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[Patch, regex, libstdc++/69794] Unify special character parsing

From: Tim Shen <timshen at google dot com>
To: "libstdc++" <libstdc++ at gcc dot gnu dot org>, gcc-patches <gcc-patches at gcc dot gnu dot org>
Date: Sat, 13 Feb 2016 11:13:16 -0800
Subject: [Patch, regex, libstdc++/69794] Unify special character parsing
Authentication-results: sourceware.org; auth=none

I did it wrong in r227289 - I ignored the "\n" special case in grep.
Turns out using code to handle special cases is error prone, so I
turned to use data (_M_grep_spec_char and _M_egrep_spec_char).

Bootstrapped and tested on x86_64-pc-linux-gnu.

Thanks!

-- 
Regards,
Tim Shen

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