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add type system note

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Csaba Hruska 2018-02-15 09:48:46 +01:00
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GRIN-Type-System.md
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@ -72,3 +72,15 @@ eval q =
update q w
pure w
```
# Notes
A builtin dependent type function should be enough for full GRIN expressivity.
```
prj :: Tag -> Int -> a
```
OR
```
prjNode :: {Node A, ..., Node Z} -> Tag -> Node Tag
prjItem :: Node Tag -> Int -> a
```