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Update showExtractors to Printer.TreeStructure #10849

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Dec 21, 2020
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Update showExtractors to Printer.TreeStructure #10849

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902bd21
Update `showExtractors` to `Printer.TreeStructure`
nicolasstucki Dec 18, 2020
b2d5163
Update docs/docs/reference/metaprogramming/tasty-reflect.md
nicolasstucki Dec 18, 2020
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10 changes: 8 additions & 2 deletions docs/docs/reference/metaprogramming/tasty-reflect.md
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Expand Up @@ -58,8 +58,14 @@ def natConstImpl(x: Expr[Int])(using Quotes): Expr[Int] = {
}
```

To easily know which extractors are needed, the `showExtractors` method on a
`quotes.reflect.Term` returns the string representation of the extractors.
To easily know which extractors are needed using the `Printer.TreeStructure.show` which returns the string representation the structure of the tree. Other printers can also be found in the `Printer` module.

```scala
xTree.show(using Printer.TreeStructure)
// or
Printer.TreeStructure.show(xTree)
```


The methods `quotes.reflect.Term.{asExpr, asExprOf}` provide a way to go back to a `quoted.Expr`.
Note that `asExpr` returns a `Expr[Any]`.
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