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3.5 Runstream Control

81789 NOP ( → )
Does nothing.
8172A 'R ( → ob )
Pushes next object in return stack (i.e., the first object in the composite above this one) to the stack (skipping it). If top return stack is empty (contains SEMI), a null secondary is pushed and the pointer is not advanced.
8172F 'REVAL ( → ? )
Does <REF>'R then <REF>EVAL.
843E9 'R'R ( → ob1 ob2 )
Does <REF>'R twice.
8148C ticR ( → ob T )
( → F )
Pushes next object in return stack to stack and TRUE, of just FALSE if the top return stack body is empty. In this case, it is dropped.
84407 'RRDROP ( → ob )
Does <REF>'R , then <REF>RDROP.
81734 >R ( :: → )
Pushes :: to top of return stack (skips prolog, i.e., the composite will be executed automatically).
8178E R> ( → :: )
Creates and pops a secondary from top return stack body to stack.
81793 R@ ( → :: )
Like <REF>R>, but the return stack is not popped.
81757 EVAL ( ob → )
Evaluates object.
81CBB COMPEVAL ( comp → )
EVAL just pushes a list back, this one executes it.
81B21 RDUP ( → )
Duplicates top return stack level.
81798 RDROP ( → )
Pops the return stack.
813CE 2RDROP ( → )
Pops two return stack levels.
81469 3RDROP ( → )
Pops three return stack levels.
83D68 DROPRDROP ( ob → )
Does DROP then <REF>RDROP .
81432 RDROPCOLA ( → )
Does <REF>RDROP then <REF>COLA .
81437 RSWAP ( → )
Swap in the return stack.
81B26 RROLL ( #n → )
Rolls nth return stack level to top of return stack.
84272 RSKIP ( → )
Skips first object in the return stack (i.e., the first object in the composite above this one).
0312B SEMI ( → )
DROP the rest of the current stream.


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This document was generated by Carsten Dominik on May, 30 2005 using texi2html