LangStudies/App/RegM/Lectures/Lecture.5.6.7.Notes.md
Ed94 17c3b8fe36 SRegEx works!!!!
Its not a full flegged transpiler but it works at least on RDP's lexer. I can expand on demand.
2022-07-17 07:32:57 -04:00

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## Concatenation
Regex : `/^AB$/`
Psuedo: `start AB end`
Machine:
```
->o --A--> o --epsilon--> o --B--> (o)
Submachine_A --epsilon--> Submachine_B
```
## Union
Regex : `/^A|B$/`
Psuedo: `start A | B end`
Machine:
```
epsilon--> o --A--> o --epsilon
/ \
->o ->(o)
\ /
epsilon--> o --B--> o --epsilon
```
## Kleene Closure
Regex : `/^A*$/`
Psuedo: `start A.repeat(0-) end`
Machine:
```
<------episilon-------
/ \
->o --epsilon--> o --A--> o --epsilon--> (o)
\ /
-------------epsilon---------------->
```