Consider: 
#...
use utf8;
foo ("string in utf8 format");
no utf8;
foo ("string containing 8-bit character set high chars");

[download]
How can foo tell whether its caller had utf8 mode or not?

A better way might be to have foo check the encoding persuasion of the parameter. There is no built-in function for that, and I use the taint-like trick to flip it. But how do I test it? —John

In reply to Caller's utf8 setting? by John M. Dlugosz

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