--- layout: default title: "Continuing" parent: Abnormal ancestor: Funcons-beta --- [Funcons-beta] : [Continuing.cbs] ----------------------------- ### Continuing 
[
  Datatype continuing
  Funcon   continued
  Funcon   finalise-continuing
  Funcon   continue
  Funcon   handle-continue
]
Meta-variables
  T <: values
Datatype
  continuing ::= continued
continued is a reason for abrupt termination. 
Funcon
  finalise-continuing(X:=>T) : =>T|null-type
   ~> finalise-abrupting(X)
finalise-continuing(X) handles abrupt termination of X due to executing continue. 
Funcon
  continue : =>empty-type
   ~> abrupt(continued)
continue abruptly terminates all enclosing computations until it is handled. 
Funcon
  handle-continue(_:=>null-type) : =>null-type
handle-continue(X) terminates normally when X terminates abruptly for the reason continued. 
Rule
                   X --abrupted( )-> X′
  ------------------------------------------------------
  handle-continue(X) --abrupted( )-> handle-continue(X′)
Rule
                   X --abrupted(continued)-> _
  --------------------------------------------
  handle-continue(X) --abrupted( )-> null-value
Rule
                   X --abrupted(V:~continuing)-> X′
  ------------------------------------------------------
  handle-continue(X) --abrupted(V)-> handle-continue(X′)
Rule
  handle-continue(null-value) ~> null-value
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