Universal Character Names

Eric Lemings <eric.b.lemings@lmco.com>
10 Oct 1998 01:05:03 -0400

          From comp.compilers
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Re: Universal Character Names ok@atlas.otago.ac.nz (Dr Richard A. O'Keefe) (1998-10-17)
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From: Eric Lemings <eric.b.lemings@lmco.com>
Newsgroups: comp.compilers
Date: 10 Oct 1998 01:05:03 -0400
Organization: Lockheed Martin Astronautics
Keywords: i18n, lex

Dear readers,


In the new C and C++ language standards, identifiers
may contain universal character names (UCN). The
rule for universal character names is:


universal-character-name:
        \u hex-quad
        \U hex-quad hex-quad


hex-quad:
        hex-digit hex-digit hex-digit hex-digit


Needless to say this makes the old regexp for identifiers:


[a-zA-Z_]+[a-zA-Z0-9_]*


obsolete. How would you modify it to handle UCN?


Thanks,
Eric.

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