The problem is not with use constant: 

sub k{}
print 1-k;
print 1 -k();
print 1 -k();

[download]
gives the same error. This happens from at least 5.6.0 until 5.8.1-RC4.

What I think happens is that the parser gets confused with trying to handle the: 

 -key => value

[download]
notation.

Liz

Update: -k  File has sticky bit set. is of course a much better explanation. Thanks to BrowserUk!

In reply to Re: syntax error with constant by liz
in thread syntax error with constant by chunlou

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