🚀 go-pugleaf

I'm trying to implement bool input routines, and couldn't quite get a hang of
whether alphabetic bool input ("true", "false") must be followed by a
non-alphanumeric character or not. The latest draft says "reads characters
until it determines whether [ ... true or false sequence is present ... ]"..

I.e., given the following input:

  truefalse

What is a call to

  bool b;
  num_get<char>::get(...., b, ..);

supposed to do?  Is it supposed to consume "true", and return b == true with
the iterator pointing to 'f', or is it supposed to consume the entire token
and return a failure state without modifying b?

What about non-alphabetic bool input (i.e. reading 1 or 0)? Is that supposed
to be followed by a non-numeric character (looks like it)?

The quote from the Sep 95 draft is:

    3 If  flags.flag()  &  ios_base::boolalpha  is  false,  num_get<>::get()
      (_lib.category.numeric_) tries to read  an  integer  value,  which  if
      found  must be 0 or 1; if the boolalpha flag is true, it reads charac­
      ters until it determines whether the numpunct<>::truename() or  false­
      name() sequence23) is present.  In either case if an  exact  match  is
      not found calls setstate(failbit).

--
Shankar Unni				E-Mail:	shankar@sgi.com
Silicon Graphics Inc.			Phone:	+1-415-933-2072
URL:	http://reality.sgi.com/employees/shankar
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