Function Calls

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# Function Calls

_Parentheses call a function or constructor with lazily-evaluated arguments._

Parentheses call a function or constructor. Arguments are expressions, evaluated lazily; the call evaluates the body in a fresh context.

```wcl
n      = len(items)
total  = sum(map(items, fn(x: i64) -> i64 x * 2))
shape  = Point { x: 1.0, y: 2.0 }
```

## Related

- [Member Access](../references/concept_member_access.md)

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