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std_valarray.h (valarray<>::operator[] const): Return a const reference.

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* include/bits/std_valarray.h (valarray<>::operator[] const):
        Return a const reference.
        * testsuite/26_numerics/valarray_const_bracket.cc: New test.

From-SVN: r42245
This commit is contained in:
Gabriel Dos Reis 2001-05-18 05:47:46 +00:00
parent a75b7b0bd7
commit 5c542b4a19
2 changed files with 51 additions and 2 deletions
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5
libstdc++-v3/include/bits/std_valarray.h
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@ -120,7 +120,8 @@ namespace std
operator= (const _Expr<_Dom,_Tp>&);
// _lib.valarray.access_ element access:
_Tp operator[](size_t) const;
// XXX: LWG to be resolved.
const _Tp& operator[](size_t) const;
_Tp& operator[](size_t);
// _lib.valarray.sub_ subset operations:
_Expr<_SClos<_ValArray,_Tp>, _Tp> operator[](slice) const;
@ -236,7 +237,7 @@ namespace std
template<typename _Tp>
inline _Tp
inline const _Tp&
valarray<_Tp>::operator[] (size_t __i) const
{ return _M_data[__i]; }

48
libstdc++-v3/testsuite/26_numerics/valarray_const_bracket.cc Normal file
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@ -0,0 +1,48 @@
// 20010518 gdr
// Copyright (C) 2001 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
#include <valarray>
// dg-do compile
template<typename P>
void copy(P, std::size_t) { }
template<typename T>
void test(const std::valarray<T>& v)
{
copy(&v[0], v.size());
}
int main()
{
std::valarray<double> v(190);
test(v);
return 0;
}