Chained Modifiers

I'm not sure if it's anywhere in the specs, but I was expecting to be able
to do this:

.say for =$in unless $foo;

Where we have multiple modifiers, here "for" and "unless". Is this in the
specs? If yes, is it supposed to work in pugs or rakudo? If it's not in the
specs can we add it? ;-)

• Chained Modifiers by Chris Davaz
• Re: Chained Modifiers by Moritz Lenz
• Re: Chained Modifiers by Larry Wall