Bug#87063: marked as done ([PR libstdc++/3552] missing hash function for std::string)
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From: Goswin Brederlow <goswin.brederlow@student.uni-tuebingen.de>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: missing hash function for std::string
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Package: g++
Version: 1:2.95.3-5
Severity: normal
The STL hash_map does not work with strings. This is because no
hash<string> spezialisation is defined. The code for char* should be
used for strings also.
Heres a testcase:
----------------------------------------------------------------------
#include <hash_map>
#include <string>
// Some hash function like this one is missing
// Of cause this is a bad hack due to __s.c_str()
__STL_TEMPLATE_NULL struct hash<string>
{
size_t operator()(const string __s) const { return __stl_hash_string(__s.c_str()); }
};
int main() {
std::hash_map<std::string, std::string> myHashMap;
myHashMap["Hallo"] = "Hallo Welt";
}
----------------------------------------------------------------------
MfG,
Goswin
-- System Information
Debian Release: testing/unstable
Architecture: i386
Kernel: Linux dual 2.2.17 #1 SMP Mon Sep 4 06:13:20 CEST 2000 i686
Versions of packages g++ depends on:
ii cpp 1:2.95.3-5 The GNU C preprocessor.
ii g++-2.95 1:2.95.3-5 The GNU C++ compiler.
ii gcc-2.95 1:2.95.3-5 The GNU C compiler.
---------------------------------------
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>From doko@cs.tu-berlin.de Wed Jan 01 19:07:18 2003
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Message-ID: <15891.36984.430728.86788@gargle.gargle.HOWL>
Date: Thu, 2 Jan 2003 02:06:00 +0100
To: 87063-done@bugs.debian.org
Subject: gcc report closed upstream
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the report was closed upstream. Please see the bug log for further information.
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