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random.tcc (piecewise_linear_distribution<>:: operator()): Don't crash when the dist is default-constructed. 

2010-10-12  Paolo Carlini  <paolo.carlini@oracle.com>

	* include/bits/random.tcc (piecewise_linear_distribution<>::
	operator()): Don't crash when the dist is default-constructed.
	* testsuite/26_numerics/random/piecewise_linear_distribution/
	operators/call-default.cc: New.

From-SVN: r165379
This commit is contained in:
Paolo Carlini 2010-10-12 13:35:22 +00:00 committed by Paolo Carlini
parent a81f4b6785
commit d3a7350497
3 changed files with 51 additions and 0 deletions
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7
libstdc++-v3/ChangeLog
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@ -1,3 +1,10 @@
2010-10-12 Paolo Carlini <paolo.carlini@oracle.com>
* include/bits/random.tcc (piecewise_linear_distribution<>::
operator()): Don't crash when the dist is default-constructed.
* testsuite/26_numerics/random/piecewise_linear_distribution/
operators/call-default.cc: New.
2010-10-11 Jonathan Wakely <jwakely.gcc@gmail.com>
* testsuite/23_containers/bitset/cons/2.cc: Tweak.

3
libstdc++-v3/include/bits/random.tcc
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@ -2623,6 +2623,9 @@ namespace std
__aurng(__urng);
const double __p = __aurng();
if (__param._M_m.empty())
return __p;
auto __pos = std::lower_bound(__param._M_cp.begin(),
__param._M_cp.end(), __p);
const size_t __i = __pos - __param._M_cp.begin();

41
libstdc++-v3/testsuite/26_numerics/random/piecewise_linear_distribution/operators/call-default.cc Normal file
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@ -0,0 +1,41 @@
// { dg-options "-std=c++0x" }
// { dg-require-cstdint "" }
//
// 2010-10-12 Paolo Carlini <paolo.carlini@oracle.com>
//
// Copyright (C) 2010 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 26.5.8.5.3 Class template piecewise_linear_distribution
// [rand.dist.samp.plinear]
#include <random>
void
test01()
{
std::piecewise_linear_distribution<> u;
std::minstd_rand0 rng;
u(rng);
}
int main()
{
test01();
return 0;
}