On Wed, 26 Sep 2001, Yung-Fong Tang wrote:

> how can you implement tolower(U+4ff3a) without knowing what U+4ff3a is ?

With a data table.  One set of debugged code that handles surrogates,
composing characters, bidirectionality etc. coupled with a datafile that
gets upgraded with each release of Unicode.  How many years does it take
to implement some of these concepts?  It shouldn't require
honest-to-goodness we-were't-kidding see-here's-one-defined-now characters
for developers to slap themselves on the head and start developing support
for these things.

Geoffrey 


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