Internal variables for rules#1353

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Commits on Aug 19, 2020

read variable definitions
tomaskender
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Commits on Sep 1, 2020

save variable to hashmap, pop value from stack
tomaskender
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Commits on Sep 14, 2020

clean up code
tomaskender
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Commits on Sep 15, 2020

fix preference of external variable over internal
tomaskender
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Commits on Sep 19, 2020

Commits on Sep 20, 2020

Commits on Oct 4, 2020

make variables to support structs
tomaskender
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