Command: rollu

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Name:
rollu - Roll the three top stack elements upwards
Synopsis:
obj1 obj2 obj3 rollu -> obj3 obj1 obj2  
Description:
rollu is equivalent to 3 1 roll  
Diagnostics:
Raises StackUnderflow error if there are less  
than 3 objects on the stack.
SeeAlso: Source:
/opt/conda/conda-bld/nest_1512418773968/work/nest-2.14.0/sli/slistack.cc
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