Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!taumet!mike
From: mike@taumet.com (Michael S. Ball)
Newsgroups: comp.lang.c++
Subject: Re: How many arguments for operator() and operator[]?
Keywords: overloading, operator, arguments
Message-ID: <573@taumet.com>
Date: 30 Jan 91 16:02:42 GMT
References: <19587@shlump.nac.dec.com>
Reply-To: mike@taumet.UUCP (Michael S. Ball)
Organization: Taumetric Corporation, San Diego
Lines: 21

In article <19587@shlump.nac.dec.com> heintze.fmcsse.enet.dec.com (Sieg Heintze) writes:
>Could someone point me to the place in the Stroustrup and Ellis C++ Reference
>manual where they define the number of arguments permitted when defining
>a member function that overloads operator() or operator[].

See section 13.4.4 for function call and 13.4.5 for subscript.

>(3)  TURBO C++ allows two arguments for operator() and operator[].  I assume
>     that because it allows two, it will allow larger numbers of arguments 
>     also.

Allowing extra arguments for operator[] is a bug in Turbo C++.  Have you
tried to invoke such an operator?  Since [] is binary I don't see how you
can do it (barring "a.operator [](b,c)").  If you write a[b,c],
the expression b,c is taken as a comma expression which is one operand of
a binary operator.

-Mike-
-- 
Michael S. Ball			mike@taumet.com
TauMetric Corporation		(619)697-7607