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From: ericg@ucschu.ucsc.edu (Eric Goodman)
Newsgroups: comp.lang.c++
Subject: Vector classes in 1.2 (was Re: Re vectors and clobbering...)
Message-ID: <5184@darkstar.ucsc.edu>
Date: 16 Jul 90 20:22:47 GMT
References: <6570@helios.TAMU.EDU>
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In article <6570@helios.TAMU.EDU> jeffw@cs.tamu.edu (Jeffrey A Waller) 
writes:
> I think I remember in the 1.2 Stroustrup book that to be an element of a 
> vector, a class must have a constructor with no arguments.  
> IntArray(int sz = ArraySize) should qualify, but apparently TC++ dosen't
> recognize it, for a quick fix--maybe not much help, redefine
> IntArray(int sz = ArraySize) as two constructors.  IntArray(int sz) and
> IntArray(), in which sz is set to ArraySize, maybe that will work.

To be a vector type in 1.2 (and maybe later) versions, a class must have a 
constructor that takes no arguments *even if* they are defaulted so that 
none need be passed.  Because the compiler implicitly passes them you're 
still confusing it.

IntArray(int sz = ArraySize) 

is not a legal constructor for a vector type, its not just a TC++ bug (if 
it's pre 2.0).

Eric Goodman, UC Santa Cruz

ericg@ucschu.ucsc.edu                              ericg@ucschu.bitnet
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