Proof: Get Iterate Parent 2
Let's prove the following theorem:
if the following are true:
- expression state at time 2 = "iterate_args"
- arguments stack at time 2 = [ [ entry "ES": "Estonia", [ entry "MX": "Mexico", [ ] ] ], [ ] ]
- parent stack at time 2 = [
{"ES": "Estonia", "MX": "Mexico"}
, [ ] ]
then parent stack at time 3 = [ {"ES": "Estonia", "MX": "Mexico"}
, [ ] ]
Proof:
Given
1 | expression state at time 2 = "iterate_args" |
---|---|
2 | arguments stack at time 2 = [ [ entry "ES": "Estonia", [ entry "MX": "Mexico", [ ] ] ], [ ] ] |
3 | parent stack at time 2 = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ] |
# | Claim | Reason |
---|---|---|
1 | parent stack at time (2 + 1) = parent stack at time 2 | if expression state at time 2 = "iterate_args" and arguments stack at time 2 = [ [ entry "ES": "Estonia", [ entry "MX": "Mexico", [ ] ] ], [ ] ], then parent stack at time (2 + 1) = parent stack at time 2 |
2 | parent stack at time (2 + 1) = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ] |
if parent stack at time (2 + 1) = parent stack at time 2 and parent stack at time 2 = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ], then parent stack at time (2 + 1) = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ] |
3 | 2 + 1 = 3 | 2 + 1 = 3 |
4 | parent stack at time (2 + 1) = parent stack at time 3 | if 2 + 1 = 3, then parent stack at time (2 + 1) = parent stack at time 3 |
5 | parent stack at time 3 = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ] |
if parent stack at time (2 + 1) = parent stack at time 3 and parent stack at time (2 + 1) = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ], then parent stack at time 3 = [ {"ES": "Estonia", "MX": "Mexico"} , [ ] ] |
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