After switching to Function::Parameters, I noticed Perl::Critic no longer worked. For example, for the old fashioned 
sub foo { $_[0] + 1 }

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perlcritic -1 outputs 
Always unpack @_ first at line 22, column 1.  See page 178 of PBP.  (S
+everity: 4)
Subroutine "foo" does not end with "return" at line 22, column 1.  See
+ page 197 of PBP.  (Severity: 4)

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but for the equivalent 

use Function::Parameters;
fun foo ($x) {
    $x + 1
}

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it doesn't say anything.

I've found a partial workaround: running perlcritic on the output of B::Deparse instead of the source itself. It reports lots of sins committed by Function::Parameters themselves (e.g. Magic variable "$^H" should be assigned as "local" at line 14, column 44. See pages 81,82 of PBP.) but seems to work.

Unfortunately, it gets more complex when Types::Standard are added to the mix. 

use Function::Parameters;
use Types::Standard qw( Num );

fun foo (Num $x) {
    $x + 1
}

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The code doesn't look much more complicated, but running perl -MO=Deparse on it just hangs. Output of strace ends with endlessly repeating lines: 
mmap(NULL, 192512, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1
+, 0) = 0x7fe772fdf000
mremap(0x7fe771772000, 532480, 536576, MREMAP_MAYMOVE) = 0x7fe77177200
+0
brk(0x49ac000)                          = 0x49ac000
brk(0x49cd000)                          = 0x49cd000
mremap(0x7fe771772000, 536576, 540672, MREMAP_MAYMOVE) = 0x7fe77177200
+0
brk(0x49ee000)                          = 0x49ee000
brk(0x49ed000)                          = 0x49ed000
brk(0x4a0e000)                          = 0x4a0e000
brk(0x4a2f000)                          = 0x4a2f000
mremap(0x7fe771772000, 540672, 544768, MREMAP_MAYMOVE) = 0x7fe77177200
+0
...

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The perl process seems to grow in memory very slowly at the same time.

Has anyone succeeded in linting a code that uses the above mentioned modules? Tips, tricks, suggestions welcome.

map{substr$_->[0],$_->[1]||0,1}[\*||{},3],[[]],[ref qr-1,-,-1],[{}],[sub{}^*ARGV,3]

In reply to Function::Parameters, Types::Standard, and Perl::Critic by choroba

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