[swift-users] Request advice on closed range operator

[Jens Alfke]

> On Feb 14, 2016, at 9:37 AM, Peter van der Linden via swift-users <swift-users at swift.org> wrote:
> 
> I find it unusual that adding white space between two tokens can cause the compiler to emit an error message. 

This is by design. Swift is less lenient about whitespace than most C-derived languages. This helps the parser distinguish where operators begin and end, which allows programs to define arbitrary custom operators.

—Jens
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