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.

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