roll POSTPONE then
     r> POSTPONE literal POSTPONE (try) ; immediate compile-only      r> POSTPONE literal POSTPONE (try) ; immediate compile-only
   
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 ;  ;
   
 : iferror ( compilation  orig1 -- orig2 ; run-time  -- ) \ gforth  : iferror ( compilation  orig1 -- orig2 ; run-time  -- ) \ gforth
       \G Starts the exception handling code (executed if there is an
       \G exception between @code{try} and @code{endtry}).  This part has
       \G to be finished with @code{then}.
     \ !! check using a special tag      \ !! check using a special tag
     POSTPONE else handler-intro,      POSTPONE else handler-intro,
 ; immediate compile-only  ; immediate compile-only
   
 : restore ( compilation  orig1 -- ; run-time  -- ) \ gforth  : restore ( compilation  orig1 -- ; run-time  -- ) \ gforth
       \G Starts restoring code, that is executed if there is an
       \G exception, and if there is no exception.
     POSTPONE iferror POSTPONE then      POSTPONE iferror POSTPONE then
 ; immediate compile-only  ; immediate compile-only
   
 : endtry ( compilation  -- ; run-time  -- ) \ gforth  : endtry ( compilation  -- ; run-time  R:sys1 -- ) \ gforth
       \G End an exception-catching region.
     POSTPONE (endtry)      POSTPONE (endtry)
 ; immediate compile-only  ; immediate compile-only
   
   : endtry-iferror ( compilation  orig1 -- orig2 ; run-time  R:sys1 -- ) \ gforth
       \G End an exception-catching region while starting
       \G exception-handling code outside that region (executed if there
       \G is an exception between @code{try} and @code{endtry-iferror}).
       \G This part has to be finished with @code{then} (or
       \G @code{else}...@code{then}).
       POSTPONE (endtry) POSTPONE iferror POSTPONE (endtry)
   ; immediate compile-only
   
 :noname ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception  :noname ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception
     try      try
         execute 0          execute 0

Generate output suitable for use with a patch program
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Removed from v.1.17  
changed lines
  Added in v.1.18
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