From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Borthwick <borthwic@johnson.cs.nyu.edu>
To: egcs@cygnus.com
Subject: bool
Date: Tue, 11 Nov 1997 08:27:00 -0000
Message-id: <Pine.GSO.3.92.971111110933.13267C-100000@johnson.cs.nyu.edu>
X-SW-Source: 1997-11/msg00407.html

Hi,

    I'm looking for some advice on boolean variables in g++.  I wrote a little
test program and found that with the 1997/11/05 snapshot, a bool has a size of 4
bytes.  While I recognize that this is not a valid comparison because of the use
of pointers, I found that "sizeof(vector<bool>)" gives a size of 28 bytes as did
"sizeof(bit_vector)".  My questions, then are,

--Am I better off using vector<bool> or bit_vector if I want a vector of
booleans?

--Am I correct that if space is a concern, I am better off using a "char" than a
"bool" because the former takes one byte and the latter takes four?

Thanks,
Andrew Borthwick