Proof: Get Iterate Parent 13
Let's prove the following theorem:
if the following are true:
- expression state at time 13 = "iterate_args"
- arguments stack at time 13 = [ [ "Smith", [ 25, [ ] ] ], [ ] ]
- parent stack at time 13 = [
Person("John", "Smith", 25)
, [ ] ]
then parent stack at time 14 = [ Person("John", "Smith", 25)
, [ ] ]
Proof:
Given
1 | expression state at time 13 = "iterate_args" |
---|---|
2 | arguments stack at time 13 = [ [ "Smith", [ 25, [ ] ] ], [ ] ] |
3 | parent stack at time 13 = [ Person("John", "Smith", 25) , [ ] ] |
# | Claim | Reason |
---|---|---|
1 | parent stack at time (13 + 1) = parent stack at time 13 | if expression state at time 13 = "iterate_args" and arguments stack at time 13 = [ [ "Smith", [ 25, [ ] ] ], [ ] ], then parent stack at time (13 + 1) = parent stack at time 13 |
2 | parent stack at time (13 + 1) = [ Person("John", "Smith", 25) , [ ] ] |
if parent stack at time (13 + 1) = parent stack at time 13 and parent stack at time 13 = [ Person("John", "Smith", 25) , [ ] ], then parent stack at time (13 + 1) = [ Person("John", "Smith", 25) , [ ] ] |
3 | 13 + 1 = 14 | 13 + 1 = 14 |
4 | parent stack at time (13 + 1) = parent stack at time 14 | if 13 + 1 = 14, then parent stack at time (13 + 1) = parent stack at time 14 |
5 | parent stack at time 14 = [ Person("John", "Smith", 25) , [ ] ] |
if parent stack at time (13 + 1) = parent stack at time 14 and parent stack at time (13 + 1) = [ Person("John", "Smith", 25) , [ ] ], then parent stack at time 14 = [ Person("John", "Smith", 25) , [ ] ] |
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