[Issue 13397] allow postfix function attributes like 'safe', 'system' and so on without '@'

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=13397

--- Comment #5 from Ketmar Dark <ket...@ketmar.no-ip.org> ---
(In reply to bearophile_hugs from comment #1)
> Contextual keywords as in C++? :-)

why not? ;-)

it works, it looks nice, it doesn't breaking any existing code. and it looks
much cleaner than other way around (i.e. with '@' before each attr).

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