perldoc -f use as of 5.10.0/5.10.1 gives this hint in the section on use constant; use strict; et al:

Some of these pseudo-modules import semantics into the current block scope (like "strict" or "integer", unlike ordinary modules, which import symbols into the current package (which are effective through the end of the file).

which misled me into stopping to think way too early: whatever this documentation scrap might refer to, it's not the applicable here -> see my question in Re^3 below.

cu & sorry, Peter -- hint was wrong, be careful of contagious confusion.

In reply to Re: Using constants... by jakobi
in thread Using constants... by willjones

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