Take a look at the charnames pragma and, in particular, its charnames::viacode(code) function, which might achieve what you're after: 

$unsupported_character = ! defined charnames::viacode($your_code)

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— Ken

In reply to Re: Tk UCS-2LE:code point too high by kcott
in thread Tk UCS-2LE:code point too high by Anonymous Monk

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