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typo: Fix "unkown" to "unknown" #2045

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May 23, 2021
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typo: Fix "unkown" to "unknown" #2045

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26 changes: 13 additions & 13 deletions _overviews/scala3-macros/tutorial/inline.md
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Original file line number Diff line number Diff line change
Expand Up @@ -286,7 +286,7 @@ x2 * 1.0
In contrast, let us imagine we do not know the value of `n`:

```scala
power(2, unkownNumber)
power(2, unknownNumber)
```
Driven by the inline annotation on the parameter, the compiler will try to unroll the recursion.
But without any success, since the parameter is not statically known.
Expand All @@ -297,22 +297,22 @@ But without any success, since the parameter is not statically known.
```scala
// first inlines as
val x = 2
if (unkownNumber == 0) 1.0
else if (unkownNumber % 2 == 1) x * power(x, unkownNumber - 1)
else power(x * x, unkownNumber / 2)
if (unknownNumber == 0) 1.0
else if (unknownNumber % 2 == 1) x * power(x, unknownNumber - 1)
else power(x * x, unknownNumber / 2)
// then inlined as
val x = 2
if (unkownNumber == 0) 1.0
else if (unkownNumber % 2 == 1) x * {
if (unkownNumber - 1 == 0) 1.0
else if ((unkownNumber - 1) % 2 == 1) x2 * power(x2, unkownNumber - 1 - 1)
else power(x2 * x2, (unkownNumber - 1) / 2)
if (unknownNumber == 0) 1.0
else if (unknownNumber % 2 == 1) x * {
if (unknownNumber - 1 == 0) 1.0
else if ((unknownNumber - 1) % 2 == 1) x2 * power(x2, unknownNumber - 1 - 1)
else power(x2 * x2, (unknownNumber - 1) / 2)
}
else {
val x2 = x * x
if (unkownNumber / 2 == 0) 1.0
else if ((unkownNumber / 2) % 2 == 1) x2 * power(x2, unkownNumber / 2 - 1)
else power(x2 * x2, unkownNumber / 2 / 2)
if (unknownNumber / 2 == 0) 1.0
else if ((unknownNumber / 2) % 2 == 1) x2 * power(x2, unknownNumber / 2 - 1)
else power(x2 * x2, unknownNumber / 2 / 2)
}
// Oops this will never finish compiling
...
Expand All @@ -331,7 +331,7 @@ inline def power(x: Double, inline n: Int): Double =

```scala
power(2, 2) // Ok
power(2, unkownNumber) // error
power(2, unknownNumber) // error
```

We will come back to this example later and see how we can get more control on how code is generated.
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