What the reason is that my(my $x) and my(0?$x:$y) are accept isn't clear to me.

my(0?$x:$y) gets constant-folded to valid my($y). The validity checker apparently runs after constant-folding.

$lex and my $lex are the same op. The only difference is the LVINTRO flag. The validity checker apparently doesn't check the flag.

Can't localize lexical variable $x

This is consistent with my guess at the workings, that any variable lookup in the my argument expression is taken to be a lexical declaration. local craps out on the lexical passed to it. (Don't forget, local doesn't declare variables.)

In reply to Re^5: my (0?$a:$b): a koan by ikegami
in thread my (0?$a:$b): a koan by educated_foo

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