6.2.1950
OF
 
CORE EXT
Interpretation:
Interpretation semantics for this word are undefined.

Compilation:
( C: -- of-sys )

Put of-sys onto the control flow stack. Append the run-time semantics given below to the current definition. The semantics are incomplete until resolved by a consumer of of-sys such as ENDOF.

Run-time:
( x1 x2 -- | x1 )

If the two values on the stack are not equal, discard the top value and continue execution at the location specified by the consumer of of-sys, e.g., following the next ENDOF. Otherwise, discard both values and continue execution in line.

See:
6.2.0873 CASE, 6.2.1342 ENDCASE, 6.2.1343 ENDOF, A.6.2.1950 OF.

Rationale:
Typical use:
: X ...
   CASE
   test1 OF ... ENDOF
   testn OF ... ENDOF
   ... ( default )
   ENDCASE ...
;
Testing:
See F.6.2.0873 CASE.