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Document calling an uncurried function with a single unit argument. #166

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Jan 4, 2021
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Document calling an uncurried function with a single unit argument. #166

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21 changes: 21 additions & 0 deletions pages/docs/manual/latest/function.mdx
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Expand Up @@ -409,6 +409,27 @@ add(1, 2);

</CodeTab>

If you need to call a curried function with a single unit `()` argument, you can use the `ignore()` function:

<CodeTab labels={["ReScript", "JS Output"]}>

```res example
let echo = (. a) => a

echo(. ignore())
```

```js
function echo(a) {
return a;
}

echo(undefined);
```

</CodeTab>


If you write down the uncurried function's type, you'll add a dot there as well.

**Note**: both the declaration site and the call site need to have the uncurry annotation. That's part of the guarantee/requirement.
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