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* include/ruby/st.h (st_table): Added comment why we need __extension__.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30757 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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kosaki 2011-02-01 15:32:08 +00:00
parent eb70987c2d
commit 6909ea443f
2 changed files with 13 additions and 0 deletions
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ChangeLog
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@ -1,3 +1,7 @@
Wed Feb 2 00:30:43 2011 KOSAKI Motohiro <kosaki.motohiro@gmail.com>
* include/ruby/st.h (st_table): Added comment why we need __extension__.
Tue Feb 1 20:45:44 2011 Tanaka Akira <akr@fsij.org>
* enc/encdb.c: parenthesize macro arguments.

9
include/ruby/st.h
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@ -79,6 +79,15 @@ struct st_table {
st_index_t num_bins;
unsigned int entries_packed : 1;
#ifdef __GNUC__
/*
* C spec says,
* A bit-field shall have a type that is a qualified or unqualified
* version of _Bool, signed int, unsigned int, or some other
* implementation-defined type. It is implementation-defined whether
* atomic types are permitted.
* In short, long and long long bit-field are implementation-defined
* feature. Therefore we want to supress a warning explicitly.
*/
__extension__
#endif
st_index_t num_entries : ST_INDEX_BITS - 1;