[PATCH] Unary plus

[Nathan Sidwell]

Hi,
gdb doesn't parse or evaluate the unary plus operator (but does have one).
gdb.trace/collection.exp contains such an expression -- 'a[+b]'. This patch
adds the necessary parsing and evaluation machinery.

built & tested on i686-px-linux-gnu and an unreleased architecture. ok?

nathan
-- 
Nathan Sidwell    ::   http://www.codesourcery.com   ::     CodeSourcery LLC
nathan@codesourcery.com    ::     http://www.planetfall.pwp.blueyonder.co.uk

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