[Bug libstdc++/21193] provide better std::tr1::hash for std::string and std::wstring

[cvs-commit at gcc dot gnu dot org]

------- Additional Comments From cvs-commit at gcc dot gnu dot org  2005-07-15 00:05 -------
Subject: Bug 21193

CVSROOT:	/cvs/gcc
Module name:	gcc
Changes by:	paolo@gcc.gnu.org	2005-07-15 00:05:45

Modified files:
	libstdc++-v3   : ChangeLog 
	libstdc++-v3/include/tr1: functional 

Log message:
	2005-07-14  Paolo Carlini  <pcarlini@suse.de>
	
	PR libstdc++/21193 (float, double, long double)
	* include/tr1/functional (hash<float>, hash<double>):
	Reimplement exploiting the Fnv_hash<>::hash helper.
	(hash<long double>): Reimplement using frexp (in this
	case, due to random padding bits, the former approach
	is not generally viable).

Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libstdc++-v3/ChangeLog.diff?cvsroot=gcc&r1=1.3058&r2=1.3059
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libstdc++-v3/include/tr1/functional.diff?cvsroot=gcc&r1=1.12&r2=1.13



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21193