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c++/7858: g++ rejects legal code (regression from gcc 3.*)
- From: Peter Schmid <schmid at snake dot iap dot physik dot tu-darmstadt dot de>
- To: gcc-gnats at gcc dot gnu dot org
- Date: Sun, 8 Sep 2002 20:39:41 +0200
- Subject: c++/7858: g++ rejects legal code (regression from gcc 3.*)
>Number: 7858
>Category: c++
>Synopsis: g++ rejects legal code (regression from gcc 3.*)
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: rejects-legal
>Submitter-Id: net
>Arrival-Date: Sun Sep 08 11:46:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator: Peter Schmid
>Release: 3.3 20020905 (experimental)
>Organization:
TU Darmstadt
>Environment:
System: Linux kiste 2.4.18 #8 Sat Mar 9 15:33:15 CET 2002 i686 unknown
Architecture: i686
GNU ld version 2.13.90.0.4 20020814
host: i686-pc-linux-gnu
build: i686-pc-linux-gnu
target: i686-pc-linux-gnu
configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads=posix --enable-languages=c,c++,f77,objc --enable-__cxa_atexit
>Description:
The g++ compiler built from current mainline cvs sources rejects the
following code tc1.C breaking boost and STLport. Previous g++ compilers,
including gcc 3.3 bootstrapped one week ago, compile this code normally.
>How-To-Repeat:
source code tc1.C
namespace std
{
template <class _Arg, class _Result>
struct unary_function {
typedef _Arg argument_type;
typedef _Result result_type;
};
template <class _Arg1, class _Arg2, class _Result>
struct binary_function {
typedef _Arg1 first_argument_type;
typedef _Arg2 second_argument_type;
typedef _Result result_type;
};
template <class _Tp>
struct plus : public binary_function<_Tp,_Tp,_Tp> {
_Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x + __y; }
};
template <class _Operation>
class binder1st
: public unary_function<typename _Operation::second_argument_type,
typename _Operation::result_type> {
protected:
_Operation op;
typename _Operation::first_argument_type value;
public:
binder1st(const _Operation& __x,
const typename _Operation::first_argument_type& __y)
: op(__x), value(__y) {}
typename _Operation::result_type
operator()(const typename _Operation::second_argument_type& __x) const {
return op(value, __x);
}
typename _Operation::result_type
operator()(typename _Operation::second_argument_type& __x) const {
return op(value, __x);
}
};
template <class _Operation, class _Tp>
inline binder1st<_Operation>
bind1st(const _Operation& __fn, const _Tp& __x)
{
typedef typename _Operation::first_argument_type _Arg1_type;
return binder1st<_Operation>(__fn, _Arg1_type(__x));
}
} // namespace std
template<typename _InputIter, typename _OutputIter, typename _UnaryOperation>
_OutputIter
transform(_InputIter __first, _InputIter __last,
_OutputIter __result, _UnaryOperation __unary_op)
{
for ( ; __first != __last; ++__first, ++__result)
*__result = __unary_op(*__first);
return __result;
}
int main()
{
char a[10];
char b[10];
transform(a, a+10,
b, std::bind1st(std::plus<char>(), 1));
}
compiling tc1.C
g++ -v tc1.C -W -Wall
Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3/specs
Configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads=posix --enable-languages=c,c++,f77,objc --enable-__cxa_atexit
Thread model: posix
gcc version 3.3 20020905 (experimental)
/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3/cc1plus -quiet -v -D__GNUC__=3 -D__GNUC_MINOR__=3 -D__GNUC_PATCHLEVEL__=0 -D_GNU_SOURCE tc1.C -D__GNUG__=3 -quiet -dumpbase tc1.C -auxbase tc1 -W -Wall -version -o /tmp/cc9l1up9.s
GNU C++ version 3.3 20020905 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 3.3 20020905 (experimental).
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/local/include/c++/3.3
/usr/local/include/c++/3.3/i686-pc-linux-gnu
/usr/local/include/c++/3.3/backward
/usr/local/include
/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.3/include
/usr/include
End of search list.
tc1.C: In function `std::binder1st<_Operation> std::bind1st(const _Operation&,
const _Tp&) [with _Operation = std::plus<char>, _Tp = int]':
tc1.C:69: instantiated from here
tc1.C:47: error: non-lvalue in unary `&'
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted: