Re: valarray

[Jason Molenda <jsm@cygnus.com>]

Gabriel Dos Reis' mail system is having a little trouble contacting egcs,
he asked me to forward this note on for him.

----- Forwarded message -----

To: bkoz@nabi.net
Cc: Gabriel.Dos-Reis@cmla.ens-cachan.fr, egcs@egcs.cygnus.com,
        egcs-bugs@egcs.cygnus.com
Subject: Re: valarray
References: <371ACD62.68C7A607@nabi.net>
From: Gabriel Dos Reis <Gabriel.Dos-Reis@cmla.ens-cachan.fr>
In-Reply-To: benjamin kosnik's message of "Mon, 19 Apr 1999 06:29:54 +0000"

benjamin kosnik <bkoz@nabi.net> writes:

| Hey Gaby, this is for when you get back so don't worry.
| 
| I've been working on trying to run the testsuite with -02, etc and making
| sure all the required instantiations are there, etc.
| 
| I get a bunch of warnings for valarray:
| 
| lArray,_Constant,_Tp,_Tp>::_Tp' from dependent base class
| ../bits/valarray_meta.h:487: warning:   (use `typename _BinClos::_Tp' if
| that's what you meant)
| ../bits/valarray_meta.h:487: warning: lookup of `_Tp' finds `class _Tp'
| ../bits/valarray_meta.h:487: warning:   instead of `typename
| _BinClos<_Oper,_ValArray,_Constant,_Tp,_Tp>::_Tp' from dependent base class
| ../bits/valarray_meta.h:487: warning:   (use `typename _BinClos::_Tp' if
| that's what you meant)
| ../bits/valarray_meta.h:494: warning: lookup of `_Tp' finds `class _Tp'
| ../bits/valarray_meta.h:494: warning:   instead of `typename
| _BinClos<_Oper,_Constant,_ValArray,_Tp,_Tp>::_Tp' from dependent base class
| ../bits/valarray_meta.h:494: warning:   (use `typename _BinClos::_Tp' if
| that's what you meant)
| ../bits/valarray_meta.h:497: warning: lookup of `_Tp' finds `class _Tp'
| ../bits/valarray_meta.h:497: warning:   instead of `typename
| _BinClos<_Oper,_Constant,_ValArray,_Tp,_Tp>::_Tp' from dependent base class
| ../bits/valarray_meta.h:497: warning:   (use `typename _BinClos::_Tp' if
| that's what you meant)
| ../bits/valarray_meta.h:497: warning: lookup of `_Tp' finds `class _Tp'
| ../bits/valarray_meta.h:497: warning:   instead of `typename
| _BinClos<_Oper,_Constant,_ValArray,_Tp,_Tp>::_Tp' from dependent base class
| ../bits/valarray_meta.h:497: warning:   (use `typename _BinClos::_Tp' if
| that's what you meant)
| 
| 
| etc etc etc--you might want to check into this when you get a chance.

Hi Benjamin!

The problem is in the C++ front end, and the error message is
bogus [cf. 14.6.1/3]: _Tp is a template parameter as you can see from
libstdc++/bits/valarray_meta.h:

// --line 480
    template<template<class> class _Oper, typename _Tp>
    struct _BinClos<_Oper,_ValArray,_Constant,_Tp,_Tp>
        : _BinBase2<_Oper,valarray<_Tp> > {
        typedef _BinBase2<_Oper,valarray<_Tp> > _Base;
        typedef typename _Base::value_type value_type;

        _BinClos (const valarray<_Tp>& __v, const _Tp& __t) // <===
                : _Base (__v, __t) {}
    };
// --line 490


That compiler bug should be fixed before egcs-1.2 gets out. IIRC it
wasn't present in egcs-2.93.15

| Also, I noticed that TNT, from the link on the main web page, uses both
| stringstreams and valarray, so I may try to get it up and running as part
| of the testing framework. I'll let you know how it goes.

Sounds great.

-- Gaby

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