smart-word ansi .6.1.2430
<CORE>
middle part of a BEGIN .. WHILE .. REPEAT
control-loop - if cond is true the code-piece up to REPEAT
is executed which will then jump back to BEGIN - and if
the cond is null then WHILE will branch to right after
the REPEAT
(compare with UNTIL that forms a BEGIN .. UNTIL loop)
reference: p4_while in ../src/core.c:1872, export CS WHILE