Yes, that's what I meant. Just didn't know the term constant-folding. It's even more weird because 
use constant FOOBAR => "a" x 3;

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does what one expects. So the expression definitely can be evaluated at compile time.

In reply to Re^2: Why is const x const not a const? by PerlGrey
in thread Why is const x const not a const? by PerlGrey

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