Entry Evaluation Property

After the entry key and value have been evaluated and stored in the "Values" stack, LW Python creates a new entry object with the stack values and assigns this to the "Return Value." More formally,

if the following are true:

  • expression state at time t = "call_function_begin"
  • Value Stack at time t = [ [ evaluated_value, [ evaluated_key, [ ] ] ], stack ]
  • the expression at time t = entry key: value

then Return Value at time (t + 1) = entry evaluated_key: evaluated_value

For example, if the following are true:

  • (expression state at time 11) = "call_function_begin"
  • (value stack at time 11) = [ [ "Spain", [ "ES", [ ] ] ], [ [ ], [ ] ] ]
  • (the expression at time 11) = (entry "ES":"Spain")
then (return value at time (11 + 1)) = (entry "ES":"Spain")

Try stepping through the simulator to see LW Python set the "Return Value" to the new entry.

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